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GeoB
Joined: 16 Jun 2009
Posts: 207
Location: Fresno, CA
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 Posted: Wed Aug 20, 2014 3:45 pm Post subject: Radio intercom |
 |
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| Quote: | Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
|
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Wed Aug 20, 2014 4:44 pm Post subject: Radio intercom |
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Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
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_blank">http://forums.matronics.com
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target="_blank">http://www.matronics.com/contribution
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[quote][b]
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byoungplumbing(at)gmail.c
Guest
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| Posted: Wed Aug 20, 2014 5:32 pm Post subject: Radio intercom |
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Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring....  want belt and suspenders ,, use a smaller capacitor before and after the inductor.   For the right size I'll have to look when I get home
Boyd On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:[quote] Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
     -Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
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If you forward this email, or any part of it, please remove my email address before sending.
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get="_blank">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Wed Aug 20, 2014 5:54 pm Post subject: Radio intercom |
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I did the ferrite thingys and believe me it is better to go with the capacitor.Larry
On Wed, Aug 20, 2014 at 7:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring....  want belt and suspenders ,, use a smaller capacitor before and after the inductor.   For the right size I'll have to look when I get home
Boyd On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote: | Quote: | Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
     -Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
|
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If you forward this email, or any part of it, please remove my email address before sending.
get="_blank">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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If you forward this email, or any part of it, please remove my email address before sending.
[quote][b]
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byoungplumbing(at)gmail.c
Guest
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| Posted: Wed Aug 20, 2014 6:01 pm Post subject: Radio intercom |
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I'll bow to your experience
Boyd
Do not archive On Aug 20, 2014 7:56 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:[quote] I did the ferrite thingys and believe me it is better to go with the capacitor.Larry
On Wed, Aug 20, 2014 at 7:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring....  want belt and suspenders ,, use a smaller capacitor before and after the inductor.   For the right size I'll have to look when I get home
Boyd On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote: | Quote: | Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
     -Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
|
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If you forward this email, or any part of it, please remove my email address before sending.
get="_blank">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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If you forward this email, or any part of it, please remove my email address before sending.
| Quote: |
get="_blank">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
|
[b]
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rlaird
Joined: 10 Jan 2006
Posts: 373
Location: Houston
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| Posted: Thu Aug 21, 2014 4:31 am Post subject: Radio intercom |
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|
On Wed, Aug 20, 2014 at 7:44 PM, Larry Cottrell <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:
| Quote: | | Its the large one, 20-25000, I can't remember and I have it cushioned |
Thanks, Larry, for saying this... it's a VERY good practice to cushion the heck out of the capacitor... it's wall is very thin and it will get rubbed through in no time if you don't cushion it well!
 -- Robert
[quote][b]
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_________________
~~~~~~~~~~~~~~~~~~~
Robert Laird
formerly: MkIIIc w/ 912ULS & Gyrobee
current: Autogyro Cavalon w/ 914ULS
Houston, TX area
http://www.Texas-Flyer.com |
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frank goodnight
Joined: 27 Dec 2011
Posts: 126
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| Posted: Thu Aug 21, 2014 5:22 am Post subject: Radio intercom |
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|
After reading everything I could find about capacitors , it seems that a A/C capacitor
can be used anywhere in place of a DC because it is non polarized. A DC cannot be
used in a AC circuit or hooked up with reverse polarity or it will burn up. The only reason
for a DC is that it is 1/2 the price of a AC. I don't know if this is fact or fiction. As I am
having trouble finding a DC 22,000 mf would someone that is a little more knowledgable
than me please tell me if a AC will help reduce the engine noise when I transmit.
Frank G
Fayetteville AR
MK 3 Classic ULS Sent from my iPad
On Aug 20, 2014, at 8:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
[quote]
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring.... want belt and suspenders ,, use a smaller capacitor before and after the inductor. For the right size I'll have to look when I get home
Boyd On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote: | Quote: | Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
|
--
If you forward this email, or any part of it, please remove my email address before sending.
===================================
://www.matronics.com/Navigator?Kolb-List
===================================
cs.com
===================================
matronics.com/contribution
===================================
|
[b]
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herbgh(at)nctc.com
Guest
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| Posted: Thu Aug 21, 2014 6:18 am Post subject: Radio intercom |
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|
Good capacitors are in every junk piece of electronics at the salvage yard...anything from 1000 mfd on up should work.. Computer, switching power supplies use 400 to 600 mfd in the first section of the supply...just past the full wave bridge...even those may be enough...two in parallel would double the capacity...
frugal Herb....
On 08/21/2014 08:22 AM, Frank Goodnight wrote:
[quote] After reading everything I could find about capacitors , it seems that a A/C capacitor
can be used anywhere in place of a DC because it is non polarized. A DC cannot be
used in a AC circuit or hooked up with reverse polarity or it will burn up. The only reason
for a DC is that it is 1/2 the price of a AC. I don't know if this is fact or fiction. As I am
having trouble finding a DC 22,000 mf would someone that is a little more knowledgable
than me please tell me if a AC will help reduce the engine noise when I transmit.
Frank G
Fayetteville AR
MK 3 Classic ULS Â Â Â Sent from my iPad
On Aug 20, 2014, at 8:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring....  want belt and suspenders ,, use a smaller capacitor before and after the inductor.   For the right size I'll have to look when I get home
Boyd On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote: | Quote: | Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
     -Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
|
--
If you forward this email, or any part of it, please remove my email address before sending.
===================================
://www.matronics.com/Navigator?Kolb-List
===================================
cs.com
===================================
matronics.com/contribution
===================================
|
|
[b]
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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sfrIII
Joined: 09 Jun 2013
Posts: 10
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| Posted: Thu Aug 21, 2014 11:19 am Post subject: Radio intercom |
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|
Dear fellow Kolbers
I don't know much about capacitors but is bigger better?
Back in my car audio days we used "1 FARAD" capacitors.  These
held power in reserve so at night when you were driving, Â the head lights
would not flicker up and down as the sub woofer went "BOOM " "BOOM".
1 FARAD = 1,000,000 MF.
Thanks in advance;
Sam Ragland
From: owner-kolb-list-server(at)matronics.com [mailto:owner-kolb-list-server(at)matronics.com] On Behalf Of Herb
Sent: Thursday, August 21, 2014 8:18 AM
To: kolb-list(at)matronics.com
Subject: Re: Re: Radio intercom
Good capacitors are in every junk piece of electronics at the salvage yard...anything from 1000 mfd on up should work.. Computer, switching power supplies use 400 to 600 mfd in the first section of the supply...just past the full wave bridge...even those may be enough...two in parallel would double the capacity...
frugal Herb....
On 08/21/2014 08:22 AM, Frank Goodnight wrote:
| Quote: |
After reading everything I could find about capacitors , it seems that a A/C capacitor
can be used anywhere in place of a DC because it is non polarized. A DC cannot be
used in a AC circuit or hooked up with reverse polarity or it will burn up. The only reason
for a DC is that it is 1/2 the price of a AC. I don't know if this is fact or fiction. As I am
having trouble finding a DC 22,000 mf would someone that is a little more knowledgable
than me please tell me if a AC will help reduce the engine noise when I transmit.
Frank G
Fayetteville AR
MK 3 Classic ULS Sent from my iPad
On Aug 20, 2014, at 8:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring.... want belt and suspenders ,, use a smaller capacitor before and after the inductor. For the right size I'll have to look when I get home
Boyd
On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:
Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can.
Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
--> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
| Quote: | Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
|
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
--
If you forward this email, or any part of it, please remove my email address before sending.
012345
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9<    - MATRONICS WEB FORUMS via the Web   --> http://forums.matronics.com        - List Contribution Web generous                        -Matt http://www.matronics.com/c=[/b]get="_blank">http://www.matronics.com/Navigator?Kolb-List[/quote]0
[quote][b]
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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rowedenny
Joined: 09 Mar 2008
Posts: 338
Location: Western PA
|
| Posted: Thu Aug 21, 2014 12:21 pm Post subject: Radio intercom |
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|
Different application there, the huge cap you used was to provide more current for the Bass in your stereo, like a hydraulic accumulator. Here caps are used to short noise spikes to ground to clean up our 12 volt dc
Dennis "Skid" RoweMk3, Rotax 670,
Leechburg, PA
On Aug 21, 2014, at 3:18 PM, "Samuel Ragland" <sfr3(at)speedyquick.net (sfr3(at)speedyquick.net)> wrote:
[quote] <![endif]--> <![endif]-->
Dear fellow Kolbers
I don't know much about capacitors but is bigger better?
Back in my car audio days we used "1 FARAD" capacitors.  These
held power in reserve so at night when you were driving, Â the head lights
would not flicker up and down as the sub woofer went "BOOM " "BOOM".
1 FARAD = 1,000,000 MF.
Thanks in advance;
Sam Ragland
From: owner-kolb-list-server(at)matronics.com (owner-kolb-list-server(at)matronics.com) [mailto:owner-kolb-list-server(at)matronics.com (owner-kolb-list-server(at)matronics.com)] On Behalf Of Herb
Sent: Thursday, August 21, 2014 8:18 AM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: Re: Radio intercom
Good capacitors are in every junk piece of electronics at the salvage yard...anything from 1000 mfd on up should work.. Computer, switching power supplies use 400 to 600 mfd in the first section of the supply...just past the full wave bridge...even those may be enough...two in parallel would double the capacity...
frugal Herb....
On 08/21/2014 08:22 AM, Frank Goodnight wrote:
| Quote: |
After reading everything I could find about capacitors , it seems that a A/C capacitor
can be used anywhere in place of a DC because it is non polarized. A DC cannot be
used in a AC circuit or hooked up with reverse polarity or it will burn up. The only reason
for a DC is that it is 1/2 the price of a AC. I don't know if this is fact or fiction. As I am
having trouble finding a DC 22,000 mf would someone that is a little more knowledgable
than me please tell me if a AC will help reduce the engine noise when I transmit.
Frank G
Fayetteville AR
MK 3 Classic ULS Sent from my iPad
On Aug 20, 2014, at 8:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring.... want belt and suspenders ,, use a smaller capacitor before and after the inductor. For the right size I'll have to look when I get home
Boyd
On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:
Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can.
Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
--> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
| Quote: | Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
|
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
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rowedenny
Joined: 09 Mar 2008
Posts: 338
Location: Western PA
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| Posted: Thu Aug 21, 2014 12:22 pm Post subject: Radio intercom |
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I got a 2200uf Mallory electrolytic cap today. Should be able to try it soon. Also discovered my patch cords were incorrect. Ordering right ones
Dennis "Skid" RoweMk3, Rotax 670,
Leechburg, PA
On Aug 21, 2014, at 10:18 AM, Herb <herbgh(at)nctc.com (herbgh(at)nctc.com)> wrote:
[quote] Good capacitors are in every junk piece of electronics at the salvage yard...anything from 1000 mfd on up should work.. Computer, switching power supplies use 400 to 600 mfd in the first section of the supply...just past the full wave bridge...even those may be enough...two in parallel would double the capacity...
frugal Herb....
On 08/21/2014 08:22 AM, Frank Goodnight wrote:
| Quote: | After reading everything I could find about capacitors , it seems that a A/C capacitor
can be used anywhere in place of a DC because it is non polarized. A DC cannot be
used in a AC circuit or hooked up with reverse polarity or it will burn up. The only reason
for a DC is that it is 1/2 the price of a AC. I don't know if this is fact or fiction. As I am
having trouble finding a DC 22,000 mf would someone that is a little more knowledgable
than me please tell me if a AC will help reduce the engine noise when I transmit.
Frank G
Fayetteville AR
MK 3 Classic ULS Sent from my iPad
On Aug 20, 2014, at 8:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring.... want belt and suspenders ,, use a smaller capacitor before and after the inductor. For the right size I'll have to look when I get home
Boyd On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote: | Quote: | Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
|
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If you forward this email, or any part of it, please remove my email address before sending.
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matronics.com/contribution
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sfrIII
Joined: 09 Jun 2013
Posts: 10
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| Posted: Thu Aug 21, 2014 12:38 pm Post subject: Radio intercom |
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Thanks for the info!
Sam Ragland
From: owner-kolb-list-server(at)matronics.com [mailto:owner-kolb-list-server(at)matronics.com] On Behalf Of Dennis Rowe
Sent: Thursday, August 21, 2014 2:21 PM
To: kolb-list(at)matronics.com
Subject: Re: Re: Radio intercom
Different application there, the huge cap you used was to provide more current for the Bass in your stereo, like a hydraulic accumulator. Here caps are used to short noise spikes to ground to clean up our 12 volt dc
Dennis "Skid" Rowe
Mk3, Rotax 670,
Leechburg, PA
On Aug 21, 2014, at 3:18 PM, "Samuel Ragland" <sfr3(at)speedyquick.net (sfr3(at)speedyquick.net)> wrote:
| Quote: |
Dear fellow Kolbers
I don't know much about capacitors but is bigger better?
Back in my car audio days we used "1 FARAD" capacitors.  These
held power in reserve so at night when you were driving, Â the head lights
would not flicker up and down as the sub woofer went "BOOM " "BOOM".
1 FARAD = 1,000,000 MF.
Thanks in advance;
Sam Ragland
From: owner-kolb-list-server(at)matronics.com (owner-kolb-list-server(at)matronics.com) [mailto:owner-kolb-list-server(at)matronics.com (owner-kolb-list-server(at)matronics.com)] On Behalf Of Herb
Sent: Thursday, August 21, 2014 8:18 AM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: Re: Radio intercom
Good capacitors are in every junk piece of electronics at the salvage yard...anything from 1000 mfd on up should work.. Computer, switching power supplies use 400 to 600 mfd in the first section of the supply...just past the full wave bridge...even those may be enough...two in parallel would double the capacity...
frugal Herb....
On 08/21/2014 08:22 AM, Frank Goodnight wrote:
| Quote: |
After reading everything I could find about capacitors , it seems that a A/C capacitor
can be used anywhere in place of a DC because it is non polarized. A DC cannot be
used in a AC circuit or hooked up with reverse polarity or it will burn up. The only reason
for a DC is that it is 1/2 the price of a AC. I don't know if this is fact or fiction. As I am
having trouble finding a DC 22,000 mf would someone that is a little more knowledgable
than me please tell me if a AC will help reduce the engine noise when I transmit.
Frank G
Fayetteville AR
MK 3 Classic ULS Sent from my iPad
On Aug 20, 2014, at 8:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring.... want belt and suspenders ,, use a smaller capacitor before and after the inductor. For the right size I'll have to look when I get home
Boyd
On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:
Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can.
Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
--> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
| Quote: | Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
|
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
===========
-List" target="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
--
If you forward this email, or any part of it, please remove my email address before sending.
012345
|
678 |
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ceengland7(at)gmail.com
Guest
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| Posted: Fri Aug 22, 2014 10:32 am Post subject: Radio intercom |
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Here you go:
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.X22000mfd+capacitor&_nkw=22000mfd+capacitor&_sacat=0
I'll bet you can get by with less than half that size (but be sure to keep the voltage rating above 50 volts).
 When talking about electrolytic caps (most of the 'can' type polarized caps), an AC capacitor is 2 DC capacitors mounted electrically back to back (in series, with *either* the 2 + terminals *or* the 2 - terminals tied together) in the same case. It takes twice the capacity in each DC cap to make an AC cap: 2ea 100mfd caps back to back to make a 50mfd AC capacitor.
Someone may have already mentioned this: grounding and ground paths can make a *huge* difference in noise pickup. In bigger a/c, there's lots of talk about 'single point grounding', and 'ground loops'. Grounding at a single point forces every electrical device in the plane to return its electrons through only one path back to the battery negative. If you have 'local' grounds (to the airframe), then there can be multiple paths (ground loops) back to battery negative, meaning that other devices may see the energy in that ground path, causing 'noise'. In a plane as small and simple as a Kolb, it shouldn't be difficult to run ground wires from everything to the battery negative. If it's a 2 seat plane, mic & headphone jacks in particular should be isolated from the frame so that their ground wires go *only* to the correct terminal on the intercom.
Charlie
(Yes, I know that the electrons actually *originate* at the battery negative, but it's simpler to talk about them in 'traditional' terms for the sake of troubleshooting.)
On 8/21/2014 8:22 AM, Frank Goodnight wrote:
[quote] After reading everything I could find about capacitors , it seems that a A/C capacitor
can be used anywhere in place of a DC because it is non polarized. A DC cannot be
used in a AC circuit or hooked up with reverse polarity or it will burn up. The only reason
for a DC is that it is 1/2 the price of a AC. I don't know if this is fact or fiction. As I am
having trouble finding a DC 22,000 mf would someone that is a little more knowledgable
than me please tell me if a AC will help reduce the engine noise when I transmit.
Frank G
Fayetteville AR
MK 3 Classic ULS Â Â Â Sent from my iPad
On Aug 20, 2014, at 8:32 PM, B Young <byoungplumbing(at)gmail.com (byoungplumbing(at)gmail.com)> wrote:
| Quote: |
Another devise that can help is an inductor... a lot of car audio systems use them... home brew by wrapping a steel nail with the power wire and put it I am old film canister or small pill bottle. Or wrap the wire around a ferrite ring....  want belt and suspenders ,, use a smaller capacitor before and after the inductor.   For the right size I'll have to look when I get home
Boyd On Aug 20, 2014 6:46 PM, "Larry Cottrell" <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote: | Quote: | Its the large one, 20-25000, I can't remember and I have it cushioned and tie wrapped to the side of the cage. There are two screws on the top of the capacitor. One + one -. The hot wire going to the radio goes to the + and continues on to the radio. The - goes to the ground bar. The info that some one furnished earlier says the ground should go straight to the battery rather than to a common ground. I will have to change that as soon as I can. Larry
On Wed, Aug 20, 2014 at 5:45 PM, George Bearden <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)> wrote:
| Quote: | --> Kolb-List message posted by: "George Bearden" <gab16(at)sbcglobal.net (gab16(at)sbcglobal.net)>
> Larry said;
"I installed a large capacitor (per John Hauck) and it now transmits loud
and clear. The only noise that I hear in it is the quiet click of the
strobes"
Hope mine sounds that good. That's incredible. I assume the capacitor is
used as a by-pass, from hot to grnd? Do you recall the value?
Sporty's SP-200
ICOM IC-A20
IC-A2
|
|
|
[b]
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