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jan.mevis(at)informavia.b
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 Posted: Tue Nov 07, 2006 10:40 pm Post subject: Yak 50 radio |
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Hi all,
I replaced my old ZIABRIK radio by a new BRIZ (which works perfectly, tested in a lab). But when installed, it sometimes works, sometimes does not.
I discovered that I only have 3 volts on the supply wire when switching on the “radio” button on the front panel. First I thought it was the battery, but I checked it, and it’s in perfect shape.
One of the symptoms : I hear some “clicking” or “ticking” in the headset, and usually after 3 to 4 minutes, it switches on. As if one or another relay tries to switch on ?
It’s definitely not the new radio, since I am using a provisional bypass, connecting it immediately to the battery – until the problem is solved. The problem is not introduced with the new radio either, since with the old radio, I had the same problem. This is the reason why I was forced to replace the old radio (thinking it was dead).
Any idea ?
Best regards,
Jan Mevis
Yak 50 RA2005K
[quote][b]
| | - The Matronics Yak-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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mark.bitterlich(at)navy.m
Guest
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| Posted: Wed Nov 08, 2006 2:41 pm Post subject: Yak 50 radio |
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|
Sure....
You've got some resistance on the wire between the radio and the battery. That is assuming that you have the radio connected, and are measuring the voltage from some point that feeds the radio. If you want to prove this premise, remove the radio from the mount, and then read the voltage again. If it jumps up to 28 volts with the radio removed, and drops to 3 volts with the radio installed, that is without a doubt... your problem. To find the problem, simply take your voltmeter (with the radio installed) and start working backwards towards the battery/power source. When it goes from 3 back up to 28, the problem is in the middle between those two points.
You can also remove the radio, and connect a light bulb (28 volt) from the power pin to ground. It will light dimly if at all. Go back and start jiggling everything. When the light comes on brightly, you have wiggled the right thing! The old light bulb trick is handy in all manner of applications. Shorts AND opens....
For clarification, it would be nice to know where you are measuring the radio voltage from, etc. But ASSUMING (dangerous thing to do) that you are measuring it with the radio installed, and are reading it from a known point that for SURE feeds the radio... then the method described above will work without question.
Good luck,
Mark Bitterlich
N50YK
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, November 08, 2006 1:39
To: yak-list(at)matronics.com
Subject: Yak 50 radio
Hi all,
I replaced my old ZIABRIK radio by a new BRIZ (which works perfectly, tested in a lab). But when installed, it sometimes works, sometimes does not.
I discovered that I only have 3 volts on the supply wire when switching on the “radio” button on the front panel. First I thought it was the battery, but I checked it, and it’s in perfect shape.
One of the symptoms : I hear some “clicking” or “ticking” in the headset, and usually after 3 to 4 minutes, it switches on. As if one or another relay tries to switch on ?
It’s definitely not the new radio, since I am using a provisional bypass, connecting it immediately to the battery – until the problem is solved. The problem is not introduced with the new radio either, since with the old radio, I had the same problem. This is the reason why I was forced to replace the old radio (thinking it was dead).
Any idea ?
Best regards,
Jan Mevis
Yak 50 RA2005K
[quote]
href="http://www.aeroelectric.com">www.aeroelectric.com
href="http://www.buildersbooks.com">www.buildersbooks.com
href="http://www.kitlog.com">www.kitlog.com
href="http://www.homebuilthelp.com">www.homebuilthelp.com
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List
[b]
| | - The Matronics Yak-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:
http://www.matronics.com/Navigator?Yak-List |
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jan.mevis(at)informavia.b
Guest
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| Posted: Wed Nov 08, 2006 9:46 pm Post subject: Yak 50 radio |
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|
Thanks, Mark!
The point where the radio gets its supply is at a three-connector place just behind the throttle, almost next to the air valve. That’s where I measure. The push-to-talk wires go also to one of these points. From this three-connector point the power feed then disappears in a big bunch of cables.
From your explanation, I conclude that there must be a bad wire, making false contacts. Perhaps it’s the switch itself on the front panel? Might be dangerous too, I suppose. I’ll use your method with a light bulb, much easier than with a multi-meter.
Jan
RA2005K
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 november 2006 23:41
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
Sure....
You've got some resistance on the wire between the radio and the battery. That is assuming that you have the radio connected, and are measuring the voltage from some point that feeds the radio. If you want to prove this premise, remove the radio from the mount, and then read the voltage again. If it jumps up to 28 volts with the radio removed, and drops to 3 volts with the radio installed, that is without a doubt... your problem. To find the problem, simply take your voltmeter (with the radio installed) and start working backwards towards the battery/power source. When it goes from 3 back up to 28, the problem is in the middle between those two points.
You can also remove the radio, and connect a light bulb (28 volt) from the power pin to ground. It will light dimly if at all. Go back and start jiggling everything. When the light comes on brightly, you have wiggled the right thing! The old light bulb trick is handy in all manner of applications. Shorts AND opens....
For clarification, it would be nice to know where you are measuring the radio voltage from, etc. But ASSUMING (dangerous thing to do) that you are measuring it with the radio installed, and are reading it from a known point that for SURE feeds the radio... then the method described above will work without question.
Good luck,
Mark Bitterlich
N50YK
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, November 08, 2006 1:39
To: yak-list(at)matronics.com
Subject: Yak 50 radio
Hi all,
I replaced my old ZIABRIK radio by a new BRIZ (which works perfectly, tested in a lab). But when installed, it sometimes works, sometimes does not.
I discovered that I only have 3 volts on the supply wire when switching on the “radio” button on the front panel. First I thought it was the battery, but I checked it, and it’s in perfect shape.
One of the symptoms : I hear some “clicking” or “ticking” in the headset, and usually after 3 to 4 minutes, it switches on. As if one or another relay tries to switch on ?
It’s definitely not the new radio, since I am using a provisional bypass, connecting it immediately to the battery – until the problem is solved. The problem is not introduced with the new radio either, since with the old radio, I had the same problem. This is the reason why I was forced to replace the old radio (thinking it was dead).
Any idea ?
Best regards,
Jan Mevis
Yak 50 RA2005K | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.comhref="http://www.buildersbooks.com">www.buildersbooks.comhref="http://www.kitlog.com">www.kitlog.comhref="http://www.homebuilthelp.com">www.homebuilthelp.comhref="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List |
0123456789 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
0 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
1 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
2 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
3 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
4 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
5 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
6 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
7 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
8 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
9 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
0 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
1 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
2 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
3
[quote][b]
| | - The Matronics Yak-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:
http://www.matronics.com/Navigator?Yak-List |
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mark.bitterlich(at)navy.m
Guest
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| Posted: Thu Nov 09, 2006 3:05 pm Post subject: Yak 50 radio |
|
|
I do not own a 52, but a 50. I don't really know the 52 very well, but
I will assume you are at the right place!
Put a meter on the test point junction you described. Pull the actual
R/T and see if the voltage jumps up to 28 volts. If it does, then the
problem is between your junction and the source of power. Sure, the
switch could indeed be bad.
Put radio back in.
Turn the switch off.
Make sure power go to zero volts at your test point.
Now run a wire right to any 28 volt source ... such as straight from the
battery.
Be safe and put in a 10 amp circuit breaker in line somehow.
Hook that new wire to your test point described. See if radio now works
perfectly.
This will confirm the issue.
Remove test wire.
TUrn switch off
hook light bulb from test point to ground.
Turn on switch
Light bulb comes on very dimly. (assuming it is not some tiny weenie
bulb)
now go jiggling wires and switches.
When bulb gets really bright.. you found it!
Best of luck again.
mark
CONFIDENTIALITY NOTICE: This e-mail message, including any attachments,
is for the sole use of the intended recipient(s) and may contain
information, which is confidential to, and/or priviledge in favor of
NATEC and its affiliates or customers. If you are not the intended
recipient, please contact the sender by reply e-mail and destroy all
copies of the original message and any attachments. Thank you.
________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Thursday, November 09, 2006 0:45
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
Thanks, Mark!
The point where the radio gets its supply is at a three-connector place
just behind the throttle, almost next to the air valve. That's where I
measure. The push-to-talk wires go also to one of these points. From
this three-connector point the power feed then disappears in a big bunch
of cables.
| Quote: | From your explanation, I conclude that there must be a bad wire, making
false contacts. Perhaps it's the switch itself on the front panel?
|
Might be dangerous too, I suppose. I'll use your method with a light
bulb, much easier than with a multi-meter.
Jan
RA2005K
________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 november 2006 23:41
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
Sure....
You've got some resistance on the wire between the radio and the
battery. That is assuming that you have the radio connected, and are
measuring the voltage from some point that feeds the radio. If you want
to prove this premise, remove the radio from the mount, and then read
the voltage again. If it jumps up to 28 volts with the radio removed,
and drops to 3 volts with the radio installed, that is without a
doubt... your problem. To find the problem, simply take your voltmeter
(with the radio installed) and start working backwards towards the
battery/power source. When it goes from 3 back up to 28, the problem is
in the middle between those two points.
You can also remove the radio, and connect a light bulb (28 volt) from
the power pin to ground. It will light dimly if at all. Go back and
start jiggling everything. When the light comes on brightly, you have
wiggled the right thing! The old light bulb trick is handy in all
manner of applications. Shorts AND opens....
For clarification, it would be nice to know where you are measuring the
radio voltage from, etc. But ASSUMING (dangerous thing to do) that you
are measuring it with the radio installed, and are reading it from a
known point that for SURE feeds the radio... then the method described
above will work without question.
Good luck,
Mark Bitterlich
N50YK
________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, November 08, 2006 1:39
To: yak-list(at)matronics.com
Subject: Yak 50 radio
Hi all,
I replaced my old ZIABRIK radio by a new BRIZ (which works perfectly,
tested in a lab). But when installed, it sometimes works, sometimes does
not.
I discovered that I only have 3 volts on the supply wire when switching
on the "radio" button on the front panel. First I thought it was the
battery, but I checked it, and it's in perfect shape.
One of the symptoms : I hear some "clicking" or "ticking" in the
headset, and usually after 3 to 4 minutes, it switches on. As if one or
another relay tries to switch on ?
It's definitely not the new radio, since I am using a provisional
bypass, connecting it immediately to the battery - until the problem is
solved. The problem is not introduced with the new radio either, since
with the old radio, I had the same problem. This is the reason why I was
forced to replace the old radio (thinking it was dead).
Any idea ?
Best regards,
Jan Mevis
Yak 50 RA2005K
href="http://www.aeroelectric.com">www.aeroelectric.com
href="http://www.buildersbooks.com">www.buildersbooks.com
href="http://www.kitlog.com">www.kitlog.com
href="http://www.homebuilthelp.com">www.homebuilthelp.com
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
| | - The Matronics Yak-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:
http://www.matronics.com/Navigator?Yak-List |
|
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|
| Back to top |
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|
jan.mevis(at)informavia.b
Guest
|
| Posted: Thu Nov 09, 2006 9:42 pm Post subject: Yak 50 radio |
|
|
My plane, RA2005K, is a Yak 50 too!
I will do exactly as you describe it.
Thanks !
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
Sent: vrijdag 10 november 2006 0:04
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
I do not own a 52, but a 50. I don't really know the 52 very well, but I will assume you are at the right place!
Put a meter on the test point junction you described. Pull the actual R/T and see if the voltage jumps up to 28 volts. If it does, then the problem is between your junction and the source of power. Sure, the switch could indeed be bad.
Put radio back in.
Turn the switch off.
Make sure power go to zero volts at your test point.
Now run a wire right to any 28 volt source .. such as straight from the battery.
Be safe and put in a 10 amp circuit breaker in line somehow.
Hook that new wire to your test point described. See if radio now works perfectly.
This will confirm the issue.
Remove test wire.
TUrn switch off
hook light bulb from test point to ground.
Turn on switch
Light bulb comes on very dimly. (assuming it is not some tiny weenie bulb)
now go jiggling wires and switches.
When bulb gets really bright.. you found it!
Best of luck again.
mark
CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain information, which is confidential to, and/or priviledge in favor of NATEC and its affiliates or customers. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message and any attachments. Thank you.
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Thursday, November 09, 2006 0:45
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
Thanks, Mark!
The point where the radio gets its supply is at a three-connector place just behind the throttle, almost next to the air valve. That’s where I measure. The push-to-talk wires go also to one of these points. From this three-connector point the power feed then disappears in a big bunch of cables.
From your explanation, I conclude that there must be a bad wire, making false contacts. Perhaps it’s the switch itself on the front panel? Might be dangerous too, I suppose. I’ll use your method with a light bulb, much easier than with a multi-meter.
Jan
RA2005K
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 november 2006 23:41
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
Sure....
You've got some resistance on the wire between the radio and the battery. That is assuming that you have the radio connected, and are measuring the voltage from some point that feeds the radio. If you want to prove this premise, remove the radio from the mount, and then read the voltage again. If it jumps up to 28 volts with the radio removed, and drops to 3 volts with the radio installed, that is without a doubt... your problem. To find the problem, simply take your voltmeter (with the radio installed) and start working backwards towards the battery/power source. When it goes from 3 back up to 28, the problem is in the middle between those two points.
You can also remove the radio, and connect a light bulb (28 volt) from the power pin to ground. It will light dimly if at all. Go back and start jiggling everything. When the light comes on brightly, you have wiggled the right thing! The old light bulb trick is handy in all manner of applications. Shorts AND opens....
For clarification, it would be nice to know where you are measuring the radio voltage from, etc. But ASSUMING (dangerous thing to do) that you are measuring it with the radio installed, and are reading it from a known point that for SURE feeds the radio... then the method described above will work without question.
Good luck,
Mark Bitterlich
N50YK
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, November 08, 2006 1:39
To: yak-list(at)matronics.com
Subject: Yak 50 radio
Hi all,
I replaced my old ZIABRIK radio by a new BRIZ (which works perfectly, tested in a lab). But when installed, it sometimes works, sometimes does not.
I discovered that I only have 3 volts on the supply wire when switching on the “radio” button on the front panel. First I thought it was the battery, but I checked it, and it’s in perfect shape.
One of the symptoms : I hear some “clicking” or “ticking” in the headset, and usually after 3 to 4 minutes, it switches on. As if one or another relay tries to switch on ?
It’s definitely not the new radio, since I am using a provisional bypass, connecting it immediately to the battery – until the problem is solved. The problem is not introduced with the new radio either, since with the old radio, I had the same problem. This is the reason why I was forced to replace the old radio (thinking it was dead).
Any idea ?
Best regards,
Jan Mevis
Yak 50 RA2005K | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.comhref="http://www.buildersbooks.com">www.buildersbooks.comhref="http://www.kitlog.com">www.kitlog.comhref="http://www.homebuilthelp.com">www.homebuilthelp.comhref="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List |
0123456789 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
0 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
1 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
2 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
3 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
4 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
5 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
6 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
7 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
8 | Quote: | | href="http://www.aeroelectric.com">www.aeroelectric.com |
9 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
0 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
1 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
2 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
3 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
4 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
5 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
6 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
7 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
8 | Quote: | | href="http://www.buildersbooks.com">www.buildersbooks.com |
9 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
0 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
1 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
2 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
3 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
4 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
5 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
6 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
7 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
8 | Quote: | | href="http://www.kitlog.com">www.kitlog.com |
9 | Quote: | | href="http://www.homebuilthelp.com">www.homebuilthelp.com |
0 | Quote: | | href="http://www.homebuilthelp.com">www.homebuilthelp.com |
1 | Quote: | | href="http://www.homebuilthelp.com">www.homebuilthelp.com |
2 | Quote: | | href="http://www.homebuilthelp.com">www.homebuilthelp.com |
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5 | Quote: | | href="http://www.homebuilthelp.com">www.homebuilthelp.com |
6
[quote][b]
| | - The Matronics Yak-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:
http://www.matronics.com/Navigator?Yak-List |
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mark.bitterlich(at)navy.m
Guest
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| Posted: Mon Nov 13, 2006 9:02 am Post subject: Yak 50 radio |
|
|
There is a general rules that applies to this problem and all other
electrical type problems either in airplanes or anyplace else.
1. If any human hand has been messing with anything in the aircraft
anywhere NEAR where you now have a problem, look there FIRST.
2. Always look at something that "moves" first... before anything else,
when investigating a problem.
Switches, relays, etc., all "move". So do any wiring bundles that could
flex in flight. The Radio does not have an on/off switch, so it is
unlikely to be the radio itself causing this problem if the problem is
exactly as you have reported it.
Best of luck,
Mark Bitterlich
________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Friday, November 10, 2006 0:41
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
My plane, RA2005K, is a Yak 50 too!
I will do exactly as you describe it.
Thanks !
________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: vrijdag 10 november 2006 0:04
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
I do not own a 52, but a 50. I don't really know the 52 very well, but
I will assume you are at the right place!
Put a meter on the test point junction you described. Pull the actual
R/T and see if the voltage jumps up to 28 volts. If it does, then the
problem is between your junction and the source of power. Sure, the
switch could indeed be bad.
Put radio back in.
Turn the switch off.
Make sure power go to zero volts at your test point.
Now run a wire right to any 28 volt source ... such as straight from the
battery.
Be safe and put in a 10 amp circuit breaker in line somehow.
Hook that new wire to your test point described. See if radio now works
perfectly.
This will confirm the issue.
Remove test wire.
TUrn switch off
hook light bulb from test point to ground.
Turn on switch
Light bulb comes on very dimly. (assuming it is not some tiny weenie
bulb)
now go jiggling wires and switches.
When bulb gets really bright.. you found it!
Best of luck again.
mark
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________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Thursday, November 09, 2006 0:45
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
Thanks, Mark!
The point where the radio gets its supply is at a three-connector place
just behind the throttle, almost next to the air valve. That's where I
measure. The push-to-talk wires go also to one of these points. From
this three-connector point the power feed then disappears in a big bunch
of cables.
| Quote: | From your explanation, I conclude that there must be a bad wire, making
false contacts. Perhaps it's the switch itself on the front panel?
|
Might be dangerous too, I suppose. I'll use your method with a light
bulb, much easier than with a multi-meter.
Jan
RA2005K
________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 november 2006 23:41
To: yak-list(at)matronics.com
Subject: RE: Yak 50 radio
Sure....
You've got some resistance on the wire between the radio and the
battery. That is assuming that you have the radio connected, and are
measuring the voltage from some point that feeds the radio. If you want
to prove this premise, remove the radio from the mount, and then read
the voltage again. If it jumps up to 28 volts with the radio removed,
and drops to 3 volts with the radio installed, that is without a
doubt... your problem. To find the problem, simply take your voltmeter
(with the radio installed) and start working backwards towards the
battery/power source. When it goes from 3 back up to 28, the problem is
in the middle between those two points.
You can also remove the radio, and connect a light bulb (28 volt) from
the power pin to ground. It will light dimly if at all. Go back and
start jiggling everything. When the light comes on brightly, you have
wiggled the right thing! The old light bulb trick is handy in all
manner of applications. Shorts AND opens....
For clarification, it would be nice to know where you are measuring the
radio voltage from, etc. But ASSUMING (dangerous thing to do) that you
are measuring it with the radio installed, and are reading it from a
known point that for SURE feeds the radio... then the method described
above will work without question.
Good luck,
Mark Bitterlich
N50YK
________________________________
From: owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, November 08, 2006 1:39
To: yak-list(at)matronics.com
Subject: Yak 50 radio
Hi all,
I replaced my old ZIABRIK radio by a new BRIZ (which works perfectly,
tested in a lab). But when installed, it sometimes works, sometimes does
not.
I discovered that I only have 3 volts on the supply wire when switching
on the "radio" button on the front panel. First I thought it was the
battery, but I checked it, and it's in perfect shape.
One of the symptoms : I hear some "clicking" or "ticking" in the
headset, and usually after 3 to 4 minutes, it switches on. As if one or
another relay tries to switch on ?
It's definitely not the new radio, since I am using a provisional
bypass, connecting it immediately to the battery - until the problem is
solved. The problem is not introduced with the new radio either, since
with the old radio, I had the same problem. This is the reason why I was
forced to replace the old radio (thinking it was dead).
Any idea ?
Best regards,
Jan Mevis
Yak 50 RA2005K
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