 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
CardinalNSB(at)aol.com
Guest
|
 Posted: Tue Dec 05, 2006 6:24 am Post subject: RG 400 into Molex crimp terminal, best way? |
 |
|
I need to bring RG400 marker beacon coax into my PS Eng., audio panel using a "Molex" crimp terminal on the coax. This seems like a mismatch sizewise.
(I believe it is a Molex K.K. .156 Terminal Connectors (crimp pins), P/N 08-05-0302, Mouser P/N 538-08-05-0302, .33-cents each, looks the same as the crimp pins for the Narco Mk12D and King KNS-80 and KI-206, the King part number is KPN-030-1107-30. Can anyone verify this is the correct Molex number, the measurements match what I have.)
1. What is the best way to connect the RG400 to the Molex crimp terminal?
a. Crimp the center conductor to Molex crimp terminal, if so the insulation around the center connector is pretty large, do I simply trim it to #18 size for the insulation crimp? I have been unsuccessful in obtaining a good crimp on the RG400 and end up with a fragile connection. There isn't room to add heat shrink to stiffen it up, since the crimp is a tight fit in the connector box.
I assume coax is generally designed for the bnc type connectors and that center conductor flexability is not usually an issue.
b. Crimp or solder a short length of #18 to the center conductor for ease of crimping the #18 to the Molex crimp terminal? Stabilize the joint with heat shrink.
c. Strip back the center conductor about an inch, put some heat shrink on the center conductor for better grip by the Molex on the insulation?
d. Is there an alternate coax that is more crimp friendly, to create a pigtail that connects to the RG400?
I prefer to avoid extra connections (in general), and with my service loop (coax bundled with intercom/mike/speaker wires) and mounting position I don't forsee needing to disconnect the marker beacon coax for future addition/deletions of avionics from the audio panel.
e. Other ideas?
3. I have tried crimping these with the "changeable jaw" crimper, not pretty. It's probably my lack of technique, but can anyone recommend a user friendly crimper-ebay has "Molex HTR1031E Crimp Tool" is this the right tool for these Molex crimp terminals?
I couldn't find anything on the archives, my apologies if I missed it.
Thanks for any help, and Bob thanks for the reply on the alternator wiring, I now understand the function of the extra A+ wire. Sincerely, Skip Simpson
[quote][b]
| | - The Matronics AeroElectric-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?AeroElectric-List |
|
|
|
| Back to top |
|
 |
stein(at)steinair.com
Guest
|
| Posted: Tue Dec 05, 2006 7:44 am Post subject: RG 400 into Molex crimp terminal, best way? |
|
|
Best practice is not to wire the RG-400 directly into the connector, but rather to use something like AWG20 on the center conductor, put a solder sleeve over the shield with a pigtail of another AWG20 then run the two wires into the connector - and of course support the coax so it does't rip out the wires. You can see a picture of our typical Mkr Bcn pigtail here: http://www.steinair.com/images/store/MKR.jpg We have a black/white strip for the ctr conductor and a black wire for the shield (which is kind of hidden in the picture).
Hope that helps.
Cheers,
Stein.
[quote] -----Original Message-----
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com]On Behalf Of CardinalNSB(at)aol.com
Sent: Tuesday, December 05, 2006 8:23 AM
To: aeroelectric-list(at)matronics.com
Subject: RG 400 into Molex crimp terminal, best way?
I need to bring RG400 marker beacon coax into my PS Eng., audio panel using a "Molex" crimp terminal on the coax. This seems like a mismatch sizewise.
(I believe it is a Molex K.K. .156 Terminal Connectors (crimp pins), P/N 08-05-0302, Mouser P/N 538-08-05-0302, .33-cents each, looks the same as the crimp pins for the Narco Mk12D and King KNS-80 and KI-206, the King part number is KPN-030-1107-30. Can anyone verify this is the correct Molex number, the measurements match what I have.)
1. What is the best way to connect the RG400 to the Molex crimp terminal?
a. Crimp the center conductor to Molex crimp terminal, if so the insulation around the center connector is pretty large, do I simply trim it to #18 size for the insulation crimp? I have been unsuccessful in obtaining a good crimp on the RG400 and end up with a fragile connection. There isn't room to add heat shrink to stiffen it up, since the crimp is a tight fit in the connector box.
I assume coax is generally designed for the bnc type connectors and that center conductor flexability is not usually an issue.
b. Crimp or solder a short length of #18 to the center conductor for ease of crimping the #18 to the Molex crimp terminal? Stabilize the joint with heat shrink.
c. Strip back the center conductor about an inch, put some heat shrink on the center conductor for better grip by the Molex on the insulation?
d. Is there an alternate coax that is more crimp friendly, to create a pigtail that connects to the RG400?
I prefer to avoid extra connections (in general), and with my service loop (coax bundled with intercom/mike/speaker wires) and mounting position I don't forsee needing to disconnect the marker beacon coax for future addition/deletions of avionics from the audio panel.
e. Other ideas?
3. I have tried crimping these with the "changeable jaw" crimper, not pretty. It's probably my lack of technique, but can anyone recommend a user friendly crimper-ebay has "Molex HTR1031E Crimp Tool" is this the right tool for these Molex crimp terminals?
I couldn't find anything on the archives, my apologies if I missed it.
Thanks for any help, and Bob thanks for the reply on the alternator wiring, I now understand the function of the extra A+ wire. Sincerely, Skip Simpson
| 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/contribution">http://www.matronics.com/chref="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List
|
[b]
| | - The Matronics AeroElectric-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?AeroElectric-List |
|
|
|
| Back to top |
|
|
wf-k(at)mindspring.com
Guest
|
| Posted: Tue Dec 05, 2006 8:22 am Post subject: RG 400 into Molex crimp terminal, best way? |
|
|
I loved the way you did your wire marking. Is that available at Steinair? What is the part number?
Dave Henderson RV-7
N925LW (Lord Willing)
--
| | - The Matronics AeroElectric-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?AeroElectric-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
