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Author Topic: 4-prong bias plug for Thunderbolt  (Read 5884 times)
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wa2dtw
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« on: January 29, 2006, 02:54:41 PM »
Hi
Does anyone know where I can obtain a 4-prong plug that fits the bias jack on the back of the Thunderbolt?  I thought I had one, but the prongs are too thick.
Many thanks and 73
Steve WA2DTW
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w3jn
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« Reply #1 on: January 30, 2006, 06:55:13 AM »
post a photo, many of us have tons of odd connectors in the ol' junkbox.  I've never had a T-bolt so I wouldn't know it if it bit me.

73 John
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wa2dtw
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« Reply #2 on: January 30, 2006, 02:09:54 PM »
Thanks, John
Here it is.  I hope it works.



73
Steve

* thunderbolt jack.JPG (188.4 KB, 357x480 - viewed 520 times.)
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wa2dtw
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« Reply #3 on: January 30, 2006, 02:15:22 PM »

The dimensions, to the best of my measuring, seem to be
pins 1-2 3/8" (or 80mm?)
pins 1-4 3/8" (or 80mm?)
pins 3-4 3/8"  (or 80 mm?)
pins 2-3 5/16" (or 60mm?)

Thanks again and 73
Regards
Steve
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w3jn
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« Reply #4 on: January 30, 2006, 03:10:01 PM »
Looks familiar, I'll check the junkbox tonite.

73 John
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w3jn
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« Reply #5 on: January 31, 2006, 07:12:49 AM »
Sorry, came up dry.  I probably have one somewhere, just a matter of finding it.  If I do, it's yours.

73 John
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Pete, WA2CWA
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« Reply #6 on: January 31, 2006, 05:29:34 PM »
Lafayette, and probably others, used the five pin version on their early tube CB's. Lots of time you can find the matching mike with the five pin plug on it at a hamfest. If you line up the five pin plug with your 4 pin socket, you can see quickly which pin to cut off. Lafayette HE-15, HE-20A/B/C, HB-111, 200, 222, 333, HE-35(I think), HE-45 series all used the 5 pin version. The 3, 4, 5, and I think there was a 6 pin version were also used on some 50's and 60's audio equipment.
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Pete, WA2CWA - "A Cluttered Desk is a Sign of Genius"
w3jn
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« Reply #7 on: January 31, 2006, 06:58:05 PM »
I have a TON of those 5 pin connectors - lemme know if you want one.  I have ones with the pin in the middle and 5 around the perimeter.

73 John
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WD4TC
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« Reply #8 on: February 01, 2006, 02:11:45 AM »
  Steve, I think I know where one is,I got to get with a friend who needed  one and he found 2 or 3 and I will see if I can get you 1  Tim..... WD4TC
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Tim...WD4TC 
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wa2dtw
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« Reply #9 on: February 01, 2006, 02:59:24 PM »
Many thanks, Tim
Please let me know.
73
Steve
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