WELL! Now I've done it!

Richard Arland, K7SZ richard.arland at VERIZON.NET
Sat Jul 8 16:21:19 EDT 2006


I was minding my own business, soldering 4-40 nuts on to the OSC coils of my new TRC-77A prior to aligning the transmitter section. The coil slugs were very, very tight, so I used a trick from Mark Francis' book, Mil Spec Radio Gear.

Once I rounded out the #1 coil hole (the slug was off-center so I had to round out the hole a bit prior to soldering the nut in place) I soldered all 6 of the 4-40 nuts on the very ends of the coil slug screws using an 80 W iron (makes quick work of this and PL-259 coaxial connectors!).

Then I used a small Xcelite nut driver to try turning the slugs. #5 & 6 turned just fine. I brok off #3 & 4! They twisted right off with out any warning. #2 is very tight, and I don't want to twist it off like the other two. #1 coil adjusts just fine. 

So, now I am down to a three channel radio (on the transmit side, anyway) and I need some guidance. 

Does anyone have the proper adjustable coils to replace the two that are broken? Is there a ready source of these coils (having a 2nd TRC-77A not withstanding!). Since I can't find the TM for the 77A (it's here somewhere I just have to find the proper pile of "stuff") I can't give you all the proper coil specs. 

This is definately one of those days I should have stayed in bed. 

73 Rich K7SZ

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