[Hammarlund] C28 mistake in most HQ-180 manuals
Bob Young
bobyoung53 at hotmail.com
Tue Dec 19 22:13:30 EST 2023
I've been trying to align my HQ-180A for at least a week now and could not find C28 (says to inject the 60 KHz signal between C28 and T5 (C155) for the IF, my 180 manual and a 180A manual says C28 is a .01 uf ceramic cap, but the Feb 1970, issue 4 manual lists it as a 7 pf mica which is what it is in my radio. I don't know if my radio is a late one with a change or not, I don't think so though, it's serial number 3063xxxx. I have two copies of the 'TECHNICAL DESCRIPTION TEST AND OPERATING INSTRUCTIONS' and only the Feb 1970 version has it listed correctly. I'm hoping this can save someone else from beating their head against the wall looking for a non-existing cap. I'm going to try the alignment directions in it, it also included 455 KHz, I tried it once before and got nothing but probably because 60 KHz was incorrect. Hopefully I'll find out tomorrow if I can finish it.
I have a 180 in storage I'm going to pull that out when I have some time and see what it has for C28.
Bob
KB1OKL
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