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Hammarlund HQ-129-X
#2

Yesterday, I pulled the chassis out of the cabinet.

   

Turning it upside down, I wasn't sure what I would find...

   

As you can see, most - not all, but most - of the original paper capacitors have been replaced with new yellow film caps. The quality of the cap replacements is not quite to my liking, but I may leave most if not all of them alone.

There are some issues I will need to address, though:

   

I don't care for how the original twist-lock electrolytic was replaced by individual electrolytics with some masking tape wrapped around them. These will be replaced with another twist-lock unit. I considered buying a new twist-lock from AES, but have since decided to open up a twist-lock from the junkpile and restuff it with new Nichicon electrolytics.

   

Left side of chassis, looking at the bottom: No less than seven original paper capacitors which were not replaced. I will replace them. Since the vast majority of capacitors were replaced with yellow film and the originals discarded, I will not restuff these either.

   

Back of chassis under speaker terminals: Two more original paper capacitors. One of those, .05 uF, is connected between one side of the line and ground! Icon_eek It will be replaced with a new .01 uF X-Y safety cap. The other will be replaced with a new .047 uF yellow film capacitor.

Additionally, I noticed that R54, which is supposed to be 4K at 5 watts, was replaced with a 10K, 10W unit. That will reduce the B+ to the screen grids of the front end tubes as well as the first and second IF amplifiers. It will be replaced with a new 4K, 10 watt resistor which I just happen to have on hand.

Also, it appears to have its original rubber power cord which is cracking. It will receive a brand new black power cord.

All of the tubes are good save two: the 6K8GT which is marginal, and the 0C3 voltage regulator tube which my tester won't test. Its base is very loose so I'll just replace it anyway.

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
Hammarlund HQ-129-X - by Ron Ramirez - 08-28-2019, 06:33 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 08-28-2019, 06:45 PM
RE: Hammarlund HQ-129-X - by rfeenstra - 08-28-2019, 07:42 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 08-28-2019, 07:49 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-01-2019, 09:14 PM
RE: Hammarlund HQ-129-X - by John Bartley - 09-02-2019, 08:27 AM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-02-2019, 07:38 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-02-2019, 07:42 PM
RE: Hammarlund HQ-129-X - by mikethedruid - 09-02-2019, 07:49 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-02-2019, 09:29 PM
RE: Hammarlund HQ-129-X - by Paul Philco322 - 09-02-2019, 09:48 PM
RE: Hammarlund HQ-129-X - by mikethedruid - 09-03-2019, 12:04 AM
RE: Hammarlund HQ-129-X - by Eliot Ness - 09-03-2019, 01:03 AM
RE: Hammarlund HQ-129-X - by EdHolland - 09-04-2019, 02:12 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-14-2019, 08:58 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-14-2019, 09:07 PM
RE: Hammarlund HQ-129-X - by Radioroslyn - 09-14-2019, 09:19 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-14-2019, 09:22 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-14-2019, 10:46 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-14-2019, 10:47 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-15-2019, 05:53 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-15-2019, 07:44 PM
RE: Hammarlund HQ-129-X - by Paul Philco322 - 09-15-2019, 08:09 PM
RE: Hammarlund HQ-129-X - by Simon Wa3uay - 09-15-2019, 08:22 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-15-2019, 09:26 PM
RE: Hammarlund HQ-129-X - by Simon Wa3uay - 09-16-2019, 04:44 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-17-2019, 06:56 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-17-2019, 07:03 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-19-2019, 10:00 PM
RE: Hammarlund HQ-129-X - by EdHolland - 09-20-2019, 01:47 PM
RE: Hammarlund HQ-129-X - by Simon Wa3uay - 09-20-2019, 07:10 PM
RE: Hammarlund HQ-129-X - by rfeenstra - 09-20-2019, 08:51 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-20-2019, 10:43 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-21-2019, 07:57 PM
RE: Hammarlund HQ-129-X - by rfeenstra - 09-21-2019, 08:10 PM
RE: Hammarlund HQ-129-X - by Simon Wa3uay - 09-22-2019, 07:06 PM
RE: Hammarlund HQ-129-X - by Ron Ramirez - 09-23-2019, 09:21 AM
RE: Hammarlund HQ-129-X - by kj0002 - 01-05-2020, 09:34 PM
RE: Hammarlund HQ-129-X - by Paul Philco322 - 01-05-2020, 09:55 PM



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