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Hickok model 600A resto
#8

I was a little confused about the English dial myself, but do know about the red dots. I am guessing that if I want to read the meter in mutual conductance, I set it to one of the dots within the range of what the chart calls for? And, that I use the "replace-?-good" reading I set to the number listed? Another question I had is about the Gm number; is this the minimum value for pass-fail?

I assume this tester has been idle for years, maybe decades. I havent really decided if any of the controls are dirty or if it is the way it operates. I made a few quick checks, but dont have the 1k per volt meter handy, so I used my Fluke 77. Plate B+ is really high, just under 200v, screen voltage is right on at about 131v. Reduced screen also on target at about 57v. Bias was a little off at -41v. Grid signal also right on at 2.5v ac. I know this may be off some due to not using the proper meter for some of the tests, but gives me an idea of whats there. Line control did seem a little flaky - seems to run high, but it will adjust with a tube in a socket for testing (6V6GT).

I pulled the cabinet to visually check over, and found the 83 tube replaced with silicon diodes (they did use a tube base), 5Y3 was in place. This could explain the abnormally high plate voltage and the flaky line adjustment. Still has an old E-cap across the meter. I saw where the english control had "been into", but it does seem to work fairly decent. This is as far as I have gotten. I also appreciate the link to get an updated tube chart. I noticed the lack of some newer tubes such as 6BQ5, 7591A.

Thanks for the replies so far.

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
Hickok model 600A resto - by TV MAN - 10-19-2014, 07:55 PM
RE: Hickok model 600A resto - by morzh - 10-19-2014, 09:39 PM
RE: Hickok model 600A resto - by tab10672 - 10-19-2014, 10:01 PM
RE: Hickok model 600A resto - by morzh - 10-20-2014, 08:35 AM
RE: Hickok model 600A resto - by John R - 10-20-2014, 10:39 AM
RE: Hickok model 600A resto - by thirtiesradio - 10-20-2014, 11:46 AM
RE: Hickok model 600A resto - by Alan Douglas - 10-20-2014, 06:29 PM
RE: Hickok model 600A resto - by TV MAN - 10-21-2014, 04:18 PM
RE: Hickok model 600A resto - by tab10672 - 10-21-2014, 05:29 PM
RE: Hickok model 600A resto - by thirtiesradio - 10-22-2014, 11:15 AM
RE: Hickok model 600A resto - by Phlogiston - 10-22-2014, 01:02 PM
RE: Hickok model 600A resto - by Alan Douglas - 10-22-2014, 04:09 PM
RE: Hickok model 600A resto - by TV MAN - 11-02-2014, 04:28 PM
RE: Hickok model 600A resto - by Mondial - 11-02-2014, 06:42 PM
RE: Hickok model 600A resto - by Alan Douglas - 11-03-2014, 03:18 PM
RE: Hickok model 600A resto - by wazz - 12-07-2014, 08:45 PM
RE: Hickok model 600A resto - by Alan Douglas - 12-09-2014, 08:22 PM
RE: Hickok model 600A resto - by morzh - 12-09-2014, 09:47 PM
RE: Hickok model 600A resto - by TV MAN - 12-11-2014, 10:36 AM
RE: Hickok model 600A resto - by Alan Douglas - 12-11-2014, 03:10 PM
RE: Hickok model 600A resto - by codefox1 - 01-03-2015, 11:14 AM
RE: Hickok model 600A resto - by morzh - 01-03-2015, 12:46 PM
RE: Hickok model 600A resto - by TV MAN - 01-12-2015, 08:15 PM
RE: Hickok model 600A resto - by John R - 01-13-2015, 01:33 PM
RE: Hickok model 600A resto - by TV MAN - 01-13-2015, 05:03 PM
RE: Hickok model 600A resto - by thirtiesradio - 01-14-2015, 12:07 AM
RE: Hickok model 600A resto - by TV MAN - 01-15-2015, 09:15 AM
RE: Hickok model 600A resto - by K7Sparky - 01-31-2015, 09:21 AM



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