General Electric H-77

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General Electric H-77

Post by terrydec on Sat Mar 03, 2018 4:05 pm

Sherlock Holmes said, "When you remove the impossible, what's left, no matter how improbable, is the answer."

I spent a lot of time restoring and repairing this nice console radio.  I got it working, but one day it just stopped.  All of my tests ended up at the converter tube, 6SA7.  However, that was a NOS tube I got from eBay, so it couldn't be bad.  Today I dug deep in my closet and pulled out my old tube tester.  When I went to check the amp function, it was stone cold dead. I did not see that coming!  I just ordered a replacement.  Another NOS, (I hope).

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Re: General Electric H-77

Post by terrydec on Fri Mar 09, 2018 12:55 am

Oops.  It wasn't the tube.   Arrgghh!!  I hate this!  Sad Sad
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Re: General Electric H-77

Post by terrydec on Fri Mar 09, 2018 8:29 pm

Hint- Test ALL of the tubes.
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Re: General Electric H-77

Post by Bill Cahill on Sat Mar 10, 2018 7:32 pm

Guys, I moved this topic to radios because that's what it's about. I left a shadow in clubhouse for easy finding.
Bill Cahill

Very interesting project.
question; Did you mean 5Y3? The tube you mentioned uses a four pin socket.

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Re: General Electric H-77

Post by terrydec on Sat Mar 10, 2018 11:08 pm

I think the problem is the 6SK7 IF amplifier. It didn't pass the tube tester test. I've ordered a couple from eBay. I am REALLY dedicated to getting this working. I have put a LOT of time and effort into it, plus a lot of money.
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Re: General Electric H-77

Post by terrydec on Mon Mar 12, 2018 4:46 pm

IT WORKS!!!!!
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Re: General Electric H-77

Post by terrydec on Mon Mar 12, 2018 8:52 pm

Now I have a spare 6SA7 and 6SK7. Good.

Let me repeat myself----
IT WORKS!!
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Re: General Electric H-77

Post by Tony V on Mon Mar 12, 2018 10:02 pm

Awesome!
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Re: General Electric H-77

Post by Bill Cahill on Tue Mar 13, 2018 1:03 am

Congradulations!!! Glad to hear it..............

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Re: General Electric H-77

Post by terrydec on Tue Mar 20, 2018 1:23 am

You won't believe this-

My friend in California just bought this radio for $300 plus shipping. I'm gonna miss it. Obviously I have to ship it by truck. If anybody has any good suggestions in this direction, I would really appreciate it.

$300. Wow!
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Re: General Electric H-77

Post by terrydec on Wed Mar 21, 2018 11:47 pm

What would cause hum only when a station is tuned in? This is before the volume control. In between stations the set is virtually silent.
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Re: General Electric H-77

Post by terrydec on Wed May 23, 2018 12:01 am

I love this set.
(More like love/hate.)
It has developed a new problem.  For awhile, mostly when it first turns on, the sound will be muted.  When I switch the bandswitch back and forth, it comes back.  I have to do this two or three times, then it plays fine.  I don't think it's the switch, but I'm going to let it ride for awhile.  I've already rebuilt the front end.  I can live with getting up to flip the switch.
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Re: General Electric H-77

Post by Tony V on Wed May 23, 2018 1:05 pm

The bandswitch might be dirty and may need to be cleaned.
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Re: General Electric H-77

Post by terrydec on Wed May 23, 2018 2:36 pm

Tony V wrote:The bandswitch might be dirty and may need to be cleaned.

That's probably true.
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Re: General Electric H-77

Post by terrydec on Sat Jun 02, 2018 11:30 pm

The never ending story-

I drug the thing out of the cabinet again, which always includes the "Beam-o-scope." It has push buttons. I hate push buttons. It has five presets, which I actually tried to set once. Good luck. A TV/Phono button and a bandswitch. There is either a dirty contact or weak leaf somewhere. And of course it is intermittent. I really hate that. When I press any other switch and back to manual, it works. Arrrggghh.
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Re: General Electric H-77

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