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1950 Emerson TV resurrection attempt
#29

I needed to loosen the HV tube socket, so that meant removing the 1B3. The getter looked ok, so I'll reuse the tube. I can replace if needed by simply removing the top of the HV box. Well, here's what happened next: SNAP!

   

So, after replacing the cap and HV tube plate connector.

   

The cleanup and tube testing:

   

Done! All cleaned up, tubes tested and back in their proper sockets, time to do a test. I did find a couple weak 12AU7A tubes, but if they work ok - I'm leaving them. Just making a note. All others tested and all original Emerson tubes except the horizontal output 25L6 tube, which was a GE.

   

Turned out quite nice! Or DID it??? So, time for a power up and some adjustments. Power applied - and - NOTHING! Tubes light, DEAD otherwise! What?! So I flip the chassis and power up to make some checks and look for smoke. Nothing! B+? Yup! HV? Yup, nice solid 5kv. No sound, no light on the screen! Turn off and set up for more checks, power up and - even NOTHINGER! (Not a word I know), but follow me. Ok, so this time only half my tubes were lighting up. Wiggle, shake, tap - nothing, so test time. After about the 6th tube I found the heater on a 12AU7 open. Dang! I NEED that inrush limiter! May just have to tolerate some hum to keep my tubes alive. Was that the problem? Nope! Still nothing! No buzz in the sound when I touch the volume control, no light on the screen, all tubes have plate and screen voltages. Dead - dead - dead. . What did I DO? I've been here before - with a decent working something or other, then clean and check and it quits! Sometimes I think it is better to clean what you can and leave it alone! Well, stay tuned 'cause this set WILL come back to life if I have to bring it back one tube at a time!

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
1950 Emerson TV resurrection attempt - by TV MAN - 03-26-2023, 09:47 PM
RE: 1950 Emerson TV resurrection attempt - by TV MAN - 02-09-2025, 01:40 AM



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