Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM
6TPZ and 5TPO Radio Help
I suspect it's been repaired before. And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM
B&K 1077B no video
Thanks Rich! I'll take a look and see what he has. I know there's more modern equipment to be had, but this one I know a...TV MAN — 09:11 PM
B&K 1077B no video
Hello Tim, Here is a link to restoration of one on Phil's old radios site ! Sincerely Richard bk1077bradiorich — 09:01 PM
6TPZ and 5TPO Radio Help
I'm a little befuddled on this one. Should X5 and X4 be tied together like this?  It looks like someone added this at so...R3Sons — 07:33 PM

[-]
Who's Online
There are currently 8514 online users. [Complete List]
» 2 Member(s) | 8512 Guest(s)
AvatarAvatar

>