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

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

General Television - unknown model
#7

I have been slowly working away on this radio. I was initially thrown by the unusual power cord arrangement. It looks like there are too many wires. Its not a curtain burner resistance wire (the extra brown wire with the tape on the end) but I think it was part of the antenna loop. The loop or whatever it was part of is long gone so the only antenna now is the external antenna connection.
[Image: https://www.dropbox.com/s/2r4676d9fyz4li....jpg?raw=1]

Some of the other General Television radio schematics do have a power cord antenna system but I could not find a schematic with this tube layout and the power cord antenna. The model 19 and 52 schematic is for the most part correct for the radio although I primarly simply replaced resistors and caps with the values that were in the set already.
[Image: https://www.dropbox.com/s/167p5vnail04cu....jpg?raw=1]

After getting it back together and restringing the tuner it was playing although with extremely low volume. Even my SSTRAN broadcast was barely audible at full volume so I started going through the circuit wire by wire. Lo and behold one of the resistors was 150 ohms but should have been 500k. Swapping that out and it now plays normally Icon_smile

I'll now start working on the cabinet and doing a little more clean up. With a bit closer inspection I now know why that loose knob that went missing in the beginning. The set screw threads in the knob are stripped. I think I have three choices: a) find a new knob, b) drill and tap with a larger set screw or fill the existing hole in the knob (epoxy putty?) and drill and tap with the existing size set screw. Would appreciate any experiences anyone has had trying to fix a stripped set screw thread.


Messages In This Thread
RE: General Television - unknown model - by klondike98 - 01-28-2023, 09:55 PM
RE: General Television - unknown model - by David - 01-29-2023, 08:51 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

[-]
Who's Online
There are currently 1062 online users. [Complete List]
» 2 Member(s) | 1060 Guest(s)
AvatarAvatar

>