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

First Post on 37-620 restoration
#3

Thanks Codefox: I do have the schematic. I started replacing caps from the audio end first because I was waiting for my main filter caps. I've finished the audio and rf stages and am starting the power supply section now. So.... I can assume the schematic is correct and that is a 9K resistor?. This 37-620 is in a 37-650 cabinet. It looks like someone grafted the shadow meter from the old chassis on this one. I checked the circuit out and it looks like it might work. They removed the 10k resistor (R33) and put the shadowmeter leads there. That pretty well matches with the kind of circuit that the shadow meter came from in its original chassis. Anyway, this is an interesting radio to work on and I'm anxious to see how it performs. John

Fredericton,  N.B.  Canada


Messages In This Thread
First Post on 37-620 restoration - by copiertech - 12-19-2011, 07:31 PM
Re: First Post on 37-620 restoration - by copiertech - 12-20-2011, 06:16 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Jackson 715 not working
Mrfixr55, its working now. I cleaned the switches and sockets with spray cleaner. Thanks for helping on this one.daveone23 — 06:26 PM
Jackson 715 not working
Now that you posted the schematic, I don't know why that Sprague electrolytic cap is across the meter, as it is not indi...MrFixr55 — 05:51 PM
HiFi (Chifi) tube amp build - but my own design.
What may be lacking in the PP Tube amps may be the 2nd harmonics, which some, especially RCA back in the day called &quo...MrFixr55 — 05:32 PM
Jackson 715 not working
Usually in an emission tester, the tube under test is measured as if it were a diode. So, some testers connect all the g...RodB — 04:17 PM
Restoring Philco 37-604C
Yep. F5 is green, D5 is Red. Red is Bad. Green is Clean.morzh — 01:30 PM
Jackson 715 not working
I did start to do that but I stalled out because I could not figure out how the grid and plate get voltage. In this diag...daveone23 — 11:52 AM
Restoring Philco 37-604C
(Insert Homer Simpson "DOPF" Here.) When all fails, look at the can. Took the Ron Ramirez advice, red Caig D...MrFixr55 — 09:23 AM
Philco 91 Speaker Replacement
From your text I am not sure if you intend to use the existing speaker with a resistor instead of the field coil. It wo...morzh — 08:44 AM
Philco 91 Speaker Replacement
My field coil is bad. I am still hoping to find an original, but if I can't I will go with a fitting Philco speaker, 125...dconant — 08:34 AM
Philco 91 Speaker Replacement
As Rod said, it is OK to use a fitting speaker, and then look for an original one. If you buy a Hammond 125 output tr...morzh — 08:15 AM

[-]
Who's Online
There are currently 3871 online users. [Complete List]
» 1 Member(s) | 3870 Guest(s)
Avatar

>