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

2nd IF Transformer Question
#1

Good morning all, I’m working on my 60L and have been going though the transformers. Yesterday I rewound the primary on the oscillator: The antenna looked and tested great. The 1st IF tested to the specs on the schematic,  but the 2nd IF tested bad unless the schematic is incorrect. It shows values of 34 ohms and 85 ohms and mine tests out at 35 and 46. Is the 85 on the schematic incorrect or is the one winding bad? If it is bad can I rewind it? If so what size wire and how many turns? Thank you!

1929 Victor R-32, 1933 60L, Phil 40-158, Phil 42-400X, Phil 47-1230 Radio/Phono,, 1950 Phil TV t-1104, Air King 4000, Philco 41-105, Philco 37-675, RCA Victor 9K2, PT-50, Phil 54C, PT-44 Cabinet, Phil 118X Cabinet

Gregg Icon_thumbup
#2

I would test it in operation prior to doing anything else. It is probably OK. They are tough to rewind.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#3

Thank you sir, that’s what I will do then. What symptoms would I see if it is not great?

1929 Victor R-32, 1933 60L, Phil 40-158, Phil 42-400X, Phil 47-1230 Radio/Phono,, 1950 Phil TV t-1104, Air King 4000, Philco 41-105, Philco 37-675, RCA Victor 9K2, PT-50, Phil 54C, PT-44 Cabinet, Phil 118X Cabinet

Gregg Icon_thumbup
#4

It will either work or it won't. Won't meaning - No or very low level to the 2nd detector stage - unable to tune.

That kind of winding on a secondary can sometimes have corrosion problems but there isn't usually much current so they don't burn open like a primary. SOMETIMES the tuning (caps) can be the problem.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#5

It is rarely n RF coils that there's continuity and it is bad.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#6

Ok, sounds good. I’ll see how it does once I get it all back together. Thank you both for your input.

1929 Victor R-32, 1933 60L, Phil 40-158, Phil 42-400X, Phil 47-1230 Radio/Phono,, 1950 Phil TV t-1104, Air King 4000, Philco 41-105, Philco 37-675, RCA Victor 9K2, PT-50, Phil 54C, PT-44 Cabinet, Phil 118X Cabinet

Gregg Icon_thumbup




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 3943 online users. [Complete List]
» 1 Member(s) | 3942 Guest(s)
Avatar

>