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

40-190 RF Problems - Need Help
#4

I don't know if this is related to your problem but you missed one capacitor, there is a two section wax dipped mica capacitor at one end of the pushbutton coil assembly that can go bad apparently. Other then this I would go back and check the wiring, make sure that it matches the schematic for the correct code number and production run (aside from the 5Y3 mod). The audio output transformer should normally have B+ going to the center tap of the primary, and from that center tap to the screen grid of one of the #41 output tubes and throught a 3900 ohm resistor to the screen grid of the other #41 tube. The two outside legs of that transformer going to the plates of the #41 output tubes, one side of the secondary should go to chassis ground or common negative.
Regards
Arran


Messages In This Thread
40-190 RF Problems - Need Help - by Pepperoni - 10-15-2011, 03:47 PM
Re: 40-190 RF Problems - Need Help - by Pepperoni - 10-15-2011, 08:00 PM
Re: 40-190 RF Problems - Need Help - by Arran - 10-16-2011, 10:11 PM
Re: 40-190 RF Problems - Need Help - by Pepperoni - 10-16-2011, 11:09 PM
Re: 40-190 RF Problems - Need Help - by Arran - 10-16-2011, 11:19 PM
Re: 40-190 RF Problems - Need Help - by Pepperoni - 10-17-2011, 12:30 PM
Re: 40-190 RF Problems - Need Help - by codefox1 - 10-17-2011, 04:19 PM
Re: 40-190 RF Problems - Need Help - by 7estatdef - 10-17-2011, 05:08 PM
Re: 40-190 RF Problems - Need Help - by Pepperoni - 10-17-2011, 05:32 PM
Re: 40-190 RF Problems - Need Help - by Pepperoni - 10-18-2011, 01:49 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM
Philco model 38 code 121 not receiving signal.
Well here it is. It ain't pretty, but hopefully it'll work. I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM

[-]
Who's Online
There are currently 1003 online users. [Complete List]
» 1 Member(s) | 1002 Guest(s)
Avatar

>