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

Philco 39-31 Code: 121
#1

Hi,
I pulled out the Philco 39-31 code 121 to finally take a shot at doing the alignment. I am a beginner when it comes to vintage radio alignment so please be patient with me.
On step #1  it says to connect  through a .1uf to the grid of 6A8G at a freq. of 470 kc (radio on 580 KC). I am assuming that is pin 5 ? or should I attach to the cap of the tube?
On step 3 it says to attach through a 100 mmf 1550 KC (Radio on 1550 KC) and adjust  # 5 and # 4A . (4A is the trimmer capacitor on the tuning capacitor.) When I try to adjust #4A absolutely nothing happens. ???????

Any help is greatly appreciated.


.pdf 39-31 code 121.pdf Size: 1.63 MB  Downloads: 229
#2

First of all, use this data sheet.   https://philcoradio.com/library/download...20Book.pdf     which can be found in the library of this site. If you look at the table about the alignment, you will notice the first column says where to input the signal, to the grid of the 6A8G, meaning the CONTROL grid, i.e. the grid cap, through a .1 mfd condenser, with the wire to the cap removed for aligning the IF frequency. The other signals for aligning the RF frequencies are injected through the antenna connection through a 100 mmfd condenser.
#3

Much appreciated mikethedruid

Stay well.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need Help to ID this radio 11 tube Philco
If you want a radio that's difficult to work on, get a 37-620. The one side of the chassis is packed pretty tightly and ...Greg — 07:29 PM
Need Help to ID this radio 11 tube Philco
Philco 16 is not intimidating at all. Despite being an 11-tuber. 37-116 is indeed intimidating. 16 has good space unde...morzh — 04:11 PM
48-482 rear panel help
Thanks for the responses Gary and Bob. I'm a little surprised that there's no back panel - although I know older Philco'...keithchip — 04:09 PM
48-482 rear panel help
Gary is correct, there was not a rear panel on the 48-482. I restored one of those and its a great sounding radio that ...klondike98 — 03:24 PM
The list of my radio & TV collection!
A little light positivity in our feed... To nostalgic retro music... With English subtitles My new video on the contin...RadioSvit — 02:14 PM
My Philco 37-116 Restore
Ron and Mike I mentioned a 2 meg resistor not on the schematic. I stumbled on a changes note in Riders that mentioned th...dconant — 12:02 PM
Need Help to ID this radio 11 tube Philco
Here you go: Your the code 125Radioroslyn — 11:12 AM
My Philco 37-116 Restore
Hi Ron, Thanks for the input. I think I'm going to call it good enough. It does seem weird I can usually dial in othe...dconant — 08:01 AM
Need Help to ID this radio 11 tube Philco
Welcome, the radio looks intimating 11 tubes, wish you well.Jimradio — 07:49 AM
462ron
Hi Dan, it’s been 10 years since I restored the electronics on my 37-116 so I’m going on some foggy memories. I remember...462ron — 07:37 AM

[-]
Who's Online
There are currently 543 online users. [Complete List]
» 1 Member(s) | 542 Guest(s)
Avatar

>