1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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

Linear Mode
Philco 20 voltage
Awon
Junior Member
**
Posts: 4
Threads: 1
Joined: Nov 2016
City: Houston, tx
#8

11-11-2016, 08:24 PM
Well I have fixed my problem with the plate voltage on the 71a tubes. It was my fault I will admit it. I had the leads reversed to the speaker. J & D. Voltage is now 220vdc. I still do not have the -50vdc but I don't know if my Meter is just not reading it right since it is a dmm. Checked the pin 6 on the transformer and it's -8vdc. Resistance from the centertap of audio transformer to pin 3 on the 71a is 2.3k and 2.7k. This was the resistance I got before recap. Could this transformer be suspect anyway? Also tubes test good.
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
Philco 20 voltage - by Awon - 11-11-2016, 12:15 AM
RE: Philco 20 voltage - by Radioroslyn - 11-11-2016, 08:14 AM
RE: Philco 20 voltage - by morzh - 11-11-2016, 09:10 AM
RE: Philco 20 voltage - by Awon - 11-11-2016, 01:37 PM
RE: Philco 20 voltage - by klondike98 - 11-11-2016, 02:57 PM
RE: Philco 20 voltage - by Radioroslyn - 11-11-2016, 04:09 PM
RE: Philco 20 voltage - by morzh - 11-11-2016, 04:39 PM
RE: Philco 20 voltage - by Awon - 11-11-2016, 08:24 PM
RE: Philco 20 voltage - by Awon - 11-11-2016, 08:38 PM
RE: Philco 20 voltage - by Radioroslyn - 11-11-2016, 10:57 PM
RE: Philco 20 voltage - by NostalgiaRadioTime - 11-13-2016, 11:04 PM
RE: Philco 20 voltage - by Radioroslyn - 11-14-2016, 12:21 AM
RE: Philco 20 voltage - by NostalgiaRadioTime - 11-14-2016, 11:26 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco Model 38-7: what caps & resistors do fail typically?
Hello Martin, Welcome aboard our little community what great Model 38-7 Sincerely Richardradiorich — 12:30 AM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum Martin. I count about 9 paper caps, the 3 electrolytic caps and 2-Y2 safety caps to replace th...RodB — 09:44 PM
Part numbers to model cross
Jim, We have this index put together by Dale Cook but I don't think that is quite what you are looking for. The Parts...klondike98 — 09:37 PM
Philco Model 38-7: what caps & resistors do fail typically?
Yep the dim bulb test is OK but I'd definitely replace all those electrolytics before I did it. Since those #47 conden...klondike98 — 09:18 PM
Philco 42-345 Restoration/Repair
The resistor is a 2.2 Meg, it was the last one I hadn't replaced. The broadcast is coming in after replacing it.osanders0311 — 09:09 PM
Philco 42-345 Restoration/Repair
What does the resistor measure? I think it should be 3.3 Meg. If the oscillator coil has continuity and the resistanc...RodB — 09:03 PM
Philco Model 38-7: what caps & resistors do fail typically?
Good idea to check the coils... then I'll get hold of an incadescent light bulb and see what happens when the unit is sw...Musaeum — 08:49 PM
Philco 42-345 Restoration/Repair
I have that same set, ain't too much shortwave I like anyway.....it is a good AM DX set. PaulPaul Philco322 — 08:32 PM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum, Martin! Open a new thread in Philco Electronic Restoration when you begin working on your 38-7. ...GarySP — 08:28 PM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum! :wave: Here's the schematic for that radio from our digital library: Something to do bef...klondike98 — 08:05 PM

[-]
Who's Online
There are currently 916 online users. [Complete List]
» 1 Member(s) | 915 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration