Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

Philco TPA-1
#36

Tim

1. I apologize, I meant between the R2 and the "Negative of C1" (where R3, R4, C1 negative and the transformer come together). Can you repeat it? If it still is broken on the low volume:

Can you do the following:

With the whole thing turned on (when you connect the musical source or when you play a record), can you measure the voltage between:

1. the Ground and the "-3V" battery terminal?
2. the Ground and the lower (according to the schematic) L5022 transistor's Collector terminal (the one going to -3V)? Measure right at the terminal.
3. the Ground and upper transistor's Emitter?
4. the ground and "+3V" battery terminal?

When measuring voltage on batteries' terminal, measure at actual spring contacts or better yet and NOT on the batteries own contacts. Better yet measure at the point where wires solder to those contacts.
What I want to know is what voltage the actual schematic is seeing. The contacts may be dirty or oxidized and I want to exclude it.


Additional:

With unit OFF:

1. try to measure with Ohmmeter across both transformers' primary and secondary windings.
When measuring wait for a few seconds making the result is stable (there is a capacitor there).
list the readings here.

For the first transformer they are 3700/120 Ohms for primary/secondary.
For the secondary they are 150 for primary and 14.5 for both secondaries.

2. Measure resistors R2 through R10. List the values.


Messages In This Thread
Philco TPA-1 - by tim1 - 01-16-2014, 01:25 PM
RE: Philco TPA-1 - by morzh - 01-16-2014, 02:29 PM
RE: Philco TPA-1 - by tim1 - 01-16-2014, 02:53 PM
RE: Philco TPA-1 - by morzh - 01-16-2014, 03:14 PM
RE: Philco TPA-1 - by tim1 - 01-16-2014, 03:16 PM
RE: Philco TPA-1 - by morzh - 01-16-2014, 03:22 PM
RE: Philco TPA-1 - by morzh - 01-16-2014, 03:41 PM
RE: Philco TPA-1 - by tim1 - 01-16-2014, 04:57 PM
RE: Philco TPA-1 - by morzh - 01-16-2014, 05:07 PM
RE: Philco TPA-1 - by Ron Ramirez - 01-16-2014, 05:16 PM
RE: Philco TPA-1 - by TV MAN - 01-17-2014, 12:57 PM
RE: Philco TPA-1 - by morzh - 01-17-2014, 01:00 PM
RE: Philco TPA-1 - by tim1 - 01-17-2014, 07:42 PM
RE: Philco TPA-1 - by morzh - 01-17-2014, 08:25 PM
RE: Philco TPA-1 - by tim1 - 01-17-2014, 08:29 PM
RE: Philco TPA-1 - by morzh - 01-17-2014, 08:31 PM
RE: Philco TPA-1 - by TV MAN - 01-17-2014, 10:13 PM
RE: Philco TPA-1 - by tim1 - 01-17-2014, 11:11 PM
RE: Philco TPA-1 - by morzh - 01-17-2014, 11:19 PM
RE: Philco TPA-1 - by tim1 - 01-17-2014, 11:40 PM
RE: Philco TPA-1 - by morzh - 01-17-2014, 11:45 PM
RE: Philco TPA-1 - by tim1 - 01-18-2014, 12:06 AM
RE: Philco TPA-1 - by morzh - 01-18-2014, 12:10 AM
RE: Philco TPA-1 - by tim1 - 01-18-2014, 07:54 PM
RE: Philco TPA-1 - by morzh - 01-18-2014, 08:09 PM
RE: Philco TPA-1 - by morzh - 01-18-2014, 08:14 PM
RE: Philco TPA-1 - by tim1 - 01-18-2014, 08:37 PM
RE: Philco TPA-1 - by morzh - 01-18-2014, 09:15 PM
RE: Philco TPA-1 - by tim1 - 01-19-2014, 07:22 AM
RE: Philco TPA-1 - by morzh - 01-19-2014, 02:37 PM
RE: Philco TPA-1 - by tim1 - 01-19-2014, 08:03 PM
RE: Philco TPA-1 - by morzh - 01-19-2014, 09:56 PM
RE: Philco TPA-1 - by tim1 - 01-19-2014, 10:15 PM
RE: Philco TPA-1 - by morzh - 01-19-2014, 11:54 PM
RE: Philco TPA-1 - by tim1 - 01-20-2014, 03:08 PM
RE: Philco TPA-1 - by morzh - 01-20-2014, 03:23 PM
RE: Philco TPA-1 - by tim1 - 01-20-2014, 07:21 PM
RE: Philco TPA-1 - by morzh - 01-20-2014, 10:21 PM
RE: Philco TPA-1 - by morzh - 01-23-2014, 04:01 PM
RE: Philco TPA-1 - by tim1 - 01-23-2014, 06:03 PM
RE: Philco TPA-1 - by morzh - 01-23-2014, 06:59 PM
RE: Philco TPA-1 - by tim1 - 01-26-2014, 08:39 PM
RE: Philco TPA-1 - by tim1 - 02-03-2014, 11:39 AM
RE: Philco TPA-1 - by morzh - 02-03-2014, 11:48 AM
RE: Philco TPA-1 - by tim1 - 02-03-2014, 03:04 PM
RE: Philco TPA-1 - by morzh - 02-03-2014, 03:26 PM
RE: Philco TPA-1 - by tim1 - 02-04-2014, 06:41 AM
RE: Philco TPA-1 - by morzh - 02-04-2014, 10:42 AM
RE: Philco TPA-1 - by morzh - 02-08-2014, 09:25 PM
RE: Philco TPA-1 - by morzh - 02-09-2014, 09:08 PM
RE: Philco TPA-1 - by morzh - 02-09-2014, 11:21 PM
RE: Philco TPA-1 - by Ron Ramirez - 02-10-2014, 06:32 AM
RE: Philco TPA-1 - by morzh - 02-10-2014, 09:51 AM
RE: Philco TPA-1 - by morzh - 02-17-2014, 06:52 PM
RE: Philco TPA-1 - by tim1 - 02-21-2014, 12:24 AM
RE: Philco TPA-1 - by morzh - 02-21-2014, 10:26 AM
RE: Philco TPA-1 - by tim1 - 02-21-2014, 02:25 PM
RE: Philco TPA-1 - by morzh - 02-21-2014, 02:30 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 10-16-2019, 10:38 PM
RE: Philco TPA-1 - by morzh - 10-16-2019, 10:46 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 10-26-2019, 03:25 AM
RE: Philco TPA-1 - by morzh - 10-26-2019, 05:40 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 10-26-2019, 06:20 PM
RE: Philco TPA-1 - by morzh - 10-26-2019, 07:07 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 10-26-2019, 07:48 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-13-2019, 11:40 PM
RE: Philco TPA-1 - by morzh - 11-14-2019, 10:30 AM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-14-2019, 11:59 AM
RE: Philco TPA-1 - by morzh - 11-14-2019, 12:43 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-14-2019, 11:59 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-15-2019, 12:20 AM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-15-2019, 01:23 AM
RE: Philco TPA-1 - by morzh - 11-15-2019, 11:49 AM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-15-2019, 05:56 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-15-2019, 08:04 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-15-2019, 09:03 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-16-2019, 12:43 AM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-16-2019, 01:21 AM
RE: Philco TPA-1 - by Jake Blake - 11-16-2019, 02:11 AM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-16-2019, 02:15 AM
RE: Philco TPA-1 - by PhilcoFordTesla - 11-16-2019, 08:32 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 06-16-2024, 11:03 PM
RE: Philco TPA-1 - by morzh - 06-17-2024, 09:02 PM
RE: Philco TPA-1 - by PhilcoFordTesla - 06-17-2024, 11:47 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
1949 Motorola 5A9M
This would be the second portable in the "other radios" forum where I have a similar one in my collection. I h...Arran — 12:41 AM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hi PittsburgTost. The record changer looks like a Garrard or BSR (Likely Garrard). The spindles just pull out and pu...MrFixr55 — 11:57 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hello PittsburghToast , Welcome aboard and it looks like gary may have something for you ! now if I dig through my se...radiorich — 11:35 PM
Model 80 Antenna Issue?
You are kind of on the right path. You can touch the grid cap of the Detector/Oscillator 36 tube. I'm expecting a respon...RodB — 08:48 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Welcome to the Phorum, PittsburghToast!  I found an old thread that my interest you regarding the quality and worth of P...GarySP — 08:48 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Welcome to the Phorum! :wave: We do not have anything on that unit in our digital library. There is a Sam's Photof...klondike98 — 08:47 PM
Model 80 Antenna Issue?
I’ve replaced all the caps and resistors and the radio is working but minimal volume unless I put my hand near the re...Hamilton — 08:24 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hi there! this is my first time posting. I recently picked up this Ford-Philco Console record player and radio at a yard...PittsburghToast — 07:28 PM
philco predicta
I found that where I have the 140v B+ there is 50v and the tuner receives 235v through the orange cablecgl18 — 04:14 PM
Philco 91 code 221
Chassis grounds thru rivets is another good place to look. Oh and the stator screws on the tuning cap where the leads at...Radioroslyn — 08:11 AM

[-]
Who's Online
There are currently no members online.

>