Posts: 15,804
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
Two things.
1. Make sure your switch is clean and provide good contact across all ranges. It is S2 Range switch.
2. I don't think this is it (I think only the lower dual triode is involved for DC, as for everything else), but just in case, have the tubes been checked?
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.
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
Tubes and resistors are fine. R22 measures 9k so iam not sure if that could be the issue.
Posts: 15,804
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
Switch. Check the switch. Make sure it makes good contacts. Clean if necessary, Deoxit D or any contact cleaner (be careful and don't spray it all around).
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.
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
I cleaned and checked the sw2 switch, its fine. Has to be something in the .5v to 15v circuit. Iam going to check the ac operation.
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
No ac function. Pegs the meter to the left, no adjustment.
Posts: 15,804
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
If I had it in front of me, I would triy to trace the signal on one of the non-working functions.
Try to trace and highlite at least one non-working path.
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.
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
At this point, there is no input, just internal voltages
Which are incorrect and not sure what they should be.
Posts: 15,804
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
Those will probably depend on teh switch combination.
Could you list some that you see, their values and what they should be (if you know correct values)?
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.
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
Check out this crazy zero pot operation. Touching it drives it crazy. Its rubber tipped. Also the 6al5 has no negative voltage on it.
https://www.dropbox.com/scl/fi/gnvltn9la...fvikk&dl=0
Posts: 15,804
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
If this is R22, check the voltage on the wiper (86V).
If this is R33, see if the lower pin indeed connected to GND, the wiper is indeed wipes, and if the pot is OK.
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.
(This post was last modified: 11-10-2024, 03:29 PM by morzh.)
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
I measured the wiper of r22 , 95vdc.
(This post was last modified: 11-10-2024, 05:14 PM by daveone23.)
Posts: 15,804
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
The resistor you are touching at the video, is it R22 or R33?
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.
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
R22, but it doesnt do that all the time. Strange. What do you think of the 95 voltage. I guess its close.
Posts: 15,804
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
Yes, it is close. It is a solid state diode rectifier, so the voltage won't depend much on the load, as would with tube rectifier.
However the behavior is strange.
Also, see if this pot,s case (and so the shaft) should be grounded through the fron panel, and somehow it is not.
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.
(This post was last modified: 11-10-2024, 07:20 PM by morzh.)
Posts: 95
Threads: 19
Joined: Jun 2024
City: tampa
State, Province, Country: florida
Case and shaft go to case. Center wiper of r22 has 3kohms to case.
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
My last cabinet for this year
|
| They are a nice looking radio, Stromberg.
I have a small tabletop octagon-dial one. It sounds surprisingly nice.
And t...morzh — 09:40 PM |
|
Philco 41-608 changer coupler
|
|
Different years but the same idea.morzh — 09:38 PM |
|
My last cabinet for this year
|
| That’s a beauty!
:thumbup:klondike98 — 09:24 PM |
|
Philco 41-608 changer coupler
|
| Hi Morzh,
I've searched using Mondial as the user name with various keywords such as 'coupler', 'motor', 'idler', 'p...alangard — 08:31 PM |
|
Philco 16B Parts
|
| I think the chassis is painted.morzh — 08:13 PM |
|
Philco 38-2 Automatic Tuning
|
| Honestrly, the original is quite acceptable and, it seems to me, can be cleaned.morzh — 08:11 PM |
|
Philco 41-608 changer coupler
|
| Mondial left a thread about remanufacturing thois type coupler.morzh — 08:09 PM |
|
IF can wire size and Rubber mounts?
|
| Are you talking about rewinding or rewiring?
For rewiring, meaning runnin wires to the coil from other components, the ...morzh — 08:08 PM |
|
12' Philco
|
| I wonder who would be able to "no stoop" with this one.morzh — 08:05 PM |
|
IF can wire size and Rubber mounts?
|
| Hello PHORUM members,
I am still working on restoration of my PHILCO 37-640. I want to start with rewiring the IF ca...georgetownjohn — 06:32 PM |
|
Who's Online
|
There are currently 3647 online users. [Complete List]
» 3 Member(s) | 3644 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
