Recapped My Predicta Tandem, I don't know what to do
Posts: 1,205
Threads: 84
Joined: Jan 2014
City: Annapolis, IL
State, Province, Country: USA
BSQ, what kind of diodes? Selenium or ? I know a lot of sets used selenium rectifiers in that era and they get bad. I don’t know if your set uses those or not. I can’t tell for sure in the pictures. Might check. That 270v feeds both your vertical and video outputs as well as the horizontal. Your 410v boost is low too. Note that this power supply is a voltage doubler circuit.
If I could find the place called "Somewhere", I could find "Anything"
Tim
Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44
(This post was last modified: 01-07-2022, 12:02 PM by TV MAN.)
Messages In This Thread
RE: Recapped My Predicta Tandem, I don't know what to do - by TV MAN - 01-07-2022, 11:37 AM
Users browsing this thread: 1 Guest(s)
|
Recent Posts
|
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 |
Philco model 38 code 121 not receiving signal.
|
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM |
Testing a speaker and output transformer Trutone A2-G
|
morzh
Short-circuited turns can be considered as a half-dead transformer.
But on this case transformer will hot and s...Vlad95 — 11:01 AM |
Testing a speaker and output transformer Trutone A2-G
|
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM |
Who's Online
|
There are currently 2303 online users. [Complete List] » 3 Member(s) | 2300 Guest(s)
|
|
|

|