Recapped My Predicta Tandem, I don't know what to do
Posts: 60
Threads: 7
Joined: Feb 2018
City: paramus, nj
So I was playing with the adjustments a little more and the picture got slightly better then all the sudden went completely white. I started to play with the tuner and the TV showed no reaction. I swapped the tubes on the tuner, and even unplugged the rca lead it had no effect at all. So I slid back the boot on the plug for the tuner, I think I lost a cap somewhere because now I have no voltage on the white wire. Here is what I found. I wasn't able to check the black wire in the center but from the diagram it looks like it's just power for the dial lamp and that is nice and bright.
Orange 207vDc
White 0 volts ac and dc
Green 0 volts DC 98 Volts Ac
Red 0 volts DC 90Volts Ac
I thought they should all be DC voltages am I wrong?
Messages In This Thread
RE: Recapped My Predicta Tandem, I don't know what to do - by apERNA1985 - 01-05-2022, 08:32 PM
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 2295 online users. [Complete List]
» 3 Member(s) | 2292 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
