Recapped My Predicta Tandem, I don't know what to do
Posts: 797
Threads: 42
Joined: Dec 2008
City: Chicago, IL
Two of the wires are for the AC tube filament supply.
Sounds like your horizontal frequency is way off. The frequency is determined by one of the couplates near the 6CG7 tube. There is also a coil with a mica cap in parallel that should be set to resonate at 15,750 Hz to help the oscillator stay in tune.
When you are feeding a signal the AFC circuit is trying to get the frequency right. Predictas tend to freak out like in you photo when the horizontal get too far off frequency.
Have you tried adjusting the slug in that horizontal coil? The frequency range control plays a part here too.
You should go through the horizontal setup procedure outlined in the service info.
(This post was last modified: 01-05-2022, 09:33 PM by Bob Andersen.)
Messages In This Thread
RE: Recapped My Predicta Tandem, I don't know what to do - by Bob Andersen - 01-05-2022, 09:33 PM
Users browsing this thread: 24 Guest(s)
|
|
Recent Posts
|
|
Using a loop on a long wire 60B
|
| It could be hit or miss getting a salvaged loop to resonate for the desired station and it will require some sort packag...Chas — 02:50 PM |
|
Using a loop on a long wire 60B
|
| I searched but couldn't find an exact answer. I'm giving my son my 60B that I electrically restored some 8 years ago (I...JohnCT — 12:49 PM |
|
38-10T chassis Restoration begins
|
| Hello Mr Fixr,
years ago I had to wash two vcrs one was used by the school disctrict and the other was a family who had...radiorich — 10:53 AM |
|
38-10T chassis Restoration begins
|
| My dad's manager took the NRI course many years ago and gave me his course booklets. One of the course lessons was on r...MrFixr55 — 10:20 AM |
|
Philco 38-690
|
| There is a 38-690 for sale on eBay. Nice looking radio. Do those resonators/clarifiers really do anything?dconant — 09:34 AM |
|
Philco 38-2 Low Volume
|
| I have done the RF and magnetic tuning alignment. The magnetic tuning really does its job quite well. Had to do three tr...dconant — 08:41 AM |
|
38-10T chassis Restoration begins
|
| Hello Dan,
Very cool !!
morzh ,
I have seen people put computers and other items in the dish washer !
Sincerely Ri...radiorich — 11:26 PM |
|
38-10T chassis Restoration begins
|
| Arran
I also washed tuning caps in dishwasher and in soap water without having removed the micas.
Upon drying, it wa...morzh — 02:00 PM |
|
38-10T chassis Restoration begins
|
| Hi Richard, I used to build houses and we used a lot of those gold flake counter tops. We even used gold flake ceramic t...dconant — 11:11 AM |
|
38-10T chassis Restoration begins
|
| Hello Guys,
Don't mind my 1950s kitchen countertop and funny thing about that countertop it has little what looks like ...radiorich — 10:53 AM |
|
Who's Online
|
There are currently 2189 online users. [Complete List]
» 1 Member(s) | 2188 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
