Canadian Admiral 19A11 7JP4 Set

[cbenham]

Can anyone point me to the schematic for the Canadian version of this set? It has an extra R-C filter stage in the power supply [different from the US version] and the transformer is HUGE!
The set is rated at 115 VAC at 25 Cycles, so that's why so much iron in the transformer. It is now working after replacing all the wax caps and electrolytics.
Thanks for any help.

[electroking]

I have a set (unfortunately incomplete) of early Radio College of Canada TV
schematics and service data. The folders are stored elsewhere, but I can look
this up for you over the weekend. This is the first time I have seen a 25-Hz
Canadian TV set in real life!

[Tube TV]

Just old radios should have the RCC for it .
That's the first 25 cycle one I have heard of .
Nice little set .

http://www.justradios.com/

[electroking]

Hello again,

Just came back from the country with the first volume (1950-51) of the RCC
manuals I mentioned the other day. They do have a schematic for your model
number, however it just says 110 VAC without reference to frequency, and
it just has a 5Y3GT rectifier with a series resistor, followed by a standard
C-L-C filter. Are you interested anyway? Just give me a day to scan the
required pages. Regards.

[electroking]

Hello,

Here are all the relevant pages from my RCC manual. In the end, I
believe the power supply schematic is as you described. It has a
C-R-C-L-C topology, as you can check. Good luck, keep us posted
if you wish.

[cbenham]

[QUOTE=electroking;2110698]Hello, Here are all the relevant pages from my RCC manual.

Thanks very much for your efforts. The schematic confirms what is under the chassis.

There was still a vertical problem that I cured by resoldering all the tube socket contacts under the 6SL7. It is solid now and makes a great picture.

Next I have to clean and polish up the bakelite cabinet and the plastic CRT window. I know not to use any cleaner with amonia, and I watched a YouTube video about cleaning bakelite with GO-JO, but would still very much like to know what 'the experts' on this list recommend.

I guess itwill be Novus plastic polish for the window.

Thanks for all the kind help with this set. As I may have said this is the first electrostatic set I've ever worked on.

Cliff

[electroking]

There is a larger screen Admiral (10-inch) in the same volume, that one does have
a magnetic deflection CRT and a conventional flyback HV supply. Congratulations
for this most unusual find. By the way, the transformer on your chassis does look
much bigger than the one shown in the service data. So maybe they had the
same filter circuit as the 60 Hz version, but they had to use a transformer with
more iron.

[cbenham]

Can anyone tell me what to use to clean the bakelite cabinet? I know that anything with amonia is a no-no but I want it to have that deep luster I've seen on some sets at the Mid-Atlantic Radio Club events in the past.

[cbenham]

Here's the payoff of all the restoration work-
a polished bakelite B&W roundie "digital-convertor-ready" Admiral 19A12 displaying the signal from the convertor box and antenna in the picture.