Videokarma.org TV - Video - Vintage Television & Radio Forums

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Videokarma.org TV - Video - Vintage Television & Radio Forums (http://www.videokarma.org/index.php)

- Early B&W and Projection TV (http://www.videokarma.org/forumdisplay.php?f=19)

- - Dumont Club RA102 (http://www.videokarma.org/showthread.php?t=246657)

old_coot88

12-10-2009 04:49 PM

Quote:

Originally Posted by Ampico-kid (Post 2961633)

The High Voltage rectifier and low voltage power supplies are on a separate chassis.

So.. The HV supply is RF ('non-flyback') type, and the CRT is electromagnetic deflection. Fascinating (Mr.Spock).:D Could you elaborate a bit more on the H deflection system using those two 807s? That large black can is a transformer(?). Thanks. Bill(oc)

Tim	12-10-2009 11:15 PM

Bill:

The large black can is the HOT. The two 807s are connected in parallel and amplify the sawtooth feeding the primary.

The schematic of that portion of the set is here:
http://i126.photobucket.com/albums/p...m/DSC01716.jpg

John Marinello

12-11-2009 05:27 PM

Quote:

Originally Posted by M3-SRT8 (Post 2961636)

Can you sub a 16DP4 for a 15AP4? What needs to be changed out? Focus Coil?

I'm thinking that the seller made a mistake on the CRT number. I know Dumont used a 15DP4, maybe others can chime in to confirm?

Ampico-kid

12-11-2009 07:46 PM

Quote:

Originally Posted by John Marinello (Post 2961764)

I'm thinking that the seller made a mistake on the CRT number. I know Dumont used a 15DP4, maybe others can chime in to confirm?

The DuMont Service notes indicate the crt in the Club model is a 15AP4.

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