Schaub Kongress H (1950)

[Geaney]

My next radio project has arrived. I haven't looked at it very closely yet. It's interesting in that is has FM on the dial but no FM circuitry inside. It seems this was launched just about the time FM was being introduced and either the FM module was an option or it was added later when it became available. I've seen pictures online of the set with the FM module fitted but I can't imagine I'll ever find one. So, it's an AM set, series filament, three valve plus selenium rectifier. I won't be starting on it for a bit - haven't given up on the SE Labs scope yet! It features a mod which appears to break the feed to the audio output transformer so maybe this was someone's idea of a mute button!

Cheers, John

[AlanBeckett]

That range of Valves seems pretty obscure. I can't say I've ever come across them before. You'd better hope they're OK.
How about these to play with - http://www.ebay.co.uk/itm/4-FM-tuning-heads-for-spares-Vintage-Wireless-Valve-Radio-/201182857210?pt=UK_Collectables_RadioTelevision_Telephony_SM&hash=item2ed76ec7fa

Alan

[pwdrive]

This might be the schematic:

http://dbl.musicweb.ch/schematics/Radios...C3%9FH.jpg

Lawrence.

[Refugee]

It looks like a couple of Phillips 353As have been sacrificed to yeald those front ends.

[Geaney]

This might be the schematic:

http://dbl.musicweb.ch/schematics/Radios...C3%9FH.jpg

Lawrence.

Thanks Lawrence - that's the beasty alright!

Cheers, John

[Geaney]

That range of Valves seems pretty obscure. I can't say I've ever come across them before. You'd better hope they're OK.
How about these to play with - http://www.ebay.co.uk/itm/4-FM-tuning-heads-for-spares-Vintage-Wireless-Valve-Radio-/201182857210?pt=UK_Collectables_RadioTelevision_Telephony_SM&hash=item2ed76ec7fa

Alan

Hi Alan, I guess I'll wait to see if I can get the basic set going before I worry too much about adding FM :-)
Cheers, John

[AlanBeckett]

That Base never really caught on and unfortunately my B40C is riddled with them
I guess the 'U' version is even more obscure.

Alan

[pwdrive]

It might be worth noting that the c,g5,s connection for the UCH71 is via the valves spigot and not the valve pins as such:

http://frank.pocnet.net/sheets/062/u/UCH71.pdf

Lawrence.

[pwdrive]

Regarding my last post, the reason (I think) for that unusual connection can be got from this:

http://frank.pocnet.net/sheets/046/u/UCH21.pdf

The Schaub radio takes advantage of that for the 1st AF amp.

Lawrence.

[AlanBeckett]

That's a useful Datasheet for my B40 which uses CV302/ECH21.
What's the difference between the 21 and the 71?

Alan