[Boatanchors] My unknown 1920s receiver

[Al Klase]

Glen,

Looks to me like it's a simplified Reinartz tuner, with the ground in a 
slightly unconventional place.  See:

http://www.thebakeliteradio.com/page70/files/reinartz.jpg
and
http://www.antiqueradio.com/images/Reinartz-Fig1.jpg

Make an adapter, and try running it with a triode-connected battery 
power pentode such as a 3V4, 3Q4, 3A4, etc.  With the filaments in 
parallel these make a reasonable substitute for a WD-11/12.  The 3A4 
would be my first choice, as it will draw 200 mA at 1.4 volts, and 
should work well with the existing rheostat.

Good luck,
Al

On 9/9/2017 10:48 PM, Glen Zook via Boatanchors wrote:
> I traced out the circuit of the supposedly UV-199 receiver that I obtained a few days ago.  The UV-199 was just put in there because the tube socket is not wired for the UV-199.  It is wired for the WD-12 and a number of the small envelope 01A type of tubes.  A "normal" 01A, etc., will not fit the hole in the panel as well as being too tall to fit between the socket and the panel.  By the way, the UV-199 has an open filament and none of the usual "fixes" for apparent open filaments (most of the early tube pins were soldered with acid core solder and often, when a filament appears open, resoldering with resin core solder "fixes" the problem) worked!  But, the tube is still good for display purposes.
>
>
> The circuit is a bit strange to me!  However, as wired, it does appear that the circuit is for a regenerative receiver.  However, with a couple of minor wiring changes, the receiver would become a TRF.
>
>
> Anyway, the schematic is posted at the following URL:
>
>
> http://nebula.wsimg.com/12a7f4d4e6db6f6866d0b71d2e1a5c46?AccessKeyId=D1250C433DB440D6B60D&disposition=0&alloworigin=1
>
>
>
>
> Photographs of the receiver, as posted yesterday, can be found at the following URL:
>
>
>
> http://nebula.wsimg.com/718a12679bef85233e521919de45e858?AccessKeyId=D1250C433DB440D6B60D&disposition=0&alloworigin=1
>
>
>
>   Glen, K9STH
> Website: http://k9sth.net
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/