[Boatanchors] My unknown 1920s receiver

[Glen Zook]

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