telefunken: unknown Telefunken |
Konrad Birkner † 12.08.2014 
Officer
D Articles: 2334 Schem.: 700 Pict.: 3655 15.Jan.07 12:53 Count of Thanks: 5 |
Reply | You aren't logged in. (Guest) 1
Who can identify this Telefunken model? It uses strange Telefunken tubes, equivalent to US types: RENS324 = 24, RENS351 = 51 =35, and a Philips PH247 =47. Rectifier 80. One of the tubes has a sticker by Telefunken, Milano, which qualifies it for special purpose (eg oscillator).
Any idea? regards,KoBi |
Alessandro De Poi 
Schem.: 2478 Pict.: 5584 15.Jan.07 18:46 Count of Thanks: 4 |
Reply | You aren't logged in. (Guest) 2
According to Guida Pratica Antique Radio vol. 1, it looks like a Telefunken 540, made in 1932. The picture in the book looks identical to your set, but hasn't got the Telefunken escutcheon below the dial. The book reports it has just 4 tubes, but it might be wrong. Edit: the book must be wrong because also the schematic reports 5 tubes. Production years: 1932-33. This article was edited 15.Jan.07 19:37 by Alessandro De Poi . |
| Konrad Birkner † 12.08.2014
Officer
D Articles: 2334 Schem.: 700 Pict.: 3655 15.Jan.07 19:49 Count of Thanks: 4 |
Reply | You aren't logged in. (Guest) 3
Thanks, Alessandro, this radio features an IF of 160 kc (might initially have been 150 or 170) . That is currently the resonance frequency of a filter, which may have aged. Could there have been a precedent model? The tube count could have made the english way those days, when the rectifier did not count, but sometimes was mentioned separately, as for the tuning indicator. The unusual Telefunken tube types are embossed at the sockets:
This article was edited 15.Jan.07 19:52 by Konrad Birkner † 12.08.2014 . |
