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general-el: Power tube S-22

Martin Renz Ernst Erb Vincent de Franco Martin Bösch Bernhard Nagel Otmar Jung Heribert Jung Eilert Menke 
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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » general-el: Power tube S-22
Mauro Cattaneo
Mauro Cattaneo
I  Articles: 2
Schem.: 0
Pict.: 166
30.Aug.17 19:04

Count of Thanks: 4
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Hello, on my S-22 chassis on the paper stamped on the back side i read, back of 80 tube, two TUBE  RCA UY247, there are missing, while looking the schematics there are two 45 tubes, what are the right tube i va to insert?


Steffen Thies
A  Articles: 262
Schem.: 5
Pict.: 20
31.Aug.17 21:14

Count of Thanks: 3
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Hello Mauro,

if you check the data here, you will see that the 247 is a penthode with the same heater voltage as the 45. So this may be a later upgrade. A look at the socket will show which it is!