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 KRIESLER VALVE RADIO MODEL 540
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 Return to top of page · Post #: 1 · Written at 11:04:41 AM on 28 June 2019.
Bowler's Gravatar
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 17

Good Morning all, I have just purchased a Kriesler model 540 of about 1938 vintage. I have the circuit from A.O.R.S.M but it does not show any voltages on valves, nor any resistor ratings. It is designated as "progectographic" . It also has a 6B5 output valve which I don't have. Any help would be appreciated. bowler


 
 Return to top of page · Post #: 2 · Written at 10:43:18 PM on 28 June 2019.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5263

It's a poor scan, but I can see some test points giving voltages. Other hints are the rating of capacitors and also the operating characteristics of the valves. Most radio designers stayed within those recommended valve ratings.


 
 Return to top of page · Post #: 3 · Written at 11:12:17 PM on 28 June 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 3711

Australian circuits & American ones tend to have many, inferior circuits when compared to many German ones. In most cases I use one watt resistors to get the voltage rating. B+ dropping resistors may need to be more.

6B5 is an unusual valve.Data sheet http://frank.yueksel.org/sheets/201/6/6B5.pdf


 
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