[NJARC] Six volt vs five volt rectifiers

Harry Klancer klancer2 at comcast.net
Wed Mar 4 20:33:17 EST 2009


Nick,

The B+ is usually pulled off of the rectifier filament lead. I'd have to 
look at how they're
doing it in this case. What is the radio?

                       Harry K

NICHOLAS SENKER wrote:
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> I am working on a 1940 Philco radio which uses a six volt rectifier (type 84).  This is neat because it simplifies the circuit and eliminates a winding on the transformer.  My question is why isn't this used more?  It seems that any heavy duty circuit such as a power amp or television uses a 5 volt rectifier, eg 5U4.  Is it because of the possibility of a cathode to heater short?  I imagine this would be disasterous for a six volt rectifier on the rest of the filament string.  Comments?
> Nick Senker
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