HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3

[Buttman]

HI! Here my circuit for my next projekt:

An externally hosted image should be here but it was not working when we last tested it.

It is possible to build?
My transformers for heating and plate voltage doesnt have a center tap!
I have build a similar psu mit 2 diodes (BY6) und two 866A for my 211 SE and works very well.
What are your opinions about the circuit (see pic)?
Iam very happy for answers.

Best Regards from Spain

 

[oldschooltube]

Looks solid to me. I built a hybrid with 6by5 using same circuit and results were great.

 

[Keit]

Although TV damper diodes are rated to take kilovolts between heater and cathode, you should not leave the heater circuit floating. Either tie one side to the cathodes or tie one side to chassis. Then the rectifier tubes are less likely to fail shorted heater-cathode, and (if you earth it) when one of them does fail, it will let you know. Note that the 6CG3 has a low heater -cathode voltage rating for a damper - heater can be 900 V neg but no more than 100 V +ve.

And if you earth one side of the rectifier heater supply, you can use it for other tubes.

The pin connections on your circuit are incorrect. 6CG3's are in compactron format with heater pins 1 & 12, cathode pin 7, and anode pins 4 & 10. Have you got compactron sockets for the tubes?

 

[Buttman]

my correction. It is correct Cathodes of both 6CG3 placed to one heater?


i know the correction, i built in eagle a fast libary, sorry .

 

[Keit]

my correction. It is correct Cathodes of both 6CG3 placed to one heater?


i know the correction, i built in eagle a fast libary, sorry .

I assume you meant to ask is it ok to tie both heaters to the common cathode connection at the filter input- the answer is yes, it is.

 

[famousmockingbird]

And for the record......



Buttman you sir have a most bodacious name.

 

[Buttman]

Thanks!