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Converting Solid State to Tube Rectification on a Preamp

I am looking to convert my Preamp from a Bridge Rectifier to a Tube Rectifier.  Any members have done or knows how to do this. Your help are much appreciated!


128x128zipost
imhififan's avatar
imhififan
2,204 posts
 
@salectric
A solid state power supply often uses a full-wave-bridge (4 diodes) that can be fed by a power supply winding that does not have a center-tap.
Is it possible to use two 6X5 or one 6X5 with 2 Schottky Diodes, and add a heater transformer to make use of the existing power transformer?
noromance's avatar
noromance
9,820 posts
 
You need to use a center-tapped transformer with a 6x5 to achieve full-wave rectification. 
imhififan's avatar
imhififan
2,204 posts
 
How about using four rectifier tubes like 6AX4 to create a full-wave bridge?
czarivey
5,946 posts
 

...so you need to check all 4 tubes in tube rectifier bridge if operational?

imhififan's avatar
imhififan
2,204 posts
 
@zipost
Do you have the schematics of your Blue Circle 21 preamp? and what is the B+ voltage?
BTW, I also found a BC21.1 with outboard power supply on usaudiomart.
http://www.usaudiomart.com/details/649027319-blue_circle_211_tube_preamp_with_bcg31_power_supply_fre...
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