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Old October 14th, 2008, 06:28 AM   #1 (permalink)
Domocaster
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Join Date: May 2008
Location: pocklington, york
Age: 51
Posts: 18
swopping a 5Y3 to a GZ34

Hi everyone,
Question for all you clever tech-heads;
Amp Model; Gibson GA 5T 1960 model; tube line up;
1x 12AX7, 1x 6BM, 1x 5Y3.
In "Inside Tube Amps" by D. Torres, he states one can change a 5Y3 for a GZ34, rectifier tube.
Is this so?
The reason I'm asking is this; The amp sounds a lot better with the following filter caps; 40uf/500v; 20uf/500v, 10uf/500v.
As opposed to the 20uf/500v, 10uf/500v, 10uf/500v, that are specified on the schematic.
In the above book, it is stated that 5Y3's cannot have more than a 20uf/500v filter cap in the first filter posistion.
So, to sumarise; do I need to change the rectifier tube to a GZ34 if I wish to use the larger caps?
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