I have a 67 Super Reverb that has a PT from a newer 70's Super Reverb. The amp was just serviced and runs fine, I just dont like the way it sounds. The plate voltage is a bit high so I have to run a 5U4GB in place of the GZ34/5AR4 (which I prefer). And I think the higher plate voltage also does not allow the amp to breakup like a typical Blackface Super Reverb.
I want to replace the PT with a Mercury Magnetics FBFS-P40, from what I understand this is the most accurate reproduction available.
I understand the basic safety requirements and have done a few little bias mods and cap replacements on my Princetons and Deluxes...I'm just not sure what (and how) I need to test before and after the swap.
I could just assume that I can remove the virtual center tap, wire the replacement in, compare voltages to the schematics, bias the amp, and be on my merry way...but nothings ever that easy so I thought that I would ask for some help...
I want to do this myself (as in not ship it to a tech)....I also dont want to smoke a new PT or the NOS tubes so I am just asking for some help as I cant find a step by step guide for replacing a PT on a 67 Super Reverb...better safe than sorry, right?
TIA!
I want to replace the PT with a Mercury Magnetics FBFS-P40, from what I understand this is the most accurate reproduction available.
I understand the basic safety requirements and have done a few little bias mods and cap replacements on my Princetons and Deluxes...I'm just not sure what (and how) I need to test before and after the swap.
I could just assume that I can remove the virtual center tap, wire the replacement in, compare voltages to the schematics, bias the amp, and be on my merry way...but nothings ever that easy so I thought that I would ask for some help...
I want to do this myself (as in not ship it to a tech)....I also dont want to smoke a new PT or the NOS tubes so I am just asking for some help as I cant find a step by step guide for replacing a PT on a 67 Super Reverb...better safe than sorry, right?
TIA!
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