transformer question S-6424

[Bieworm]

on Sluckey's documents this build requires a power TX wit 150mA HT  sec wiring. is this really necessary or can I use a 600V CT with 100mA too for this build? Also, can I use 6V6GT in the power section instead of the 6973's ?
note: same for the OT, I would like to use the Hammond 1750 PA in my stash. 8400 ohm CT 18 watt

thx

[SnickSound]

on Sluckey's documents this build requires a power TX wit 150mA HT  sec wiring. is this really necessary or can I use a 600V CT with 100mA too for this build? Also, can I use 6V6GT in the power section instead of the 6973's ?
note: same for the OT, I would like to use the Hammond 1750 PA in my stash. 8400 ohm CT 18 watt

thx

You can make lots of changes, just don't expect it to be the same amp in the end.
The 100mA PT is cutting it a bit short though. Might run warm and sag more than expected.

They did make 6424s with 6V6GTs, some will argue they are not the same. Maybe... But given that the only current production 6973 is the EHX that is considered pretty bland, I can see the interest in going with the 6V6. I did build mine with 6973s, because why not. Then I converted it to a Blackface circuit (turns out I had no use for a 6424 in my gigging life) and it sounded like a Blackface amp. It has since been rebuilt for 6V6 due to availability... so I get it. I also switched to a GZ34 recto and fixed bias at the same time so can't really directly compare.

OT wise... well I used a 1750E in mine. Same impedance (or close) as the 1750PA, but it is smaller and lighter. Both will work, but the 1750PA is technically a "better" OT and might sound too good... if you will. Both are very cheap. Oh yeah, when I changed to 6V6 I also changed to a 1750PA. Man do I love this amp now, but it is faaaaar from its original 6424 days. I do miss the grid biased channel, it was fun... but useless for me live (I play out way more than I play in).

[Bieworm]

I hear you. Same deal here. My gigging amps are a vibro king ( when it's a larger venue) or my beloved 18W tremolo TMB.  In fact I have 2 tremolo TMB amps.. one with and one without reverb. I don't need another amp persé but I like to build.. a lot!!
I have a classic 18W with tremolo, but that one isn't used ever.. so I wanted to give it another life with the supro circuit. It's for a next project anyway.  Because I'm still tweaking the imperial clone I build. I altered the OD channel and by doing that there are other issues I have to deal with...

[SnickSound]

I hear you. Same deal here. My gigging amps are a vibro king ( when it's a larger venue) or my beloved 18W tremolo TMB.  In fact I have 2 tremolo TMB amps.. one with and one without reverb. I don't need another amp persé but I like to build.. a lot!!
I have a classic 18W with tremolo, but that one isn't used ever.. so I wanted to give it another life with the supro circuit. It's for a next project anyway.  Because I'm still tweaking the imperial clone I build. I altered the OD channel and by doing that there are other issues I have to deal with...

You sound a lot like me lol, can't stop myself from building new amps or modifying existing ones.

You can certainly have fun changing that amp into a 6424 kind of thing. I'm no 6424 expert, but as far as I'm concerned what gave the amp a really distinct flavor was the paraphase inverter and the use of small 5nF ceramic coupling caps (yes, ceramic! makes a real difference if you want a proper Supro). I also really enjoyed the grid biased channel (not sure if Sluckey's version has it), but enjoyable in the same way as that one fuzz pedal you keep around for fun but almost never use. It won't clean up and has no low-end. But it's fun.