Tweaking Super Lead specs

SpiderWars said:
I think it's 200 plates and 50 screens. It's typical Marshall power supply so I'm never really sure how to calculate that main node with the PT center connected the way it is. The look to be in series but I've been told not to calculate it that way. The screens are for sure in series so 50uF total for sure.
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If it's two 200uF in series, it's 100uF total, regardless of the center tap.

SpiderWars said:
Merren OT. It orig had a Merren PT but I could hear it soon as I turned it on, and I hate that. I want silence when I flip that switch. So it has a MM PT in it now.
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Merren makes good output transformers. So if it doesn't sound good now, I don't think a different OT will do much. Unless you got a dud?
 
FourT6and2 said:
If it's two 200uF in series, it's 100uF total, regardless of the center tap.


Merren makes good output transformers. So if it doesn't sound good now, I don't think a different OT will do much. Unless you got a dud?
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Yes, 2x 200uF. I just remembered I dogpiled 4x 100s in there at first but it looked pretty bad.

That's why I still haven't swapped it out. It's 99% not that. But I'm at a loss.
 
FourT6and2 said:
Your '67 had all the filter caps on the interior, right? On a separate turret board? What was the total capacitance for the first, main reservoir node directly after the rectifier?
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Mine has mains and screens on a board. PI is a can in the corner and preamp is a can inder the board. Originally there were 2 150uf caps for mains.

IMG_0818.jpegIMG_0819.jpeg
 
FourT6and2 said:
Ok so for the main resi node, there were two 150uF in series? In parallel? What was the total capacitance for the node directly after the rectifier?
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Yes. It was the two original 150uf and they were in series. Don’t remember what they measured. I replaced them with two F+T 100uf in series, all I could find. Would like to find something closer sometime, but it is working for now.
 
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