Is there a thread or list of the currently available power supply boards/options for the ST-70? My ST-70 project will include the DIYtube driver, cloth-lead A470 OPTs, a new toroidal power tranny. Though I have a quad cap that is untested by me, I want to consider one of the modern cap boards depending on the response and recommendations from this forum. The chassis I am using had a quad cap meltdown, so I'm going to clean that up and rebuild. I have rebuilt an ST-70 before that I kept in the stock configuration with stock driver, so this one will include a variety of inexpensive upgrades.
I would like to ask here for the pros and cons of the power supply options, given the above parts I have, or have on the way.
Here's what I've found for capboards:
I was reminded of and I'm adding here the Curcio offering which can be either above or below chassis:
Blank Board w/ Parts (KIT-S7U-B) = $65
Classicvalves has one at http://www.classicvalve.ca/dynaco.html#ST70P but it is *out of stock* $19.50 plus parts $40 more or less I would guess. Geek, any lead time info?
There's the triodestore.com offering - an updated SDS Labs design...ST70capupgrade board alone $38.95 or with parts at $76.95
the original or classic SDS Labs board which would be a homemade (my first) PCB based on the design and instructions PDF download from http://www.quadesl.com/pdf/st70_capboard.pdf plus approx $38 - $49 in parts, it appears depending on cap values - regular or high.
Stock configuration options appear more affordable, but additionally require the PS parts (a couple of caps, resistors on the terminal strip as I recall) under the chassis :
Capacitor - Electrolytic, 30/20/20/20 µF @ 525 VDC from tubesandmore for $33.95 (This looks like the one I inherited with the project.)
Tubes4hi-fi: original type UPGRADED quad cap (80+40+30+20uF@525v) $40
Thanks in advance for your opinions and advice. I am not an electrical engineer, but love the hobby. I will save the bias options (maybe they are in the question above with some of the solutions) and rectification options questions for another evening/thread.