Either that or the 3.3 uf Fluoropolymer Film he has 'on sale' at $395 each.
OK, math was never my big thing but...
I would appear that, if the stepped pot/active load upgrade increases the load on the 300B for 3K by an order of magnitude, or thereabouts, and the stepped pots drops the volume control's load on the 300B by just half, then maybe I don't need a 10uF output cap? And if I really want to keep the volume control/balance control as-is for now and only do the active load part of the upgrade, then a 3.3uF output cap should work as well as the 10Uf does in the stock circuit?
However...
I plan to leave things as-is, with no cap upgrades or other nonsense until AFTER I do the active load part of the 'sweet whispers' upgrade and see if it does anything for the 'hard' upper range I'm hearing (which might be more 'detail' or 'dynamic range' than I am used to with the prior 6SN7 pre?).
Currently unning some NOS AVVT AV-5'Bs (low power 300B's with max 16 watt plate dispensation designed as driver tubes for BIG triodes but also used in 'Lapazator' DACs and such). They sound very good but still, leading edge of piano notes (piano is a 'percussion' instrument) about knock one out of their listening chair.
http://www.elektronenroehren.de/avvt/datashts/av5b.htmThat said, if dynamic range in a tube pre-amp is something one needs, the BeePre2 certainly has it. And the MonAmour monblocks are SO good that whatever the pre-amp sends is exactly what you get. Plus EdgarHorns are not going to dampen dynamics much either.
But some if not all of the best custom built pre-amps I've heard use DHTs as output tube, albeit with BIG chokes loading them. Here's hoping the active load part of the 'sweet whispers' acts as said BIG choke; one with a flat frequency response. Gotta be better than a 3K sand cast resistor, I'm thinking.