After much success with the ST35 project (thanks very much for the help there!), I convinced myself to upgrade to high-sensitivity speakers, which now forces me to build a low-power amp.
Any ways, I got the impression that the 6B4 tubes would be more common and less expensive, but from the offerings I've seen, I wouldn't mind making the G*S*G upgradeable to a 6A3, 2A3 or other similar tube.
I have a plan in place, but need to check my logic here...
To use a 2A3, is there a reason I couldn't use a simple resistor-divider to cut the 6.3V down to 2 or so? Is the max amps from the power tranny the only thing preventing me from doing this? The XPWR005 would be maxed out by the 2A3 heaters, but since the 6SL7 doesn't take much, how much should I worry about overdriving the secondaries? Would something like an XPWR131 (330-260-0-260-330@175, 6.3@4A, 5@3A) and a 5xx rectifier suffice? Or would I need to overkill with an XPWR016 (350-0-70-350@450, 6.3@5A, 6.3@5A)?
Also, how 'separate' do the heaters need to be for DHT tubes? Would a 12.6V w/ a center tap be good enough? Or do they need to be completely separate windings? Would an XPWR114 (330-0-330@200mA, 6.3-0-6.3@3A 5@5A) suffice.
Since Edcor is at an 8 week lead time, would it behoove me to ask Edcor for a custom power tranny?