New idea: RE084 drives RS282

[gupsta]

I've not read all the posts, but I was wondering why RS282; it's not a common type or easy to get good power out of. If you got a decent stash id be considering PSE, but if you have only a few, I'd be concerned about find replacements. I guess if you run out you could adapt it use a different type, 211 & 804 have similar mu. 813, GK71, 845, GM70 less mu, but they have different filament requirements.

 

[gupsta]

Off the top of my head, if you're wanting 15+ watts in A1 with 2 stages from a 2V Dac then perhaps

EML30A into 813 triode strapped.

2vrms*1.41*32*8

https://www.audiodesignguide.com/Claudio845/813amp.html
http://www.emissionlabs.com/datasheets/EML-12B-20A-20B-30A.html

 

[euro21]

the Rdc of the each secondaries 70 ohm is not only component transfered torectifiers?
Should be added Rdc primary x transformation ratio?
(Like in some rectifiers datasheets, and PSUD2 example)

LTSpice use -in this case ideally attached- coils as transformer, so impedance transformation working.

BTW the "source" impedance (real part) only stifles in minimal way the tendency of swinging, contrary the L-C tanks.