by EWBrown » Fri Feb 29, 2008 7:54 am
FWIW, I found that 6189s (near 12AU7 equivalent) will balance up very nicely in the Poseidon and ST70 driver boards, I get the identical plate voltage on both sides.
ECC82s, 12AU7s and some 5814As seem to always have a voltage differential.
I haven't tried other PI tubes, like 12BH7, 6CG7, etc.
The 2 boards are eventually going into a Heapkit AA-151 "total makeover" power amp - no preamp, tone stack, etc, just the gritty basics . Yellow_Light_Colorz_PDT_06
That's yet another "in progress" project, just coasting along at around 75% completion...
/ed B in NH
Real Radios Glow in the Dark