Heya Folks,
Just got some new SCA-35 power supply boards with an option to use a CCS in the cathodes of the 6BQ5's and balance!
(Constant Current Protected Cathode Bias). This is a different method than Dave's and isn't the EFB circuit.
Pic and docs.
$22.50
Typical shipping:
Canada uninsured: $2
USA uninsured: $3.40
Overseas: Depends on country
Cheers!