Dynaco MKiii & AB, ultimate MKIII upgrade kit, auto bias for 6SN7 tubes

Dynaco MKiii & AB, ultimate MKIII upgrade kit, auto bias for tubes 12AU7   Amplifier installation diagram Resistor R39 in the bias source must be replaced with a value of 15 Ohm  

CCS Zero temperature coefficient current source for tube phase Inverter All VTA designs using the LM334 for the Phase Inverter tail suffer thusly: long warm up time, temperature sensitivity and balance instability. This can be remedied very ...

ST-70 & AB, ultimate ST-70 upgrade kit, auto bias PC-3 driver - ECF82, 6GH8, 6F2   DYNACO ST-70 - DRIVER 6GH8 ECF82, 6F2   Introduction:  This module has been designed to maintain a constant bias voltage through all power output tubes for your ...

Assembled driver autobias I offer the latest autobias power driver kit. Reliable power signal for triode and pentode PP drive with four power tubes.Indication of autobias, delay of anode current growth after switching on the amplifier. Automatic ...

ST-70 & AB, ultimate ST-70 VTA upgrade kit, auto bias  INSTALLATION AND USER MANUAL FOR THE AB-Q-ST70-ST120 AUTO BIAS MODULE Introduction: This module has been designed to maintain a constant bias voltage through all power output tubes for your ...

ST-70, PC-3 driver - ECF82, 6GH8, 6F2   DYNACO ST-70 - DRIVER 6GH8 ECF82, 6F2   Introduction:  PC-3 driver board completely assembled, including tubes 6F2 (ECF82)