Search results

No voltage to preamp board, When you quote pin 3 ? where. I am getting roughly 450v at the Red Red leads from Power transformer, Have checked all the leads from PSB, and they check good, The dropper Resistor 10k is good but not getting any volts there, I dont get any Voltage readings at the...

Not getting any voltage past the mains filters, I have replaced rectifier diodes Checked all filter caps, have continuity to all contacts from power supply board to main board, also have scabbed in a choke to see if it was stopping at choke, and choke is good, I am seeing bias at the tube...

Rob, thank you so much, I am going back thru the power board and check the diodes again and the traces etc, I am relieved that the voltage readings are ok, I really did not want to replace the orig, Power transformer, its an export type Number is 105, amp has the Voltage switch on the back...

Hello, trying to get my 1981 mk2b going, I am not getting any volt readings past the mains filtering,stops at screens, I have checked all components on the power board and all are good, Have replaced the stand by switch, and scabbed in a new choke just to check and still no voltage, I am getting...

Hi all 1st post here, I have a mk2 b 1981, sold it 10 years ago and bought it back recently, it has very low power and lots of crossover distortion, have checked all volts with new set of tubes, b+ at 445vdc, all resistors check good, I am thinking possibly filter cap/s, hopefully not a blown...