Recent content by _arch

Thanks for your answer. It confirms my thoughts. Moreover, when i had this amp, it was fitted with Philips miniwatt ECC83 in V1, V2 and V3, which are vintage, but not long plate as far as i know.

Hi everybody I'm working on a Mark IV A (Built august 92) which needs serious servicing (recapping, new vactrols, new tube socket and so on). On my PCB, there is a difference on preamp tubes heater connections. On the schematics, it's written : V1 12 VDC on pin 5, ground on pin 4 and V2-V5 6.3...