As the title says I want to know your views on this: I have a receiver which requires 220 volts DC HT for the valve anodes and 12.6 volts DC for the heaters from a seperate PSU at the moment I have it run via a variac fed from an isolation TX the unfortunate thing is its audio output is a bit on the low side so I want to run it through an audio amplifier the thing is the amp has the mains neutral straight to chassis and one side of AF input also to the chassis so if I link the 2 beasts together my receiver RF Earth will also be taking the amps chassis to earth I could run it all from the isolation TX do you think that's the best option?
Hi thanks for your replies it sort of confirmed what I thought il just run the lot via an isolation TX. The receiver is a US Army unit from the flying corps originally it was run from a vibrator pack to turn 28 volts from the battery's into 220 DC for the anodes my set has its heaters wired for 12 volts but some are 28 volts which wouldn't be much good because I don't have that sort of voltage available. The amplifier is an ex dansette record player amp it has the turntable motor as a auto transformer to give 90 volts for its 2 heaters and the mains is half wave rectified for the HT. I love old kit it's easier to work on and tends to just work when asked to not like computer gear which always seems to find a thousand ways to not work
Hi thanks for your replies it sort of confirmed what I thought il just run the lot via an isolation TX. The receiver is a US Army unit from the flying corps originally it was run from a vibrator pack to turn 28 volts from the battery's into 220 DC for the anodes my set has its heaters wired for 12 volts but some are 28 volts which wouldn't be much good because I don't have that sort of voltage available. The amplifier is an ex dansette record player amp it has the turntable motor as a auto transformer to give 90 volts for its 2 heaters and the mains is half wave rectified for the HT. I love old kit it's easier to work on and tends to just work when asked to not like computer gear which always seems to find a thousand ways to not work
