GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Melquiades Amplifier
In the Thread: About the pre-warming of playback

Post Subject: Amp 're-warming' issues...Posted by Axel on: 8/14/2009

Romy,
do not spit in my eyes as I do have solid state PassLabs 350.5 but even with this 50W Class A amp (push pull) it is exactly the same problem if it is switched off completely even for a short while. I can take ~ 2 - 3 days to be back to normal if it was COMPLETELY switched off.

In the case of Pass, it uses a stand-by switch in front (main power-off in back) and will keep the power-supply's electrolytic capacitor bank charged.

In the case of power down to stand-by the amp is fully back ~ 1/2 hr. after being switched on.

I know tubes are more involved, I also know BAT preamp behaviour. I think first is to keep the power-supply caps charged and second (~ maybe...) to run very low heater current which I think you mentioned - but it is the capacitors in the power-supply that in my estimate cause the much bigger problem when allowed to get fully discharged.
Axel

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