Home Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

[ Follow Ups ] Thread: [ Display  All  Email ] [ Tweakers' Asylum ]
[ Alert Moderator ]

Re: black gates in parallel

I'm in a 50Hz country. I have seen ESR (Equivalent Series Resistance) quoted at 50Hz but know not why.

I would have thought that temperature is less of a problem with power supply caps in power amplifiers as the power supply of a good amplifier has a rating capable of handling the amps quoted maximum output. The max output is made up of at least 6dB headroom - not much for audio output but a huge difference for the power supply. So a few transients barely trouble the main caps.

Not all designs are so generous. I ‘refreshed’ a Marantz pre and power amp for a friend including placing new ‘grain of wheat’ globes around the big meters. Looked great but the lights dimmed in time with the music when the amp was pushed. I think the moderate transformer may have had something to do with this :)

I note that extra headroom would not be of much help for class A amplifiers or tube amps (heater supply circuit). I've replaced a few bridge rectifiers on heater circuits. I can’t remember if I did the caps as well - I must have? Class A amps are hot all over - heatsink, power supply, case, etc.

As for the shunt cap extending life, I read it again just a day or so ago but can't find where.

Kind Regards,
Robert Karl Stonjek


This post is made possible by the generous support of people like you and our sponsors:
  Signature Sound   [ Signature Sound Lounge ]

Follow Ups Full Thread
Follow Ups
You can not post to an archived thread.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]