In Reply to: Re: 958a posted by Doc B. on January 27, 2006 at 08:35:01:
I was able to control the bell ringing by dropping the filament voltage a bit. Steve Bench got me onto that when I built his 512 6088 battery phono preamp. Those little tubes will howl with the slightest filament over voltage--drop it down a bit and pay atention to physical vibration isolation made a big difference. Though 958As have not been as bad as others in my experience. Probably because their filaments are shorter.
Matt
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Bell ringing - mwiebe 11:15:37 01/27/06 (1)
- Re: Bell ringing - Doc B. 11:35:43 01/27/06 (0)