|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
|
|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
In Reply to: Ah, that's more interesting, then. posted by JimL on March 19, 2007 at 18:21:24:
I'm yet more seat of the pants and ignore the FET's internal resistance. 260 V./150 KOhms = 1.7 mA. That's SAFE. A 1 W. part will do, as long as air flow is decent and air flow is also needed for the FET.Keen's remark about the little FET being a good replacement for a 'X7 CF hits the target. The FET's transconductance (gfs) is nearly proportional to Id. If gfs is about 1.7 mA./V., the O/P impedance is under 1 KOhm. That's certainly adequate to drive a 50 KOhm pot. on the same chassis.
BTW, 510 Ohms or 1 K is what I'd use as the stopper value. Caution on my part.
Eli D.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Ah, that's more interesting, then. - Eli Duttman 19:31:21 03/19/07 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
