[Heathkit] IM 28 VTVM Problem

Mon, 25 Feb 2002 19:07:32 -0500

  I'd check the 12AU7 (substitute) and also the caps
from the 12AU7 grids to ground. And the resistors in the
12AU7 grid and cathode circuits.

73,  Mark  WB8JKR

On Mon, 25 Feb 2002 15:59:19 -0800 "Rick Gouge  VER7RiK"
<[email protected]> writes:
> Hi Guys, Well i have been working on this VTVM all day. I recap it 
> and I
> have a problem with the DC calibrate. I put the meter on 1.5 volts 
> and DC+
> and the meter slowly goes to full scale . I can not bring it back 
> with the
> zero ajustment. If i put the range to 50 volts or better i can ajust 
> it with
> no problem. Any ideas? Rick VE7RiK
> 
> 
> _______________________________________________
> Heathkit mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/heathkit

________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today!  For your FREE software, visit:
http://dl.www.juno.com/get/web/.