[Amps] SB 200 problem

[Carl]

Unless you use an exact replacement, replace both diodes. Accuracy wont 
suffer but sensitivity will with silicon.

Carl
KM1H


----- Original Message ----- 
From: "Al Kozakiewicz" <akozak at hourglass.com>
To: "RAY FRIESS" <rayfrijr at msn.com>; <gzook at yahoo.com>; 
<amps at contesting.com>; "boatanchors" <boatanchors at mailman.qth.net>
Sent: Friday, May 04, 2012 10:58 AM
Subject: Re: [Amps] SB 200 problem


> No, at least not if you want any kind of accuracy.  Germanium diodes have 
> a nominal forward biased voltage drop of about 0.3 volts - silicon is 0.7.
>
> Al
> AB2ZY
>
> ________________________________________
> From: amps-bounces at contesting.com [amps-bounces at contesting.com] On Behalf 
> Of RAY FRIESS [rayfrijr at msn.com]
> Sent: Friday, May 04, 2012 10:57 AM
> To: gzook at yahoo.com; amps at contesting.com; boatanchors
> Subject: Re: [Amps] SB 200 problem
>
> If it turns out to be a bad diode, and I cant gind a germanium, can I use 
> a regular power supply type diode to replace it? Date: Fri, 4 May 2012 
> 07:55:45 -0700
> From: gzook at yahoo.com
> Subject: Re: [Amps] SB 200 problem
> To: rayfrijr at msn.com; amps at contesting.com; boatanchors at mailman.qth.net
>
> Check the germanium diode that provides the voltage for the "forward" or, 
> in this case, the power output, indication.  There are 2-diodes, 1 for 
> forward and 1 for reverse (SWR position).  It sounds like the forward 
> diode is bad.  Very common!
> Also, clean the meter switch. Glen, K9STH
>
> Website:  http://k9sth.com
>        From: RAY FRIESS <rayfrijr at msn.com>
> To: amps at contesting.com; boatanchors
> <boatanchors at mailman.qth.net>; FLBOATANCHORS 
> <flboatanchors at yahoogroups.com>
> Sent: Friday, May 4, 2012 9:30 AM
> Subject: [Amps] SB 200 problem
>
>
>
>
>
>
> I have a Heath SB 200 amp that is working fine with one exception.   The 
> meter is not functioning in the power out position.It reads fine for high 
> voltage, grid, and SWR functions, just not for power output.   I have to 
> use an external wattmeter to tuneupand check power output. I thought it 
> might be just my amp until the other day when I was at a ham friends of 
> mine, and he told me he had the same problemwith his SB 200. Anyone else 
> had this problem and know what to do to fix it?
>
>
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