[Amps] [Boatanchors] SB 200 problem

[Alex Eban]

A better replacement would be a new pair of schottky diodes' something like
1N5711.
I had the same problem with the coupler in the TS 140 I use. After repeated
breakdowns I replaced both and all my troubles went away. The threshold
voltage of the Schottky diodes is closer to the germanium diodes so the
scale calibration is preserved.
They are also practically burnout proof.
Alex	4Z5KS

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Gary Schafer
Sent: Friday, May 04, 2012 6:21 PM
To: 'RAY FRIESS'; amps at contesting.com; 'boatanchors'
Subject: Re: [Amps] [Boatanchors] SB 200 problem

Not too long ago I bought some 1N34 diodes at radio shack. I don't know if
they still have them.

73
Gary  K4FMX

> -----Original Message-----
> From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors- 
> bounces at mailman.qth.net] On Behalf Of RAY FRIESS
> Sent: Friday, May 04, 2012 10:58 AM
> To: gzook at yahoo.com; amps at contesting.com; boatanchors
> Subject: Re: [Boatanchors] [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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