Different idling current, excessive tube dissipation, distortion in SSB.
It all depends upon which side of the correct idling current you go to. The
SB-200 wants 90ma.
Carl
KM1H
----- Original Message -----
From: "Jeremiah Hall" <jeremiah1@everestkc.net>
To: <amps@contesting.com>
Sent: Monday, February 13, 2012 12:38 PM
Subject: [Amps] SB-200
> Got a question What would the result of the improper amount of Operating
> bias be on an SB-200?
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Jeremiah Hall
> Sent: Friday, February 10, 2012 15:11
> To: amps@contesting.com
> Subject: [Amps] (no subject)
>
> Hi all
>
> I have an SB-200 that has the same issues that another person on the list
> was having I was only getting 400W out except I don't have 1:1 Swr between
> the radio and the Amp. The best I can do is 1.8:1. I did what other on the
> list had told him to do. (check the grid resistors and the 200pf mica
> capasitors at the sockets) and found that the 33 Ohm resistor going to V1
> had blown up. I replaced the resistor but am still having the same issues.
> The tube (V1) does have some burn marks on the inside of the glass. I am
> looking for ideas on where to go from here. Thanks
>
> Jeremiah KC0VTJ
>
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