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Re: [Amps] SB-200

To: "" <>
Subject: Re: [Amps] SB-200
From: Hal W5GHZ <>
Reply-to: Hal W5GHZ <>
Date: Thu, 9 Feb 2012 19:25:18 -0800 (PST)
List-post: <">>
My vote is for the grid resistor and cap

 From: "" <>
Sent: Friday, February 10, 2012 1:37 AM
Subject: Re: [Amps] SB-200
This wouldn't be a case of the input switch wafer out of alignment with the 
output wafer would it?

Gerald K5GW

In a message dated 2/8/2012 8:33:15 P.M. Central Standard Time, writes:

Hi  All.

I have a SB-200 and it developed a problem in the last week or  so.

When tuning up on 40, the Load cap is all the way meshed and the  Tune cap 
about 50% meshed.  It puts out about 400 watts on  40.  On 40, the input 
is 1:1.

In 80 the Load cap is all  the way meshed.  It puts out about 200 watts.  
input SWR is  1:1.

I checked to make sure the 2 sections of the Load cap were  soldered 
OK and they are.  I disconnected the cap that is  switched in on 80 and 
replaced it with another one and still doing the  same thing.

If the tubes are going soft, will it affect the tuning like  that?  Seems 
like I've replaced the tubes before but never had the  problem of the Load 
cap being all the way meshed to load on 40.   Thanks and 73
Tom  W7WHY

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