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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">On 20 Sep 2011 at 15:14, Jerry Haigwood wrote:</span></font></div>
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<div align="left"><font face="Arial" color="#7f0000" size="2"><span style=" font-size:10pt">> Ken,</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style=" font-size:10pt">> I get about 90 mA of idle current using the Keyall. I don't think it is</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style=" font-size:10pt">> affecting my SB-200.</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">It sure doesn't sound like it, all right. Out of my curiousity, which 572Bs are you using? </span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">> I also added a soft-start circuit, HV fuse, glitch</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style=" font-size:10pt">> resistor, new fan, new caps, new rectifiers, meter protection diodes, new</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style=" font-size:10pt">> tubes, new knobs and a new paint job. I get 600 Watts output with 52 watts</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style=" font-size:10pt">> of drive. It is a very nice amp.</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">Well, I certainly agree with your assessment. IMHO it IS a very fine amp. Completely reliable
and always works. I get a minimum of 600 watts output with between 50 and 70 watts of
drive, and as soon as I "indulge" in some of the suggested mods at this site:</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">http://pa0fri.home.xs4all.nl/Lineairs/SB200/sb200eng.htm</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">I expect it to be even more reliable and efficient.</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">I had already installed new caps and new diodes, and done some work in the final "cage" to
improve efficiency.</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">It is pretty obvious to me that most of the problems I have been having with this particular
SB-200 are due to poor original construction and abuse by later owners. I bought it used from
a ham north of us, who had bought it used from someone, who had...etc.</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">vy 73,</span></font></div>
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<div align="left"><font face="Arial" size="2"><span style=" font-size:10pt">Ken W7EKB</span></font></div>
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