It is in the 1984 or 87 Handbook (or both?)
KM3G
-----Original Message-----
From: Dave Bernstein <dhb@mediaone.net>
To: Steve Lawrence <smlx@earthlink.net>; amps@contesting.com
<amps@contesting.com>
To: <amps@contesting.com>
Date: Friday, September 25, 1998 8:09 PM
Subject: RE: [AMPS] SB 200 on 160
>
>Anyone have a scan of this article? If so, I'd appreciate a copy. Thanks
in
>advance...
>
> Dave, AA6YQ
>
>
>
>> -----Original Message-----
>> From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
>> Behalf Of Steve Lawrence
>> Sent: Friday, September 25, 1998 11:08 PM
>> To: amps@contesting.com
>> Subject: [AMPS] SB 200 on 160
>>
>>
>>
>> Doug DeMaw had an article on adapting the SB 200 for 160m in Sept. 1979
>> QST. I utilized the input circuit only per the article to allow operation
>> on all bands 80 through 10 including the WARC bands. The 15m
>> position works
>> for 17m and 12m while 30m works when the 40m position is selected.
(Before
>> you comment, it is perfectly legal to use the amp on 30m if the input is
>> limited to 200W.) The article had a major error which doug confirmed.
That
>> is: the input and output connections of the broadband toroid are reversed
>> as shown in the article. You'll get a 9:1 input SWR unless you correct it
>> (reverse the connections to C16 and RL1). Although I haven't tried it, I
>> have every reason to believe, based on Doug's typically fine
>> work, that the
>> mod for the plate circuit for 160 shown in the article will work. I've
had
>> the input circuit mod installed for over 18 years with zero problems.
Nice
>> to know that the plate choke isn't resonant in the WARC bands.
>>
>> 73, Steve WB6RSE
>>
>>
>>
>> --
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>>
>>
>
>
>--
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>
>
--
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