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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