Get in touch with Allen Harbach at Harbach Electronics....he has all that
stuff available. 407-723-7145 or wa4dru@iu.net
73....Carl KM1H
On Wed, 21 May 1997 12:38:32 -0500 "Wendell Wyly - W5FL" <w5fl@flash.net>
writes:
>Question 1: The fan in my SB-220 starts making noise after several
>minutes
>of operation and the temperature of the exhaust air has increased
>significantly. Quiet when it cools back off. Can they be lubricated
>or is
>there any source for a good quality fan. I built mine in 1980 and
>this is
>the first problem (still has both original tubes) so I am satisfied
>with
>the performance.
>
>Question 2: When I work on the fan, I would like to add a switch to
>allow
>standby operation. Is there a mod that changes out the rocker
>switches for
>a three position switch or any other good ideas. I also want to add a
>circuit to control the relay from a low level supply as I DO NOT like
>bringing the relay return out to a solid state transceiver. I would
>prefer
>to build the circuit rather than use one of the commercial boards for
>that
>purpose, but I guess an inexpensive one would work as well.
>
>Wendell Wyly W5FL w5fl@flash.net
>
>--
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>Submissions: amps@contesting.com
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>Problems: owner-amps@contesting.com
>
--
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