ORIGINAL MESSAGE:
On Tue, 23 Feb 2010 22:08:15 -0800, "Jim Thomson" <Jim.thom@telus.net>
wrote:
>
>The SB-1000 does not require a step-start. The transformer is designed so that
>the
>secondaries have enough impedance to protect the diodes and tube filament at
>startup. It
>also has a relay to protect the switch (at least mine, which is a late model,
>does).
REPLY:
My SB-1000 had a terrible "thump" at turn on. The thump was actually
the cabinet, which is steel. Electrically, it was probably not an
issue, but I installed a step-start circuit to keep peace in the
shack. :-)
73, Bill W6WRT
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