On Jun 4, 2006, at 1:45 AM, Peter Chadwick wrote:
> In my innocence, something puzzles me. Is the indexing on the SB220
> bandswitch very weak, or are the capacitors very stiff? I would
> have thought that the resistance to turning of the bandswitch would
> be sufficient to tell the oeprator that he (or she) was attempting
> to turn the wrong knob before it actually moved.
So glue tacks on the bandswitch knob so you can feel the difference
in the dark.
> What size is the bandswitch? Is it the one with centres about an
> inch and a quarter apart? If so, it's pretty marginal at 1 kW: the
> KW1000 amp from KW Electronics in the UK used that size switch, but
> had a phenolic shaft to get the voltage rating up.
The place that breaks down most often are open contacts, usually
those on the 10m and 15m positions.
R L MEASURES, AG6K. 805-386-3734
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