12 positions needed.
I thought I would just ground unused lower portion of inductor in T-turer.
Am I missing something?
2007/8/30, Tom Rauch <w8ji@contesting.com>:
>
>
> > you know, guys,
> > I was kinda surprised that I was able to fry the switch in
> > 200W-rated tuner
> > using only 100W RF. Geez, I did it in 5 nimutes :)
>
> Alex,
>
> Like I said I can fry a tuner that will take 500W at 100 W
> or less if I tune it wrong.
>
> It's all about how you tune it.
>
> >
> > Speaking of replacement - I found Lorlin CK1458 at
> > mouser.com website. it is
> > 250V or 15A rated, I hope it will work better than the
> > dead one.
> > Is there any alternative place to look for rotary switches
> > and possibly
> > variable capacitors/inductors?
>
> The issue is almost always voltage in the network and
> voltage holdoff in the switch. Normally a switch is sized to
> fail slightly after the capacitors arc.
>
> I wouldn't use a Lorlin CK1458. It's a single pole so you
> can't short the unused coil area out. That's bad news on
> high bands.
>
> How many positions do you need?
>
> 73 Tom
>
>
>
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