Ok. Thanks.
I'm looking at my 25-300 C1 and I got the idea to "chop" it up in two sections.
It looks like a fairly simple procedure. Question is if the smaller section
will render in a value low enough? The procedure is non reverseable :)
Sent from my iPad
On 12 dec 2010, at 09:31, Ken Brown <ken.d.brown@hawaiiantel.net> wrote:
>
>> 1, add a smaller C1 to the existing and switch in/switch out
>>
> You probably do not need to switch in/out the smaller variable capacitor,
> because it will be an insignificant amount of additional parallel capacitance
> on the lower frequency bands. You only need to switch the larger variable
> capacitor out on the higher frequency bands.
>
> Another way of putting it:
>
> C1A = small variable
> C1B = large variable
>
> Band ....C1 total=
> 160...C1A+C1B
> 80...C1A+C1B
> 40...C1A+C1B
> 30...C1A+C1B
> 20...C1A+C1B
> 17...C1A+C1B
> 15...uncertain, maybe just C1A
> 12...C1A
> 10...C1A
>
> No need to switch C1A out for any band.
>
> DE N6KB
>
>
>
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