[Amps] Henry RF generators

[Jay Sturtevant]

Chris,

Your name sounds familiar. Did we go to to school together? What is your
call?

Jay, K2ZT

On Tue, Dec 15, 2020, 6:35 PM Chris Wilson <chris at chriswilson.tv> wrote:

>
>
>   15/12/2020 23:23
>
> Many Henry RF generators on 27 or 14 MHz use a brass (?) slug within a
> copper tube coil for inductance changing (as the turns counter advances the
> slug within the coil the inductance reduces) and a rather Heath Robinson
> variable capacitor using two brass  plates, with a Teflon insulation sheet
> between them. Now I realize they were not intended to be frequency agile,
> so my question is, is there an advantage to changing the strange looking
> variable cap for a vacuum variable? Is the consensus of opinion that slug
> tuning the inductor is fine and can be left as is? Thanks.
>
> An example Henry RF deck is at http://www.chriswilson.tv/deck.jpg
>
> --
>        Best Regards,
>                    Chris Wilson.
> mailto: chris at chriswilson.tv
>
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