[Amps] Henry RF generators

[donroden at hiwaay.net]

404 NOT FOUND


Quoting Chris Wilson <chris at chriswilson.tv>:

> 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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