Hello Stefan,
I am not sure a (lossless) capacitor in parallel with the coil will lower the
antenna efficiency.
I would assume that it will affect the antenna impedance as seen from the TX,
but will not change the ratio Rrad/Rloss (what determines the antenna
effeciency).
73, Rik ON7YD
________________________________________
Van: [email protected] [[email protected]]
namens DK7FC [[email protected]]
Verzonden: donderdag 19 november 2015 17:00
Aan: [email protected]
Onderwerp: Re: LF: Re: Antenna relays
Hi Chris,
I would assume such a large HV switch and the whole construction adds a
few 10 pF to your system. This C has of course no radiation resistance.
So this lowers your antenna efficiency a bit!
73, Stefan
Am 19.11.2015 15:52, schrieb Chris Wilson:
> Hello Vincent,
>
> Thursday, November 19, 2015
>
> That looks a hefty beast, never seen one though. I do have a R140 amp
> in the loft, awaiting power supply and control board completion. I
> might e-mail the Polish ham I got the amp from and see if he knows of
> any of those! I wonder how much they would cost though? Thanks for the
> link, I know Dom F1FRV quite well, he might know who has one.
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