> I recall a few years one of the British Telecommunications journals
> (POEEJ/BTTJ/IBTE/TCNJ - I forget which name it was using at the time) had an
> item about a low-loader mounted LF/VLF station which had a radiator supported
> by a helium balloon. Or was it the Navy's definition of mobile: anything you
> can move around with a battleship?
John F5VLF
> On 28 May 2015, at 00:10, DK7FC <[email protected]> wrote:
>
> Hmm, i find someone should do a real mobile (mobile-mobile, with a velocity >
> 0) experiment. A 1.5 m long CB antenna with a special preparated feed point
> should work. And i think that the wire works better with a fixed C in
> parallel, even if this reduces the efficiency. But it stabilises the SWR or
> better said, the voltage on the wire. Corona? Where is the problem with
> corona? :-)
> Markus, could you calculate the ERP when 10 kV rms is applied to a 1.5m high
> antenna on a car roof? I bet you have all the formulas in your mind :-)
>
> Maybe the antenna has 10 pF. I remember i have a 470pF/16kV capacitor at
> home. So if C = 470 pF and f = 475 kHz, L = 239 uH With 470 pF parallel to
> the antenna, a moving wire (= changing C) does not make a significant effect
> i think.
> 10 kV at 239 uH at 10 kV is 14A. If P = 200 W, the losses must be 1 Ohm !
> With a good RF litz wire, this is possible :-)
>
> What would be the ERP and possible distance?
>
> It would be interesting to try that in WSPR / QRSS-60 :-) I would also drive
> to someone for making a CW QSO but most likely there is a LOT of QRM when
> driving...
>
> More ideas?
>
> 73, Stefan
[email protected]
Researching history of RABSON, BLACKSHAW, GAUNTLETT, VERLANDER and ROBSONNE
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