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Re: LF: EA in LF NOW !

To: [email protected]
Subject: Re: LF: EA in LF NOW !
From: DK7FC <[email protected]>
Date: Thu, 14 Apr 2016 13:29:35 +0200
In-reply-to: <[email protected]cal>
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Am 14.04.2016 12:21, schrieb VIGILANT Luis Fernández:
Now I'm completely sure I bought the right house for a Ham point of view ! ;-)
Hm, can't you buy the other building too, and run a wire at 100m AGL? :-)

Then the next issue (appart of PA) will be a switching system to be able to alternate Tx periods in MF and LF. Think it will be doable using small power
and vacuum relays. It's a pity to be forced to choose to Tx in only one band
That's a problem of many of us. But there is not really a good solution if you want to maximise the efficiency of each band. On QRP it may work but i find it's better to put the effort in the improvement of the radiated power ;-)
Better to switch manually each few days. Also, during the years here i have not heard about someone who realised such a serious band switch. The problem is, you need to switch at HV and the complete arrangement will have a significant C against ground, which will lower the efficiency of the whole system. But of course, there ARE solutions, like a large mechanical switch as used in HV switch gears...
Just my opinion of course.


73, Stefan
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