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LF: Aerial current

To: [email protected]
Subject: LF: Aerial current
From: Richard Newstead <[email protected]>
Date: Fri, 15 May 2009 17:01:39 +0100
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After my success in getting more current into the aerial yesterday I decided to measure the RF current in the link (link coupled ATU) with a proper RF ammeter. I was somewhat surprised that the current pinned my 1 Amp RF meter. How can that be? I can think of some possible reasons:

1) The meter is wrong (it must be nearly 70 years old)
2) The impedance is not 50 Ohms which is odd because I assume the TX is designed to have a 50 Ohm output and I carefully adjusted the link for maximum power transfer last night). 3) The transmitter is giving out far more power than expected (seems unlikely).

Any ideas?

Incidentally, am I best to measure current in the link or in the aerail wire?

73

Richard

PS - beacon on again 501.6kHz.


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