LF: 73kHz Tx]

[Andre Kesteloot]

Here are the details of Laurie' s transmitting station that crossed the Atlantic
on 73 kHz
André N4ICK
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Laurie Mayhead wrote:

> John asks for details of the Tx set up here:-
>
> This consists of a PLL synthesiser driven by a VXO which can be pulled
> enough to produce 1-2 cycles frequency shift by a small capacitor and relay.
> This feeds a Decca transmitter producing about 1000W. This is transformer
> coupled to a  loading coil and variometer with a max inductance of
> 6.5mH.which resonates the Ant. The Ant is an inv L with a vert. section 50ft
> high and 600ft of top load (not in a straight line) This is all hung up in
> trees which tend to absorb about half the power,so the 1000W from the Decca
> produces about 400mW at the Ant. and about 200mW is radiated.
>  I use QRS by Rik Strobbe to produce the DFCW information.
> Hope this helps. 73s Laurie.