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Re: LF: PA3BCA

from [Stefan Schäfer] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: PA3BCA
From: Stefan Schäfer <[email protected]>
Date: Fri, 12 Aug 2011 20:02:31 +0200
In-reply-to: <52970A62D1224CAF9A966D1743DCBF00@PcMinto>
References: <[email protected]> <52970A62D1224CAF9A966D1743DCBF00@PcMinto>
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Hi Minto,

Am 12.08.2011 19:42, schrieb Minto Witteveen:

How much power were you generating?

73’s, Minto pa3bca
 


It changes all the time. Not even sure since i just have an E field probe to decouple some power from my TX antenna and feed it to a 50 uA amperemeter, shunted by a potentiometer. This poti was adjusted to show 100% full scale when using 120 W RF before some weeks. Now reduced the parallel R on the poti so it shows just 25 uA then. Got 50 uA anyway by QRO and more (not sure). So it should be arround 500W. This is -6 dBfs :-)

But the antenna, i.e. the coil and its cover is very lossy it seems. When there was rain, i have up to twice the losses :-( Need to search for an alternative cover (mustn't burn, so a water barrel is no alternative...).


73, Stefan/DK7FC
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