Tuesday, 15 October 2013

Attic Dipole

My attic dipole is now an inverted V for 20m with separate elements for 10m band.
I have decided to remove the 40m loading coils which, although worked were not really practical in such a small loft space. Noise was quite high and signals down too.
The 20m reception is really quite surprising and being a popular band , there are nearly always signals present.
As a simple test I ran WSPR on rx  for a while.


Wspr RX on 20m

4 comments:

  1. Good morning Ian, I have had an attic dipole for some time and found it to be very very good and as for the interference I used the MFJ 1026. It was very effective at removing the bad and leaving the good on the bands.
    Mike

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  2. Hi Ian, not bad for a attic dipole. WSPR is a excellent mode to test these kind of things. I'm curious what you can reach when transmitting. 73, Bas

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  3. Hi Mike, the interference was broadband hash and high background level. I have tried a noise steerer , they can help with individual local noise sources.

    73 Ian

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  4. Hi Bas, Yes, surprisingly good receive on 20m. I have used a 1:1 balun and carefully routed coax. Only ever run qrp with indoor antennas here though I have an endfed which I can run a little more power. This works ok on 30 & 40m.

    73 Ian

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