Hi Ed, my only comment is that whilst Beveridge aerials are fine for wide
band listening, 136 operation does require a tuned aerial to reduce the
intermodulation effects in the RX of strong BC stations. This also applies
to the loop aerials, which should be tuned (resonated) for maximum
sensitivity to weak stations.
I am surprised you are having trouble with signals so far removed in
frequency from 136kHz. I have to contend with Rugby 16kHz 0.5MW and MSF
60kHz 50kW, Droitwich 198KkHz at 200kW, Loran at 300kms, and BBC WS on
1296kHz at 20kms and 500kW, and a local BC station on about 1215kHz 1kW at
2kms. None of these give any detectable problem on my Rx with a tuned
aerial. I do not have the need to use even an band-pass filter for 136. My
RX response has been sufficiently sensitive to receive the Canadian test
transmission from VA3LK and VE1ZZ.
My 70m long inverted 'L' is resonated with a 2mH 30cm diameter solenoid coil
tuned by inserting a single (BC rx type) ferrite rod.
I look forward to hearing you on your next expedition Ed.
Good Luck and Good DX
Cheers de Alan G3NYK
[email protected]
----Original Message-----
From: Ed Lesnichy <[email protected]>
To: [email protected] <[email protected]>
Date: 26 April 2002 09:01
Subject: LF: May 2-4 KN97LN Activity
Hello LF Group!
May 2, 3, 4 we will be active on LF from Machta (KN97LN) -
mainly at night
My Sunset 16:40z, Sunrise 2:10z
I continue to have the big QRM from:
Alfa(Omega) (azim~196 degr, fq ~12kHz, QRB~200km, pwr~300KW)
Chajka(Loran) (azim~240 degr, fq~100kHz, QRB~450km, pwr~800KW)
Radio Chechnya(AM) / Radio Rossii(AM) -
(azim~168 degr, fq~170/1190kHz, QRB~280km, pwr~150KW/2MW)
Direction to Europe - from 340 degr(OH) to 290 (I)
Loops's I can not cancel all at once
The best signal/noise gives beverage (probably I will make 2km) +
hi-order band-pass + adjustable(5...30dB) amplifier
Any idea abt my new RX antenna or RX configuration??
73! Ed RU6LA mailto:[email protected]
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