Dear Bernd, The screenshot shows the call of Jeff, F6BWO. The relation with VERON is not clear to me. But congrats on your QSO with Jeff. 73, Dick, PA0SE At 12:48 20-10-02 +0000, you wrote: Hi Dick,
To All from PA0SE Several reports on the Reflector show that following my request there was quite a bit of activity over the weekend, for which I am grateful. I don't know whether there are any conve
To All from PA0SE Tonight I'm going to deliver my talk on LF for the 10th time. It will be at a VERON radio club at a town called Schagen (NE of Amsterdam). I always tell my audience that the best ch
Steve, You can make a loop omnidirectional by mounting it horizontal. That makes it respond to the vertically polarized component of the EM field, so of no use on LF. Another way is to use two loops
Jan_Martin and All, You could use your loop aerial, together with a selective level meter, for field strength measurement on strong signals by using the coupling loop on its own with the tuned loop o
To All from PA0SE: Jim, M0BMU wrote: The un-neat thing about an oil dielectric is its propensity for catching fire... also, I don't think it has particularly low loss at RF - although a lot of big TX
To All from PA0SE I also use the series coil system for tuning and matching the aerial to the 136kHz transmitter. The coil was made by bolting four 1m long and 12.5cm diameter PVC pipes together and
To All from PA0SE An easy to adjust audiofilter can be downloaded from www.lsear.freeserve.co.uk/page2.html. It can also provide binaural (pseudo-stereo) reception of CW. If is does not work follow t
To All from PA0SE As so often Jim, M0BMU, came up with the right solution. He wrote: The "volume control" display seems to vary with different sound cards and drivers. It does not always show all the
Thanks to Alan, Uwe and Alberto for their suggestions and explanations. I will try to make use of them. Alan asked what sound card I am using. In one of the computer windows I found OPTiSound Plug-N
To All from PA0SE Some programs, like Spectran, have the possibility to make the processed signal heard via the PC speakers. But my problem is that the use of filters provided by the program does not
To All from PA0SE Jim, M0BMU wrote: I also find that external effects affect the depth of null you get - in my field strength measuring experiments, I found some locations where there was almost no n
To All from PA0SE RSGB's magazine RadCom of January 2003 features the first part of an article by David Bowman, G0MRF, with title "A Class-D Transmitter for 136kHz". As far as I can judge it is the s
To All from PA0SE Mike, G3XDV, wrote: I think this is why people are confused. I believe that Dick measured "system loss", which includes all losses except inductor loss. Calling it "earth resistance
To All from PA0SE Ralph Lane wrote: Dick, conventional wisdom says that the soil resistance becomes lower as the soil becomes wetter. However your measurements indicate the antenna ground loss become
Thanks John for a perfect reproduction! 73, Dick, PA0SE: Dick Rollema's noise bridge schematic and a photo of his assembled unit can now be downloaded from: http://lwca.org/library/articles/pa0se/ear
at 136kHz frequency Upon this Uwe, DJ6WX, remarked: but you use a noise source ie. not 136kHz only. does that not matter ? The noise source indeed produces noise over a wide band of frequencies. But
To All from PA0SE Jan-Martin, LA8AK. wrote: but suppose the values of the noise generator are for the range 3-30MHz, the coupling capacitors must be increased for VLF The noise bridge was indeed not
To All from PA0SE In my previous message I made a mistake in the formula for the reactance of a capacitor. In this repeat the correct formula is used. There were some requests for info on the way I m
