Mal and LF group, Thanks for all the comments on how to strip the Litz wire. I'm continuing to experiment and last night I placed a sample of the wire in my paint stripper for an overnight test. This
Hi Mal, OK on all your comments below. Just by coincidence I'm trying to strip the enamel insulation on this Decca Litz wire and just 5 min ago I ran across a posting by you back in Sept 12 of 2001 o
Mal, Before long two way on LF across the pond will be the norm !! 73 de Mal/G3KEV Yes, this is great! ...........and we will finally get the opportunity to show you guys over there how a TX loop bur
Mal and group, I was just pricing out various sizes of copper pipe at the local builders department store for the next "dream" (or is that "pie in the sky"?) loop antenna. Turns out 2" ID pipe is $18
Big fires US Big Loops and big 47 Amp Spark Loops coupled to trees I think I mentioned this could happen some weeks ago. Perhaps it is just a coincidence Nah, only verticals start fires!!! Really I h
Hi Jim and group, Jim, thanks for the picture of OH1TN TX loop setup. Not far off my "gone wild" scenario. With a few refinements like an elevated return and a lower Rac conductor that setup would bl
Hi Mike, fading Possibly due to lower output? No, I really mean fading, not weaker signal. The fading was typically slow - perhaps over 30-60 seconds. Very interesting! Therefore the location of the
When several UK stations used loop antennas, I noticed that they had fading at much shorter distances than those using Marconis. This was at about 300km, whereas Marconi users experience fading at ab
Hi All, I discovered the digital camera makes a nice scope camera. I'm trying to convert the pictures I have taken to black and white files with much lower information content so that I can place a n
You can laugh now, but don't say I didn't warn you to stay away from those antenna terminals once we start rocking and rolling over here at 136 - loopwise, that is! ........ because that's the only s
All, What pin #s on the parallel port are the correct ones to use for this program?? Bill A I am using Windows 3.11 with the QRS 3.17 program and keyer design that comes with the program. I have trie
Mike, I bought "Commercial" brand fluorescents for the whole house and I didn't notice any huge LF noise increase. They are not any louder on the natural Radio receiver either. You guys must have a d
Andy, This filter is shown in the LF Experimenters Handbook on page 25, as part of the outline design for a narrow bandwidth LF receiver. The frequency response I measured is given on page 26 A step
Hello Andy, Hugh, and all filter lovers, I'm concerned about the transient response since this is the REAL measure of a good filter. How does it respond to a step input? It could ring for minutes! Hu
Alberto, Good to see you now have a waveform. I'm not too fond of your oscillator circuit since it depends on the internal capacities and beta of the transistor to work (and these are highly dependen
Alberto, I am just starting to play with this simulation tool and have a basic question. I modeled a simple oscillator, with a 2N2222 and some passive components. If I simulate it with Electronics >W
Stewart, Does anyone know a good (UK) source of the above ferrite cores used in the K0BRA active antenna? Stewart G3YSX You may have a source right at home. Are you aware that the typical filtered IE
Hi Rik, Thank you for collecting and posting this information. The conclusion, therefore, (and for those not having the time to study this) is that at least a moderate loss of signal signal occurs wh
Steve, It "works fine" to be sure, and it's possible that this is the only physical shape possible for your surroundings, BUT did you verify that there is no loss from drooping the top hat radials Vs
Hi Geri, Do not be tempted to droop the ends of any top wires. ... I challenge that. My umbrella antenna 18m high with 5 pieces of top-load radials sloping downwards (each about 7 m long) **works fin
