To All from PA0SE Sometimes a fellow amateur tells me he would like to become active on LF and asks my advice. I tell him/her to buy The low frequency experimenters handbook and/or the older Source b
To All from PA0SE Hello Richard, Dick, PA0SE, has developed a small receiver using a ferrite rod antenna. Maybe you can use it to locate QRM sources. Download (as WORD document) : http://www.veron.nl
To All from PA0SE The radiation resistance of a multiturn loop is : Rs = 31200 x (n x F / L^2)^2 where Rs = radiation resistance, n = number of turns, F = loop area, L = wavelength. For my loadingcoi
To All from PA0SE A simple system combining the flexibility of a VFO with the stability of a quartz crystal is a V FO + "Huff and Puff" frequency stabiliser. This device frequency-locks the VFO to th
To All from PA0SE 1) When you state that the Radiation Resistance of a loop antenna is proportional to the square of its Area, you are of course quoting the accepted formula, but you will remember th
To All from PA0SE In a previous e-mail I reported that downloading EasyGram 1.21 from OK1FIG's website went so slow that I gave up. I then received an e-mail from Ko Versteeg, NL9222, reminding me th
To All from PA0SE Interesting material (simulation programs) for antenna freaks can be found at http://www.qsl.net./wb6tpu/swindex.html . It is called the "Unofficial NEC Archive". 73, Dick, PA0SE
To All from PA0SE- Bob Vernall wrote: You could check for leakage on the antenna wire with a "megger". You may also have induced losses in the wall of your house and loss happens to vary with moistur
To All from PA0SE Dick, maybe today I'm a bit denser than the usual. If your RG213 cable was terminated on its typical impedance, shouldn't the SWR have been 1:1 ? The 50 ohm resistor at the end shou
Dick, where did you get that Wayne-Kerr-B.601-bridge from ? could one purchase it somewhere? I have two Wayne Kerr admittance bridges: Type B601: 15 kHz - 15 MHz Type B801: 1 MHz - 100 MHz But my ho
I have made a start on the digest of technical material on the e-mail reflector. This first bit concerns active antennas (the one of the Decca antenna amp kindly redrawn by John, G4CNN). I would be
To All from PA0SE To measure the total resistance of my aerial system I can use a Wayne Kerr admittance bridge type B.601. To do that the bridge must be connected to a generator and detector. A metho
Hello Peter, The diagrams look fine using Internet Explorer. They appear on a white background. Thanks for a fb initiative! 73, Dick, PA0SE I have made a start on the digest of technical material on
Hello Ruddy, That was the source of my information! 73, Dick, PA0SE -- Oorspronkelijk bericht -- Van: [email protected] Sommereyns Ruddy Aan: [email protected] rsgb_lf_grou
To All from PA0SE It has been mentioned several times that the input stage of an active receiving antenna is easily damaged by lightning in the vicinity due to the very high input impedance of the am
Dear Martin, At my location, about 10 miles from the coast and 40km SE of Amsterdam I hear LORAN during daytime, when the local noise level is sufficiently low. Suggestion: First tune to 00kHz to lea
To All from PA0SE Our switching should be in the 'live' side in the UK, I wonder if Dick has a tube switched in the neutral line. The straight fluorescent tube above the the kitchen sink has its own
The Osram Dulux EL Economy low energy fluorescent lamp spreads some terrible noise on 136 kHz. Substituted it with a similar lamp from Philips which proved to be much quieter. /sm6pxj Mine is a Phili
