Hello all, I am looking for information on the Siemens D 364 selective level meter. A circuit diagram should be most welcome, but a block diagram should also be nice for a start. Thank you in advance
Hello Jim, I have seen a message that this transmission has been cancelled. And yes, your mini-whip will do. I even used it with Johan Bodin's great program directly fed into my soundcard. Best regar
Hello Gary, Though this is a nice site for thunderstorm watchers, it does not cover the main source of wintertime QRN: the Mediterranean! And yes at the distance it is still causing a lot of trouble.
Hello Roger, Yes, they are! Canadian NDB's were coming in as early as 18:40 UTC. I also received NAVTEX, Yokohama, Japan on 518 kHz for the first time ever. 73, Roelof Bakker, pa0rdt
Hello Jay, Regarding conditions, these have been really awesome the last few days. I have logged my first NDB from BC (ICW-525, Nenada near Fairbanks) and also heard 20 new Canadian NDB's since the s
Dear Andy, Thank you very much for your educational piece on the signal to noise improvement possible for various modes. It might interest you that I have been testing the limits of aural CW copy usi
Hello Alberto, I have used a large coffee tin (30 cm high and 27 cm diameter), for a passive electric field probe. The capacitance was way to high for active circuitry. Instead a rf transformer wound
Hello Peter, Have you also been looking into the performance of bifiliar wound common mode chokes, e.g. 15 turns on the popular FT-37-43 Amidon ferrite toroid? These come in handy for receiver applic
Dear James, I think the role of the ground with active whips is often neglected - the output of the whip preamp is the voltage differential between the whip element and the circuit ground, so the gro
Hello Peter, Thank you for your answer. I have used one at the input of a broadband pre-amplifier for a MW Dx-er and it reduced the noise and signals received on a 50 m long coaxial feedline of a KAZ
Hello Ken, I don't think that it is neccessary to use protection diodes. Just try it and when it goes wrong it will only cost you a cheap FET. 73, Roelof, pa0rdt
Hello Stefan, This sounds quite interesting. An other option is to use a twisted pair of CAT5 network cable and rf-isolation transformers at the antenne and receiver end. The power for the active ant
Hello Stefan, Thank you for your detailed description. I have carried out the same tests some five years ago and arrived also at a length of 30 cm. The wire can be replaced by a 30 x 40 mm piece of c
Hello Ken, Coupling to other antennas is very light, so the position you mentioned is no problem I think. It needs a little height to work proberly, the minimum is about 3 metre. Coaxial cable length
Hello Andy, Have you tried to mount it on a four metre high non metallic pole? It probably is still inside the noise field of the building, which drops off within a few metres. 73, Roelof Bakker, pa0
Hello Warren, Sorry, yes it is /6! I have not been listening much on 500 kHz as conditions have been absolutely raving since the start of October 2009. Too busy listening elsewhere! 73, Roelof, pa0rd
