To All from PA0SE Dave, G3YMC wrote: The noise canceller which Steve GW4ALG designed is derived from Harry PA0LQ's version with ideas from other sources - this can be found in the RSGB Low Frequency
To All from PA0SE Now that interest is shown in the PA0LQ audio noise blanker I will translate the article into English and send it by direct e-mail to those who requested it. It may take a few days.
To All from PA0SE Today I had good reception of SAQ on 17.2kHz. I used a Wandel & Goltermann SLM type SPM-12 connected to the aerial system for 136kHz with 26nF extra in parallel with the loading coi
To All from PA0SE Our national amateur radio society VERON every two years brings out a Vademecum (handbook, manual). I have been asked to write the chapter on LF. In the previous edition (year 2000)
To All from PA0SE The following is part of an e-mail I received from Murray, ZL1BPU. 73, Dick, PA0SE I have just about completed the design of an LF Exciter using a microcontroller. It is very simple
To All from PA0SE Several amateurs have requested the picture of my Hellschreiber. I will send it to them by direct e-mail. But I am pleased that Dave, G3YXM, has advised me that he has put the pictu
As I found that the reflector had passed only one of the attachments here the message again with the second attachment. To All from PA0SE, Following my Feld-Hell transmissions on Saturday 22 June at
To All from PA0SE, Following my Feld-Hell transmissions on Saturday 22 June at 1300 UTC and Sunday 23 June at 0900 UTC I received reports by e-mail with screenshots of my transmissions from Alan, G3N
To All from PA0SE, As recommended by Geri, DK8KW, I will use the frequency 137.400 kHz for the Feld-Hell transmissions. 73, Dick, PA0SE It is my intention to make a transmission in Feldhell on Saturd
Dear OM, It is my intention to make a transmission in Feldhell on Saturday 22 June at 1300 UTC and Sunday 23 June at 0900 UTC. I will be using an original German World War II Hellschreiber ("Feldfern
To All from PA0SE Jim, M0BMU wrote: Over the weekend I put a temporary counterpoise under my antenna, to see how much effect it would have and make some rough measurements. The counterpoise consisted
Passed on to the reflector at the request of CO2KK. 73, Dick, PA0SE X-From_: [email protected] Wed Jul 31 14:28:14 2002 Envelope-to: [email protected] From: "Prof. Arnaldo Coro Antich" <coro@ip.
To All from PA0SE, Many thanks to Andrew Talbot, James Moritz, Dave Brown, Alan Melia, Dave Pick, Markus Vester, Steve Dove and Ray Soifer for their reactions on my field strength measurement of Done
To All from PA0SE Andy, G4JNT wrote: I've just made a check of both Droitwich and Donebach transmissions using the WatKins Johnson WJ-8711 receiver here at work. Using the narrowest IF bandwidth of 5
Dear Walter & the LF-Group, Today I tried to measure the field strength of Donebach at 153kHz again. I am pretty sure Donebach uses some form of controlled carrier modulation, apart from the phase mo
To All from PA0SE, Sorry to bother you again with a field strength story. But the delete key is within easy reach... The Deutschlandfunk Donebach transmitter at 153kHz is on again. At 0840 UTC today
To Jim and the LF-group. At 1912 UTC I received M0BMU's signal with 42.5 microvolt over 75 ohm of the SPM-12. If I did my sums right this is -78dBm or S8 + 1 dB (S9 = -73dBm, S8 = -79dBm). Jim's fiel
