From G3PLX: Uwe: I am not an expert on LF power-amplifiers (I worked on 10kW HF power-amplifiers 40 years ago but not recently), but it looks to me that the voltage and current waveforms of your home
From G3PLX: Checking across the LW band, most of them seem to be some fraction of a Hz off. On 162 there's one which is spot on, but another about 0.32Hz high. I don;t know which is which, but certai
From G3PLX: Bryan: The story, as I heard it from a Polish old timer, was that during the last war, in countries occupied by the Hitler regime, it was decreed that telegraph and radio operators were t
From G3PLX: I am sure Jim is right to say "it's not quite true..". As I suggested in my reply to Brian, if a lot of the field lines just 'short-circuit' back to the top of the tower, then there isn't
From G3PLX: The important thing is to maximise the RF current flowing 'into the sky' and minimise the RF current which is just flowing back round behind you into the earthy side of your transmitter.
From G3PLX: Some of you may have seen my letter in the current RadCom, which suggests that reports of unusually good performance of the electrically-small 'EH' antennas may be the result of them bein
From G3PLX; My guess is that the abbreviation gdo meant good-oh and that 1 nr 4 meant one quarter. Surely "nr" is actually "dah-di-di-dah-dit", which we would know as "/", written as "NR" in the same
From G3PLX: On seeing the report of Droitwich being off frequency, I connected up my Clicklock set-up, which enables me to measure off-air signal phase relative to GPS. I have to run the system with
From G3PLX: Gary: You say you don't have a Q meter, but it's very easy to improvise one, if you have a means of generating RF at 136kHz and a means of measuring RF voltage. Set up your LF transmitter
From G3PLX: I don't know about earlier versions of Windows, but it's certainly possible in XP to open a soundcard for input in one program, and open the SAME soundcard for output in another program.
From G3PLX: JA: Using the figures you gave in your posting, and the IN3OTD variometer calculator quoted by Brian, I estimate that your variometer has inductance between 3.0 and 6.8mH. To do this, I c
From G3PLX: Alan: When the LORAN master goes faulty (or is turned off for whatever reason), the slaves blink the first two pulses at 3.5 sec intervals, which would show as a filling-in of all the spa
From G3PLX: Hi Peter and Alberto You can do that but only 65536 times. Why is Windows XP so restricted ;-) That's not a problem for me. The maximum number of programs I would ever want to run off one
From G3PLX: J: If the toroid in question is ferrite, i.e. a ceramic material, then forget about cutting it, especially if you want to be able to put the two halves back together again and still have
