The traditional method of tuning an LF loading coil is to use a variometer. I have been investigating methods of tuning coils for mobile use and one method that appeared briefly in one of the ARRL Ha
I keep one of those old fashion paper logbooks. I have recorded John W1TAG received my QRSS20 signals on 72.4kHz on 9/11/2002 and11/12/2002 both 'O' reports. Also recorded is Dex W4DEX on 12/12/2002,
While serving in the RAF in 1957 I was posted to Christmas Island for the British nuclear tests in the Pacific. During that time I was also stationed for a short while at the Transit Aircraft Flight
Many thanks to all those who informed me of the 'shorted turn' methods of tuning an inductance. Regards Peter, G3LDO Many years ago when I did 160m mobile I had a setup in which the mobile antenna ha
Dear James and LF group, I have one of these units but was unable to find out any info on the internet. I figured the DDS section OK and used it to set up the receiver for T/A tests some time ago. I
A search on Google indicates that the airplane shown in Mal's photo is probably a Lisunov Li-2, a Russian variant of the DC-3 built under licence. Some had 4-bladed propellers. Over 3000 of these air
Interesting photo Mal. It is obviously a DC3 but has four-bladed propellers and electrical leading wing edge de icing arrangement rather than the rubber boot de icing found on all the DC3s I have kno
In the early 1960s some aircraft in the RAF were fitted with Marconi ADF sets. The loop antenna was a slab of ferrite, which if my memory serves me right, was some 200mm x 120mm and about 30 or 40mm
Earlier literature such as: The Services Textbook of Radio (1958) ARRL Antenna Book 14th edition (1984) HF Antennas for all Locations 2nd edition (1993) describe a Smith Chart with the centre straigh
Jim's history lesson is spot on. I recall Mal describing QRSS as "lazy man's CW" Regards Peter, G3LDO G3KEV wrote: You have just verified what I have always said. Yes keep an open mind and experiment
Hi Roger I use a small notebook Archos 10 with Xp OS and a SignaLink USB box which has a data cable to the the FT-817 to run WSPR (used mainly for HF antenna comparative tests). The Archos is also us
I apologise for not getting back to you earlier Laurence. The WSPR setup was not connected up because I was using the FT-817 for something else. I dont have LF antennas any more but I checked for pos
Hi Graham, This base and removability issue is a new on on me. The lower section of my 40ft mast is made of 4in steel tubing and is stepped in a length of 8in casing fixed in the ground with concrete
Hi Graham, How the mast is fixed into the ground is irrelevant. The planning permission is just for the mast. There is no distinction between permanent and temporary in the planning laws to my knowle
Hi Pat, Thanks for the information on CLUED - mos interesting. As I previously mentioned my mast has planning permission with some restrictions, which I now ignore. I feel inclined to let sleeping do
