Hi Hugh I think the rule of thumb (or at least the one I use) is that the lowest turn should be at least half the coil diamter from the screen base (which if too close will exhibit the properties of
Thank you Alan, the location inside makes your suggested spacing, suspended and spaced on fibreglass rods. It needs more Tx testing as a few brief reception reports were about 5dB down but that was p
Hi Hugh,mmm that is quite a lot. Thinking of the copper lined tuning huts Decca and Orfordness I guess the keg should be grounded. ?? Alan G3NYK -- Original Message -- From: "LineOne" <dhchurch@lineo
It just sits on a corrugated steel roof which is grounded so a strap from keg to roof would also prevent any "diode" action when transmitting. I have just made s field strength device which will be i
Hugh, You have opened up a profitable new area of research with your use of a beer keg:-) May I suggest a moonshine (hard liquor) distillery for your next project? The condenser features a large copp
Takes me back to the 1970's when I was a student working for Gerald David at Aerial Facilities in Chesham building these things - http://www.ingenia.org.uk/Ingenia/Articles/240 which worked incredibl
Hi Paul I came across Gerald in the 90s when I was part of a 2-way radio company, my oppo knew Gerald quite well from the FCS. He was a nice guy. One of my local LFers worked for him as well. I have
As the aforesaid 'oppo' I would heartily concur with Alan. Gerald was a great mentor, super meal companion and wonderful raconteur. Also worth noting could be his unflinching support for Amateur Radi
There were two Powys Amateur radio Club 2m cavity resonators at a commercial transmitter location south of Newtown in Mid wales. They did have a tendency to drift off frequency, probably according to
There are at least two other LF list members who also knew Gerald, including a Chris McCarthy that I remember from AFL who I think may be G3XVL. Small world isn't it? Oops, we've well and truly highj