From Laurie G3AQC Just put 3 top wires on my Marconi T antenna instead of only one.No increase in antenna current,although I did have to re-tune to compensate for extra capacity.will just have to try
Radial=Counterpoise,usually several radials required if buried up to 120! but only one counterpoise so to be effective it has to be resonated-if short add inductance,could use ant tuning coil as sugg
Re. the ongoing discussion about radials etc. I once saw a 500 Khz installation which used a marconi "T" ant. with 3 top wires.Below was a counterpoise earth system which consisted of about 10 spaced
I have much trouble with a source of interferance centered on 98/99Khz.this appears to be a digital/data sort of transmission which spreads as far as 145Khz and which results in a high background noi
I am using a B&K Audio amp as a power amp on 136.But it runs out of steam rapidly beyond 100Khz.I can only get about 100W! Are there any mods etc to get more from this amp,or should I start again and
Thanks to Mike G3XDV and Lech G3KAU for advice re BK Amp.I now get 300 w after changing nfb components.Will have to change OP Tx as it now gets hot! 73 Laurie G3AQC.
I am plagued here on the coast by the Loran station on 100Khz located in northen France .The path to my QTH is mainly over water so sigs very strong even in our band. I needed to reduce the strength
No recent changes to my TX ant but xmit pwr increased to 250/300 Watts fron 29/11/99.So possibility is that any increase in sig strength due to this.Unfortunately my Rx ant was faulty, so recieved si
Tom, I bought some nice ribbed ceramic insulator from a Tandy store about 2 years ago.But havnt seen any since.I think they were a Tandy stock item and so must be available,just that most stores dont
Re. Insulators, it ought to be possible to check plastic by the same means as used for coil formers.Put a sample of the plastic in the microwave with a cup of water.Run for a minute or two, water sho
The report by Andre Kesteloot on 15/12/99 re LF propagation prompted me to read some old IEE journals of the late 1940s when there was much intrest in VLF.There are an enormous number of refs and I h
I should like to look at some slow CW transmissions.I have access to a gram program which I think is spectrogram.dll by R.Horne.But I dont think it is suitable for slow CW.I have tried to download sp
Many thanks to all who replied to my "gram" enquiry.I am still suffering from this Flu. bug so dont feel much like working on the computer or radio.Will try to sort it out when I feel better,thanks.7
Thanks to all who sent me advice re spectrogram.I have now solved the problem and of course it turns out to be "finger trouble",but all the information and advice was most valuable. I shall now be lo
Thanks Andre for your message re. spectrogram.All the advice I recieved was on this reflector,so I assume you have access.If not please let me know. Merry xmas and 73s Laurie.
Hello, The deadline for your comments about the new CQ Low Frequency Countries Certificate (LFCC) is on Monday 27 December 1999. After that date, the rules will be published in all appropriate bulle
