Stefan, Jim es Co I can understand the problem of going off Resonance with a large Inductor and short wire in Stefans case. This happens on 160m Mobile where the Loading coil is large and the top sec
Jim es Co It might be more efficient to use a single wire inv L at 100 ft high with a vy high Q 4000 coil rather than in my case 3 x inv L antennas with a low Q coil. Bandwidth could be a problem. I
Jim es Co The highest Q coils I have seen are self supporting encased in a helium container and the Q specified was only in a few hundred. What sort of coil construction yields 4000 and above ? I hav
Stefan Schäfer wrote: .......The first time in the season it is snowing here and so my system got strongly out of resonance, reducing the TX power by about 10 dB. So i hardly expect TA reports f
Dear Mala, LF Group, I avoid using a variometer which would degrade the main coil Q mala/g3kev This is a bit of a myth - A variometer by itself often has relatively low Q at the lower end of its indu
Tnx Jim That explains it, by adjusting the number of secondary turns in series with the main coill a match can be found. 73 Merry Xmas and HNY. You have not been active for some time expect you are b
Am 20.12.2011 00:49, schrieb James Moritz: [...] With a high loaded-Q antenna, small changes in reactance result in a large mismatch, and the continuously-variable variometer inductance allows precis
Hello Dex. Oh ;-) Maybe the snow came later than i expected ;-) That is the best reception i saw so far from you! Happy, thanks :-) That makes me optimistic regarding KU7Z :-) Today i replaced a part
