Topbanders, i recently built a K9AY-Loop ( switchable N/S E/W on a single Mast), but i am not satisfied with it's performance. I notice a good difference in signal when switching from the N/S loop to
Topbanders, thank you for your input. I had a lot direct mails, here is the summary: Try longer ground rod Try Radials The Minicircuit xfmrs should work The coax-cable must not have connection to gro
I would like to add: NEVER key your call again if you hear the DX coming back with your correct call. Martin -- 73, DM4iM _______________________________________________ Topband mailing list Topband@
Topbanders, while i successfully shunt-fed the tower at our local clubstation, i completely failed to do so with my own tower at home. It is a crank-up tower with tilt-base, maybe the sections have n
For switching the (hopefully soon to be set up) K9AY loop for our clubstation, a clubmember designed a circuit with a 4-position switch, an AC Power-supply plus some diodes etc. The AC is fed into th
One should check the message before hitting the send button. Of course, the box is controlled via DC, the message should have read: snip.. a *DC* Power-supply plus some diodes etc. The *DC* is fed in
A cheater might use a SDR somewhere as a receiving station and work DX despite a deaf radio, crowded band, key-clicks, local qrm or whatever limits his ability to copy that weak one he knows (from th
Topbanders, i set up a K9AY-Loop over the weekend and currently am testing it. I had nice Q's with W9ZR and VE3JM saturday night , both Q's were a joy with the signal wandering from one ear to the ot
Topbanders, i plan to try shunt-feeding my tower again, now with more experience and better measurement gear. I'm still far from being an expert, so here are a few questions: I have a Dip-Meter, Nois
Topbanders, thanks for all the input. Today i installed a shunt wire, a box with a vacuum C and the coax to the shack. I have 12 radials so far, none of them is long enough, but that is the best i ca
Topbanders, R and J are: Freq 1.820 R=54.6 jX=10.4 with dipole at operating height, connected to the system and tuned. R=35.0 jX=-4.8 with dipole at operating height and disconnected at shack end. R=
Topbanders, today i found that i need to ground both legs of my ladderline that feeds my dipole to make it sort of invisible to the vertical. Now, the swr-curve changes are small when i lower the dip
Topbanders, thanks to all who responded. Special thanks to Greg, ZL3iX, for the pictures. I connected the parasitic elements per his hints and the SO-239 plug at the radiator housing to the boom. The
Topbanders, i set up my K9AY again and i think i did better than last season. Maybe moving further away from the house did the trick. I layed out 16 radials slightly longer than the loops. They are b
For those who intend to build the FCP INV. L. with a T-200-2 (or an antenna tuner). Me and a few guys from our club wound different types of baluns and chokes on different material and measured them
The link works if you manually add the missing letters you did not copy/paste , e.g. ail to the word Detail www.balundesigns.com/servlet/the-108/1-cln-1-High-Isolation-balun/Detail -- 73, Martin DM4i
Topbanders, i recently bought an old Knwd TS-520S. I am very surprised how well this rig hears, especially on topband. The CW filter however is the stock knwd filter and leaks close spaced signals. I