Has anyone with poor soil considered or tried adding a few hundred square feet of cheap galvanized wire mesh on the ground beneath the FCP to reduce ground losses? I suspect improving the near field
It would be interesting to see if a 75' x 4' run of galvanize poultry fence laid on the ground beneath an FCP affected the R ground losses, as seen on an antenna analyzer. I read the ground losses we
Why would bonding the added matting be required if it is laid over or beneath an existing radial field? It reduces ground losses regardless. Peter _________________ Topband Reflector Archives - http:
Hello to the group. I installed a K9AY system last week and added four 21 foot radials on ground radials with a ground rod at the center. The antenna didn't seem to have much directivity, so today I
Is there a schematic available online for the YCCC preamp? I see DX Engineering is long sold out of kits and I'd like to try dead bugging a few amplifiers to play with. Pete _________________ Searcha
Adding four cheap 3/8" 4-ft TV ground rods--one at each of the ends of each of the 21 foot radials-- did the trick. The lone ground rod at the hub was not enough. Now have good deep nulls in all 4 qu
Gary. if you are still reading this thread. I have a very early K9AY loop and mast kit. I believe my relay box was the second version where you went from DC/AC control to a three wire DC relay voltag
Regarding 10 kHz harmonics from BCB stations... last year I was using my HQ-140 receiver for casual SW and ham monitoring at my computer desk. With a full size 160 meter the Hammarlund overloaded to
For comparison sake... my inverted L measure 19 ohms over a K2AV FCP. Increasing the vertical wire height gained another several ohms... ended up with an R value of 26 ohms at resonance (no reactive
I made my own. There are tons of plans on the internet for spud launchers or antenna launchers. The designs are basically the same. It costs around 60 bucks to make one, only because you will end up
Some of the cheap imports may be metric thread. Regarding N or UHF, I've switched to good quality crimp fittings eons ago, and if one buys the proper prep and a quality crimp tool they are very relia
A drain resistor would be advisable if there is no DC return path to earth... if there is no inductor or resistance between the antenna and earth it can develop wind or snow induced static voltage bu
I'd avoid the TV splitters, quality is all over the place and the lower frequency limit varies. You would really want to measure the loss at 1.8 MHz before committing to use one. I've been playing ar
This is a manly solution for launching antennas... just load a frozen carp and you can cast your antenna line 300 yards! If the carp gets stuck in a tree, the birds will take care if it. https://www.
Those SWR readings seem to indicate a very large bandwidth, to the extent it might suggest that your ground resistance losses are swamping the antenna R radiation resistance. It would be nice to know
Todd If you are interested in experimenting, you could try a K2AV folded counterpoise under that inverted L. If installed as recommended, it will provide a decent counterpoise system. One advantage t
Hello You want the elevated radials as high as possible. 3 meters is probably as low as you would want. 5 meters would probably be optimum. To be effective, the radials would need to be resonant, and
I would think adding radials would lower the Radiation resistance. Also, the SWR curve should narrow as ground losses are reduced; since the effect of ground loss resistance swamping the results less
I recall hearing FT8 activity on 1830 kHz last evening ... isn't a bit low in the band for digital modes? I hope FT-8 activity doesn't squeeze all of the CW activity down into the DX portion before t