Re: [Elecraft] The "Kinda Random Antenna" (was: Random wire lengths for antennas)

2017-01-29 Thread Hajo Dezelski
Hi, have a look at this one: http://pa-11019.blogspot.de/2017/01/efhw-antenna-for-40-10m-qrp.html It works as indicated in the measurements. I use it for the other bands with the ATU of the Kx3 and Kx2. 73 de Hajo dl1sdz --- Cela est bien dit, mais il faut cultiver notre jardin. http://hajos-

Re: [Elecraft] The "Kinda Random Antenna" (was: Random wire lengths for antennas)

2017-01-29 Thread K9MA
There's an unavoidable tradeoff using an end fed wire with an ATU of limited range. Since the ATU can't match the high impedance of a half wave multiple, the lower impedance of the wire will lead to larger ground/counterpoise currents. Even with a decent ground and/or counterpoise, some power

Re: [Elecraft] The "Kinda Random Antenna" (was: Random wire lengths for antennas)

2017-01-29 Thread Matt Zilmer
For general low-band operation, I use a doublet that is 75 feet long on each leg, and fed via ladder line to a BL-2 balun near the shack. The fifteen feet of coax to the balun is low-loss LMR400. The low-loss coax helps with the high SWR problem, in that the losses are minimized (for what I c

Re: [Elecraft] The "Kinda Random Antenna" (was: Random wire lengths for antennas)

2017-01-29 Thread Barry
Cc: "Elecraft Reflector" ; "k...@yahoogroups.com" Sent: 1/29/2017 12:40:58 PM Subject: [Elecraft] The "Kinda Random Antenna" (was: Random wire lengths for antennas) I'd call an ad-hoc antenna that works on multiple bands with an ATU a "Kinda-Ra

[Elecraft] The "Kinda Random Antenna" (was: Random wire lengths for antennas)

2017-01-29 Thread Wayne Burdick
I'd call an ad-hoc antenna that works on multiple bands with an ATU a "Kinda-Random Antenna" (KRA). (Apologies to linguistic purists.) A simplified definition might be: A. long enough to work within the maximum limits of the ATU's L-network on the lowest band used B. presents a reasonably

[Elecraft] The "Kinda Random Antenna" (was: Random wire lengths for antennas)

2017-01-29 Thread Wayne Burdick
I'd call an ad-hoc antenna that works on multiple bands with an ATU a "Kinda-Random Antenna" (KRA). (Apologies to linguistic purists.) A simplified definition might be: A. long enough to work within the maximum limits of the ATU's L-network on the lowest band used B. presents a reasonab