[Elecraft] Elecraft AX-1 Whip Antenna

[Jim Brown]

Wayne is quite proud of that antenna design for its intended purpose, 
walking/biking portable. We chatted about it at Visalia when his design 
was still on paper.

73, Jim K9YC

On 9/19/2022 10:53 AM, David Gilbert wrote:
> 
> 
> A comparison to any other antenna would be useful.  A comparison to a 50 
> ohm resistor with a similar counterpoise wire would be even more useful 
> as a baseline measurement.  If anyone wants to lend me their AX1 I will 
> do that.
> 
> 73,
> Dave   AB7E
> 
> 
> On 9/19/2022 10:33 AM, Ron Gruner wrote:
>> I've been impressed by how well my little AX-1 whip antenna performs 
>> on 20
>> meters. Here's a photo of the rig: 
>> https://gruner.com/k4rhg/andover_ma.png
>> and the propagation map: 
>> https://gruner.com/k4rhg/wspr_2watts_sep16_2022.png
>>
>> A friend, Derek Rowell (AK1WI), gave me a two-watt WSPR kit he had 
>> designed
>> -- easy and fun to build. I connected the unit to the AX-1 sitting in a
>> window sill facing west and strung the out-of-the-box counterpoise over a
>> lamp shade and bed headboard. No idea what the SWR is, but it must be
>> pretty good.
>>
>> I immediately began receiving propagation reports and within 24 hours had
>> reports from 240 unique stations. The farthest was VK5ARG (17,276 km) 
>> with
>> a SNR of -21. Even though the window faced the west, propagation into
>> Europe was strong with SV9KI (7,800 km) reporting -26 SNR. The
>> propagation report is from http://wspr.rocks/  <http://wspr.rocks/>
>>
>> I've found that WSPR is a great way to evaluate antennas. The AX-1 seems
>> to be performing very well.
>>
>> 73,
>> Ron Gruner
>> K4RHG
>>