[Lowfer] XGR/3 on 506.700 tonight

[Howell, Laurence (Shanghai/Singapore)]

I had a feeling it may be this sort of animal at 500 John, thanks.

Laurence 9V1LF

----- Original Message -----
From: lowfer-bounces at mailman.qth.net <lowfer-bounces at mailman.qth.net>
To: Discussion of the Lowfer (US, European, &amp;  UK) and MedFer bands <lowfer at mailman.qth.net>
Sent: Fri Oct 05 17:54:24 2007
Subject: Re: [Lowfer] XGR/3 on 506.700 tonight

Laurence,

> What sort of loop current you seeing John?

This loop is a very different animal up at 505 kHz, where it is just 
about a quarter wavelength long. The impedance at the point I'm feeding 
it is 62 +j1110 ohms, and I had expected something considerably lower. 
The antenna is not symmetrical around that feedpoint, and that may be 
part of the issue. The ground here is very dry at this point, as we 
haven't had any significant rain in weeks.

As to current, the jury is still out. My wire-through-the-toroid meter 
is not working very well at this frequency, probably due to stray 
coupling. As I've kept adding gadgets to the tuning network box, the 
wiring has gotten a bit odd. Anyway, I'll throw an accurately calibrated 
thermocouple meter in there in another week or so. Field readings will 
have to wait a while, but I'm in no danger of goosing 200 watts ERP!

JA

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