[Elecraft] OT: High RF currents in small TX'ing lopps

[Kenneth A Christiansen]

Hi Ken

I have had the MFJ 3 foot loop for several years. I am now using it to receive only as it has a better signal to noise ratio than my Hy-Tower vertical. I found the SWR drifted badly due to changes in temperature caused by sun light and the environment. I felt it was much more stable at night so I did not feel the heat caused by 100 watts of RF was making a problem The changes in SWR are not noticed by my receiving experience. I hope my observations are helpful to you

73

Ken W0CZ

Sent from my iPad

On Jan 1, 2013, at 4:19 PM, Ken G Kopp <kengkopp at gmail.com> wrote:

> Small transmitting loops by their very nature involve high levels of
> current flow and this can/will cause "ordinary" variable caps to heat,
> which results in tuning drift.