I would expect absorption and scattering to be greater with the tree material parallel with the electric field. I no longer have access to the neat little kit that we used to teach this sort of thing.
As I recall the students all assumed that our parallel wire grid acted as a cage to keep the waves in rather than warming up as an absorber. Perhaps someone is still teaching this and can give a proper experimental answer.
73,
Rod
PS lovely piece of work that wood based Yagi antenna Andrew illustrated; no idea which Andrew or where I found that, so commenting here,
Hi Matt, that’s right, I was looking for a break in the trees. I set up about 7 vertical metres below the top boulder. The 25 metre AZ is halfway down the trail before exiting on to North Black Fire Trail. Loads of vertical space to find the best signal path out of the scrub.
It was thanks to your alert that I ventured out to my local summit to try and make the S2S.
I managed 15 contacts on 23cm in 90 minutes during my activation.
My thanks to you for the S2S and another “summit complete” for me.
73…Stuart
G1ZAR/P
I have an Alinco DJ-G7 and would like to buy another one (You always have to have some spares!). To my knowledge they are no longer sold as new equipment, at least not from the usual dealers in Austria or Germany.
Does anybody know a vendor for a new Alinco DJ-G7?
Is there any other triband handheld or mobile transceiver available right now?
