Well, I guess I didn't really learn as much as I thought I did. I took your advice and modeled a 450 MHz dipole instead and got a curious result. I split the dipole into 31 wires each 2mm thick and
I just posted the following update to the QRZ.com forum, which includes a picture of the dipole and dielectric sleeves: Dave AB7E ** As best I can tell, NEC2 and NEC4 simply produce errors for part
I fully agree. I don't understand the point of swaging when an inside coupler is an extremely nice fit, leaves a uniform outside diameter, and for the same amount of strength has no additional weigh
"A more interesting question is why are you seeing the stickiness." Yes indeed. My guess is that unless the relays are truly hermetic (which I doubt), some amount of moisture has penetrated the casi
All true. The only Prosistel rotator I know of that uses a Hall Effect digital sensor is the big one ... the PST-110D-Pro. As far as I know all others use a potentiometer, which is DC at low curren
I wonder what happened to it. K9LTN is an expired callsign. Dave AB7E John KK9A Too bad, that DB-42 is a lotta $$. $13.5K, plus shipping, all in with various options. One fellow emailed me, who ha
It would be interesting to know what the failure rate of Steppir yagis is over a ten year period. Everyone I know of that has one has had one or more failures, but then again we probably don't hear
Somebody with more cents than sense. John KK9A _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://l
That's not actually true. Stacked yagis are only optimized at one frequency, but they are pretty tolerant of that spacing. LOTS of hams have stacked multi-band tribanders and they do have worthwhil
I've used that stuff quite a lot, although I usually put a layer of teflon plumbing tape over the connector itself first in order to make sure I can remove everything in the future. Hot glue isn't a
If your looking for a mostly foolproof construction for a homebrew 435 MHz satellite antenna and have access to a 3D printer, you might check this out. It's a weak choice for general 70 cm terrestri