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All very cool. I'm trying not to end up with a Doc-ian pile of stuff. Easily collapsible, multi use, just a few cards of wire and some small circuit boards holding various loading coils.Local 10m net is tonight and I hope to be able to run out to the local park and set up without a kitchen sink in tow.TimoRu wrote: I once had a little 20m MFJ CW/QRP rig. Antenna was a coil of wire that I strung across the trees and had a contact with a guy in Kansas from the Appalachian Trail in NC. Several people going along on that trip had a thing about mobile packet (i.e. computer networks on ham radio). Got some funny looks when we got to the camp site when we started pulling out laptops, battery packs, radios, and collapsible 2m antennas to see what nodes we could hit and check into the local voice nets. :)
During that time I also did VHF contests as a mobile station with a friend of mine on 6m, 2m, and 70cm single side-band (i.e., a.m. radio minus the carrier) with a big pile of antennas in the back of the truck.
Just so you know, a kitchen sink makes a nice counterpoise for an end fed half wave antenna.PoisonOakMagnet wrote: All very cool. I'm trying not to end up with a Doc-ian pile of stuff. Easily collapsible, multi use, just a few cards of wire and some small circuit boards holding various loading coils.Local 10m net is tonight and I hope to be able to run out to the local park and set up without a kitchen sink in tow.
Sounds like your are lucky enough to have a yard large enough to rig up a 40M antenna. My yard is barely big enough for a 10M antenna. which means I will have to obscenely creative if I want to get my HF rig to work on 80Ms.PoisonOakMagnet wrote:Hams are often great experimenters, it's part of the calling. "I could just fool around with a cell phone or the internet", right but we like a challenge, so we buy all sorts of fussy electronics bits, LMR240 coaxial cable and wind toroids (trying to remember if that was turn 29 or 30 .. or was it 28?) Picked up a Husky work light stand, removed top, and found it was a perfect 1" diameter. Got 24 inches of ID 1 Inch PVC and then some 24 foot fibreglass telescopic poles off ebay (~9$ from PRC) which are about 1.025 OD, so some sanding was required on the end of the pole and inside the PVC pipe. Enough so I can get about 2 inches of the pole end into the PVC pipe. The rest is a tiny cleat and pulley from West Marine (you can find all sorts of great rigging stuff there for everything, not just boats)hinermad wrote:I'm not sure discussing QRP (low power radio transmitters for the non-ham folks) is allowed in Doc's presence. Terms like "horsepower" or "kiloton yield" seem to be preferred.PoisonOakMagnet wrote: Looks more fun than my current projects - creating HF QRP antennas out of fibreglass poles, PVC pipe and junk I find on sale at the Home Depot. Can't seem to get a good impedance yet. Still working on it.
But seriously - what kind of antenna are you building? I haven't had much luck using PVC pipe for anything but coil forms. It's usually too floppy to support anything suitably long. But the elbows, tees, and other fittings are sure handy.
I had it all set up in a pretty windy spot today and found my 40m setting on multiband vertical was b0rked (infinite SWR) but 20m was fine with about 1.57 SWR. Good enough for listening to all those contesters going at it.
I had ordered a few poles back in Feb. which never arrived, so I ordered some from 4 seller accounts on ebay, they all arrived in about 10 days (all sellers are the same name and address in Shenzen) So Verticals, Inverted V, and a few other designs I'll be working on.