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Thanks-- I did post the results of the tuning but I thing everybody's gotten tired of that thread. I'm shooting for this weekend getting the shack moved and coax routed into the house.
Rick
This doesn't have much to do with radio except for a scene at WOPI in 1935, but author Sharyn McCrumb's new book, "The Devil Amongst the Lawyers" is being released next week.
The publisher (the same one that published "The DaVinci Code") finalized the website for it over the weekend...
I'd recommend using RG8-X instead of RG-213 for a dipole. That's going to be a lot of weight in the middle and if it's only supported on the ends at 20', the antenna could probably also double as a clothesline.
My 80/40 trap dipole has been fed with about 80' of RG8-X for years without a...
WHEW! Tuning finished.
This was an adventure.
Long story short, I chased that 65-69 ohms all over the 20 meter band. That would have been OK, but it just didn't make sense to me that the feedpoint impedance of a 2 element yagi at 1/8 wave spacing (roughly) would be that high with the...
Good advice from Doc.
If you have enough room for those antennas, have you considered a fan dipole or a maypole type arrangement? An 80 and 40 meter dipole fed in parallel with the ends separated a bit will give you 80/40/15/10, and will be cheap. That was my only antenna the first couple...
Reasonable question.
That may look long, but it's not excess. The feedpoint terminals are 4" apart and the center conductor and shield have to be able to reach that from where the coax is flat against the boom without putting stress on either themselves or the feedpoint screws. If you look...
Tuning so far--
It's too hot up there right now for both me and the 259-B, but so far the 20m tuning is coming along nicely. First test resonated at 13.695, I have it at 14.115 right now- 65 ohms, x=0. Changing the position of the shorting bar doesn't make much difference unless I move it...
With all the delays it took forever to get to this point, but it’s finally in the air!
Only 20 feet up until I get the feedline connected, then I’ll tune it at around 24-25 feet. Other antennas have not shown a huge difference in tuning between that height and 33-35 feet, so I’ll hope...
OK, back on it today after a few days of plumbing and some other household emergencies.
Hairpin match and mast-to-boom bracket in place:
The match itself is 7x22 antenna wire, shorting bar just 14 ga solid copper soldered to two alligator clips to make adjustments easier. I can either...
This is turning out to be a long project because of the rain delays, but I decided to change the plywood mount for the driven element also to angle aluminum. 1 x1 x 48”. Getting ready for Plan B:
Feedpoint now- the 20m driven element stays in a straight line on top of the pole, while...
Yep, that fence wire is tough, but I don't think I'd want to use it on just anything! Certainly has a mind of its own.
A few questions-- Is this going to be an end fed wire? Horizontal or vertical? If horizontal, will it be bearing its own weight (supported in the middle somewhere)? Will...
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