I am building a new station at my vacation place in Northern CA. I will run a C-31XR for 10-20 meters, and want to stack a 40 meter yagi with the C-31. The rotor will be a Tail Twister. The station w
A 29 ft boom on 40M is only 0.2 WL which maximizes at about 7.0 dBi for a 3L design. F/B can be tuned to over 20 dB but is not really a benefit for domestic contests. A 2L design on a 20 ft boom can
... And not just in domestic contests, IMO. Radiation off the back can do a lot to keep your frequency clear in DX contests, too. Living in N. Cal, he can at least keep those guys down south off his
Should've used the Secret LXC Dimensions: split the difference between the cw and mid settings and it'll have optimum bandwidth. The 2:1 points will be 7.000 and 7.250 and will resonate about 7.075.
I'm going to use a prop pitch to do that. (C31 & 340N). -- Guy Olinger, K2AV Apex, NC, USA I will run the C-31. primarily for sloping is pretty yagi from about 22' of I have rotor, have gain than tho
Dear TowerTalkians, I have a Force 12 715 (15 meters, 7 elements, monoband). The hairpin match blew off. The only effect this has had that is noticable so far is that the resonance moved down to the
Dear TowerTalkians, I have a Force 12 715 (15 meters, 7 elements, monoband). The hairpin match blew off. The only effect this has had that is noticable so far is that the resonance moved down to the
Author: wesandlinda@triconet.org (Wes (N7WS) and Linda)
Date: Tue, 06 Feb 2001 10:42:43 -0700
Mighty strange. I would expect the resonance to go up, not down but this could be an effect of the transmission line length. Regardless, the performance shouldn't suffer. Wes Stewart, N7WS -- FAQ on
You mean the little coil at the feedpoint? (Yes, I think it's a sort of hairpin). It lets you fine-tune the swr by opening and closing the coils. Probably zip since the radiating parts of the antenna
A bunch of stuff snipped out: "2) I have to choose whether to use full size 40 meter elements, or to load them somehow (probably capacity hats at the ends of the elements. 4 2' spokes shortens the el
Not sure what the difference is between the F12 N elements and what they used on the Mag 340 but if it is similar to what was used on the Mag 340 be sure to design yours to a much stronger standard
My experience with the F-12 EF-340D, the predecessor to the MAG-340, seems to have been better. The original boom/mast bracket broke, much like the picture in QST (February?). I should have checked b