Jim, I know of a source that I used when I had my antenna company for Type "F" female "T" connectprs. It's not Amphenol and I don't know if they will sell to an individual. Maybe they'll send you a s
Pete, Solenoid baluns have their place in our antenna systems. They are relatively inexpensive and easy to make. The principle problem with solenoid baluns is that they are "sort-of" narrow band. If
Hi Mike, In my opinion, the best material for sleeve baluns is type 73 material, the same as recommended buy W2DU. The 77 material is like a resistor! BTW, the balun that WX0B sells I believe is a co
Chuck Etal, The "W1JR Balun" uses a 2.4" OD ferrite core. The winding consists of 12 turns of RG141 or RG303 (the later recommended) teflon coax in a "contra-wound" fashion. This means that half the
Hi Tony, You can surely do what you suggest. The 12 turn one on a 2.4" OD 61 material toroid is very good from 40-10 (and even to 80 meters) meters with high impedance and no resonances. To get to 16
Dick, There is a company in Twinsburg (?), OH that can supply 2" wide copper strap in any length. I think it's called Metals and Cable Company and they advertise in QST. I have bougth several hundred
Dave, You'll have to somehow figure out the resonant frequency (perhaps with a grid dipper) but the TB trap is tuned near 21.5 MHz and the TC is tuned slightly lower at approximately 21.3 MHz. Hence,
Fred, I did some crude models of the SteppIR 4 Element Yagi. The assumptions are that these are the TYPICAL compromise settings they program into the design. You can take that any way you like. All b
Jamie etal, M Squared has been hinting for sometime about the reliability of the connector. In fact, their tech service recommended to me over a year ago to just cut off the connector and solder it d
Hi Steve, In 1990, I measured the Q of the LCA loading coil on the 40-2CD with an HP "Q" Meter. It measured a Q of 210 with C of 39 pFd. and parallel (or Rp) of about 108K Ohms. At 2.52 MHz it had a
Blake, This is a most ridiculous statement! Leave the trap caps off if you want ....and forget about antewnna performance. The caps are added capacitance to tune the traps. If they are gone, all bets
Rich, Although it is slightly smaller and slightly less gain, I'd also give a look (see WX0B website) at the Calav 2 element ZL special type 40 meter beam. From what I've seen, it is very well constr
Ken, I'd say (looking at mine from afar) about 18-24" of sag at the ends. BTW, if anyone is interested in purchasing a D40, a friend of mine has one in an unopened box that he wants to sell (now lack
Ken, It should work fine just as is. If you're a purist, you'll have to optimize it by adjusting the tubing lengths between traps (and the tip for 20 meters) to center lowest VSWR on your favorite fr
Kris, One solution is to enclose the control cable in ordinary EMT lying right on the ground. I did this on a 30 foot section with 3 10 footers and couplers in the area where the varmints were active
Gene, According to Brian Beezley, K6STI, this long Yagi antenna was designed and optimized with his YO (Yagi Optimizer) software. In fact, the program has the "W6TSW" antenna in the demonstration fil