Gregg: I built split, hairpin match elements for my 80m Yagi. I have some photos at my webpage here: http://www.qsl.net/ve6wz/intro.htm Split elements are very easy to build using available plumbing
Paul: I know tower restrictions can be an issue in the USA. I also live on a city lot....only 100'X60' and am surrounded by houses just packed beside each other....I can read the label on my neighbou
Is there anyone out there who has **MEASURED** the Q of a Cushcraft 402-CD or XM-240 (shorty 40) loading coil. I have read quotes of around 3 ohms of loss, but some software inductor programs suggest
Mirko: Go here: http://www.qsl.net/g4vgo/ and see lots of great detailed info on balloon and kite supported top-band wires. Bob has a great signal on TB from his "high-flying" wires. 73, de steve VE6
This link shows some photos of the original CC 40m coil and the higher Q air core design: http://www.qsl.net/ve6wz/CC_coil.html Also included are some screen shots of the inductor calculation program
Robert: I have built a 2 el short boom, inductor loaded 80m Yagi with a 2 el 40 sharing the same boom. See my webpage for some design notes....maybe you can consider a similar design for 40. go here
Ken: I agree with Barry W2up......from experience the Yagi is a poor performer on 30m......it sounds dead, and trying to break pile-ups with it is painful at best. Hang a wire (inv. V.) or something
Ken: The replies you have received are ALL empirical. Empirical implies real life results. My experience....compared to a wire shortened Inv. Vee are that it is VERY poor in comparison. It loads fine
Bill: I do not agree with this. I have shunt feed my US tower 89' crankup as-is with no problem for three years....is there connection loss? I doubt it. The sections may have grease on them but I'm s
I have posted design notes and numerous photos of my homebrew 2 el, short boom inductor loaded 80m yagi here: http://www.qsl.net/ve6wz/intro.htm This is a reflector-driven model on a 28' boom with 66
Mike: Just let it hang. Skip the coax arms altogether. My coax and all control lines just hang from the top with a 3 foot standoff arm. My tower is down all the time except when QRV so it is going up
Mark: I purchased 5' of 1-1/4" fiberglass rod from McMaster-Carr this past May. I am using it to insulate the center elements and inductor splits for my shortened 80m Yagi. The rod was a perfect fit
The Balun on my XM-240, 2 el 40m Yagi has been severely overheating. This is the Cushcraft MNXM 1:1 balun which is a stack of three, 1.5" torroids wound with about 6 turns of teflon coax. The plastic
Pete: Interesting...the damage really looks like heat...it appears like the core stack just got VERY hot. I can't see any evidence of arcing or other high voltage effects. Unlike some others, I have
Many transmitting variables are "continuously rotatable"...ie. no stop. If you have, or can get one of these there is no worry about hitting the end when driving it with a motor. de steve VE6WZ. -- O
I have estimated the total windloading (14 sq ') of my antenna stack to be less than the max. recommended by US tower...this is a good thing. However, my total antenna weight will exceed the recommen
Playing with Roy's EZNEC demo to see if I like it. I currently use NEC4WIN95vm (MINNINEC base). Question: Can I create a simple graphic (line) plot of the F/B vs frequency ? (at "x" elevation angle).
I am finishing my MININEC modeling of a close-spaced 2el 80m Yagi. 68 foot inductor loaded elements, 28 foot boom. Reflector/driven configuration. These dimensions have been selected to fit on my sma
Gene: I think the main consideration here would be mechanical, not electrical. In fact, you could mount them BOTH at the same height. I have modeled my entire antenna system on MININEC and the 40m pa