Hi all I have a HB 2-el 20 meter monobander on a 16 foot boom. I would like to add 15 meters to this antenna, but can't find any diagrams anywhere for such an animal. Googled it but no joy. Does anyo
I played modeling 2el dual banders a long time ago and I recall having success just putting the higher frequency Yagi in-between the elements of the lower frequency Yagi. It is easy to model and see
Why not take the measurements from a C3? I think it is just 2 ele on 20 and 15 with 4 on 10. On 11/28/2017 5:18 AM, john@kk9a.com wrote: I played modeling 2el dual banders a long time ago and I reca
In the wayback, (70S), I contested/dxed using a DB-54 Wilson on a 40' boom -- was interlaced 20/15 -- and, the 4 15M elements were inside the 20M. If memory serves me, this design was in the QSTreet
Anther reason to own AutoEZ. It can design a duo bander for you in about ten minutes. Stan, K5GO _______________________________________________ _______________________________________________ TowerT
Can it optimize for a specific impedance? In other words can it design an OWA? John KK9A Anther reason to own AutoEZ. It can design a duo bander for you in about ten minutes. Stan, K5GO _____________
Sure. No problem. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/l
Yes. John KK9A _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/list
Stan is a much better modeler than I am so in my case (4-ele 17m + 3-ele 30m on same boom, separate feeds) I would not say "sure, no problem." However AutoEZ can do some tricks that make working on m
There are a number of performance parameter choices for optimizing - gain, swr, & F/R are the 3 most useful for me of the 6 possible, over a range of frequencies of your choosing and weighting factor
If you haven't already done so, it's well worth chasing down the two interviews of G0KSC by N0AX that ran in National Contest Journal. 73, Jim K9YC _______________________________________________ ___
AutoEZ appears to be like AO/YO on steroids and it is pretty inexpensive. I wish that the product was around when I designed my antenna farm. I concur, it is really amazing what designers achieved by
I have the opposite trouble. The larger interlaced antennas are very common. But in a case where space is an issue a nice 2 element 15/20 would be nice Sent from my iPhone ___________________________
I have the opposite trouble. The larger interlaced antennas are very common. But in a case where space is an issue a nice 2 element 15/20 would be nice Sent from my iPhone ___________________________
<Why not take the measurements from a C3?? I think it is just 2 ele on 20 <and 15 with 4 on 10. to use the identical tubing schedule. Whats required is auto ez, NEC-4 and yagi mechanical to design th
<In the wayback, (70S), I contested/dxed using a DB-54 Wilson on a 40' <boom -- was interlaced 20/15 -- and, the 4 15M elements were inside the <20M. If memory serves me, this design was in the QSTre
I do not remember the 3el minimum in YO that is too bad. YO certainly was no user defined control of the impedance making an OWA design impossible. I did design a 2el OWA 40m Yagi in AO which worked
JimI am curious about why you are suggesting that one needs NEC 4 software to design a 2 el. duobander. FWIW I basically took a C-3 and removed the 10M elements, tweaked it with a model in EZnec (NEC
For a basic yagi, multiband or otherwise, NEC2 works fine. Where NEC4 provides an advantage is with unusual geometries and features in the ground. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie
Also, I try to avoid short element segments. FWIW, my SWR curves closely match NEC2. John KK9A For a basic yagi, multiband or otherwise, NEC2 works fine. Where NEC4 provides an advantage is with unus