In my club we have a Cushcraft 40-2cd antenna. We are very satisfied with this antenna. Recently, one of our members, donated us a second 40-2cd. We have not a tall tower to put them in phase (the an
I have OptiBeam 40m antennas and when playing with a model, adding an element really did very little. I do not recall the details but I think some things like SWR bandwidth were even worse. You are p
On 3/6/2018 1:57 PM, john@kk9a.com wrote: I have OptiBeam 40m antennas and when playing with a model, adding an element really did very little. I do not recall the details but I think some things lik
Author: Mpridesti via TowerTalk <towertalk@contesting.com>
Date: Tue, 6 Mar 2018 17:53:58 -0500
I built one using a longer DE (55 ft) and changed the 402CD elements to a director (old DE) and the reflector. The boom used was 3 inch OD x 42 ft. Had I stayed in my old QTH, was going to use two 40
Kostas, As others have said, it is all about boom length with 3 elements. I built a W6NL Moxon (scratch design) and have a custom 3L full size 40m on a 48' boom. Moxon is at 92', 3L at 140'. Needless
I think you would be much better off converting it to a Moxon. I agree with KK9A. The boom is too short and not substantial enough that I would want to lengthen it. John KK9A In my club we have a Cu
With one antenna at 72 ft why not just add new antenna lower on the tower>? The boom is too short and not substantial enough that I would want to lengthen it. John KK9A In my club we have a Cushcraft
If your 3el 40m F.S. sounds like a fantastic beam however if it had tiny Cushcraft loading coils you probably would not refer to it as a flame thrower:) The Moxon is a great design and it eliminates
Author: Tony Brock-Fisher via TowerTalk <towertalk@contesting.com>
Date: Tue, 6 Mar 2018 21:04:46 -0500
I replaced a 40-2cd with a scratch-built copy of the W6NL Moxon. Although I was replacing a 2-element antenna on a 22 foot boom with another 2-element antenna on a 22 foot boom, It was a night and da
Author: Tony Brock-Fisher via TowerTalk <towertalk@contesting.com>
Date: Tue, 6 Mar 2018 21:25:38 -0500
If I recall correctly it is also resonant on 10m which may cause some interaction issues. John KK9A Mine is about 10 feet below a KT36-XA. No interaction issues on 10m at all. -Tony _________________
You're probably right about coil losses. Re putting up the Moxon. It took careful threading of all the aluminum around the mast even with a boom lift, which is how I got mine on a HDX589 lowered. The
My NEC2 model (which is not 100% accurate) shows <2:1 SWR on 23MHz so it's probably OK on 10m and 15m. John KK9A If I recall correctly it is also resonant on 10m which may cause some interaction issu
Author: GALE STEWARD via TowerTalk <towertalk@contesting.com>
Date: Wed, 7 Mar 2018 17:05:39 +0000 (UTC)
See the info at the following link. May be of interest. I have not done this mod to my 40-2CD but I may do this in the future. 73, Stew K3ND VE6WZ VE6WZ From: Grant Saviers <grants2@pacbell.net> To:
About a year ago I was given something like a 403BA antenna, I was told. I have had the Cushcraft 402BA in the past but never knew there was a 3 element version. The antenna is all tied together in a
Author: k7lxc--- via TowerTalk <towertalk@contesting.com>
Date: Tue, 13 Mar 2018 12:54:18 -0400
One of my all time favorite ideas. Stacked would give you similar performance to a full sized 3L plus you get angle and directional diversity. And you don't need expensive rotators! Like my o
Author: k7lxc--- via TowerTalk <towertalk@contesting.com>
Date: Tue, 13 Mar 2018 12:56:49 -0400
over 2:1 in the phone band, or vice versa. Actually if you use the LXC Secret Dimensions, the 2:1 points are 7.000 and 7.250! Cheers, Steve K7LXC ________________________________________
I respectfully have to disagree with Steve on this. Stacking with a lower antenna is highly unlikely to produce a lower wave angle. So a Full-sized 3L will still be almost always superior to a 2L at
Stacking with a lower antenna is highly unlikely to produce a lower wave angle. I agree with all of Bob's post, taking into account that he's talking about 40M. Steve may have been thinking of higher
The original post was about making a shortened 3 element yagi. I would think taking the aluminum and making a full size 2 element might give more bang for the buck. John J. Nistico 911 Electric Inc.
Two shorty 40's can work amazingly well together however I also disagree with Steve only because of the 1/8 WL stacking distance. John KK9A I respectfully have to disagree with Steve on this. Stackin