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@ Mike, Hello Mike ! Perhaps im missing something ? Normally that would mean it also has a different take-off angle compared to a Yagi. But..that is sadly not true. Though maybe you are trying to indicate something else ? As you know your antenna stuff...so im not sure if that is what you...

You wont benefit anything by lowering the antenna, most likley the opposite is true. There is no "magical" optimal height for horizontal Yagi antennas. I have a different opinion then BC Coyote...but maybe it depends a bit on your personal situation, the ground around your antenna certainly...

Hello, You put a hugh smile on my face ! As I dont think i have seen that before. Good idea thinking out of the box ! It reminds me somewhat of the sterba curtain... (though that is differently of course) . Anyway... I made a quick run using EZNEC: The impedance will still be high...

That sounds like a fun experiment ! I made a 2el bobtail curtain years ago... say 1/4 wave apart, with a phasing line... That must have been 20 years ago..and i only remember my somewhat dissapointment in performance. In all honesty...that could have been cause i didnt examined it into...

BC Coyote is absolutly correct. The only advantage I can think of would be its height. It could outperform other (smaller) CB antennas when placed on the same mast. As it can "see" further ...and it might rise above possible obstacles (compared to the other) They are easy to construct yourself...

You can just buy a couple resistors online...that doesnt need to be high quality. You can verify the impedance with any multimeter. I would recommend to get two 50 Ohms resistors. (not wire wound) So you can place them in series...and end-up with 100 Ohms. That way you can test either the 1;1...

That is awfull... I wish i was your neighbour so i could give a helping hand ! On the bright side...there is something "special" going on if you have other readings while not changing anything. That sounds like "mechanical" failure somewhere. First off all dont cut .. Leave it to the...

If you were to ask about an RF choke somewhere on social media ...you will have loads of people telling you : Not needed, never used one etc, and perhaps some will tell you ... Yes..it does makes a difference. It will also be one of those posts with a hundered replies where true knowledge...

Good to hear you almost have it up and running. If im correct, you tested the antenna horizontal 5 feet from the ground. Beeing close to the ground the SWR will have some inlfuence on SWR. The advice would be to tune the antenna for roughly 55 Ohms J 0 . If the antenna goes up the impedance...

Or maybe just very unlucky vibration .. I once had a one director element on a 6 meter beam (almost an inch thick, 22mm 1,5mm wallthickness and just 2,8 meters long) and it snapped each time again.. everything indicated it should stay up almost forever...but somehow it didnt. I honestly...

@ Brandon..Yes, you are good on track ! Some designs are a bit more forgiving when changing element diameter then others. Traditional "OWA" Yagis are rather forgiving. A good indicator would be the Q-factor of the antenna it self. That also means the antenna will be less detuned due to...

What I was aiming at with element diameter in consideration was more for the "direct fed" replies. Element diameter is (can be) of large influence in order to obtain 50 Ohms in a design.

Why not leave the gamma-match attached ? You can expect a bandwidth as can be seen here : https://cb-antennas.com/shoot-out/sirio-sy-4/ That is no problem for most amplifiers, besides the Sirio isnt constructed to handle hugh number of Kw's. I am a big fan of direct fed, but you will need to...

@nfus, I can imagine you must have had some fun to reach that conclusion. That is what its all about, testing...comparing ...gathering facts.. time well spend ! (And ps you are right, it is hard to beat the center fed dipole ! )

Hi guys, To get a rough idea.... attached is a center-fed 5/8 wave antenna at various heights (this is not an exact copy of the 5/8 wave gainmaster) so most likley real performance should be slightly down to what is provided. I think i have a model of the Gainmaster around somewhere, maybe on...

Yes, you can use 6061-t6 which is the most commonly used aluminium for antenna construction. Kind regards, H>

Im using one vertical, beats most if not all verticals i have had in the past. It does need a long supporting mast though hi. You can see a picture and dimensions here Ill keep an eye out for you, UK has been very loud with the present sproadic-E season !

That is not a problem... I could be of help. What I need from you: 1- The boomlenght. 2- element diameters and section lengths. (for example does the element contain 3 sections ...the centerpart 2 meter long 25mm diameter and the tips are 20mm in diameter to complete the element lenght...

I dont know the antenna.. But.. Is it a 6el flat beam ? If so... it would be possible to design the antenna by using the element section lenghts and diameters from scratch. Im pritty sure that will be better then the original dimensions. If its like a 2x3el. (Ver/hor) im not to keen on providing...

JRC JST 245, just a lovely radio....performance.. looks.. and can still compete with present day modern tranceivers. and for CB thats more difficult...just pick one u said ...hmm.. i guess the Superstar 7000DX. From a "nostalgic" point of view... that radio has ultimate CB-radio flashing...