Picking the "best" 40m beam is very hard on 40m and requires a compromise unless you have a big tower, a big rotor, moderate wind/ice exposure, height limitations and CW/SSB only vs. wideband CW+SSB.
Jim, The 4sq is a great antenna but the yagi beats the 4SQ almost all the time, and often by some to a lot of s-units when it comes specifically to raw signal strength. In some cases the difference
Tim makes a good point. The reason a 4SQ is a great DX antenna is that with a quality ground, the power at the lower angles is still significant where a short tower mounted beam drops off fast. The
Jim I don't think that Tim is saying the 4sq is 6 dB better than his beams. I read that as a 4sq is around 6dB of gain on a model. Maybe I'm reading that wrong. Pretty sure if it was 6 dB better t
I've had type 31 ferrites on a bunch of antennas over the years and never had a crack that was not caused by physical damage (meaning I dropped them or hit them somehow). So if you have cracked ferr
I have a rig expert AA55 and it's great. Long battery life, has end-of-coax-plane calibration and is rugged. The MFJ259 is fine but it's way too sensitive to BC interference. And the VNAs I have a
I'm rebuilding my 40m 4-sq verts and have some 15' lengths of 3" OD/ 2.75 ID tubing to use on the base end. And for the "stinger" end, I have some tapered elements off an old yagi that are 1.25" OD
I should have been clear. This is a question on the MECHANICAL side - some sort of physical transition between sizes. Not a modeling issue. SOrry for the confusion! 73/jeff/ac0c alpha-charlie-zero
Look into MMANA-GAL. It's very popular in the EU where EZNEC is the common one in the US. MMANA has a very easy to use interface and a built-in optimizer. If you don't want to get into the weeds l
Having no idea of the location, don't be surprised at all if having the commercial users on the tower turns your permit process into a major project. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.
I'm with Grant on that. The real value of modeling is not that it will ensure you build a good antenna, but rather it will help you avoid building ones that have no chance of working the way you wan
I have a number of feedlines that I want to apply GDT out in the field too. This is to buy a bit of extra insurance on lightning events. But I am wondering how to match up the GDT selection criteria
Steve, PERFECT!!! Thanks. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com 73, de Steve Ve6Wz Sent from my iPad On Oct 8, 2019, at 9:18 PM, Jeff Blaine <KeepWalking188@ac0c.com <mailto:KeepWalki
To check on my stuff, I use a Stanley LED spot light hand held. I think it's a 10W bulb and is stunningly bright. Towers are 250-400' behind the house. Definitely need my glasses but it's easy to s
A single turn through a given core has much less Z than the multi-turn variety. And as frequency goes down for a given ferrite (of any type), the Z is also lower. So it's not that they only work at
I've heard from some guys that used hardline is a mistake in the making. Well, that may be true in some cases but for most, it's definitely worth checking out. Especially if it's 50 ohm stuff. Even
Jim, I was exceptionally fortunate to have managed to buy a but, find some and be given a lot of hardline. Enough to do the entire installation save for a low 80m dipole. You may find the backstory
On the question of "Will the EHS cause interactions" - the answer is YES. That is true regardless of length, although the magnitude of the interaction is going to be a factor of many things including
Are you talking about the 40m performance? A local here K3PA has a mid-tri and has much better F/B on the higher bands but the 40m is as you say, in the 10-15 range - but that's to be expected from
Wanted to see if there were some recommendations on a solid surge suppressor I could hang on each end of a 300' run of ethernet that goes between the shack and the outbuilding? There are a number of