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Here's another graphic for you chaps to consider, both models have a minimum height of 0.5m, so when you see 0m height, it is actually 0.5m, this model has the horizontal dipole at approximately 1/2WL high ;) and I've varied the height of the vertical dipole from 0.5m up to 5.5m, this is so we...

Thanks for the explanation, I suspected as such having read your earlier comments about the capcitor:wink:

I'm good with the dipole, but thanks for posting :thumbup:

Maybe you need to explain, if what you are saying is that you made an assumption about a simple model I had presented, then that's ok, I do it all the time :wink:

It's the same antenna rotated through 90 degrees, a vertical dipole does not have the same gain as a horizontal dipole other than in free space, antennas do not exist in free space, they are influenced by the ground, and horizontal antennas more so than vertical :wink:

Why not, I regularly speak to a chap in Ausralia on 20m who has done just that:wink:

If you look at the details under the comparison, you'll notice both these antennas are at 10m agl, that's plus the original model height of 1m agl, a total of 11m high, a not too unrealistic height for many people :wink:

Genuinely interested to see your more accurate version.

No popcorn needed, here's a photo that might help, guess which is the horizontal dipole:

A horizontally polarised dipole will have significantly more gain than when vertical, now that's a freebie I like :wink:

What was the fix (to save me searching the web :tongue_smilie: )

I think the point is being somewhat lost, it has already been established that the capacitor and tuning stub benefit from a lower loss cable, that isn't being questioned, however the feed, and the rest of the antenna shouldn't suffer with most installations, IIRC the original Gainmaster was...

For most installations I wouldn't worry too much about the power handling capability of quality RG58 at 27MHz: Belden Technical Info

I had just moved house and wanted an antenna up and working as quick as I could, I made a speaker wire dipole, including feedline choke, for the 20m band and hung it up around 7' for testing, well it stayed like that for over a year until I put up something a little better, I worked into East...

Do you think the GM is 8dB better than any Imax, or jut your Imax? As much as the GM has changed the established method of feeding a 5/8WL antenna, it is still a 5/8WL antenna, and changing one 5/8WL antenna for another 5/8WL antenna does not 8dB make, the matching stub doesn't add to the...

Ther are a number of flawed tests carried out with regard to the GM, the number one flaw being that the test isn't blind, the well intended helpers should be unaware as to which antenna is being tested, additionaly their results shouldn't be broadcasted for all the other testers to hear, the...

I believe the GM shows improved gain at 0degrees in free space, 0degrees over ground won't happen, any radition at 0degrees is cancelled by ground reflection in the fresnel zone! That said you're in business at any angle greater than this. As for the horizontal beam over water, it is bound by...

There's very little I'd call DX that doesn't require a low take off angle, it's also a good reason why one needs to be realistic about what one hopes to achieve with their antenna, a low take off angle benefits long distance contacts, and a higher angle will benefit shorter distances, that's not...

I already had a 20m 1/4WL ground plane model, but with only three 1/4WL sloping radials and it gives the following figures at 5m agl: F(MHz) 14.15, R48.42 j2.366 with 1.06:1 VSWR With three 1/8WL sloping radials, again at 5m agl: F(MHz) 14.15, R30.14 j-171.3 with 21.7:1 VSWR What was...

If I was on an island DXpedition, and by the sea, I wouldn't consider anything other than a vertical. If I was building a high performance competition station then from 40m and up I wouldn't consider anything other than yagi's, however for 80 and 160m I wouldn't contemplate anything other than...