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Antenna coax inside shack. I have 3 barrel so connectors mounted through a 2” piece of angle aluminum. I plug into those to choose all directional, vertical or horizontal. Budget alternative to a high power antenna switch. Use a jumper between meter and antenna chosen. Jumper between main amp...

Shack

With this antenna I can’t get a reasonable SWR reading. And different length of coax jumpers change the results. Everyone insist it’s the setup of the antenna itself. It has all original elements and matching stubs. If coax length isn’t the root cause then it has to be antenna issues. Moving the...

Yes at least 100 times. :) :) There are multiple pictures in my media of various ways I tried connecting my coax to the stub rods. Nothing helped so I went to back to its original termination. If you want to look at them. will 5 mix 31 beads at the feed point work? if not I think I have some...

Which works better at preventing common mode currents on outside of coax? Ferrite beads or wound toroid?

Image 8411 doesn’t match the factory drawing. But has been corrected it’s an old picture. But results remained the same either way.

Here is what info I have on the antenna. If the 1/4 directly connect to the matching stubs is supposed to be isolated from the remaining 3 sides of the cube it makes no mention of it. If it is supposed to be isolated that would explain a lot.

Yes sir. I have read that story. They still supply parts for this antenna. The driven element where the stubs are connected uses stainless steel bolts that pass through the fiber glass spreaders. This makes the whole cube electrically common. This is the design I’m a bit puzzled about. I have...

I have home brewed several yagi and dipole antennas with out issues. But this one is being a beast. I think it may have to do with the matching stubs and the way it feeds a cubical quad with both vertical and horizontal polarization.

Thanks crawdad. That’s what I was thinking as well. That antenna is an odd bird at the least.

So that’s exactly what I feel is going on. Would a choke help?

Lightning L6 quad. It’s on my profile picture. It uses dual stub feed.

That’s exactly what I have heard. So my set up is lightning L6 quad, mfj meter Fed from x-force straight 10 pill, driven by tube amp and galaxy base radio. Changing lengths between any one of the four changes my meter results. Tower grounded well. What should I be looking for? As long as I keep...

Some analyzers require 1/2 wavelength coax jumpers to display accurate results. So I’d like opinions around using solely 1/2 wavelength jumpers between meters,amps,drivers and radio. 1/2 wavelength multiples to antenna feed. Wouldn’t that insure your equipment will display more accurate readings...

I recently replaced toshibas with HG pills in my x-Force straight 10 pill. I removed the original unregulated power supply as the HG are sensitive to voltage swings. Planning on stacking 3 of these to replace the unregulated supply. They are dozens of different versions out there. This is the...

Anyone know if this is correct Mods for this particular power supply? Any input is appreciated.

Replaced all the Pills with matched HG’s. Verified all the transistor diode side resistors was good and in tolerance. Replaced all the combiner resistors with original 2 watt 100 ohm resistors. As well as the transistor feed back resistors. No heat except the normal transistor heat. Thanks again...

I wanted to come to the thread and Thank everyone who helped. Running really well with minimal heat. Again thank you all. 73’s.

The new set of matched HGs from ICA seems to have fixed the issue. I have only put 10 watts in and get 150 out. I still nervous about driving it with the 150 in. The built in unregulated power supply supplies about 21 vdc tapped on the 115v source. I really would like your opinion on using the...

What’s your thoughts on the variable ac voltage transformer to tame down the unregulated power supply? I have a matched set of HG 2sc2879 16D08 on the way. What effects will an unregulated power supply have on the HGs? Thanks again.