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Have you considered keeping the quad reflector and director, but using crossed yagis for the driven element? The two yagis can be fed simultaneously to produce either a horizontal or vertical signal, or even circular polarization. Two coaxial switches will allow control of what mode the...

I may get more... We could save on shipping. Let me know first.

If you're in a rush and can replace it, stop by for one. I may buy several more, they would be very good to supply with the 1kW Larcan amplifiers. Greatly simplify switching and getting the amp on the air.

DowKey relays arrived for BFLA today. 26V each. Two in series will work well with the 51VDC power supply.

I haven't looked into EMP specifically, only the issues of very high currents passing through equipment between various sources. I've been told that a Faraday cage can protect things inside, but nothing else can be connected to it. Put a tower on each corner of your house and run a wire...

My take on bonding and station configuration. http://members.rennlist.org/warren/grounding.pdf There are links near the end for writeups by Polyphaser and Nautel.

I had a couple of them when you were visiting. I just have the one pictured for 222MHz remaining. It has two independant parallel amplifiers. Would make a sweet set of drivers for a pair of 1.5kW amplifiers. :) About 2 watts drive for 3kW output.

PM sent. Capt Kilowatt posted a long list of links quite some time ago. A search might find it.

There are so many misconceptions and people blowing hot air about this topic. I've seen very very few radio installations where grounding and bonding has been even remotely close to what it should be. Most FM and TV broadcasters have no clue WTF they are doing with this. I've been told we've...

It's the IPA or pre driver stage. Uses a pair of MRF148 transistors. 50VDC power supply required. Photo attached is for high band 174-230MHz. The 50MHz version is the same size, but does not use the circuit board with the 2W ICs at the left. It uses an Anaren 3dB coupler at the input and...

Would 50W be enough? There is a small Larcan amp that may do what you want.

Been flogging them for that before as well. :) Lo/lo covers 54-72MHz without changes.

Back when I was messing with modding CBs, a few came through that would warble on transmit. The voltage feeding the clarifier was not steady. Varying output power would cause the voltage to swing, and then the varactor diode would change value, causing frequency shift. If you have a modded...

A balun should provide a more predictable pattern for the antenna. Otherwise current on the cable outer jacket will distort the radiation pattern.

Check a Larcan low band TV amplifier driver. It uses a pair of MRF151G FETs, but can easily be separated. I plan to modify one for 144MHz and use the other for 50MHz. Roughly 250 watts output for as little as 2W drive. Larcan 1kW and 1.5kW amplifier modules

The Larcan amps would work sweet on 4-meters too...

If I lived at the site and had time to build a dedicated antenna I'd be in full agreement. I think the rope yagi was easy to build, easy to install, and it seems to be working. There have been multiple reception reports in Europe. They have updates and many photos on Facebook. Search for...

I've had better success with the shield on the long section and the center conductor going to the short stub. It may also work better if you minimize the horizontal part at bottom of the J, keeping the two vertical elements much closer together. Keep the shield length very short, to the point...

Brendan Quest is using a 1kW Larcan amplifier modified for 144MHz. Brendan Quest 43 element rope yagi pointed towards Ireland in hopes of making a 2-way contact across the Atlantic.

I'm leaning that way also. Half power is in each angle which is then combined to restore the single linear polarity. More thought and reasoning needed. If the two yagis were separated by some distance and operated in the same plane their gain would increase by 3dB. Operating both...