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See any of the right value?

I didn't measure the input match before adding parts. It's easy to plug in another module to check. There are another 10-15 that have not been modified. The 10dB pad should improve the match considerably. Return loss is about 16dB now, so the pad would improve it to 36dB which is about...

I'd like to get the UHF amps here working too, but they won't fit in the same module assembly with the Larcans. Checked the 6-meter amp. 6.5W drive to produce 1kW output power. Reflected power about 150mW. Not great, but acceptable for ham radio use.

The input and output couplers are rated at 400W CW. With 25W max drive power and 10dB gain, I wouldn't expect the high band driver to be good for anything more than 250W. Even then, the tuning is so far off that you may pop one of the FETs while trying. Any interest in getting on 222MHz? I...

Garth: The high band gain curves are on my Larcan page. It drops very fast below 174MHz to about 10dB at 144MHz. I don't like to put more than 25W drive into the converted 2M Larcan with 16dB gain, so would not expect your high band amp to work well there. I've heard of no one using the high...

Photos The swing arm magnifier won't do much for reading values from the capacitors. I take pictures using my cell phone and then magnify them to ensure values are correct. Go ahead and critique my soldering skills. There seem to have been changes from the schematic diagram to what Larcan...

I have no idea what legal limits are in terms of DC input or RF output power. Should look into it a bit more before turning things on. Having an amplifier capable of 3kW output is really no different than driving a car capable of 100mph on a 30mph road. Just because it is capable of much more...

Output combiners Output combiners for 50MHz and 222MHz. 8.5x11 paper will give size reference. Input dividers are considerably smaller. The quick hand drawn diagram shows how the switches will handle 1.5kW each and then combine afterwards for 3kW. Divider and combiner remain inline during...

This writeup by Dave Olean will improve the Lo/Lo performance at 50MHz. I used leftover parts scavenged from the 2M conversions to add to mine. Stop by with a magnifying glass and you can have a few capacitors Garth...

I'm planning a tri band Larcan amplifier. Two parallel modules on each of 50MHz, 144MHz, and 222MHz. All six mount vertically in a modified Larcan frame. Output power 2kW per band, possibly in excess of 3kW when I find suitable 1.5kW modules. I picked up a HP power supply frame to hold six...

Any progress with getting on the air? I've been doing 2-meter conversions lately, well over 20 completed and producing 1kW output. Another 30 or so to go. Not sure how I get myself into this some days. Pics and changes to the amplifier are posted on my web page. Larcan 1kW conversion photos

You clearly have little idea what you're talking about. CP and the Rototiller design are very common for FM broadcasting. There is a reason to use it in favor of strictly vertical or horizontal polarization. Signal penetration and overall range is usually much better with a CP antenna...

More Larcan amplifiers available I'm expecting another stash of Larcan Lo/Lo amplifiers within about two weeks. These can be used on 6-meters or 4-meters as is. With conversion, a full 1kW can be delivered on 2-meters. There are still a few 1.5kW for 222MHz kicking about too. Email...

Crossed dipoles Mounting two dipoles to create a X-shape. By adjusting the phase difference between the two it could create anything from vertical to horizontal. In between the two will be eliptical with varying portions in either plane. With equal H and V it will create circular...

Harris Platinum SSPA 6M and 4M dual band amplifier. Approximately 10w drive is needed. On 6 meters it will produce about 1400W output. Add RF connectors, a PSU (about $40 on ebay), cooling, and T/R relays. EME QRO on 50 MHz. See here for better info and pics. Harris Platinum I Channel...

Here's what I'm trying to reduce the fan noise. Snip the red wire from one fan and the black from the other. Place a 39 ohm 1W resistor between the lines going to the fans and heat shrink the other ends. Do not connect these wires together! They are just covered with the same piece of heat...

During high school some of the guys would turn on the gas valves for the bunsen burners. Where the hose would connect they would hold a lighter. It made a flame thrower across the class room. No idea why they didn't burn the place down. Not sure why the gas was always left on either...

How have you connected the power supply DC output to the real world? I've tried 1/4 inch spade terminals but they don't seem to hold very well.

The ground work side of it is easy but climbing the trees is another story. I can't even try to climb without someone else nearby to act as a spotter though.

I hope to get two antennas in the air shortly. Both will be built with 12 gauge solid copperweld wire. It has a much higher break strength than 14 gauge stranded. The antennas will both be fed with balanced line. It will use 2-inch ceramic insulators and 14 gauge stranded copperweld...