It always pays to keep your eyes open. The local (and only ) surplus
store here has a pile of heat sinks that look just great for a 250 watt
solid state PA. The good part is that they also have a pair of SMA
connectors, PC boards, and associated flanged 50 ohm resistor good for
several hundred watts. I think I paid $15 for one, so I got two DC to
2.4 GHz dummy loads for $7.50 each. It is easy to modify them for what
ever connector you want. Jim is right, but always bring a pocket ohm
meter! heh heh.
Dave K1WHS
On 12/28/2016 8:52 AM, Jim Brown wrote:
On Wed,12/28/2016 12:26 AM, Edward R Cole wrote:
I have a big old Sierra Electronic 500w coaxial load with heat sink
and built in power meter; weighs about 40-50 lbs; makes a dandy door
stop, too! It is rated to 1000-MHz.
I found a nice oil-cooled dummy load with a big heat sink integral to
it at a hamfest many years ago. It's rated 500W continuous. That was a
good day. Doorstop -- you betcha! :) Measured it with my VNWA and
found that it's good well into UHF. No attached power meter though,
but found a nice Bird with some slugs on another day.
I've also found industrial quality 10W and 100W dummy loads at
hamfests that were salvaged from cell sites. One purchase yielded
nearly ten of them.
This is the sort of stuff I look for at hamfests (some call them flea
markets or swap meets). Also high quality connectors and adapters.
73, Jim K9YC
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