Manfred,
I've played with some "highly efficient" amps. Don't like the
complexity. For me at least, simpler is better. I can throw together a
simple inefficient AB linear in a heartbeat. Electricity is no problem
as I am right next to Grand Coulee Dam, cheapest power in the world.
I've used up all the heat sink stock I've collected over the years, and
since I no longer live where there are hamfests and salvage yards, I
don't have an easy way to replace them.
Lucky for me a few of this lists members have come to my rescue and I
may have enough available shortly to keep me going for a few more years.
And yes, I have found no supplier better than HeatsinkUSA.
Thanks & 73,
Larry - W7IUV
On 11/16/2018 12:39 PM, Manfred Mornhinweg wrote:
Larry,
my reply won't be the most helpful, but anyway:
Make a highly efficient amplifier. Then you don't need a huge heatsink.
Other than this, Heatsink USA is where I have bought heatsinks several
times. Even from my location in Chile, with much more expensive
international shipping, it was my best option.
Since then I have been collecting enough heatsinks from scrapped
equipment to last for a while. Some huge ones come from a Siemens
excitation control system for a big hydroelectric generator, and a big
and very dense one, suitable for dissipating several kilowatts of heat
with the help of a powerful blower, came from a Peltier chiller.
Maybe you can find some good big ones in industrial scrap yards. VVF
drives for motors are massively used, rarely repaired when they fail,
and the bigger ones often have rather large heatsinks in them.
Manfred
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http://ludens.cl
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