Dave VanHorn wrote:
> FWIW, this is the same VHF kenwood that will melt it's own solder
> joints at 22W output using a transistor rated for 110W continuous..
> My Daniels amp is the same physical size as the power amp on the
> kenwood, outputs 40W, and never gets above 100F. I don't think the
> final had much/anything to do with this problem, but I do think it's
> very badly designed.
There is other problems with this. I expect a major problem with the
output circuits or the duplexer, if there is one. Those normally run at
30-45W out in continuous duty with no problems.
And I doubt that transistors rating are correct. I know Tait was trying
to do 100W continuous duty with one transistor, and failed miserably.
Even in intermittent use the collector lead would unsolder itself on a
regular basis.
I expect a proper rating for it would be more like 50W continuous.
--
Jim Barbour
WD8CHL
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