I can tell you that I had similar problems when I tried to do this with
the K2 back before the K2's 100-watt KPA100 was available. I tried using
an external 100-watt solid-state amplifier (good quality, made by Henry
Radio) to drive a one-kW linear. Sometimes it worked, but sometimes
there was feedback which caused horrible clicks/spurs, etc.
There is a lot of gain external to the KX3 here. I think you have the
answer in "RF hygiene," which should include separate leads to the power
supply for the KX3, KXPA100 and ALS-600S (or separate power supplies).
Good coax and liberal use of ferrites might help too.
On 25 Oct 2014 23:48, David Ahrendts wrote:
I want to run my just-born KX3 and it’s 100-watt companion KCPA100
into a high power linear, my Ameritron ALS-600S. But we have some
issues. For instance: the combo easily produces 600 watts CW. But, on
SSB it far too easily trips the Ameritron load fault, or the KXPA100
high SWR shut down. This rather acts like RF feedback. Maybe I just
need to follow better RF hygiene here (higher quality coax cables,
making sure RF does not loop back on a power cable, etc.). Any
collective wisdom appreciated.
David Ahrendts, KC0XT, Los Angeles
David Ahrendts davidahren...@me.com
--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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