After reading Burt N4CW comment ... I have a 3" muffin fan laying on top of my
KXPA100. I use a series resistor in the 12v source and the fan runs at reduced
speed all the time. Receiver noise masks the fan noise and I can run RTTY ,
PSK etc non stop with a "cool to touch" heat sink. I have been very active
chasing the ARRL Centennial stations, so considerable RTTY and a bit of PSK31.
Been a ham 59years and the this was first 10m SSB contest I ever participated
in. Also first time I ever used the N1MM logger+. I had a good time using
non-resonate 80m and 40m dipoles and the KXPA100 driven by my K3/10.
73 Bill K0AWU
From: Bert via Elecraft <[email protected]>
To: [email protected]
Sent: Monday, December 15, 2014 1:35 PM
Subject: Re: [Elecraft] ARRL 10-m contest
I used my KX3 and KXPA100 for the 14 hours I was on. I recently had gone
through the rx sideband nulling procedure and really enjoyed single-signal
reception. The amp got pretty hot...it definitely needs external cooling of
some sort. I didn't take any PA temp readings, but the heatsink was
uncomfortable to touch during long spells of "running" at 100W output.
The KX3 is an outstanding performer, even if QSK isn't as quiet as the K3
with FW 5.01 :~)
73, Bert, N4CW
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