Ed Muns wrote:
>> During the NAQP RTTY, at one point I was calling a solid
>> stream of CQ's at 100 watts output on RTTY and not getting
>> any replies. I was watching the PA Temp, and it climbed up to
>> 65C and looked like it wanted to keep rising pretty quickly.
>> I think hi temp shutdown is at 84C. I backed off on my CQ's
>> and used the other radio for a while. I had the fan speed
>> locked on step 4. All of this was at 13.8VDC. With any kind
>> of heavy duty usage, I don't think cranking up the voltage is
>> a good idea. A better idea is to buy an AL-1500 or similar
>> low drive amp, which will give you 1500 watts out with 50
>> watts of drive. NOW, we are talking "juice." ;)
>
> This is interesting. I run 100 watts output on RTTY, CQing and working
> stations at a continual flow, and the fans hardly run at all. The PA
> temperature stays down. I wonder if there is something unique going on with
> your K3(s)? One user found a fan wire impeding the blades of one of his
> fans and even on CW, he had the same experience described above.
Ditto - I ran two K3s at 100W for the NAQP RTTY contest a couple of
weeks ago, and was (pleasantly) surprised by how cool they remained.
~Iain / N6ML
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