[Elecraft] My K2/100 is up and running, first go :)

[Matthew D. Pitts]

James,

My feeling is that since they were using that for the base K2, they felt 
that it would be good enough for the KPA100; and it seems to have been true, 
since I don't know of any failures that can be attributed to the thermal 
pads. Just my two cents(US)

Matthew Pitts
N8OHU
K2 #5956

----- Original Message ----- 
From: "James Cutler" <waldy at iinet.net.au>
To: <elecraft at mailman.qth.net>
Sent: Thursday, July 26, 2007 7:41 PM
Subject: [Elecraft] My K2/100 is up and running, first go :)


> Just a quick note to say that I have built the KPA100 and installed and 
> aligned it, and it is working fine on all bands. When I built my K2 at the 
> beginning of the year, it also worked fine, and still is. I have to say 
> that over all, I am happy with the radio, and it's performance.
>
> I have one query though, I am wondering why Elecraft have opted to use 
> thermal pads on the PA transistors in the KPA100 as opposed to heat paste? 
> (A lot of linear amplifiers that I have seen over the years use thermal 
> paste on the PA transistors without apparent problems.) I just suspect 
> that the thermal resistance of a thermal transfer pad may be higher than 
> that of thermal paste......please advise me if I am way off on this point.
>
> Cheers and 73 to all......
>
> James Cutler,
> VK2TIM
>
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