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" <[EMAIL PROTECTED]>
To: <[email protected]>
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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