[Elecraft] KX2 heatsink

[Irma & Linas(LY2H)]

Hello folks,
I am looking for the practical , empyrical, real info based on the
individual measurements of the maximum Key-down time/temperature at the 10w
output of the KX2 before it drops down to 5 W issuing a message of "HI
TEMP". I would also like to learn about comparison of the KX2 stock
heatsink vs the Pro-audio Engineering KX22 product.

The reason is that I have decided to install the KX22 on my KX2 ( # 148*)
after a short dx-pedition to Aland islands in May. I was handling quite a
pile-up from the hotel room and after some 5 min of intensive CQ-ing and
answering on CW the PA temperature gone up to 59-60C degrees and the power
dropped down to 5 W and it was frustrating :)
Today I have installed the PAE KX22 heatsink. The key-down at 10 W into a
dummy load in CW mode lasted for around 3 minutes starting from the ambient
temp. 27C. I don't think this is very impressive baring in mind the
Pro-audio's  claim of the 250% key-down time improvement. Unfortunately, I
was not so smart to test the key-down time with the stock heatsink before I
changed it to the new one, :) But I remember Wayne was posting  here in the
previous thread something abt 7 min of key-down at 10W... So, with the 250%
improvement with the KX22 it should  last... for some 24 min?! in my case,
It doesn't sound very realistic , neither 7 min with the stock heatsink,
nor 24 min with the Pro-Audio ( maybe ,bad thermal contact, not enough of
grease?). That's why it would be very interesting  to compare the real-life
empyrical data of the other KX2 owners.

73! Linas LY2H