Would anyone know:
What would be the upper limits of PA temperature in ºC?
Also is there a way to go back to the original freq after calling up
a freq in a memory slot?
TNX
73
de
todd
WB2ZAB
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How hot does your K3/100 PA run?
And how hot is safe?
I was sitting in a pileup at 90 watts and watching the PA Temp - it got up to
around 41 or 42 C (about 100 F) so I turned the fan up a notch or two and it
cooled right back down to around 20 C (70 F).
73HankK8DD
--
'Never argue
Hank,
I don't know how hot is safe for the K3 PA devices, but I would believe
your 42 deg C is OK.
I am going to go out on a limb and make some assumptions - that the PA
transistors are operating at 65% efficiency, that they are rated for the
normal commercial operating temperature of 125
hank k8dd-3 wrote:
I was sitting in a pileup at 90 watts and watching the PA Temp - it got up
to around 41 or 42 C (about 100 F) so I turned the fan up a notch or two
and it cooled right back down to around 20 C (70 F).
How did you turn up the fan? I assumed that the K3 would speed up the
We will let the heatsink get up to 85C before dropping the KPA3
off-line, that still has plenty of safety margin for the transistors.
40-42C is actually on the cool side for heavy usage. But it never hurts
to keep it cool if you don't mind the added fan noise. Fortunately the
K3's dual fans
PROTECTED]
To: Elecraft Reflector Elecraft@mailman.qth.net
Sent: Wednesday, June 04, 2008 9:36 AM
Subject: [Elecraft] PA Temp
| How hot does your K3/100 PA run?
| And how hot is safe?
|
| I was sitting in a pileup at 90 watts and watching the PA Temp - it got
up to around 41 or 42 C (about 100 F) so I
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