Then you haven't used a KPA1500.
Rick NK7I
On 7/8/2020 2:11 PM, Eric Norris wrote:
Thanks, Jack! Now the only question is, is the KPA500 a great amp, or the
greatest amp ever? I'm in the second camp.
73.5 Eric WD6DBM
On Wed, Jul 8, 2020, 1:16 PM Jack Brindle <[email protected]> wrote:
I can confirm that KPA500 V1.00 firmware, which was the first released,
had a max temperature of 90 degrees C. This has not been changed in any
subsequent code.
As for the input power, the amplifier has improved over time. My original
prototype KPA500 requires power in the range described (about 35 - 40
watts), while my new one (just over a year old) needs about 20 or so watts.
Both are great amps!
73!
Jack, W6FB
On Jul 8, 2020, at 1:00 PM, William Hammond via Elecraft <
[email protected]> wrote:
Hi Eric, My manual (revision B, 2011) that came with my SN 0149 says 90C
maximum, page14 in the specifications. It also says drive power 30-40
watts for 500 out and I have never beed even close to that, usually 22-26
watts drive.
FYI,
Bill-AK5X
On Jul 8, 2020, at 6:00 AM, Eric Norris <[email protected]>
wrote:
I just read in the current KPA500 Manual that max heat sink temp is 90C.
Is this true for my first-year production KPA500? I seem to remember
somethink like 75C. I cant find my old manual.
73 Eric WD6DBM
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