The kind of noise the amp makes is related to but a separate issue to
the loudness. Last night I was doing some comparison listening while
trying to find some DX on 20m and noticed that while the FAN2 setting
was definitely louder than FAN1, it seems a more "pleasant" noise
compared to FAN1
This is an excellent post, and I agree with all of it.
I will add that acoustic considerations also STRONGLY affect the noise
produced in any ventilation system, and it is science more than an art.
The engineers who specialize in this field are called acoustic
consultants, their formal
My KPA1500 is S/N 00059. I don't operate full power all the time. I live in a
compromised antenna
area, and so I will use the amp as required to make contacts that are
difficult assuming I can hear the station well enough to have the QSO.
I have not had problems with the weird display issue that
Very good info Tony. Saves me the experiment. I think it also shows that
the guys at Elecraft did a good job in cooling design.
Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV
*Be joyful in hope,
For the heck of it brought my KPA1500 from the basement to the shack desk. Ran
a test with 10 CQ’s on 6M with 1K out on FT8. By the time the CQ’s were done
the amp temp was up to about 75C. The amp is set so the fan is always on at #1.
Added two 4” 110VAC fans in series to cut down the speed and
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