My KPA1500 seems to max out at about 65 C when running and calling CQ.
At that temperature, the fans are just barely audible with the
Radiosport headset. That would be way too loud for me with any other
headset I've used, let along a speaker. While it has other big
advantages, the noise level is about as bad as that of my old AL-82. Of
course, the KPA1500 could be located in another room.
73,
Scott K9MA
On 5/28/2018 13:24, Ralph Parker wrote:
I'm on the list for a '1500, expected sometime in August (maybe).
However, I'm getting concerned about the reported high fan noise level.
I currently have a '500, and following a suggestion a year or two ago,
I've turned the fans around 'backwards' and they seem to be quieter in
this configuration. I would give the '500 a "quiet" in the noise
department. Temperature does not seem to be an issue.
In addition, I have an Acom 1000, which is also a quiet amp - fan as
well as relays. Hard to hear it in operation (but the 3 minute warmup
usually seems like three hours. :-)
I ordered the '1500 In the quest to be a couple of instant db louder,
but if I don't hear some resolution of the noise 'problem', I'm going
to put the order on hold until it is solved. I do have many headsets
which I usually wear, including the Bose QC15 noise cancelling model,
but I'd hate to be FORCED into using them.
A concerned citizen.
VE7XF
(over 30 years of sound recording wearing a headset)
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Scott K9MA
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