[Elecraft] KPA1500 Power Supply Fan Noise

[Roy Koeppe]

Eric -- this is not at all normal! My PSU is quiet...hardly hear it from 
under the table. I understand Elecraft changed to much quieter fans maybe 
two years ago. But even so, perhaps the voltage to your fans has soared way 
to high? I haven't looked at the circuit driving them. Maybe lost 
regulation, etc.

73,   Roy    K6XK


Apparently I was not clear enough in my message.  It is the PSU fan noise
that is deafening, not the RF deck.  Like Peter, my PSU sits on the floor
underneath a wooden operating desk that holds the rest of the K-line.  The
noise from the PSU is high-pitched and piercing.  The only thing I can
liken it to is a four-rotor Mazda prototype IMSA GTP race car from the
early 90s.  Brain-piercing, tear-your-hair-out, heard-from-every
room-in-the-house louder than hell, and has been so since the day it
darkened my doorway--with the RF deck at idle.

73 Eric WD6DBM