And my SN 502 is perfectly acceptable, even with the stock fan-ware (is
that a word?)
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
On 6/11/2019 9:22 AM, Dan Atchison via Elecraft wrote:
My KPA1500 s/n 156 had such a problem with PS audible noise.?? It was
fixed with two mods available from Elecraft, one a new LED board and
another with a resistor addition to the MeanWell power supply output??
The latter was probably not associated with noise but it's an addition
that was not on my #156.
73,
Dan -- N3ND
On 6/11/2019 7:51 AM, Roy Koeppe wrote:
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
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