Wayne,
Thanks for that suggestion - it worked!! One starts to wonder if there is
any thing that this radio can't do!
73 -- Brian -- K1LI
On Mon, Sep 28, 2009 at 5:58 PM, Wayne Burdick n...@elecraft.com wrote:
The K3 has a CONFIG menu entry called AFSK TX. If you set it to FIL
ON, a 400-Hz
After enjoying my K3 for about nine months, I was recently alerted to
audible 60-Hz hum on my transmitted audio signal. After reading the many
hum related posts on the reflector, I began investigating. Step 1 was to
remove all connections to the rig except the DC power and the coax to the
external
On Mon, 28 Sep 2009 13:29:54 -0400, Brian Machesney wrote:
The problem only occurs in an
SSB mode when the nearby PA is both on and enabled (i.e., not on standby)
and when the K3 is both within about 8-in of the PA and parallel or at right
angles to it; rotating the rig about 15 degrees around
Would wrapping some of this Ultraperm 80 shielding around the K3's
audio transformers be a solution?
(http://www.goldmine-elec-products.com/prodinfo.asp?number=G16600A)
73
--
Joe KB8AP
On Sep 28, 2009, at 12:06 PM, Jim Brown wrote:
On Mon, 28 Sep 2009 13:29:54 -0400, Brian Machesney wrote:
Jim K9YC wrote:
Magnetic field coupling from the power supply to the K3's input circuitry,
probably due to the use of unshielded audio transformers in the K3. This
is a well known problem. One good band-aid is to go to the TXEQ1
settings and fully cut the three lowest octave bands.
...
One
The K3 has a CONFIG menu entry called AFSK TX. If you set it to FIL
ON, a 400-Hz transmit-mode audio filter is inserted, centered around
the mark/space tones. This is only available when the rig is set for
AFSK A mode. It should be effective against low-frequency hum coming
in through the
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