Note that the default RemoteRig setting in the control RRC gives a loud
CW sidetone. This can be easily lowered by going into the keyer settings
and change "side tone -db" to another number.
73,
Mitch DJ0QN / K7DX
Mitch Wolfson DJØQN / K7DX
10285 Boca Cir, Naples, FL 34109
Skype: mitchwo
USA: Home:+1-239-221-9600 - Mobile:+1-424-288-9171
Germany: Home:+49 89 32152700 - Mobile:+49 172 8374436
On 17.01.2016 11:10, Paul Christensen wrote:
Since last May, I've been using a K3 Mini with RemoteRig. Apart from one
anomaly, operating the K3 Mini has been a great experience. However, when
using RemoteRig, K3 mini speaker audio is extremely loud and the CW
side-tone is even louder. However, receive audio and side-tone level in
headphones is excellent. If one tries to reduce CODEC gain in the
RemoteRig, then headphone audio suffers and low-level digital artifacts
start becoming detectable.
The fix inside the K3 Mini involves replacement of two (2) "603" size SMT
resistors at R39 and R40. The stock values are 15K. I changed these to
100K. This results in a computed gain close to zero (Av = 1) for the
speaker amp and allows it to be used as a current driver for the speakers.
After the modification, speaker audio approximates headphone level without
excessively loud receive audio and side-tone. This change may affect
operation of the K3 Mini when a RemoteRig is not used in some applications.
However, probably most K3 Mini owners use theirs with a RemoteRig.
Suggestion to Elecraft: if there was a design reason for so much speaker
gain, consider placing 0.100" headers on a future PCB revision to allow
jumper selection of either the 15K resistors or 100K.
Many thanks for a great product.
Paul, W9AC
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