The Elecraft XG50 is a simple 49.380 MHz signal source specifically
designed for use with the KX3 Extended VFO Temperature Compensation
Procedure. This procedure is optional, intended for those who wish to
use the KX3 in narrow-band modes such as JT65, WSPR, etc., on the
higher bands. (The KX3's normal temperature compensation is entirely
adequate for all other modes.) The XG50 could also be used for general
signal tracing of 6-meter receivers that include the 49.38 MHz range.
The XG50 can be powered from 8-15 VDC. It has an RF output of about 10
mVpp (-36 dBm). Note that the output frequency will not be exactly
49.380 MHz. After the XG50 is used for temperature compensation, the
KX3's REF CAL menu parameter should be fine-tuned using a signal at a
known frequency, such as WWV or other broadcast station.
Available only as a full kit (soldering required), the XG50 is priced
at $39.95. Assembly should take well under one hour.
For additional details on the XG50, see the instruction manual:
http://www.elecraft.com/manual/XG50%20Manual_B.pdf
The KX3 extended temperature compensation procedure can be found at:
http://www.elecraft.com/manual/KX3%20Custom%20VFO%20TC%20rev%20A8.pdf
73,
Wayne
N6KR
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