Kenwood mic does not use bias (it is dynamic). Elecraft requires
bias. Measure between pins 1 and 7 to confirm bias (2.2 to 3.3V -
industry standard for AV mics).
Also check to make sure the microphone is wired correctly - mic
ground must be on pin 7, PTT ground must be on pin 8. If the two
are reversed the mic will not receive bias. Elecraft connects
both 7 and 8 to the same ground but the mic and PTT grounds are
different in microKEYER/microKEYER II (and most other manufacturers).
73,
... Joe, W4TV
On 2/24/2013 1:05 AM, Ricardo PY2PT wrote:
Dear Joe,
I've tried both jumpers position and nothing!!!
With my kenwood hand mic everything is ok. But with the MH-2 mic (even changing
the jumper position) nothing!!
Best Regards
Em 23/02/2013, às 23:31, Joe Subich, W4TV escreveu:
The MH2 is an electret mic wired with a Foster plug having Elecraft's
Kenwood compatible pin assignments. The microHAM DB37-EL-K3R and
DB37-EL-K23 cable sets are configured for the Electaft/Kenwood standard
and the supplied Foster to RJ-45 adapter cable allows connecting the
MH2 to the rear panel MIC jack (RJ45).
Since the MH-2 is an electret mic and requires bias voltage on pin 1,
it is necessary to install the "electret" jumper for the RJ-45 jack
located just in front of the three trimmers in the center of the MK II
circuit board as shown in step 5 of "Preparing microKEYER II for Use" -
page 8 of the microKEYER II User Manual.
73,
... Joe Subich, W4TV
microHAM America, LLC.
http://www.microHAM-USA.com
http://groups.yahoo.com/group/microHAM
On 2/23/2013 7:25 PM, Ricardo PY2PT wrote:
Dear guys,
Please, any friend use the hand mic (MH-2) with a MicrokeyerII interface?
Best Regards
Ric
PY2PT
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