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MFJ-643

BOOM MIC SO2R SWITCH

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MFJ-643
$ 139.95 Each


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Have
you got
two radios, but only one keyer, one headphone
set, one paddle and other accessories?
MFJ will unclutter your operating
position and save you money -- you only
need one microphone, keyer, soundcard
interface, iambic paddle, etc.
MFJ-643 lets you operate two radios
with the following accessories: Desktop
and headset Microphones, keyers/keys/paddles,
soundcard interfaces, modems, etc.
The MFJ-643 is designed for easy use.
Just set the internal jumpers for the MFJ-
393 Professional Boom-Mic Headphones,
Heil series headphones, a computer boom-
Mic or computer boom-mic Headset.
You get instant LED visual indication of
the transmit audio path so you know which
radio your audio is being sent to.
On receive, you can instantly choose
between Mix, Radio 1, Stereo or Radio 2
depending on how you want the audio presented
to your headphones.
The input source connector is a 3.5mm
stereo jack. Your input source can be a
dynamic or electret mic (low or high impedance),
stereo or monaural receiver audio,
sound card or modem, or key or keyer.
You have a choice of PTT functions:
Use your microphones PTT switch, a foot
or hand switch or the convenient PTT
switch located on the front of the MFJ-643.
There are also additional inputs, dual
outputs for your keyer, and two lines to
switch an antenna between your radios, key
an amplifier, or anything else you want to
use them for.
Use 12 VDC or 110 VAC with optional
MFJ-1312D, $15.95 power supply.
Compact 71/4Wx23/4Hx51/2D inches.

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