842
2 Radio
Headphone Mix & Switch
Thank you for choosing the Dunestar Model 842 . With just a few steps your
2 Radio Headphone Mix & Switch system can be placed in operation.
General Information
The 842 takes headphone outputs from 2 radios and combines them into one
stereo headphone set. This handy device allows you to mix or switch from one
to the other. Listen to 2 bands at once and yet instantly switch full attention to
one or the other, or fade one band to the other. Easy installation and operation.
Applications:
*SO2R (Single Op 2 Radio) contest operation
*Listen to HF band and 2M repeater simulataneously.
*Split VHF weak signal operation 6M & 2M or 2M & 432MHz , etc.
Description:
The 842 consists of a 4- position rotary switch and potentiometer , input and
output jacks mounted in an aluminum enclosure. The circuit is reliable and
allows maximum flexibility with a minimum of components.
Selections:
*Mix - Continuously variable from LEFT radio to RIGHT radio
*Left - Left plus right phone to LEFT radio
*Stereo - Left phone to LEFT radio
Right phone to RIGHT radio
*Right - Left plus right phone to RIGHT radio
Dimensions: HWD 2.0 X 4.75 X 4.0 Inches, Ship Weight 1-pound
Installation
Installation is straight forward.
Inputs to the switch should be taken from the headphone jack on your
transceiver. These are usually standard 1/4-inch stereo (3-circuit) jacks.
The input jacks on the rear of the 842 are 3.5mm (1/8-inch) mono and are
marked “L” for LEFT radio and “R” for RIGHT radio. Two cords are
required with 3.5mm plugs on one end and a plug to match your transceiver
on the other. If you use stereo plugs, only the tip (and sleeve) connection is
required. Sheilded cable is prefered for the cords though not absolutely
required.
Operation:
Set levels by plugging your headphones into the unit. Move the SELECT
switch to the ‘Mix’ position. Set the MIX knob pointer to center position.
Adjust your transceiver volume controls for equal volume in each ear.
Tune in signals on each radio, then rotate the MIX control left to right The
level will now follow the control to one side or the other.
Moving the select switch to LEFT, STEREO or RIGHT will cause you to
hear only LEFT or RIGHT radio or equal levels STEREO from left and
right radio.
If you have difficulty or need additional information please feel free to con-
tact us. Most installation questions can be handled via email or phone call.
(Note: If you are interested in IMD control for multi-transmitter operations,
such as contesting and Field Day you may be interested in our multiband and
single band bandpass filters and other related devices.)
For Updated Information and New Products
Check our Home Page on The World Wide Web
http://www.dunestar.com
