Subject: EXPANDED RX / TX MOD FOR ALINCO DJ-S41
Performing this modification will void any warranties.
All standard disclaimers apply. This mod is for the
DJ-S41T, and not the DJ-S41(C) 10 mW version.
1. Place the radio face down on a soft towel. This avoids
scratching the display and gives you a place to put
the seven tiny screws to be removed.
2. Remove the batteries.
3. Remove the three screws on the upper rear cover, and
the four screws inside the battery compartment. The
rear cover can be lifted and removed easily, as there
are no wires to be concerned about. The antenna
connection is made by means of a gold-plated spring
4. Look for a small (about 1 mm) green surface mount
resistor (actually a 0 ohm jumper), located on the far
left side of the exposed circuit board, located to the
"northwest" of the speaker. There is a marking in white
letters, OP/CL, this resistor is over the top of the "P".
It is the only green component visible on the board.
(This radio does not have the traditional Alinco red
and blue wires which have become so familiar...)
5. Carefully remove this resistor, using a small tip soldering
iron, tweezers and a steady hand.
6. Re-assemble the radio, being careful that the thin rubber
gasket is seated around the inside edge of the rear cover.
Replace the batteries, press and hold the "F" button on the
left side of the radio, and turn it on. The display should
show all segments and markings. Release the "F" button and
the radio will now be capable of operating from approximately
425 MHz to above 470 MHz, depending on the VCO's tuning.
The display will blink if the VCO is taken out of its range.
Re-tweeking of the VCO is not recommended.
THE NOT-SO-FINE PRINT:
7. Although reception on the expanded frequencies is legal,
transmission is not. This unit is not FCC type-accepted
for anything but ham band (425 - 440.995 MHz) operation.
the mods-a-d file section.