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1.
Remove top cover ( 8 screws)
2.
Turn unit upside down and remove 3 screws holding main unit to chassis and one more
on back side below "ant" port. Unit should be free from frame chassis.
3.
Turn unit on side, with main unit facing up. On left hand side of main unit
disconnect J2 & J3, then maneuver the main unit out of chassis about 2 or 3 inches.
4.
On bottom right of board disconnect J7. On left side see 4 resistors. Next to them
see 4 phono plugs. Disconnect J2 or bottom left one.
5.
Remove 8 screws holding main board to filter unit ( They may have blue or green
colored loc-tite on them ).
6.
Separate the two units and totally lift the LPF unit from chassis. TAKE CARE
...DON'T TEAR ANY CABLES.
7.
SET THE 2KL CHASSIS ASIDE.
8.
Look at the LPF unit ... Become familiar with design scheme ... Look at relays &
coils & caps ... notice empty spot (near ant conn). This is where the 10 meter
modification goes.
9.
Remove 3 screws holding back cover plate. Remove plate cover.
10.
We need to remove some parts that are in the way and some jumpers before installing
our parts. so refer to Fig 1 and remove in the following order( so none are missed )
1) Cap on component side
2) Cap on component side( silk screening may say C4 )
3) Coil on component side (silk screen may say L1)
4) Jumper on foil side (It is shorting one side of L1 to ground).
5) Jumper on component side.
** 6) REMOVE ANY CAPS tacked on the foil side. There should be nothing on the foil side
but jumper(insulated) wires.
11.
Now we can install our wires & parts. BUT FIRST ... REFER TO
FIG 2 and clear solder from the holes where the parts &
jumpers go. Let's do the jumper first. Open parts bag &
remove a white looking resistor. (its actually an insulated
jumper). Cut both leads off at the body and discard
body. On component side, install the two jumpers detained
in Fig 2 and by dashed lines(silk screening) on the board
itself. KEEP THEM FLUSH TO THE BOARD ... NOT BOWED !!
11-9-90 DV:vlm
2KL – 10 METER MODIFICATION
Page 1 of 3
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Summary of Contents for Icom 2KL
- Page 1 2KL – 10 METER MODIFICATION Remove top cover ( 8 screws) Turn unit upside down and remove 3 screws holding main unit to chassis and one more on back side below "ant" port. Unit should be free from frame chassis.
- Page 2 All soldering should be CLEAN & NEAT! Trim excess lead lengths .. Now the two wire jumpers. Notice how there is a wire draped across each relay for each band ? This is the idea for our wire, Look below the RL1 spot (on the silk screening) and see "n ". This is where one end of wire #1 goes.
- Page 3 Maneuver the LPF unit behind the main board( orient the plugs thru the slots ) and secure with 8 screws. Re-seat this assembled unit into the 2KL chassis and install. Three bottom screws (loosely) and one rear panel screw. Once all screws are inserted, then tighten securely.
- Page 4 The first thing you do in the ICOM modification is removing the Low Pass Filter unit from the 2KL. I would recommend taking a picture of the manner in which the 12 or more cables are plugged into that unit. I didn't think of that until just now, but I did mark each cable so it would go back in the right spot.
- Page 5 Now, when the exciter is switched to either 24 or 28 MHz, the little green LED lights up, if the 2KL is in the REMOTE position. When it is off, you can't even tell that there is a LED installed there.