Icom IC-2KL 10/12 Meter Mod???

[N4MTB]

Does anyone have any information on unlocking 10/12 meters on the IC-2KL??? Google didn't have much.
Thanks for the help.

Mike de N4MTB

[W9GB]

Answer to identical 2008 question here on QRZ
http://forums.qrz.com/showthread.php...dification-Kit

WARNING WILL ROBINSON ....

The 10/12 modification for the Icom IC-2KL is NOT an "easy cut a wire" !!
It requires a specific KIT of parts (capacitors, coils, etc.) and requires surgery on various PC baords within the unit.
The technician instructions consist of 22 steps (disassemble and steps for mod installation) ..
THEN you have to reassemble by reversing the previous 22 steps covered.
===
The original Icom IC-2KL kit of parts for the 10 meter modification is no longer available from Icom !!

Icom IC-2KL manuals (and 10/12 instructions) at bottom of this web page
http://www.qsl.net/icom/manuals.html

Contact Icom America Tech Support or
http://www.icomamerica.com/en/support/default.aspx

Scott Malcom at MTS in Toledo, WA.
Scott does perform this work and MAY have the kit of parts.
http://www.angelfire.com/biz2/mts/

BTW, Icom has a service bulletin (KB Article Number 729E66499A; May 1, 1989)
for this IC-2KL amplifier about potential failure of C8 and C9, causing oscillations in amplifier.

w9gb

[K0BG]

It depends on the serial number too. Some intermediate units had 10 meters pre-installed, but the front panel switch position wasn't there. Thus operating on 10 meters, required the correct band voltage to be applied. I have two 2KLs, and this is the case with both of them. As mentioned, if this isn't the case, you'd best forget the mod because the requisite parts are no longer available. Period!

[KR6DY]

I have an IC-2KL which has apparently had the 10m mod done judging by the notes in the manual. However, I have seen no instructions about how to make it switch to that band. I am using it with a Cushcraft R-7 connected to antenna port #1 on the AT-500. I use the AUTO position on the amp and the 24-28 position on the AT-500. With the system set up this way the amp goes into overload using reduced power (200-300 watts) after 2-3- transmissions. Other bands perform at full power. I do have to manually switch bands in this configuration. Has anyone gotten this configuration to work?
tnx & 73
Dave
KR6DY

[W9GB]

I use the AUTO position on the amp and the 24-28 position on the AT-500.

Dave -

DO you have the proper Icom OPC-118a interconnection cables ??

WHAT HF Transceiver are you using for this Icom IC-2KL and AT-500 ?
Is it an Icom transceiver?

Icom Amplifier/Tuner Interface Cable: OPC-118a
by Bob W2ENY
The newer Icoms 725, 726, 728, 729, 735, 736, 737, 746, 746PRO, 756, 756 PRO I II III, 761, 765, 775, etc. refer to the OPC-118 adapter
in their manual for interfacing to the AT-100, AT-500 tuner and IC-2KL amplifier... BUT this cable is no longer available from Icom !!!

Bob, W2ENY is the only person making the Icom IC-2KL / AT-500 / Transceiver Interconnection cables
(These arer NO longer available from Icom)
http://members.fortunecity.com/w2eny/

Robert Langston
286 Hudson Street
Cornwall-on-Hudson, NY 12520

w9gb

[KR6DY]

Hi W9GB,

Yes, I do have the proper cables. I am using an IC-756 PROII to control the whole system. Everything worked fine until I connected the R-7 to port 1. This evening I found that if I stay on 10/15/20m (which are the bands that port 1 wants to see) I can run on AUTO, although I have to cut the power back on 10m. I'm wondering if the R-7 is adjusted for the CW portion of 10m and not the phone band. I'm going to put the analyzer on it tomorrow and check that before I scratch my head any further.

thanks for your help

Dave
KR6DY

[W9GB]

I'm wondering if the R-7 is adjusted for the CW portion of 10m and not the phone band.
I'm going to put the analyzer on it tomorrow and check that before I scratch my head any further.

Dave -

Points for the Cushcraft "R series" HALF-WAVE --

1.) CHECK your Black Matching Box (to see if Toroids are OK and not cracked)

2.) The length of your lowest base section, before first trap, determines the resonant point for 10 meters.
IF you desire 10 meter Phone section -- then you will likely have to shorten the length a bit.
Antenna Analyzer useful to find where the current resonant point is BEFORE adjusting.

3.) While the Black Matching box has a choke balun -- you may still have some common mode issues.

w9gb