Modifications for the ICOM - RogerK

21-03-1999(IC-2100) Icom IC-2100H Extended Transmit ModFor the first time anywhere on the web, the Icom IC-2100H extended frequency transmit modification and mod instruction sheet.The socessor to the very popular IC-2000 unit, the IC-2100H has been around for a few months now and is selling for about$200 at most hamfests. The unit uncludes PL encode/decode, and 55 watts out at high power. But up until now the modificationinsturctions have been unavailable!Brought to you by:Spectracom Communications, for all your commerical radio needs call 732-989-1091 or e-mail toSpectracom98@webtv.net.MODIFICATION.NETW3EAX, Amateur Radio Association at the U of MarylandKB3CVD, UMBC Amateur Radio ClubAnd amateur stations KC2AEI and W2SJW.Please give us credit when copying these instructions!1. Hold down the second and third front function buttons while turning the radio on. Now turn it back OFF.2. Carefully remove the large tuning knob and remove the two hex screws that hold the faceplate on. Pull the faceplatestraight of the body without tilting it (you run the risk of bending the pin connectors behind the faceplate).3. Turn the faceplate over and locate the main ic chip, set at a 45-degree angle. Just to the lower left and right of the IC, youwill see the main pin connectors. Under the lower right corner of the left pin connector, you should see a marking on the pcboard labeled as "D16". just below this should be the matching diode, close to the bottom edge of the board. Remove thisdiode and carefully re-assemble the radio(watch those faceplate pins!!The radio will now TX 136-174 Mhz. As far as i know, you do not have to reset the memory to make the mod work( i have 70 outof-bandmemories stored, all of them worked without resetting the unit!!!!!September 5, 1998 - KC2AEIThanks to Chris KB3HPF for the pics.Date: 03-02-2002 User comment From: JasonSubject: ic-2100h modSo D-16 is the diode to cut, or the one that looks like it?What is the number of the one you cut?Date: 06-03-2002 User comment From: k1phsSubject: ic-2100H modI just performed the mod and it worked like a charm. I would however, recommend only lifting one leg of the chip in case youscrewed up and did the wrong one.