From n1ist@netcom.com Thu Jan 26 22:19:42 1995 Received: from nuhub.dac.neu.edu (nuhub.dac.neu.edu [129.10.1.6]) by amber.ccs.neu.edu (8.6.8/8.6.4) with ESMTP id WAA10890 for ; Thu, 26 Jan 1995 22:19:41 -0500 Resent-Date: Thu, 26 Jan 1995 22:19:41 -0500 Resent-From: n1ist@netcom.com Received: from neu.edu by neu.edu (PMDF V4.3-7 #7628) id <01HMBGWM2N7M935RFL@neu.edu>; Thu, 26 Jan 1995 22:21:48 EST Received: from netcom18.netcom.com by neu.edu (PMDF V4.3-7 #7628) id <01HMBGWD5ES09362O2@neu.edu>; Thu, 26 Jan 1995 22:21:38 EST Received: by netcom18.netcom.com (8.6.9/Netcom) id TAA18896; Thu, 26 Jan 1995 19:17:30 -0800 Date: Thu, 26 Jan 1995 19:17:30 -0800 From: n1ist@netcom.com (Michael L. Ardai) Subject: Resent-to: scotte@ccs.neu.edu To: wy1z@neu.edu Resent-message-id: <01HMBGWM3ZFO935RFL@neu.edu> Message-id: <199501270317.TAA18896@netcom18.netcom.com> X-Envelope-to: scotte@ccs.neu.edu X-VMS-To: IN%"wy1z@neu.edu" Content-transfer-encoding: 7BIT Status: RO Xref: netcom.com rec.radio.amateur.equipment:9881 Path: netcom.com!ix.netcom.com!howland.reston.ans.net!paladin.american.edu!hookup!news.kei.com!newshost.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!agate!darkstar.UCSC.EDU!news.hal.COM!decwrl!tribune.usask.ca!quartz.ucs.ualberta.ca!vm.ucs.ualberta.ca!CJSRFM From: CJSRFM@vm.ucs.ualberta.ca Newsgroups: rec.radio.amateur.equipment Subject: Icom IC-2700H Mods Date: Thu, 26 Jan 95 01:10:07 MST Organization: University of Alberta Lines: 105 Message-ID: <173321073S86.CJSRFM@vm.ucs.ualberta.ca> NNTP-Posting-Host: vm.ucs.ualberta.ca Hi there! From Icom USA comes this mod sheet for the 2700H: RX Expansion Modification ========================= 1. Remove Top Cover. (6 Screws) 2. Remove Bottom Cover. (6 Screws) 3. Remove Front Display. (4 Screws) 4. Locate the Logic Board. 5. Remove W1 from the logic. 6. Hold [SET], [SPCH] and turn radio on. Expanded Frequency Range AM Mode 118-136 MHz FM Mode 138-174 MHz 350-470 MHz Tx Expansion Modification ========================= 1. Remove D16 and D17 2. Hold [FUNC], [A], [CLR] and turn the radio on. FM Mode 138-174 MHz 350-470 MHz ------------------------------------------------------------------ That's what Icom's sheet said. I didn't follow it when I modified my radio and it worked very well. Here's what I did: 1. Remove power and antenna from the rig. 2. Remove the face plate from the rig (careful with the small hookup cable that attaches to the logic board). 3. Locate the "Zero-Ohm Resistor" W1 and cut it out with a fine-tipped set of wire cutters. W1 is clearly marked on the board and is along the top edge, just to the right of center of the logic board. In my rig, W1 looked like a 1/8 Watt resistor, solid white in colour. 4. Using the same pair of fine-tipped cutters, remove D16 and D17. They're the first two diodes slightly below W1, going towards the LEFT side of the rig. 5. Carefully re-attach the face plate, mic, antenna and power. 6. Press SET and SPCH together and power on the rig. Keep the buttons depressed for about 4-5 seconds as the radio goes through a reset. ALL MEMORY INFORMATION IS LOST!!!. 7. Re-program in your memories and there you have it! Futile Attempt at a diagram: Front View with face plate detached. ________________________________________________________________________ | DDDDD W | | | | D67 | | ____ | | |HEAD| ___ | | ~~~~ |MIC| | |______________________________________________________________________| Where D = Surface Mount Diode Package W = Jumper W1 6 = Diode D16 7 = Diode D17 HEAD = Face Plate Connector MIC = Mic Connector I hope that the diagram and description are clear enough to follow. For X-Band repeating, the only information that Icom game me was a brochure entitled "With Icom Radios, Crossband Repeating Has Never Been Easier!" In short, the only way I've been able to find to get the 2700 to x-band repeat is to put it into remote mode and use the appropriate DTMF code to turn it on. It works fine in this mode. I've done extensive testing and all these functions appear to work fine: DTMF CODE FUNCTION ========= ======== B, XXX, # Remote function ON (XXX = 3 digit password) B* Remote Function OFF DB* Cross Band Repeat ON DB, XXX, # Cross Band Repeat OFF (XXX = 3 digit password) 1 Call 2 Memory 3 VFO 6 High Power 9 Low Power DC Speech D (+NNN) Enter (Direct entry of mem. chan. or VFO Frequency) # Up * Down A Clear That's all the information I've got to date. So far, I haven't been able to find a method of putting the rig into X-Band repeat without using the remote control function. It'd be nice to be able to do that from the rig or mic. Hope this information helps! 73 Ray Semenoff VE6RHS Chief Engineer (and Bottle Washer) CJSR FM University of Alberta Edmonton, Alberta, CANADA.