Date: Tue, 17 May 88 17:09 EST From: To: MBRAMWEL@BUSINESS.UWO.CDN Subject: ICOM IC-2AT, IC-02AT Mods Wright, Tim AL7DS: "Those Tantalizing Twos," _73_ magazine, June 1986 p. 60. Description of modifications requires illustrations. Article has very good mod for IC-2AT, to cover portion of 150 MHz range and preserve ham band. The IC-02AT modifications are valid only for units with serial numbers below 34000. A simpler IC-2AT mod is described in _73_, October 1981 p. 113. -- YAESU 757GX Lert,Peter: "Bootleg HF Radios," _IFR_ magazine, Premiere issue, 1985, p. 12. Open the radio and flip an unmarked but quite accessible switch. Article also describes airborne HF antennas. -- KENWOOD 2600 West, Gordon: "All-Band Transmit Modifications," _Popular Communications_, March 1968 p. 60. Locate the two diodes standing on end with Teflon covering the top part of their leads (which at one time were soldered together, broken, and then resoldered). Simply clip these two leads to unlock the transmitter, but be sure to reset the microprocessor by pushing the reset button before the set is capable of transmitting on any frequency at 150 MHz. KENWOOD TS-430S Unplug 3-wire plug on the RF board that mates with socket 10. When looking at the top front of the radio, it's to the left front side right beside a larger white plug. You'll need to carefully examine the circuit board and locate the number 10 with a circle around it to insure you have the right plug. KENWOOD 940 Locate IC number 109. Now find diode 130 and cut it for all-band transmit. If you want just MARS coverage, locate IC 111 and 112, and snip diode 135 beside it. KENWOOD 930 Modifiable; requires several jumper. Details not given. ICOM IC-720 Transmitter is unlocked by snipping the light blue wire that's at the very end of the top hatch cover to the left middle side of the transceiver. ICOM IC-735 To unlock the transmitter: cut diodes D33 and D34 that are standing on end near the microprocessor section toward the rear top of the radio. ICOM IC-745 Locate the RF board on the side of the radio and cut the light brown wire at jack 7., which is going to pin 1. Your transmitter is now unlocked. ICOM IC-751 Locate the RF board on the side of the radio and cut the black wire going to pin 1 of jack 2. Your transmitter is now unlocked. (This mod also described in _73_, July 1985 p. 12.) ICOM M-700 Marine Transceiver Despite that the literature says, no lock-out is employed. For ham frequencies on 40, 80 or 160 meters, set the mode switch to the hard left position of "A3," to enable the lower sideband filter (all marine HF uses upper sideband). -- Frank W9MKV bitnet: reid@iubacs arpa: reid@gold.bacs.indiana.edu Copied from the QRZ! Windows Ham Radio CDROM