Date: Thu, 26 Oct 89 15:19 CDT
From: SURESH KAGOO N9GSA
Subject: KENWOOD TH-75A MOD

TH-75A MARS/CAP MODIFICATION
----------------------------

This modification will allow the TH-75A to transmit from 142 to 152 MHz and 420
to 450 MHz. Specifications are guaranteed for the Amateur Bands only. Through
the transceiver will display 136 to 174 MHz and 335 to 512 MHz, the PLL circuit
may not lock through the entire range.

CAUTION
-------

Protect your license. Make sure that you operate  on authorized frequencies only.


MODIFICATION PROCEDURE
----------------------

1.      Disconnect the battery and antenna.
2.      Remove the three case screws and two battery plate screws.
3.      Lift the front panel from the body of the transceiver, but do not
        disconnect the two flex cables.
4.      Cut the green jumper wire (W1) that is located to the left side of
        the CPU in the front panel assembly.
5.      Assemble the transceiver by reversing steps 1-3.
6.      Reset the CPU by holding the M key as the power is turned on.

I have tried it and it works.

Suresh Kagoo  N9GSA   	Memphis State University 
			Memphis, Tennessee


Internet : SKAGOO@MEMSTVX1.BITNET
Bitnet   : SKAGOO@MEMSTVX1

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KENWOOD TH-75 EXPANDED FREQUENCY COVERAGE.

To expand the frequency coverage on the TH-75E to approx 138-170 and 385-470 Mhz do the following.
1. Cut the jumper wire W1 at the CPU (green wire), this opens both TX and RX.
2. Take away diode D4 also at CPU (surface mounted), this will inhibit the transmitter from transmitting outside the original range of 144-146 and 430-440 Mhz.

Jan SM7ETW @ SK7AF