11DX page of 19IR059

Enhancement of Microphone Frequency Response

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Remove top cover of the radio and with the display facing you and the radio
upright locate IC3 (MJM45585) near the bottom right hand corner of the main
large board.

Just to the right of this IC locate c75 (56 pf) and remove it. This will
increase the gain of the microphone Preamp ...

Microphone contacts Realistic HTX 100

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Pin 1  = Microphone input

Pin 2* = Push to talk

Pin 3* = Scan down

Pin 4* = Scan up

Pin 5  = 8 Volts

Pin 6  = Audio out

The Realistis HTX 100 radio was also produced under Tandy and Uniden

Frequency extention mod, from 26-30 Mhz (normal 28-30)

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-Remove Power and Antenna.
-Remove screws and open the case.
-Locate synthesizer board on the bottom of the radio.

-If your radio has microprocessor # UC-1208 Unsolder and lift pins 28 & 29 of the microprocessor.
 Yo...