HR2510

              FREQUENCY MODIFICATION: PRESIDENT/UNIDEN HR-2510:

The 10-meter mobile amateur transceiver will transmit and receive from 26.000
MHz to 29.9999 MHz when the following modifications are performed:

1) Locate the CPU: IC 315 (UC-1201).

2) Pin 34 and 35 are together grounded (see the bottom - solder side). Cut the
PCB Pattern to disconnect the pins 34 and 35 from ground. Now, both pins are
free from ground and floating.

3) To activate 26.000 to 27.999 MHz (pin 35) and 29.7 to 29.999 MHz (pin 34),
just add 10 K ohms, 1/4W resistor between the pattern of pin 34 and 35 to the
pattern of DC+5V line.

NOTE: The display will indicate the EXACT 40 CB CHANNELS (Yes sir!) when "G"
band is selected.

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POWER OUTPUT MODIFICATION: HR-2510 and Realistic HTX-100.

Transmitter power output of these rigs can be increased up to 100 Watt (SSB),
when an easy modification/tune up is done.  Complete details can be found in
73 AMATEUR RADIO, september 1989, p. 48

Daniel VE2BAP @ VE2CSC.PQ.CAN.NA

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