Lincoln HR2510 Alignment Instructions - (Taken from the Uniden Service Manual)

PRESIDENT LINCOLN (HR 2510) MODS by Roger Perales http://www.gj.net/~perales www.president.com Downloaded from www.cbradio.nl Table of Contents To convert the HR2510 to 11 Meter operation: ....................................................................................... 4 To convert the Lincoln to 11 Meter operation: ....................................................................................... 5 HR2510 Modification for increased MicGain .......................................................................................... 6 President or Uniden HR-2510 Variable Power Modification ................................................................. 7 Increasing the power output for the HR2510 ........................................................................................... 8 Modification of the HR2510 Mic buttons to operate the VFO ............................................................. 10 MOD # 1 ........................................................................................................................................ 10 MOD # 2 ........................................................................................................................................ 11 Talkback Removal..................................................................................................................................... 13 MOD #1 - The Relay Approach .................................................................................................. 13 MOD #2 - The Solid State Approach I ....................................................................................... 14 MOD #3 - The Solid State Approach II ...................................................................................... 15 HR2510 RIT / Clarifier Mods ................................................................................................................. 16 RIT MOD I ................................................................................................................................... 16 RIT MOD II .................................................................................................................................. 16 RIT MOD III ................................................................................................................................ 16 RIT MOD IV ................................................................................................................................. 17 HR2510 Misc. Enhancements. ................................................................................................................. 18 Increasing the Receive Audio I .................................................................................................... 18 Increasing the Receive Audio II .................................................................................................. 18 Increasing the Receive Audio III ................................................................................................ 18 Mute circuit improvement ........................................................................................................... 18 Roger Beep Mods .......................................................................................................................... 18 Adding an external meter to the HR2510 ..................................................................................

To convert the HR2510 to 11 Meter operation: Remove the cover on the speaker side of the radio. You will need to loosen the 4 screws (2 on each side) that secure the SYNTH PCB Frame to the chassi. - You do not need to remove these screws - You need to remove the 4 screws that secure the SYNTH PCB to the metal frame. Now flip the SYNTH PCB over, Locate the pins of the Microprocessor. In some versions of the HR2510 there may be Grey Epoxy covering one end of the Microprocessor. You may be able to peel the epoxy right off to expose the pins of the IC. If it is not soft enough to peel off, you can use a 400W hair dryer to heat the epoxy enough to remove it. Cut the ground trace connected to pins 34 & 35, jump pins 34 & 35 to the free end of Resistor pack RR301 (see diagram) or connect a 4.5K -15K ohm resistor from pins 34 & 35 to pin 3 of IC312 (5V

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