PRESIDENT LINCOLN Modification Manual

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Owner's manual (42 pages)

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Page 1 PRESIDENT LINCOLN (HR 2510) MODS by Roger Perales http://www.gj.net/~perales Conversion of this text from html format to PDF by Frank Tomeš http://come.to/329RC106 Radio Modification Information This site is provided for the sharing of information for educational purposes only. The use of this information may void your radios warranty, The modification of your radio may make its use illegal.
Page 2: Table Of Contents
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 .............
Page 3 Synthesizer / Microprocessor / PLL PCB ................... 27 Main PCB............................27 HR2510 Circuit Block Diagram....................... 29 Microphone wiring............................ 29 Some interesting e-mails ........................... 31 Subject: Re: Kterou stanici vybrat ? .................. 31 Subject: Re: Lincoln mods homepage ................32 Subject: Mirror........................32...
Page 4: To Convert The Hr2510 To 11 Meter Operation
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.
Page 5: To Convert The Lincoln To 11 Meter Operation
To convert the Lincoln to 11 Meter operation: Remove the cover on the speaker side of the radio.. Locate the the Microprocessor on the SYNTH PCB. Tie a jumper wire from the thru plate via hole at the end of the trace the bare end of the 10K ohm...
Page 6: Hr2510 Modification For Increased Micgain
HR2510 Modification for increased MicGain This mod will increase the AM modulation. The AM modulation adjustment is VR114, which is marked >AMC= on the main circuit board. To get more, Q114 is the Mic Attenuator, This limits the audio. Q114 is located near the front of the circuit board in the center to the left of IC 104, above C153. To modify this, remove Q114 and bend the Emmitter leg up from the circuit board and re install.
Page 7: President Or Uniden Hr-2510 Variable Power Modification
President or Uniden HR-2510 Variable Power Modification The HR-2510 does not have a varible output power feature as it comes from the manufacturer. The following modification will allow you to fix that oversight.
Page 8: Increasing The Power Output For The Hr2510
Increasing the power output for the HR2510 1). Remove the top and bottom covers. 2). Locate and remove Q132 & Q134. 3). Replace Q134 with an ECG 340 or TCG340. WARNING!!! The leads of the two transistors are exactly opposite of each other. [ 2SC2086 = BCE ;...
Page 9 With the radio on USB, Adjust VR112 for 80mA +/- 5mA on the DC Ammeter. After the adjustment is complete, Reinstall the B002(PB-100) jumper board. ] 10). inject a two tone signal into the microphone of the radio while transmitting into a dummy load. Set VR104 (ALC) for maximum output..
Page 10: Modification Of The Hr2510 Mic Buttons To Operate The Vfo
7. Connect the Brown wire, cut from J308, to the White wire (Orange in the Lincoln) on the back of the rotary switch. 8. Connect the Orange wire, cut from J308, to the Grey wire (Brown in the Lincoln) on the back of the rotary switch.
Page 11 NOTE: If the Up / Down buttons work backwards, exchange the Orange and Brown wires. MOD # 2 Mod #2 is the same principal as Mod #1, But uses a Solid State approach, and does not require rewiring of the Microphone. This Mod also allows for an automatic frequency increase or decrease as long as you hold the button down.
Page 12 3. Connect the output wire from the Isolation resistor on pin 11 of the 4001 CMOS IC to the top trace on the frequency knob. (the white wire). 4. Connect the output wire from the Isolation resistor on pin 10 of the 4001 CMOS IC to the 2nd trace from the top trace on the frequency knob.
Page 13: Talkback Removal
Talkback Removal MOD #1 - The Relay Approach One method of Talkback removal is to break the speaker line with a relay. Parts needed : 12Volt SPDT relay 2 - 1N4148 Diodes 1 - 1N 4001 Diode Several pieces of hookup wire Jumper the Relay coil - K1 with a 1N4001 Diode - D1.
Page 14: Mod #2 - The Solid State Approach I
MOD #2 - The Solid State Approach I All that is needed is to add a 1N914 Diode from pin 6 of IC103 to the collector of Q125. Connect the cathode of the diode to pin 6 of IC103, and the anode to the collector (the center pin) of Q125.
Page 16: Mod #3 - The Solid State Approach Ii
MOD #3 - The Solid State Approach II All that is needed is to add a 1N914 or a 1N4148 Diode connected to a 10k to 100k resistor from pin 6 of IC103 to the Base of Q127. Connect the anode of the diode to one side of the resistor. Connect the other side of the resistor to pin 6 of IC103, and the cathode to the Base of Q127.
Page 17: Hr2510 Rit / Clarifier Mods
HR2510 RIT / Clarifier Mods The RIT (Receiver Incremental Tuning) on the HR2510 is a Clarifier control to help >tune in= usually SSB signals that may be transmitted off of center. The RIT only works on the receiver. The HR2510 does not allow >slide= on transmit unless its modified.
Page 18: Rit Mod Iv
Connect a Frequency counter to TP304. Adjust L318 for 38.695Mhz Connect a frequency counter to TP1. Set the Mode switch to USB, adjust L116 for 10.6975Mhz. Set the Mode switch to LSB, adjust L118 for 10.6925Mhz Set the Mode switch to CW, adjust L117 for 10.6950Mhz Check RIT range.
Page 19: Hr2510 Misc. Enhancements
HR2510 Misc. Enhancements. Increasing the Receive Audio I The HR2510 does not have a by-passed emmiter in the audio circuit. To correct this, Add a 4.7uf 16v Electrolytic capacitor across (in Parallel) with R152 (a 560 ohm resistor). This modification will increase the receive audio.
Page 20: Adding An External Meter To The Hr2510
Adding an external meter to the HR2510 To add a needle type meter all you need to do is connect it to C302 on the Microprocessor.
Page 21: If You Are Really Interested, I Suggest Trying The Chipswitch
If you are really interested, I suggest trying the CHIPSWITCH. It gives you : 1) 30 memory channels, with temporary channel lockout and repeater offsets. 2) Extended frequrncy covreage - 24.800 to 29.999 Mhz. 3) Programmable Scan/Seek functions. Scan-This allows you to set a range of frequencys in any band, and even set the hold time during scans.
Page 22: 24 Mhz Broadband Instructions For Your Hr2510
24 MHZ Broadband instructions for your HR2510 These instructions are to broadband your radio if you have the 24.000Mhz mod or the ChipSwitch installed. MOD #1 1. Take the four screws out of the speaker cover on the radio. 2. With the radio upside down and the PLL board facing you, Remove the four screws in each corner of the pll board.
Page 23: Mod #2 A Simpler Method
MOD #2 A simpler method... Here is a simpler method of increasing the VCO coverage on the HR2510. If your HR2510 is Chipswitched, but doesn't lock on 12 Meters, this mod will take care of the problem without having to access the underside of the synth PCB. Remove the four screws from the bottom cover and remove the cover.
Page 24: Hr2510 Alignment Instructions - (Taken From The Uniden Service Manual)
HR2510 Alignment Instructions - (Taken from the Uniden Service Manual) Alignment of P.L.L. and Carrier Oscillator Portion 1. Test equipment required: DC Power supply (13.8V) DC Voltmeter Dummy Load (50 Ohm) Frequency Counter Oscilloscope 2. Preperation for Alignment: PA SW : Off Mode SW : AM RIT : Middle Position TX SW : Off...
Page 25: Alignment Of Transmitter Portion
Alignment of Transmitter Portion 1. Test equiptment required: DC Power supply (13.8V) more than 10A AF S.S.G. AM FM (1kHz, 500Hz and 2400Hz) RF VTVM Oscilloscope DC Ammeter RF Power Meter AF VTVM Dummy Load (50 Ohm) FM Linear Detector 2.
Page 26 30 mV Mod. VR104 Adjust VR104 for 32.5V reading on the RF VTVM. Ditto VR106 Adjust VR106 so that the carrier leakage at USB and LSB becomes minimum and almost equal. Mode: CW VR103 Connect a SW between Pin 8 and 9 of the ACC connector. No Mod.
Page 27: Alignment Of Receiver Portion
Alignment of Receiver Portion 1. Test equiptment required: AF VTVM DC Power supply (13.8V) Oscilloscope Dummy Load (50 Ohm) S.S.G. AM FM (28.000MHz, 1KHz, 30% Mod. and 50 Ohm Impedance) 2. Preperation for Alignment: NB SW : Off Mode : AM PA SW : Off Squelch : Min.
Page 28: Hr2510 Alignment And Test Point Layout
HR2510 Alignment and Test Point Layout Refer to the HR2510 Alignment instructions (The colors correspond to the adjustment procedure) Synthesizer / Microprocessor / PLL PCB...
Page 29: Main Pcb
Main PCB...
Page 30: Hr2510 Circuit Block Diagram
HR2510 Circuit Block Diagram Microphone wiring...
Page 31: Some Interesting E-Mails
Vas nazor: Kterou stanicku ? Do dnes mam Gianta, neni to spatny, ale co PREZIDENT EMPEROR SHOGUN PREZIDENT LINCOLN IRC. Zdravim ono je to skoro jedno, protoze shogun je po VF strance temer identicky s lincolnem vcetne jeho nesvaru.
Page 32 selektivitu, citlivost, potlaceni AM a zrcadla. shogun je na tom o neco lepe (provedli nejaka vylepseni). linkos je trochu sirsi a tudis mene vhodny pro provoz na CB pasmu v FM. tyhle stanice jsou obvodove predurcene pro SSB. da se znich vyzdimat pres 30W. Bohuzel dost trpi na koncovy stupen - taky dost zere a topi. Pokud chces excelentni stanici pro provoz na CB a SSB (nedostizna selektivita, dvojciny koncak atd...) kup si presidenta GEORGE (budes ale muset trochu pritlacit ;) GEORGE ale nechodi do 30MHz a nejmensi krok je 5kHz.
Page 33: Subject: Re: Lincoln Mods Homepage
> Are you going to try to translate it into Czech? That would be interesting! Yes, I want to translate this pages into Czech. It can very help to our local Lincoln`s users. But, I want to have your permission that I can do it and publish it on my web pages. I don't want do something without permission or publication of author`s name.

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