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Author Message   Tech808 Moderator Username: Tech808 Post Number: 4350 Registered: 8-2002 Posted on Wednesday, December 22, 2004 - 8:30 am:        PRESIDENT LINCOLN COPPER PART #E50-10002 CW~AM~FM~LSB~USB 10 METER MOBILE AMATEUR TRANSCEIVER Complete Specifications, Modifications, and Non - Technical Review. By Lon ~ Tech808 ~ N9OSN GENERAL SPECIFICATIONS: Frequency Coverage 26.000MHz to 29.700 Frequency Control Phase Lock Loop (PLL) System Channels 170 Modulation Modes AM/FM/SSB/CW Antenna Impedance 50 ohm Power Requirment 13.2 VDC ~ Negative Ground Dimensions 7.4" (Width) x 2.4" (Height) x 9.8" (Depth) Weight 4.4 lbs Jacks & Connectors MIC 5 Pin Connector, DC Power 2 Pin Connector, 9 Pin Accessory Connector Antenna Connector UHF SO-239 Accessories Supplied Microphone Up/Down with support / Mounting Bracket / Screws / and Fused Power Cord TRANSMITTER SPECIFICATIONS: Power Output AM / FM / CW ~ 10 Watts / SSB ~ 21 Watts Frequency Allowance +/-300Hz PLL UC-1201A Final Transistor MRF455 (x1) Transmission Interference Inferior to -50 dBc Audio Response 300Hz - 3kHz AM/FM/SSB FM Deviation +/- 2kHz maximum Microphone 500 Ohm, Dynamic Type with Channel Up/Down Microphone Sensitivity 0.6mV Speaker 8 Ohm,3W Modulated Signal Distortion 2.5% Drain 4.5 Amp with Modulation Output Impedance 50 Ohms Unbalanced SSB Filter 10.695 Mhz Crystal Lattice Type 6dB@4.2 KHz, 60dB@7 KHz SSB Carrier Supression More than -45dB Unwanted Sideband More than -45dB RECEIVER SPECIFICATIONS: Maximum Sensitivity at 20 dB sinad AM 0.5 µV - 113 dBm (AM/FM) / 0.4 µV - 115dBm (SSB) Frequency Response 300Hz to 3 kHz in AM/FM/SSB Maximum Audio Power 4W Squelch Sensitivity mini 0.5 µV - max 1 mV Frequency Image Rejection Rate 70 dB Drain 1 A Nominal FEATURES: Owner's Manual Very Well Written and Easy to Understand all Funtion's/Operation's for the 1st Time User. Channel Selector Manual or Electronic Up and Down Keys Volume With Power On / Off Control ~ Knob Squelch Control ~ Knob LCD DISPLAY With RX/TX / Mode / SWR / S/RF / Frequency / Channel / Band Jack / 9 Pin Plug For External Speaker / PA / CW Key F-LOCK Frequency Lock ~ Button F-LOC DX / Selector ~ Button Mode Selector ~ Knob SPAN VFO ~ Button SCAN YELLOW ~ Button RF Power Control ~ Knob MIC GAIN Hi/Low Button INDIC Button NB/ANL Button BEEP Roger Beep ~ Button Clarifier RIT Control ~ Knob SWR Calibration Control ~ Knob PA Public Address ~ Button NB Noise Blanker ~ Button DIM ORANGE Dimmer ~ High/Low Button SWR Calibration Control ~ Knob Band Selector CW~LSB~USB~AM~FM Control ~ Knob TX/RX LED Indicator / Bar Graph ACCESSORY CONNECTOR #1 ~ When using the Internal Speaker Only, insert the plug with a short wire between Pins #1 and #7. #2 ~ Pins #1 and #2 are used to connect an External Speaker. #3 ~ Pins #4 and #8 are used to connect a PA Speaker. #4 ~ Pins #8 and #9 are used to connect a CW/Morse Key #5 ~ NOTE! PINS #3, #5 and #6 Are NOT Used! MICROPHONE WIRING: PIN #1 ~ AUDIO PIN #2 ~ SHIELD PIN #3 ~ TRANSMIT PIN #4 ~ CH PIN #5 ~ CH PROS & CONS PROS The backlit LCD Display allows you to monitor the frequency, channel and signal strength. The Integral Meter will allow you to monitor the RF Output, Signal Strength, SWR or Modulation - depending on which display setting you select. The channels are arranged in banks of 50 (ie 0.5MHz), and you can change from one bank to another with the press of the "BAND" button. Your tuning can be done by 3 different methods, #1 ~ By using the VFO / Rotary Channel Selector. #2 ~ By using the Channel Slector Up/Down button's on the radio. #3 ~ By using the Channel Up / Down buttons on the microphone. The tuning step's can be selected from 10KHz, 1KHz or 0.1KHz. One of the advantages this radio has over it's competitors is that it has true continuous tuning rather than just tuning between "channels" - if you wish you can tune the entire band in any of the step (as low as 0.1KHz). In contrast the other radios only allow 1KHz tuning "between" channels (ie if you tune up from XX.9 the next step is XX.0). The Output Power on AM, FM and CW is continuously variable, however the power on SSB is fixed and can only by altered by varying the microphone audio level. CONS I would like to see the 9 Pin Accessory Plug replaced with standard mini plug jacks ie: External Speaker Jack, CW/Morse Key Jack, PA jack. I would also like to see a Variable SSB Power Control added. Get rid of the Roger Beep and maybe use that Button for a High and Low Power for SSB Use. REVIEW and COMMENTS The President Lincoln radio is probably one of the most popular 10 Meter Radios that has ever been produced. It first came on the scene in the Mid 80's for the radio enthusiast and is still one of the most popular 10 Meter radio's there is. The simplicity / ease of use of this radio has made it very popular over the years for the first time user as well as for the more experienced users. Over the years there have been several minor improvements / modification's that have been made over the year's to make this radio even better for the user. The Biggest improvement in my personal opinion that has been made to this radio over the years is the changing / replacement of the Original MRF477 Output Transistor and replacing it with the Higher Rated MRF455 Output Transistor. While the President Lincoln Radio does not have all of the bells and whistles of some of the newer radios on the market today, it is still one of the most popular and easiest to use and best sounding radio's there is. Over the years the President Lincoln has developed a World Wide Reputation for Quality and Performance and is one of the most popular 10 Meter radio's ever made. It is hard to find a more Reliable / Dependable time proven radio than the President Lincoln Radio. I would Highly recommend this radio for any first time user just entering into the hobby as well as for the more experienced users who are looking for a GOOD RELIABLE / DEPENDABLE 10 Meter Radio. Respectfully Submitted, Lon Tech808 N9OSN