View and Download President HR owner’s manual online. 10 Meter Amateur Transceiver. HR Transceiver pdf manual download. Also for: Hr View and Download PRESIDENT HR user manual online. 10 Meter Amateur Mobile Transceiver. HR Transceiver pdf manual download. PRESIDENT LINCOLN (HR ) MODS by Roger Perales ~ perales Conversion of this text from html format to PDF by Frank TomeŇ°.

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Probably not worth it, especially with the solid-state amps that are out there on the market. Suite Santa Rosa, Ca. More obscure notes from KM6ZQ. Adjust ment Remarks Manuzl These components are located to the left facing the front of the radio of IC Any time one of them would transmit, the entire band range of the would be blanketed with white noise. I plan on leaving it in. This reduces the overall tuning range of the RIT quite a bit, and makes fine tuning a lot less touchy.

The center frequency of both filters is You must use a 1N diode, because a 1N will not handle the current on TX.

These two components are connected to the base of Q To modify this, locate R96 a 2. That extra couple of watts will never make it to the guy on the other end, but it will sure tick off your neighbors.

Please include My web address somewhere on your site as well. I then removed the stock lamp and suspended a pair of 12v micro-lamps from Radio Shack through two of the holes in the top. To key the relay you connect one side of the Relay coil the side with the Cathode of the diode to IC pin 1. Open the Mic and remove the ground from the Up and Down Switches and connect the common of the switches to the TX lead. Seems kind of silly. The Chipswitch replacement CPU will not compensate for this either, and the people at Chipswitch haven’t shown any interest in releasing a new version to allow for this mod.

  ASTM D3666 PDF

PRESIDENT HR2510 User Manual

Maunal bought mine from the friendly folks at Bill’s 2-way. I did not concern myself with fixing LSB, since That may help in your conversion. Everyone has a different mod for this one, I will list the ones I know. Cut the Yellow wire from pin 3 of the Mic plug. This mod was originally written by M.

The changes to the Mic are required because of these differences in the control operation. Repeat using TP and VR As can be seen from the graph, the HTX filter is indeed significantly narrower than the filter.

SMHR – Uniden Service Manual For Hr

Use a 10k ohm resistor if you only use the internal speaker. You get memories, repeater splits, and 12 Meters too! If you operate quite a bit of AM, you will notice that AM signals do sound more muffled with the narrower filter.

Cathode to Cathode of the two diodes on pin 3 of the Mic plug. There is only so much ‘headroom’ in the transmitter strip, and too much AM power will cause signal clipping and distortion. If you want repeater splits, get a Chipswitch.


Connect the power wire to the 5 volt regulator pin 3 facing the front of the radio, the far right leg of the L78MO5CV, located in the middle of the microprocessor circuit board. You may be able to peel the epoxy right off to expose the pins of the IC.

This will give complete coverage from This is where I get to express my opinion of some nanual the other mods floating ,anual out there. Any value between and picofarad pf will do. This is a 3 pin transistor bolted to the left side of the case next to VR Chipswitch can be ordered by Phone directly from the manufacurer, there address is: This was caused by the use of switching diodes across the IF crystal hr25100 in this mod.

Connect the output wire from the Isolation resistor on pin 10 of the CMOS IC to the 2nd trace from the top trace on the frequency knob.

Adjust VR for The Chipswitch does this internally. My solution to the problem was to drill several small holes in the top and sides of the LCD holder for cooling.