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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There are lots of good descriptions of mods floating around to enable the RIT to function on transmit, so I won’t re-invent the wheel here.

PRESIDENT HR2510 User Manual

A 3 dB increase in power is a doubling of power output. This mod was originally written by M. Q is located near the front of the circuit board in the center to the left of ICabove C Adjust VR so that squelch just breaks.

The RIT only works on the receiver. Suite Santa Rosa, Ca.

This is a 3 pin transistor bolted to the left side of the case next to VR Be careful how high you set the AM power, also. Seek-This causes the radio to seek for active channels. The center coil is labeled L, adjusts LSB. Use a 10k ohm resistor if you only use the internal speaker. The only thing that I can add is that I placed a short across diode D when I did my mod. I’m currently investigating a more readily available part for this mod. Doc’s Radio Repair Repair and Mods for lots of interesting rigs.


Uniden HR Service Manual

Find J, located on the top left corner of the Microprocessor board. If you are an Meter ‘freebander’ and are reading this page, I strongly encourage you to become a licenced ham and cease illegal operations on 11 Meters. This reduces the overall tuning range of the RIT quite a bit, and makes fine tuning a lot less touchy.

This effect will be mitigated somewhat in the HR due to the fact the the transmitter uses low-level modulation for AM and the signal is bandpass filtered by the IF crystal filter, as opposed to the classic high-level modulation that is used in older AM transmitters, but the result is still not good. I reasoned that thebeing an ‘allmode’ radio with AM included, may use the common CB radio design practice of having a wider ‘compromise’ IF crystal filter to improve the RX audio response on AM.

Remove both covers from the radio and look for the Mic jack. Seems kind of silly. This Mod also allows for an automatic frequency increase or decrease as long as you hold the button down. Connect the oscilloscope to TP1.

PRESIDENT HR Service manual |

Connect a Frequency counter to TP Set th output of the S. Connect the ground wire to a good circuit ground. To get more, Q is the Mic Attenuator, This limits the audio. DC Power supply The center frequency of both filters is Did you ever wonder what those 2 extra adjustment pots on the synthesizer board are? Click HERE for a good explanation of power amplifier classes of operation; this description discusses tube amplifiers, but the concepts are the same for solid-state amplifiers. As a licenced amateur radio operator, I am publishing this information for the use and benefit of the ham community.

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With the flat side of the transistor facing you and leads pointing down: Rogerbird has a good mod on his web site to increase the overall gain of the audio stages, but I didn’t think this was my problem.

The right coil labeled L, adjusts CW.

Don’t rely on a modulation meter, the only way to see what is really going on is to monitor the RF output with a scope. This is a very versatile update.

This is where I get to express my opinion of some of manua other mods floating around out there. Tie a jumper wire from the thru plate via hole at the end of the trace the bare end of the 10K ohm Resistor. The rest of the s gates are used as gated inverters. You can’t go wrong with these folks.

Fri, 15 Aug Refer to the Diagram below and create the circuit shown.