This is a collection of information on the Icom PCR-1000 Receiver.I purchased my PCR-1000 when they where first introduced at the Dayton Ham Fest. It has been one of the most versatile receivers in the shack. It serves as my reference receiver, as well as my make shift spectrum analyzer. Which it works very well for.
It has become more of a tool than a general coverage receiver. I keep both the frequency and the S meter calibrated for use on the bench. This page will list a few projects that I have built to add to the capabilities of this fine receiver.In my opinion the PCR-1000 is the best bang for the buck in a general coverage receiver today. Icom has recently introduced a replacement the CR-1500 and PCR-2500, but with the PCR-1000 going for about $300.00 used on ebay you can not beat it.Deviation Meter:I have built the meter, but have not documented it yet. It is only good to about 4.5 Khz but works very well.Deviation Meter - Plugs into the 9600 Baud Packet connector on the back of the radio10.7 Mhz IF output:The reason:I wanted to play with a few things like Digital Radio Mondale (DRM) and Software Defined Radio (SDR).DRM uses a 12 KHz IF. I have modified my Kenwood TS-2000 to bring out the 12 Khz IF out the ACC2 connector. I will be building a converter to take the 10.7 Mhz IF out and convert it down to 12 Khz for the PCR-1000 in the future.I also wanted to add a SDR back-end to my PCR-1000 This would allow me to use the front end of the PCR-1000 to tune anywhere in the band and use a Soft Rock 40 Lite as the SDR back-end for decoding.One of the other considerations is that I am in the planing stages of building a, which also has a 10.7 Mhz IF.
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So anything I build as an add on to the PCR-1000 will also work with my MSA when it is completed.The Research:After a little research I determined that I wanted to take the 10.7 Mhz IF off before as many IF filters as I could. After probing around with the oscilloscope the output of Q85 seemed like the best place to get what I was looking for. I also tested a few different values of capacitors to see which would preserve the signal the most.
I like the.1uf the best.Block Diagram of the front end of the PCR-1000Note that Q85 only has the Band Pass Filters in front of it.Schematic showing Q85The Dirty Work:The signal is taken off with a.1uF capacitor to get rid of the DC voltage, and fed to the back of radio to a SMA jack that I added just above the external speaker connector. To get the cable out of the RF shielded part of the radio I used my to notch a section out of the back vertical shield.Notch In rear vertical panel for coaxThe PCR-1000 is all surface mount and the traces are very small and fragile. Using a small piece of coax cable would put more stress on the traces of the circuit board that I would be comfortable with. I came up with a system that would put little if no stress on the small traces. I cut a small piece of coper clad circuit board and glued it to the ground plane near Q85.
This would allow me to install the small.1uf capacitor to the PCR circuit board and my small pad that I had glued down. The larger surface of the new pad also makes installing the small piece of coax cable much nicer. I also installed a small solder lug under the nearby ground screw to secure the shield of the coax to. This makes for a very rigid installation, and there is no worry about damaging the PCR board.Here is the capacitor mounted to the PCR-1000 and my small Coper Clad BoardSuper Glued to the ground plane. Notice the small metal tab added under the screw.Here is a close up of the solder connection to Q85The yellow area is where you want to solder the cap intoI drilled a hole in the back of the radio for a chassis mount SMA connector I had on hand. I did not remove the circuit board while drilling, which is a dangerous thing.
I blocked the area up with masking tape before drilling to keep the metal chips from getting into the radio. I also used a shop vac to vacuum up the chips as I drilled. Mr Murphy came to visit while I was drilling, and the large capacitor directly behind where I was drilling met the drill bit and tore a trace off the board when it came loose. The capacitor was not damaged, but I had to repair the trace on the board as well as glue and solder the capacitor back it place. The spacing for the SMA connector is very tight, there is just enough room to plug the speaker back into the radio.
There is less than 1/32 of an inch clearance between the two.SMA jack mounted on the back of the PCR-1000Coax path to the back of the radioThe SDR:The IF output works great.
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Icom Software Guide Icom Software GuideIcom programming software allows users to set frequencies and functions within their Icom radios. Also know as Icom Cloning Software, this software runs on your PC under the Windows Operating System.You can:.
set each channel's frequency and privacy codes. set functions for each programmable key. set parameters such as the Time-Out-Timer, and other functions. save the settings and program multiple radiosYou may download your software immediately after ordering.Warning Be advised, serious penalties and prosecution can result from the unlicensed transmission on frequencies and equipment which require a license.
Land Mobile Radios (LMR) require an FCC license to operate. Let us do the work.Icom Programming Software GuideThe guide below outlines which Icom programming software is needed for each radio model, and the associated programming cable to use.