One of my favourite EX-PMR radios is the Simoco SRM 9000 range, easy to convert and great if you want to use it as a “hideaway” radio in the modern car.
I own quite a few of them and use three of them in my car for 4M, 2M and 70cms. These radios are available for several bands but of course we are only interested in the ones that we can use on Amateur Radio Bands, 66-88 MHz(E0),136-174 MHz(AC),400-450 MHz(TK),400-480 MHZ(TU) and 430-500 Mhz(UW-L), in this case I will be talking about the 4m Band 66-88 Mhz (E0), but the programming and setup is exactly the same for each band.
The radio body itself is a Simoco SRM9000 and the Microphone I use is the SRM9020 one which gives a few extra buttons which I have programmed up to do the most common tasks needed, for example: High and Low Power and Squelch adjustments, Scan and a Calling/Favourite Channel buttons. The On/Off button is on the top of the microphone and the volume is on the right hand side. The display on the microphone is a backlit 6 digit display so with the 4m frequencies I have left in the decimal point, this works well on frequencies like “70.400”, “70.475” etc. but “70.2625” will show up as “70.262” and “70.4875” will show as “70.487”, I think this is a good compromise as the only digit missing will always be the “5” and this will only be on the “in-between” channels.
To program the radios you will have to get the appropriate lead, these can be found on eBay for about £10 or so and of course the software. I will be making the software available on this blog later with all instructions and Channels set up as a downloadable file so that all you have to do is simply download software and file and simply connect to your computer and program your radio.
|Picking the radio and band.|
You will see a few screen shots of the software screen in action. I have the whole 4m band already programmed in 70.000 to 70.500 in 12.5 KHz steps and power output is 25 Watts High and 5 watts Low. The SRM can only scan a batch of 15 Channels at a time so I have programmed in the most popular 15 Channels, also several more “batches” of 15 channels can be programmed in to cover a various Pick and Mix to suit, these “Scan Bands” can be named i.e.: Scan1, Scan2 etc. or whatever you like and when the radio is in Scan mode the Scan band required can be changed by the Channel up and down buttons.
The Memory/Call channel button I have programmed to my local net frequency which is 70.400, this puts the radio on a handy “near” middle of the band, to access channels that are not in the “SCAN” batch all I have to do is press the Channel Up/Down buttons to get to where I want to transmit. The Squelch Level can be adjusted up and down with these same buttons, or turned down and off completely if I want to hear a very weak signal.
As you see I have three of the radios in the boot of my car, these radios have 2 leads each running to the front of the car one for the microphone and one for the speaker, the microphone lead is simply a CAT5 cable with a CAT5 Joiner used to extend the microphone. I am lucky in that the battery for my car is under the back seat so the DC leads are very short. I only use 2 Mag Mount antennas for the radios, one antenna is a 4M with a centre loaded coil and the other antenna is a Dual-Band antenna, you will see the Duplexer in between the 2M and 70cms radios.Having the radios in the boot means that they are out of sight of prying eyes and the microphones are unplugged and locked in the glove box when not in use, the antennas are also stored in the boot when I am not using the radios.
|Three Radios in back of boot.|
|Socket and Lead for 4M.|
|Sockets and Speakers.|
The three microphones sitting in their clips look well on the dash,and with the three radios on scan I will not miss much while mobile....
|Showing off with three microphones on dash.|
I will go into more detail on the programming of these radios and any problems that you may find at a later stage and will also have the Operator’s Manual, Software and instructions available to download then.