Orange County, Calif.  Sheriff UHF Micor, Dual Control for extra receiver.  Used through 1989. 

Photo courtesy Ray Grimes, Orange County Sheriff's Department




Denelcor briefly manufactured custom integrated control assemblies for mobile radios in the late 1960's.  The siren amplifier and lighting control was built into the control head.  It is unknown whether any agency other than CSP purchased these. These control heads were ahead of their time, in that it would be almost another twenty years before Motorola or GE  would offer integrated siren and lighting control in a radio control head, and those brands used separate siren/PA amplifiers.  

Denelcor later manufactured a completely different-looking head for the Cleveland, Ohio Police Department, which used a pair of rotary knobs for functions and controlled a 12 channel Motran or Mocom 70 style Motorola radio drawer, as shown below. In this model the siren amplifier was a separate unit and not built inside the head as the model shown above.

Thanks to Greg Savernik of the Cleveland Police Historical Society and Museum for this photo:


Aerotron, now defunct, was a long-established North Carolina manufacturer so it appears natural that the state's highway patrol would use some of their equipment.  Several other state departments used the equipment as well.  The Mega is a synthesized radio using  bank of socketed jumper strips which program the channel information by a selection of which pin on the jumper strip is inserted into the socket.  The later Mega "E" used a uv-erasible EPROM to do the same thing.  It is unknown if NCHP used any of the "E" models.  The "E" is black in color, the previous models are a pebbly brown color as shown below.  The Megas replaced Aerotron M-PAC radios and apparently were themselves replaced by Motorola Syntor X9000's.  In highway patrol service, the Megas were often used with handsets rather than microphones.


BOSCH German Railroad Police Radio 

This Bosch radiotelephone head was used with a Telefunken Teledux 1970's 160 MHz solid state radio package by the Deutsche Bahn German railroad authority.  Interestingly, it fits neatly into a 1-DIN car radio slot as used in most newer cars.  The head contains tone decoding and signaling equipment.  There was also a separate handset and cradle.  The D-B on the head is the logo of Deutsche Bahn.   I have no idea what most of the pushbuttons do.  The display is a small red scrolling LED arrangement.  The Teledux transmitter-receiver is about the same size as a Motorola Motrac and is built to an incredibly rugged standard.   Amazingly, these radios were left in the vehicles when they were sold as surplus by Deutsche Bahn.  The numbered plug shown in the lower left quadrant is a coded key to identify the unit to a control station.  The "Q" button means "Quittung," or end.  The "W" button appears to mean "Wagen zu Wagen," or "car to car."

The Teledux mobile drawer covers a band of channels with 160 Mhz receive and 171 MHz transmit, as well as a rather extensive list of audio tone frequencies (apparently a tone decoder is built-in.)  The RF output is on the rear of the housing via a Type "N" female connector.  The gray male connector on the front of the Teledux drawer is probably the high current 12 Volt DC input.  The matching connector appears similar to those used on automotive relays.  It is believed that the transmitter runs about 10-15 Watts output power.  It is fully solid state.  The Teledux radio packages themselves were also used in the German "B Netz" mobile telephone systems, so this setup may be merely a slight modification of a B-Netz telephone.

There is some kind of interface box in the cable immediately before connection to the Teledux drawer itself.  The box contains a circuit board screened with the Deutsche Bahn logo so it is apparently proprietary to them, and that board contains a relay, two 2732 EPROM chips and a Xicor EEPROM chip.  This box possibly contains the firmware for operating the system.  The specific unit number decoding seems to be controlled by the removable code plug shown inserted into the control head.  

Does anyone have any documentation on either this Telefunken radio package or the Bosch control group?  It's impossible to find anything on it in the USA!  


BOSCH German Police Motorcycle Radio, from BMW R80RT

This is a German VHF FM police radio of the late 1970's or early 1980's, removed from a BMW R80RT police motorcycle when it was sold surplus in Germany.  It was then imported to the USA by an American enthusiast. The radio package itself is missing.  5-26-2010: Thanks to Chris Horswell in Austria, I now know that the original radio was a Bosch public safety radio type FuG 8 or FuG 9, one of the series FuG 8a, FuG 8b, FuG 8b-1, FuG 9b or FuG 9c.  The radio is about the same size as a Motorola MCX-100 motorcycle radio and operated on the 4 Meter band (80 MHz range approx.)  An interesting design where there is a control head on top of and almost flush with the fuel tank, and a headset-microphone for the rider in addition to the handset shown here, stowed inside the small door.  The antenna is a standard Kathrein Mfg. type which resembles a regular auto radio antenna.

The German Oppermann Telekom website has a photo of the radio installed on a motorcycle as well as some other photos of the Bosch FuG 8 series:







Ver. 9/11/2011                                                                                                                                                        2007 All rights reserved