4: Philips FM92E Background:
Remote Head for FM92E
This is a general information section on the Philips transceiver model FM-92 before we commence to convert its
operation from commercial VHF low band (70-85 MHz) to 6 metres HAM band
There are several versions of the FM-92, for high Band VHF and UHF, this page primarily covers the 99 channel
low Band VHF, 25 watt output ( E band, 66-88 Mhz model)
The FM-92 is part of the Philips FM-900 series, there are also FM-91 and FM-93 models. It comes in E, A, T, U,
W1 & W2 band versions.
This transceiver is EPROM programmable, normally a 2764 (8kbyte) EPROM.
The FM92 is characterised as a mobile base unit, it comes into two variations, a "Local" unit, with front panel
fixed to the base unit and the "Remote" unit, which has the front, control panel connected to the main unit by a
remote cable with DB-15 connectors at each end approx 25cm L, 20cm W, 6cm D, with a diecast body with heat-
sink ribbing and sides and rear panel. Connectors are a 15 pin DB-15 for remote head connection, a BNC
antenna socket and 13.8V DC power lead.
The remote Head and Local front panel, includes twin 7 segment displays for channel indication and several
buttons for UP/DOWN channel selection, SEND button, AUX button, POWER on/off button, plus Volume and
Mute controls, Power, TX & RX indication LEDS.
For those considering using a Phillips FM900 series for amateur radio, and are confused by the band
codes used, the Philips FM900 series band plan is as follows:
E Band radios are Lo Band VHF covering 68-88 MHZ: This is the one to convert to 6M
B Band radios are Hi Band VHF covering 132-153 MHZ: These are fine for 2M amateur
A Band radios are Hi Band VHF covering 148-174 MHZ
T Band radios are UHF covering 403-420 Mhz
U Band radios are UHF covering 440-470 Mhz
W1 Band radios are UHF covering 470-500 Mhz: These are the ones for UHF CB use
W2 Band radios are UHF covering 500-520 Mhz
5: Basic Specifications:
• Mode - FM only
• Channels - 99, simplex and/or duplex
• Power output - 1 Watt to 25 Watts
• Power supply - 13.8VDC, (-ve) ground
• Power consumption - 6.5A with Transmitter at 25W
• Scanning - 2 groups of 10 channels
• Channel frequencies, simplex/duplex, scan groups and power levels programmable by EEPROM
• Economiser mode for low power consumption
• IF – 20.4 MHz. Earlier versions 10.7 MHz.
Philips FM92E Conversion to 6 Meters: Version 3.9 Page 6
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