eeprom

EEPROM Considerations

    The Delta, Phoenix and Rangr series of radios are programmed to contain the transmit / receive frequencies of operation. This programming is stored in the 2212 EEPROM (Electrically Erasable Programmable Read Only Memory). The eeprom stores not only the respective frequencies, but other parameters like the squelch tail, the per channel CTCSS value and the Carrier Control Timer (CCT) value. The CCT ensures that a radio with a stuck PTT switch does not tie up a repeater channel for a length of time, blocking others' use of the channel. It also serves to protect the radio's final amplifier transistors from overheating and possible damage.

    In converting a radio, you'll need to have an eeprom programmed to at least one working channel. If not, the radio won't transmit.

    If the radio does receive and satisfactorily transmit into a dummy load, take note of the maximum transmit time before the radio stops transmitting and returns a tone over the speaker. If this time limit is too restrictive to your planned method of operating, then the eeprom will need to be reprogrammed.

G.E.and the product names Phoenix, Delta, Rangr are trademarks of Ericsson General Electric Mobile Communications.

DISCLAIMER - - If you follow the steps outlined herein, you do so at your own risk. I cannot, nor will not, be responsible for any possible damage to radio equipment, personal property, to yourself or to others caused by modifications that you may make to the radio as a result of your reading this.

The M/P controls TRANSMITTING and receiving on many frequencies, suitable for a wide range of HF, VHF and UHF needs. In the USA, TRANSMIT operation requires a license issued by the FCC for the class of operation intended. Amateur radio licensees must maintain strict control over their equipment, preventing unlicensed operation within or outside of the amateur bands.