Type or paste a DOI name into the text box. 10 625 in binary option on the back left of the set near the speaker socket, is a small sticker located on the PA heatsink.
This helps identify the type of radio and its suitability for use, of course it should have a serial number plate on the right hand side, saying what it is, but this is not always the case. UHF 430-470MHz – suitable for 70cms use. White only KM225 BAND3 177-207MHz trunking radio – important characteristic – no squelch pot. Not used directly for amateur conversion, but the 40 channel head, chassis, PLL Board, Mic and interface board can be transplanted onto one of the other types of set. Important the RF Board, PA, VCO and trunking signalling board cannot be used for amateur conversion. HIGH BAND 136-174MHz – suitable for 2metre use. No sticker but ‘short’ half the normal length PA – KM80 LOW BAND 70-87.
5MHz – suitable for 4metre use. As the set is modular in its construction, many combinations can be added or removed as necessary. PLEASE NOTE: I am not able to supply parts, only answer questions about KEY KM series radios ! Hopefully readers of this article will be familiar with how to actually program a 2732 eprom, the information below purely describes how to calculate the frequency information to go into the 2732. 50 Euros including 90p postage each if you supply the blank devices each. This reference frequency is sampled and divided by the ‘Reference Division Rate’ to determine the channel spacings.
Each Address code ALWAYS starts with F i. 5KHz C30 works out to be FC F3 F0. Important see circuit layout located on reverse of the top lid for location of components. 1″ pin header – CPC Order No.
CTCSS or 5-Tone board is not present on the front interfacing connector. VCO trimmer capacitors marked RX and TX, on the opposite side of the set through the covering plate. If you do not get the results expected, have you removed the two thin wires sometimes mounted on the reverse side of the board behind the eprom socket. TX frequency TCXO in top right hand corner of PLL board. By removing the small screws underneath the PA section access to the PA compartment can be made, to adjust the transmit power level between 2. It is important to correctly adjust the power protection circuit correctly, or otherwise damage to the PA can occur with a bad aerial load. Remove 2 x large screws from sides of control head, Remove 6 x silver screws from brown PCB in back of head.