Key Radio KP80 / KP150 / KP450 (KG109) Programming Information

Key Radio Programming Information
KP80 / KP150 / KP450 (KG109)

by Tom Grady G6IGA keyradioatsuperiorsignals.co.uk copyright 1998-2022

All registered trademarks are acknowledged

Key KP150 Handheld Radio

Checking which type of option board you have in your set

Key PMR Option Board

When removing the back plate check which type of PCB you have fitted. You will need to have a PMR board (with a 27c64 Eprom) to carry out the modifications listed below, these instructions DO NOT apply to a trunked board (with 27128 Eprom)

Configuring Audio Links

If a CTCSS or 5-tone board has been removed from the radio either the Flexi brown shorting board will be fitted. If not solder links 4 & 5 together.

If you don't have the square speaker / mic audio shorting cap which fits on the left hand side speaker / mic socket and have no audio from the set as a result. You need to remove the rear of the set and the PMR option board, underneath the main board needs pins 5 & 6 linked. Some sets have a pair of pads for this purpose, otherwise just solder link the two together.

Pins are numbered thus
1
2
3
4
5
6
7
8
9
upto 15

Pins 8 & 9 are the squelch. Open circuit is open squelch. Short Circuit is closed squelch. Select on test resistance of approx 5K across pins 8 & 9 will adjust squelch to the correct value.

Programming is similar to the KM series with a few minor differences shown below

A number of parameters need to be worked out;

The Reference frequency of 6MHz is sampled and divided by the 'Reference Division Rate' to determine the channel spacings.

Reference Division Rate - 6MHz/10KHz = 600 = 852 in reversed Hex as used by the Key (see TX(R) & RX(R) in the table below).

Reference Division Rate - 6MHz/12.5KHz=480 = 0E1 in reversed Hex as used by the Key (see TX(R) & RX(R) in the table below).

Each Address code ALWAYS starts with F i.e. F* F* F* so that for the reference division rate for 12.5KHz 0E1 works out to be F0 FE F1.

Fr = Receive Frequency

Ft = Transmit Frequency

D = Prescaler Division Rate fixed at 64

N = Number of Complete Divisions

A = Remainder of the channel division rate

'N' & 'A' are calculated using the following equation; X = (N x D) + A, works out to the following in the example below
11602 = (0.181 x 64) + 0.018

A TX frequency of 145.025MHz = 145.025/12.5 = 11602 then divided by D (fixed at 64)

11602/64 = 181.28125 Number of complete divisions = N = 181 converted into Hex and reversed = 5B0 (see TX(N) in the table below).

0.181x64 = 11.584-11.602 = 0.018 = A = Remainder of the channel division rate

18 converted into Hex and reversed = 21 (see TX(A) in the table below).

Receive is similar BUT 21.6MHz has to be taken off the RX frequency

On a KP80 (KG109) Low Band Handportable you ADD 21.6 to the RX frequency

A RX frequency of 145.625MHz = 145.625-21.6/12.5 = 9.922/64 = 0.15503125

0.155 Number of complete divisions = N = 155 converted into Hex then reversed B90 (see RX(N) in the table below).

0.155x64 = 9.92-9.922 = 0.002 = A = Remainder of the channel division rate

2 converted into Hex and reversed = 20 (see RX(A) in the table below).

Upto 99 channels can be programmed from memory location 000 to 620

Key 27c64 Eprom Coding
Channel #1 Address	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
	RX(A)		RX(N)			RX(R)			TX(A)		TX(N)			TX(R)
Channel Data - example 145.025 Tx 145.625 Rx	F2	F0	FB	F9	F0	F0	FE	F1	F2	F1	F5	FB	F0	F0	FE	F1
Channel Data - example 70.4500 Tx 70.4500 Rx	F4	F0	F3	F7	F0	F0	FE	F1	F4	F0	F8	F5	F0	F0	FE	F1

Programming Additional Features

After the frequencies have been programmed there are some additional features to be added in the programming

At Memory location 640 the Transmit Time Limter is set

Transmit Time Limiter Coding
Time (Seconds)	20	35	50	65	80	95	110	125	140	155	170	185	215	215	230	No TTL
Data at Address 640	F0	F1	F2	F3	F4	F5	F6	F7	F8	F9	FA	FB	FC	FD	FE	FF

Some early models of the KP150 (KG109) were fitted with the uPD7530BGF KM753C-111 CPU if this is the case '00' MUST be programmed in location 650.

From address 670 to 7F8 the CTCSS tones are set for each of the 99 channels

The information below covers both the original 09QCTA CTCSS board and also the Sigtec C1124 CTCSS board.

CTCSS Data Chart
Data	RX Code		TX Code
Tone	RX Data-1	RX Data-2	TX Data-1	TX Data-2
67.0	0E	0F	0C	0F
71.9	0E	07	0C	07
74.4	0A	0F	0B	0F
77.0	0E	03	0C	03
79.7	06	0F	04	0F
82.5	0A	07	08	07
85.4	02	0F	00	0F
88.5	0A	03	08	03
91.5	0E	0E	0C	0E
94.8	06	07	04	07
97.4	0A	0E	08	0E
100.0	06	03	04	03
103.5	02	07	00	07
107.2	02	03	00	03
110.9	0E	06	0C	06
114.8	0E	02	0C	02
118.8	0A	06	08	06
123.0	0A	02	08	02
127.3	06	06	04	06
131.8	06	02	04	02
136.5	02	06	00	06
141.3	02	02	00	02
146.2	0E	05	0C	05
151.4	OE	01	0C	01
156.7	0A	05	08	05
162.2	0A	01	08	01
167.9	06	05	04	05
173.8	06	01	04	01
179.9	02	05	00	05
186.2	02	01	00	01
192.8	0E	04	0C	04
203.5	0E	00	0C	00
210.7	0A	04	08	04
218.1	0A	00	08	00
225.7	06	04	04	04
233.6	06	00	04	00
241.8	02	04	00	04
250.3	02	00	00	00
No Tone 09QCTA	02	0C	00	0C
No Tone C1124	02	0D	00	0D

The CTCSS data is entered into the eprom as follows

IMPORTANT note a code is required even for NO CTCSS with a CTCSS Board fitted

The NO CTCSS code for a 090QCTA (original CTCSS Board) or C1124 (Sigtec) differs, check which board you have

To enable the Tx Timeout Timer on the C1124 CTCSS Board, 1 needs to be added to both the CTCSS Rx & Tx Data-1 codes (see example in table below)

Key KP150 CTCSS Coding

Address

670

671

672

673

674

675

676

677

678

679

67A

67B

CH1(R)

CH1(T)

CH2(R)

CH2(T)

CH3(R)

CH3(T)

Channel 1 Data - example 67.0Hz Tx 67.0Hz Rx for either the 09QCTA CTCSS Board OR no Tx Timeout enabled on C1124 Board

Channel 1 Data - example 67.0Hz Tx 67.0Hz Rx with Tx Timeout Timer enabled on C1124 Board

Channel 2 Data - example NO CTCSS tones 09QCTA

Channel 2 Data - example NO CTCSS tones C1124

Links on Sigtec C1124 CTCSS Board

J1 - Increases decoder bandwidth for non-crystal controlled repeater panels
J2 - Tone phase change A=180 deg B=120 deg
J3 - Link with diode enables monitor button
J4 - Linked disables Tx lockout
J5 - Leave unlinked

Alignment of Radio

Supply Voltage 9.6v

Adjust TX and RX VCO trimmers for approx 3v (Range 1-5v)

Test VCO voltage at Test Point

Calibrate frequency with VCO frequency adjust trimmer

Adjust maximum power and then align High Pwr Set / Low Pwr Set if radio has switchable power levels

Tune front end coils x 4 for maximum receiver sensitivity

Squelch is preset with radios with no squelch pot

KP Handheld Mic Pinouts

Key KP Handheld Microphone Connections

This is the easy bit ... a preconfigured file to blow straight into the 2764 flexi track mounted eprom

KP80 (KG109) 4 Metres eprom binary code - 4 metres ( 16 channels - 99 Channels Possible) Channel Listing
KP80 (KG109) 4 Metres eprom binary code - 4 metres ( 40 channels - 99 Channels Possible) Channel Listing
KP150 (KG109) 2 Metres eprom binary code - 2 metres ( 88 channels - 99 Channels Possible) Channel Listing
KP450 (KG109) 70 cms eprom binary code - 70 cms ( 80 channels - 99 Channels Possible) Channel Listing

PLEASE NOTE: I am not able to supply blank flexi track mounted 27c64 eproms but can program them. I do not have any other parts for the Key KP Radio, only answer questions about KEY KP series radios ! (I'm always hunting for Key bits myself though)

Hopefully readers of this article will be familar with how to actually program a 27c64 eprom.

Key used to manufacture a special programming adaptor for the flexi track mounted 27c64 eprom which converts it to the normal 28 pin DIL socket to blow its data.

Before you ask I only have one of these adaptors and its not for sale !

Please contact epromsatsuperiorsignals.co.uk for pre-programmed devices @ GBP 11.70 UK pounds (inc GBP 1.70 UK postage) / 13.00 Euros each (inc GBP 4.25 international postage) postage (Please note as these leadless 27C128 eproms are no longer manufactured, the devices MAY be recycled ones). 6.70 GBP UK pounds (inc GBP 1.70 UK postage) / 7.50 Euros (inc GBP 4.25 international postage) each if you supply the blank 27C128 devices each.

by Tom Grady G6IGA keyradioatsuperiorsignals.co.uk copyright 1998-2022

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