Table of Contents
Specifications ..................................................................................... 1
Introduction ........................................................................................ 2
Functional Description ....................................................................... 3
Trunking Operation ........................................................................... 4
Installation .......................................................................................... 5
Jumper Selection ................................................................................ 5
Radio Connections ............................................................................. 6
Alignment ........................................................................................... 8
RF Alignment ..................................................................................... 8
Repeater Alignment ........................................................................... 9
CTCSS Table .................................................................................... 10
Figure 1 RF Test Points ................................................................... 11
Crystals ............................................................................................. 11
Figure 2 VR-100 Parts Locator ........................................................ 12
Parts List ........................................................................................... 13
Schematic ......................................................................... Fold Out
VR-100
Specifications
General:
Operation: Motorola PAC/RT® compatible plus trunking.
Modes: Priority, non-priority disabled, test mode.
Indicators: 8 high brightness LEDs, handheld queueing tones.
Interface: 9 pin "D" connector with 6 ft. cable.
Adjustments: Receive sensitivity, transmit dev., squelch threshold,
local mic sens., lock tone decode frequency, lock
tone dev., local speaker audio.
Jumpers: COR polarity, on-air polarity, enable/disable polarity,
Tx audio flat/de-emph., Rx audio flat/pre-emph.
CTCSS: DIP switch selectable, 37 EIA tones + 69.3 & 97.4
Power Requirements:
DC supply: 13.6 VDC ±25% negative ground.
Standby: 80 mA.
Receive: 250 mA.
Transmit: 1.5 A.
Physical:
Dimensions: 5.275"W x 6"L x 1.12"H.
Weight: 18 oz.
Case: One piece extruded aluminium.
Transmitter:
Frequency Range: 450-470 MHz
RF Power: 0.25-2W adjustable
Tx Spurious: -50dbc
Stability: 5ppm
FM Noise: -55db
Audio dist: <5%
Tx sens: 50mV-2.5V RMS
Lock Tone: Jumper selectable: 832.5 or 847.5Hz
FCC TA: LRUVR-100U Parts 22, 90
Receiver:
Frequency Range: 450-470 MHz
Sensitivity: .4μV for 12db Sinad
Mod Acceptance: ±7.5kHz
Selectivity: 70db
Spurious/image rej.: 60db
IMD response: 65db
Stability: 5ppm
Lock Tone detect: Tunable: 820 Hz to 930 Hz, 1% bandwidth
Local Rx Audio: 400mW into 8 Ohms
Specifications Subject to Change without notification
VR-100
Page 1
Introduction
The Pyramid Communications model VR-100 is a microprocessor
controlled low power vehicular repeater. It is designed to interface
between a high power mobile radio and a low power UHF handheld. If
the radio operator is out of the vehicle and the mobile radio is receiving
a transmission, the VR-100 will repeat the signal to the users handheld.
The user may also transmit back to the VR-100 via the handheld, and their
transmission will be repeated back to the base by the high power mobile
radio, effectively extending the range of the low power handheld.
On-board logic control by the microprocessor ensures that only one
vehicle will become active as the repeater, should several vehicles arrive
at the same scene. The logic also handles cases where the priority vehicle
leaves the scene (or fails), or another priority vehicle arrives from a
different site.
The model VR-100 is fully compatible with Motorola PAC/RT®
systems, as well as GE Ericsson and Standard EX-10/ CTS-20 radios.
Additionally, the VR-100 supports connection to LTR® or Motorola
trunking radios, local mic audio repeat (local PTT from the mobile is
repeated to the HT's), and local speaker audio for HT-Base transmissions.
Designed to interface to a wide variety of mobile radios, the VR-100
has input and output adjustments for Rx audio sensitivity, mobile Tx
deviation, COR polarity and threshold, local mic sensitivity, local speaker
audio, on-air detect polarity, enable/disable polarity and audio response
selections for flat or 6db/octave for both Tx and Rx audio paths. There
are also jumper selections for lock tone frequency, priority sample rate,
conventional/trunking operation and a built in test mode.
The eight LED front panel status indicators confirm proper CPU
operation, priority status, and mobile/repeater COR and PTT status.
VR-100
Page 2
Functional Description
The VR-100 operates on UHF simplex frequencies; the handhelds
transmit CTCSS but are carrier squelch receive. The VR-100 has CTCSS
on receive only. The repeater should be connected to a VHF high band
or low band mobile for best operation. Connection to a UHF mobile is
possible, provided there is enough separation in the mobile transmit and
the VR-100 receive frequencies. Also, antennas for the VR-100 and the
mobile radio should be located as far apart as practical, and with vertical
separation if possible. Additionally, bandpass filters and notch cavities
may be used to reduce interference between the mobile and VR-100.
When the user leaves the vehicle, they activate the VR-100 via their
mobile radio front panel or a separate switch. When the mobile radio is
receiving carrier and proper tone, the VR-100 will begin transmitting on
the handheld's receive frequency. The user is able to hear and respond to
all radio traffic, including other handhelds at the site. The VR-100 will
cease transmission periodically to check for handheld activity. If the VR-
100 detects proper carrier and tone from a handheld, it will key the mobile
radio and repeat the users transmission. In this way, the handheld is given
priority and may respond during repeater hang time. The VR-100 has a
3 minute time-out timer in the base to handheld direction. If the base
transmits to the mobile for more than 3 minutes, the VR-100 will send an
error tone to the handheld, unkey the repeater and remain idle until the
base ceases transmissions.
When the VR-100 is first activated, it will transmit a short "lock tone"
that alerts the user that the system is functioning. It will then assume the
priority status and be ready to repeat any base to handheld or handheld to
base transmissions. If another unit arrives at the same site and is
activated, it too will transmit the "lock tone"; when the first VR-100
detects the lock tone from the second unit, it will increment it's priority
counter and will no longer repeat any transmissions. This process will
continue for each unit that arrives at the scene, creating a priority
hierarchy for up to 256 vehicles.
Even though the other VR-100's are not at priority status, they will
continue to monitor the channel for activity. If the priority unit were to
leave the scene or become disabled, the other units will detect the
condition to repeat and determine that there is no priority unit repeating
the transmission. They will then begin decrementing their priority
counters until one of them reaches the priority status and begins repeating
VR-100
Page 3
the transmission. Since the VR-100's are all at different priority counts,
only one will reach priority status and begin transmitting. The other units
will sense the priority repeater and cease decrementing their counters,
preserving the priority hierarchy.
If another unit were to arrive from a different scene and it is still
the active priority, there will be two active repeaters on the air when a
condition to repeat exists. When one of the VR-100's unkeys to check
for handheld activity, it will detect the presence of the other active
VR-100 and increment it's priority counter and cease transmission.
This is the self clearing mode to prevent radio "collisions".
If the user were to key the mobile radio locally and his VR-100 is
the priority, the VR-100 will detect the local mic PTT and repeat the
transmission to the other handhelds at the site so that they would not
miss half of the transmission.
If the users wish to communicate HT-HT without accessing the
mobile repeater, they may transmit on the same frequency without
CTCSS encode. The repeater will only respond to carrier and tone from
the handhelds.
Trunking Operation
When the model VR-100 is connected to a trunking radio and the
user wishes to access the system from the handheld, they key their
handheld briefly then release. The VR-100 will key the mobile radio
for 200mS, during which time it monitors the mobile's transmitter for
an on-air condition. If it does not see the radio transmit at all (system
is busy), it will retry every 5 seconds until successful or time out (30
Sec). It will also send a "busy" tone to the handheld every 5 seconds to
indicate the progress of the call attempt. If unsuccessful after 30
seconds, the VR-100 will transmit an error tone to alert the user that the
call attempt failed.
When the VR-100 detects that the mobile is transmitting, it will
continue to monitor the on-air line until the transmitter remains
keyed for at least 250 mS to ensure that the radio is not merely
handshaking or retrying. After successful acquisition of a voice
channel, it will continue to hold the mobile PTT active for 2 seconds
and transmit a go-ahead blip to the handheld user. The user then
keys their handheld to speak on the voice channel. If the user does
not key up within the 2 second period, the VR-100 will unkey the
mobile and send the error tone as before.
VR-100
Page 4
Installation
Before installing the VR-100, ensure that the RF and repeater
sections are properly aligned per the tuning procedure beginning on page
8 of this manual. Additionally, ensure that the VR-100 jumpers are
properly configured for use with the particular mobile radio that it will be
connected to:
JP1 Controls the polarity of the remote enable/disable feature of the
VR-100. If the remote enable line (pin 3 of P1) goes low to
activate the repeater, set JP1 to the (-) position. If pin 3 goes high,
set JP1 to the (+) position. If pin 3 is not used and you wish to
have the repeater active at all times set JP1 to the (-) position and
ground pin 3.
JP2 Controls the polarity of the mobile COR line. Before setting this
jumper, COR threshold adjustment (RV5) should be made as
described in the alignment section of this manual on page 9. If
the mobile COR line goes more positive in the presence of
carrier, set JP2 to the (+) position or to the (-) position if the line
goes more negative during carrier.
JP3 Controls the polarity of the on-air detect line (pin 9 of P1). This
line is only used in trunking applications. If the transmitter
sense line goes more positive during transmit, set JP3 to the (+)
position, otherwise set JP3 to the (-) position. If using a trunking
radio, ensure that JP6 is also shorted.
JP4 Controls the audio response of the mobile transmit signal. If
pin 2 of P1 is connected to the mobile transmitter audio path
before pre-emphasis, JP4 should be set to de-emph. in order to
correct for the pre-emphasized audio coming from the handheld.
If pin 2 is connected after pre-emphasis, set JP4 to flat.
JP5 Controls the VR-100 lock tone encode frequency. If JP5 is open
(default) the lock tone frequency is 832.5 Hz. If JP5 is shorted,
the lock tone frequency is 847.5.
JP6 If the VR-100 is connected to a conventional radio, leave JP6
open. If connected to a trunking radio, short JP6. If JP6 is
shorted, ensure that pin 9 of P1 is connected to a point in the radio
that indicates the radio is transmitting and ensure that JP3 is
configured properly.
VR-100
Page 5
JP7 During base to handheld transmissions, the VR-100 will
periodically unkey the repeater to check for handheld activity.
JP7 enables the priority sampling. If open, the VR-100 will not
priority sample. If JP7 is shorted, the VR-100 will sample at 1
second intervals.
JP8 Used only for testing and alignment of the VR-100. If shorted,
the VR-100 transmitter is active and the lock tone is sent
continuously. For normal operation, ensure that JP8 is open.
JP9 Controls the audio response of the repeater transmit signal. If
pin 6 of P1 is connected to the mobile's discriminator or a point
in the receiver before de-emphasis, JP9 should be set to flat. If
pin 6 is connected after de-emphasis, set JP9 to pre-emph. in
order to correct the audio for the handheld receiver.
Make the connections between the mobile radio and the VR-100
cable as follows:
Pin 1: Ground. Connect the the radio's chassis or ground plane.
Pin 2: Mobile transmit audio. Connect to the mobile transmit audio
path or tone input. If connected before pre-emphasis, ensure that
JP4 is set to de-emph. If connected after pre-emphasis, set JP4
to flat.
Pin 3: Remote enable/disable. Connect to the radios auxiliary output
or a separate switch to remotely enable or disable the repeater.
If this line goes high to activate the repeater, ensure that JP1 is
set to the (+) position. If this line goes to ground, set JP1 to the
(-) position. If not used ground pin 3 and set JP1 to the (-)
position; the repeater will be active any time there is 12 VDC at
pin 5.
Note: This line does not have a pull up resistor; if connected to
an open collector or dry contact output, add a 10K resistor
between pin 3 and pin 5 of P1 on the VR-100 main PCB.
Pin 4: Mobile PTT output. Connect to mic PTT on the mobile radio,
or a line that goes active low to transmit. This line is also used
to sense local mic PTT in order to repeat the local mic audio to
the handhelds.
Note: To disable local mic repeat, remove D4.
Pin 5: 12 VDC input. Connect to the radio's switched 12V supply.
(Blue)
(Black/Shield)
(Green)
(Red)
(White)
VR-100
Page 6
Pin 6: Mobile receiver audio. Connect this line to the mobile receive
audio path before the volume control. If pin 6 is connected before
de-emphasis ensure that JP9 is set to flat. If pin 6 is connected
after de-emphasis, set JP9 to pre-emph.
Pin 7: Mobile COR detect. This line is used to indicate when the
VR-100 should repeat the transmission to the handheld. Connect
to a logic point in the mobile that indicates proper tone and
carrier have been detected or the audio unmute line. If this line
goes more positive during an unmute condition, set JP2 to the (+)
position. If pin 7 goes more negative during unmute, set JP2 to
the (-) position. RV5 should also be set for the midway voltage
between mute and unmute. Example: If connected to a logic line
that goes between 0 and 5 VDC, set RV5 (pin 12 of U3) for 2.5
V. If pin 7 goes between 5.6 and 7.2 VDC, set RV5 for 6.4 VDC.
Pin 8: Local mic audio. When the user keys the mobile radio and the
VR-100 connected to it is the priority unit, the local mic audio
can be repeated to the handhelds. Connect this line to a point in
the mobile transmitter audio path after pre-emphasis but before
limiting or filtering. RV6 sets the sensitivity level.
Note: To disable local mic repeat, remove D4.
Pin 9: On-air detect. Used only in trunking applications to indicate
when the mobile transmitter is actually on the air. This is not the
same as mobile PTT. Connect radio PTT on the logic board or
to switched transmitter B+. If pin 9 goes positive during
transmit, set JP3 to the (+) position. If pin 9 goes to ground
during transmit, set JP3 to the (-) position.
Install the VR-100 in the vehicle using the supplied mounting
bracket and hardware. The bracket is secured to the housing using four
8-32 x ¼" machine screws. Do not use screws longer than ¼" for
mounting the VR-100 to the bracket or circuit damage may result.
(Brown)
(Violet)
(Yellow)
(Grey)
VR-100
Page 7
Alignment
In order to properly align the VR-100, you will need two service
monitors and the mobile radio that the repeater will be installed with.
Refer to figures 1 and 2 for alignment points.
Dis-assemble the repeater by removing the two allen-head screws on
the rear panel, the phillips screw on the bottom and sliding the main
circuit board out of the housing with the rear panel attached. Connect one
service monitor to the VR-100 BNC jack and the other to the mobile
antenna jack; connect the cable from the mobile radio to the VR-100.
Turn on the mobile and active the VR-100. Adjust the squelch control on
the RF board (R115) so that the repeater COR LED on the front panel is
off.
RF Alignment
Important: The case of the VR-100 is integral to the heat sink for the RF
module and voltage regulators. Do not transmit at full power for extended
periods of time with the PCB removed from the case or damage may result!
1. Short jumper JP8 on the VR-100 main PCB. With a DC voltmeter
at TP01 on the RF board, adjust L203 and L204 for a maximum
reading.
2. Move the voltmeter to TP02 on the RF board; adjust L203, L204,
L205 and L206 for a maximum reading.
3. Move the voltmeter to TP03 on the RF board; adjust L205, L206,
L207 and L208 for a maximum reading.
4. Move the voltmeter to TP04 on the RF board; adjust R232 to midway.
Adjust C244 and C247 for a minimum reading at TP04. Adjust R232
for 2 Watts. Adjust C205 for the transmit frequency ±100 Hz.
Remove the short from JP8 on the VR-100 main PCB.
5. Set the service monitor connected to the VR-100 to generate the
repeater receive frequency with a 1kHz tone at ±3kHz deviation.
Connect a Sinadder to TP 1 on the VR-100 main PCB. Adjust the
signal generator output level for a reading of 12db Sinad.
6. Adjust L112, L113, C147, C151, L101, C104 and L104 in that order
for a maximum Sinad reading at TP 1. Re-adjust the signal generator
output level as necessary to maintain a usable reading.
7. Adjust C136 on the RF board for a maximum Sinad reading.
VR-100
Page 8
Repeater Alignment
1. Set the mobile service monitor to generate mode and RF output for
1mV with a 1 kHz tone at ±3kHz deviation on the mobile receive
frequency. Set the VR-100 service monitor to the transmit monitor
mode.
2. Mobile COR Threshold: With a positive voltmeter probe at pin
13 of U3 (VR-100), measure and record the voltage when the mobile
signal generator is both on and off. Move the voltmeter probe to pin
12 of U3 and adjust RV5 for the midway point of the 2 measurements
taken at pin 13. Set JP2 to the (+) position if the voltage at pin 13 went
more positive when the signal generator was on, otherwise, set JP2
to the (-) position.
3. Repeater modulation limiting: Open JP7. Set RV1 on the
VR-100 main PCB fully clockwise. Turn the mobile signal generator
on and confirm that the VR-100 is keyed and the mobile COR and
Rptr PTT LEDs are on. Adjust R205 on the RF board for ±4.5kHz as
read on the service monitor connected to the VR-100. Adjust RV1
on the VR-100 main circuit board for ±3kHz deviation. Confirm that
when the mobile signal generator deviation is reduced to ±2kHz and
±1kHz, the VR-100 deviation tracks with it. Increase the mobile
signal generator deviation to ±5kHz and confirm that the VR-100
deviation does not exceed ±4.5kHz. Set JP7 per the installation
section, page 6.
4. Lock Tone Deviation: Turn off the mobile signal generator and
short JP8 on the VR-100 main circuit board. Adjust RV3 for ±3kHz
deviation as read on the service monitor connected to the VR-100.
Remove the short from jumper JP8.
5. Local Mic Repeat Level: Set the service monitor connected to the
mobile to the monitor mode; key the mobile radio, inject a 1kHz tone
into the mic audio circuit and adjust the audio level to produce ±3kHz
deviation. Confirm that the VR-100 is also transmitting and adjust
RV6 on the main PCB for ±3kHz deviation as read on the service
monitor connected to the VR-100. Unkey the mobile radio.
6. Receive Audio Level: Set the service monitor connected to the
VR-100 to the generate mode and inject an RF signal at 1mV with a
1kHz tone at ±3kHz deviation. Connect a scope probe to TP1 on the
main PCB. Adjust R122 on the RF PCB for 1VPP as read at TP1.
VR-100
Page 9
7. Lock tone decode frequency: Move the scope probe to TP2 and
change the service monitor modulation frequency to 832.5 Hz.
Adjust RV4 for a maximum reading at TP2. Confirm that the PRI
LED is off on the front panel. Return the modulation frequency to
1kHz.
8. Mobile transmit audio level: Set the 6 position DIP switch for the
system CTCSS frequency as determined in table 1. Turn on the
service monitor CTCSS modulation at ±750 Hz deviation. Confirm
that the Rptr CTCSS and Mobile PTT LEDs are on, and the mobile
is keyed. Adjust RV2 on the VR-100 main PCB for ±3kHz deviation
as read on the service monitor connected to the mobile.
9. Repeater Squelch level: Turn off the CTCSS deviation and reduce
the signal output to .25uV. Adjust R115 on the RF board so that the
Rptr COR LED is just off. Confirm that the LED comes on when the
signal generator level is increased to .4uV.
10. Local speaker level: Increase the signal generator output level to
1mV. Connect an 8 Ohm speaker to J1 of the VR-100 and adjust RV7
on the main PCB for the desired receive audio level.
Tone 123456
67.0 000000
69.3 000110
71.9 100000
74.4 000001
77.0 110000
79.7 000010
82.5 100001
85.4 000011
88.5 110001
91.5 000100
94.8 100010
97.4 000101
100.0 110010
103.5 100011
107.2 110011
110.9 100100
114.8 110100
118.8 100101
123.0 110101
127.3 100110
Table 1
Note: '0' means off
Tone 123456
131.8 110110
136.5 100111
141.3 110111
146.2 101000
151.4 111000
156.7 101001
162.2 111001
167.9 101010
173.8 111010
179.9 101011
186.2 111011
192.8 101100
203.5 111100
210.7 101101
218.1 111101
225.7 101110
233.6 111110
241.8 101111
250.3 111111
No Tone 001111
VR-100
Page 10
Figure 1
RF Test Points
Crystals
The model VR-100 uses a Standard Communications Corp. CU33
telemetry module for the RF section. Crystals are available from:
Frequency Management Co.
15302 Bolsa Chica Street
Huntington Beach CA 90649
(800) 800-9825
The crystal frequencies can be determined from the following
equations:
XtalRX=(FR-21.4)/9 XtalTX=FT/36
VR-100
Page 11
Parts List
Reference Description Part #
C1,C32,C34 .068μfd Polyester Cap 1040-683
C2,C21 1μfd 16V Electrolytic Cap 1032-105
C3-C6, C33 100ufd 16V Electrolytic Cap 1032-107
C7 10μfd 16V Electrolytic Cap 1032-106
C8-C13,C22,C26-C31, C35,C37,C38 .1μfd Polyester Cap 1040-104
C14 2.2μfd Tantalum Cap 1031-225
C15,C16 33pfd Ceramic Cap 1010-330
C17,C23,C24 .0068μfd Polyester Cap 1040-682
C18 .001μfd Polyester Cap 1040-102
C19,C36 .0033μfd Polyester Cap 1040-332
C20 .0022μfd Polyester Cap 1040-222
C25 4.7μfd 16V Electrolytic Cap 1032-475
D1,D4,D5,D6 1N914 Pin diode 5001-001
D2,D3 Right angle LED x4 6001-401
F1 3A Pica fuse 7300-030
JP1-JP4, JP9 .100" Vertical Header 7220-103
J1 3.5mm Speaker Jack 7210-350
P1 DB-9 M Right Angle PCB 7400-011
P2 14 pin dip socket 7401-014
Q1, Q3-Q10 2N4401 NPN TO92 3104-401
Q2 TIP32 PNP TO220 3200-032
RV1-RV3,RV5-RV7 10K Right Angle Pot 2101-103
RV4 50K 10 Turn Pot 2110-503
R1,R4,R40 100K 1/8 Watt Carbon Film 2008-104
R2,R3 560K 1/8 Watt Carbon Film 2008-564
R10,R17,R21,R23,R24,R34,R46,R59,R60 5.6K 1/8 Watt Carbon Film 2008-562
R7,R8,R16,R18-R20,R57,R58 22K 1/8 Watt Carbon Film 2008-223
R36,R37,R38,R41 27K 1/8 Watt Carbon Film 2008-273
R6,R44 33K 1/8 Watt Carbon Film 2008-333
R9 220 1/8 Watt Carbon Film 2008-102
R11,R12,R56 4.7K 1/8 Watt Carbon Film 2008-472
R5,R13,R28,R29,R39 2.2K 1/8 Watt Carbon Film 2008-222
R14,R15,R42,R43,R45 10K 1/8 Watt Carbon Film 2008-103
R22,R27,R35 1.0M 1/8 Watt Carbon Film 2008-105
R25,R26,R61 470K 1/8 Watt Carbon Film 2008-474
R30-R33 18K 1/8 Watt Carbon Film 2008-183
S1 6 Position DIP Switch 7410-006
U1,U2,U3 MC 3403 Quad Op-Amp 4003-403
U4 8749H Microprocessor 4008-749
U5 MX-365 CTCSS Processor 4000-365
U6 4066 Quad analog switch 4004-066
U7 5V 1A Regulator 4007-805
U8 9V 2A Regulator 4017-809
U9 LM 386 400mW Audio Amp 4000-386
U10 DS 1233 Reset Controller 4001-233
VAR1 18V MOV 4900-018
X1 1.0 MHz xtal HC49U 8001-000
Extruded Aluminium case 7201-001
Aluminium Endplate 7201-010
Acrylic Front panel 7201-011
BNC Chassis Mt. Connector 7400-010
Ribbon Cable with 14 Pin IDC Conns. 7301-002
6 Ft. Radio Cable with DB-9 F Conn. 7301-001
Shorting Blocks for JP1-JP4, JP9 7400-009
VR-100
Page 13
4
4
3
3
2
2
1
1
D D
C C
B B
A A
VCC
VCC
VCC
VCC
9VDCVCC
VCC
VCC
9VDC
9VDC
9VDC
12VDC
VCC VDD VSS VEE GND
VCC
Bias
Bias Bias Bias
Bias
Bias
9VDC
VCC
VCC
Bias
Bias
12VDC
Size
Scale
CAGE Code DWG NO Rev
Sheet of
B
Pyramid Communications
Monday, January 07, 2008 11
C
VR-100 Vehicular Repeater
Size
Scale
CAGE Code DWG NO Rev
Sheet of
B
Pyramid Communications
Monday, January 07, 2008 11
C
VR-100 Vehicular Repeater
Size
Scale
CAGE Code DWG NO Rev
Sheet of
B
Pyramid Communications
Monday, January 07, 2008 11
C
VR-100 Vehicular Repeater
Power
Priority
Rpt Cor
Rpt CTCSS
Rpt PTT
MCOR
MPTT
Spare
Lock
Tone
Dev
Lock Tone
Trunking
CW
CW
cwcw
Flat
De-Emp
Opt
Test Mode
Pre-Emp
Flat
cw
cw
Pica
Fuse
R47-R54
330 Ohm
cw
[-]
[+]
[-]
[+]
[-]
[+]
JP5
JP6
JP7
JP8
LTone Dec
R6
33K
R6
33K
R35
1M
R35
1M
Q1
2N4401
Q1
2N4401
R5
2k2
R5
2k2
U1D
MC3403
U1D
MC3403
12
13 14
R14 10KR14 10K R23
5k6
R23
5k6
Q2
TIP117
Q2
TIP117
R15
10K
R15
10K
R13
2k2
R13
2k2
R8
22K
R8
22K
C33
100U
C33
100U
R9
820
R9
820
U2C
MC3403
U2C
MC3403
10
98
RV5
COR Thresh
RV5
COR Thresh
U3A
MC3403
U3A
MC3403
3
21
Q6
2N4401
Q6
2N4401
JP2JP2
1
2
3
R21
5k6
R21
5k6
+
-
U9
LM386
+
-
U9
LM386
2
35
6
1
4
8
7
C21
1U
C21
1U
R20 22KR20 22K
RV7
Local Spkr
RV7
Local Spkr
Q5
2N4401
Q5
2N4401
R61
470K
R61
470K
Q7
2N4401
Q7
2N4401
C31 .1uC31 .1u
U2D
MC3403
U2D
MC3403
12
13
14
C6
100U
C6
100U
R17
5k6
R17
5k6
C32
.068u
C32
.068u
R18 22KR18 22K
R16
22K
R16
22K
C34
.068u
C34
.068u
RV3
LTone Dev
RV3
LTone Dev
Q8
2N4401
Q8
2N4401
R55
8R_1W
R55
8R_1W
X1
1.0 MHz
X1
1.0 MHz
D4
1N914
D4
1N914
U6A
4066
U6A
4066
1 2
13
R56 4k7R56 4k7
U2B
MC3403
U2B
MC3403
5
6
7
RV6
Local Mic
RV6
Local Mic
C15
33p
C15
33p
JP4JP4
1
2
3
P2P2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
U1A
MC3403
U1A
MC3403
3
21
C12
.1u
C12
.1u
+
-
U3D
MC_3403
+
-
U3D
MC_3403
12
13 14
411
R1
100K
R1
100K
R27
1M
R27
1M
U4
8749
U4
8749
X1
2
X2
3
RESET
4SS
5T0
1T1
39 INT
6
P1.0
27 P1.1
28 P1.2
29 P1.3
30 P1.4
31 P1.5
32 P1.6
33 P1.7
34
EA
7
PROG 25
DB.0 12
DB.1 13
DB.2 14
DB.3 15
DB.4 16
DB.5 17
DB.6 18
DB.7 19
P2.0 21
P2.1 22
P2.2 23
P2.3 24
P2.4 35
P2.5 36
P2.6 37
P2.7 38
RD 8
WR 10
PSEN 9
ALE 11
R2
560K
R2
560K
R22
1M
R22
1M
U2A
MC3403
U2A
MC3403
3
2
1
RV1
Rptr Dev
RV1
Rptr Dev
R19
22K
R19
22K
C16 33pC16 33p
C7
10U
C7
10U
D6
1N914
D6
1N914
R3
560K
R3
560K
R32
18K
R32
18K
R33
18K
R33
18K
R31
18K
R31
18K
R4 100KR4 100K
R30
18K
R30
18K
C1 .068u
C1 .068u
C19 3n3C19 3n3
RV2
Mob Dev
RV2
Mob Dev
S1S1
1
2
3
4
5
6
12
11
10
9
8
7
C17 6n8C17 6n8
U6D
4066
U6D
4066
1110
12
C18
1n
C18
1n
C10
.1u
C10
.1u
C27 .1uC27 .1u
C20
2n2
C20
2n2
JP3JP3
1
2
3
U3B
MC3403
U3B
MC3403
5
6
7
R26
470K
R26
470K
C5
100U
C5
100U
R25 470KR25 470K
U10
DS1233
U10
DS1233
I
2O1
3
R57
22K
R57
22K
D1
1N914
D1
1N914
JP9JP9
1
2
3
C11
.1u
C11
.1u
C26
.1u
C26
.1u
R60
5k6
R60
5k6
C36
3n3
C36
3n3
R59
5k6
R59
5k6
C35
.1u
C35
.1u
R58
22K
R58
22K
Q4
2N4401
Q4
2N4401
C28
.1u
C28
.1u
U1C
MC3403
U1C
MC3403
10
98
Q3 2N4401Q3 2N4401
C29C29
C37
.1u
C37
.1u
JP1JP1
1
2
3
C30C30
C38 .1uC38 .1u
Q10
2N4401
Q10
2N4401
R46
5k6
R46
5k6
R7
22K
R7
22K
VAR1
18V
VAR1
18V
C4
100U
C4
100U
J1
3mm_Jack
J1
3mm_Jack
P1
DB9_M
P1
DB9_M
5
9
4
8
3
7
2
6
1
U5
MX_365
U5
MX_365
VCC 1
XI 2
XO 3
LE
4
D5
5
D4
6
D3
7
D2
8
D1
9
D0
10
VSS
11
REF
12
DEC
13
COMP
14
RX
15
TONE 16
R/T 17
PTL 18
RXO 19
TXO 20
VB 21
TXI 22
RXI 23
IN 24
R11
4k7
R11
4k7
U1B
MC3403
U1B
MC3403
5
6
7
C8
.1u
C8
.1u
U7
LM7805
U7
LM7805
IN
15V 3
R24
5k6
R24
5k6
C13 .1u
C13 .1u
C25
4U7
C25
4U7
C9
.1u
C9
.1u
TP1TP1
TP2TP2
R12 4k7R12 4k7
R28
2k2
R28
2k2
R41
27K
R41
27K
R29
2k2
R29
2k2
R39
2k2
R39
2k2
R34
5k6
R34
5k6
Q9
2N4401
Q9
2N4401
R37
27K
R37
27K
U6C
4066
U6C
4066
8 9
6
R38
27K
R38
27K
F1
3A
F1
3A
U6B
4066
U6B
4066
43
5
R40 100KR40 100K
Rv4
50K 10Turn
Rv4
50K 10Turn
R42
10K
R42
10K
R43
10K
R43
10K
R44 33KR44 33K
R36 27KR36 27K
U3C
MC3403
U3C
MC3403
10
9
8
C3
100U
C3
100U
U8
LM7809
U8
LM7809
IN
19V 3
R45
10K
R45
10K
R10
5k6
R10
5k6
D5
1N914
D5
1N914
C22
.1u
C22
.1u
C2
1U
C2
1U
C14
2U2
C14
2U2
C23
6n8
C23
6n8
C24
6n8
C24
6n8
/
