Barrett 2061 User manual

BARRETT 2061
Operating and technical
manual
HF PHONE PATCH
BCM20601/7
© Barrett Communications
Head office:
Barrett Communications Pty Ltd
47 Discovery Drive, Bibra Lake WA 6163 AUSTRALIA
Tel: [phone] Fax: [phone]
Email:
www.barrettcommunications.com.au
[email protected]

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
1
Specifications
Output level to phone line Nominally –0 dBm
Input level from phone line Nominally –0 dBm
Frequency response 300 to 3000 Hz ± 2 dB
Output impedance to phone line 600 ?
VOX sensitivity Adjustable internally
VOX hang time 0.5 seconds
Ultimate hybrid balance -50 dB measured with a single tone
Transceiver interface
Rx audio input Balanced 600 ? @ 0 dBm
Tx audio output Balanced 600 ? @ 0 dBm
Frequency response 300 to 3200 Hz ± 2 dB
VOX key output Open collector
Switching speed 5 mS
General
Telephone line connector RJ-11C
Local telephone set connections RJ-11C
Connector to transceiver DB-25
Indicators "CONNECT”, “OPERATOR OVERRIDE”
Front panel controls "CONNECT”, “DISCONNECT”, “OPERATOR OVERRIDE”
Rear panel control Monitor volume control
Input power +11 to +15 VDC (12VDC nominal)
Input current 80mA @ +12.6 V input
Size 185mm W x 270mm D x 70mm H
(2000 series standard enclosure)
Weight 0.8kg
Environmental
Operating temperature -20°C to +55°C
Storage temperature -40°C to +85°C
Humidity Up to 95% @ 55°C
Shock MIL-STD-810D, method 516.3 procedure VI
Vibration MIL-STD-810D, method 514.3 Category

2
Overview
The Barrett 2061 HF telephone interface (phone patch) provides an interface between an HF network and
the international telephone network, allowing HF stations to be connected to telephone subscribers and
vice versa.
The HF network user provides the base station operator with the telephone number required. The operator
dials the number on the telephone connected to the 2061 interface unit. When the telephone subscriber
answers, the station operator switches the 2061 to "CONNECT". The automatic VOX is activated and the
call between the HF network station and the telephone subscriber proceeds automatically, the transmitter
being keyed by the telephone subscriber's voice. During the call the station operator can speak to both
parties by using the “OPERATOR OVERRIDE” switch. At the completion of the call the station operator
switches the 2061 to "DISCONNECT".
The Barrett 2061 uses a unique adaptive hybrid to convert the four-wire audio from the transceiver to two-
wire audio for the phone line. An adaptable hybrid, implemented with digital signal processing (DSP),
provides continually recalculated isolation between the off air HF signal and the telephone user, producing
a reliable VOX signal (Voice Operated Xmit (transmit)) to key the transmitter when the telephone
subscriber's voice i,s present.
The 2061 is packaged in a 2000 series enclosure and is designed for direct interface via our standard bus
cable to the Barrett 2050 transceiver. It can however be interfaced to other suitable HF transceivers.
Features
DSP based automatic adaptive hybrid that balances the telephone line continually with no adjustments,
eliminating oscillation in full duplex circuits, false VOX tripping and time consuming setup.
Designed for full-duplex, half-duplex, or simplex operation.
Compact desk-top package.
Built-in speaker with volume control to monitor call progress
Connection to Barrett 2020 power supply and 2050 transceiver
BARRETT 2061 OPERATING AND TECHNICAL MANUAL
To antenna
Spare auxilliary
connector
To telephone
To telephone line To mains power

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
3
Operation
Front panel controls and indicators
Operator override switch
This switch operates the key relay in the 2061 to cause a connected transmitter to transmit. The transmitter
is keyed automatically by the VOX and the operator override LED is turned on when the switch is pressed
upward.
Connect switch
This switch controls the connection of the 2061 to the telephone and audio circuits. When the switch is in
DISCONNECT position, the telephone line is disconnected from the unit and patched through to the
telephone hand set, and the audio in/outs are disconnected. Thus the 2061 is effectively out of the circuit.
When in the CONNECT position, the phone line and the audio are connected to the 2061 and the connect
LED will light. The unit then starts its adaptation cycle of the phone line. When the adaptation cycle is
complete, the unit is ready for operation.
HF PHONE PATCH
CONNECT OPERATOR
OVERRIDE
BARRETT 2061

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
4
Rear panel controls and indicators
“Transceiver” connector
This is the connector for the interface between a radio system and the 2061. It contains transmit and
receive audio and keylines.
“Line” connector
This RJ11C provides the telephone line connection. When the unit is in CONNECT mode, the telephone
line is switched to the 2061 phone patch circuitry. When the unit is in DISCONNECT mode, the 2061 is
bypassed and the telephone line is routed to the PHONE connector.
“Phone” connector
This RJ11C jack allows the connection of a telephone set (telephone) to 2061. The telephone is connected
to the telephone line when the 2061 is in the “DISCONNECT” mode. When the unit is switched to
“CONNECT”, this jack is disconnected from both the line and the unit until the Operator Override Switch is
used.
“Vox Adjust”
This is a screw type pot which allows the VOX sensitivity to be adjusted. See Secton “Transmitter keying
(VOX)”
Line Adjust
This is a screw type pot allowing the transceiver audio to line level to be set. This should be set at a level
where there is sufficient receive audio at the phone users end.
“Monitor Volume”
This control adjusts the monitor speaker volume in the 2061.
PHONE TRANSCEIVER
MONITOR
VOLUME
LINE
BARRETT PHONE PATCH
2061
MADE IN AUSTRALIA
N14
LINE
ADJUST
TRANSMIT
ADJUST

2050 HF Transceiver
2022 Power Supply
912 Broadband Antenna
BARRETT 2022
MAINS
BATTERY
POWER SUPPLY
1abc def
jkl mno
tuv wxyz
Channel
Mode Scan
Clear
0Tune
Mute
Menu
ALE
Selcall
!
Enter
Send
Channel
Channel
Volume
Volume
23
456
789
ghi
RxTune Clarifier
pqrs
Program
Beacon
BARRETT 2050
2050 HF Transceiver
2022 Power Supply
912 Broadband Antenna
BARRETT
2022
MAINS
BATTERY
POWER SUPPLY
1abc def
jkl mno
tuv wxyz
Channel
Mode Scan
Clear
0Tune
Mute
Menu
ALE
Selcall
!
Enter
Send
Channel
Channel
Volume
Volume
23
456
789
ghi
RxTune Clarifier
pqrs
Program
Beacon
BARRETT
2050
BARRETT 2061 OPERATING AND TECHNICAL MANUAL
5
Operation examples
Telephone subscriber connecting to an HF network station via the HF base station equipped with a
2061 telephone patch
The 2061 telephone patch is in the “DISCONNECT” mode and the operator at the base station is speaking
to the telephone subscriber wishing to be connected to the distant HF station.
The base station operator call the distant HF station using Selcall orALE
When contact is established between the base station operator and the distant HF station, the operator
informs the two parties that he is about to connect the two and selects “CONNECT” on the 2061
The 2061 automatically adapts itself to the phone line and the link is established between the HF station
and the telephone subscriber. The transmitter is keyed automatically by 2061 which derives the VOX signal
from the telephone subscribers voice using DSP.
Progress of the call may be monitored via speaker on the 2061 and when communications is complete, the
operator switches the 2061 to DISCONNECT. The link is disconnected.
The HF network station is to be connected to a telephone subscriber on the international telephone
network via the HF base station equipped with a 2061 telephone patch
The HF station on the network contacts the HF base station and tells the operator the number of the
telephone subscriber that he wants to be connected to.
With the 2061 telephone patch is in the “DISCONNECT” mode the base station operator dials the number
on the phone connected to the 2061. Once he is talking to the telephone subscriber he informs both parties
he is about to connect and selects “CONNECT on the 2061.
The 2061 automatically adapts itself to the phone line and the link is established between the HF station
and the telephone subscriber. The transmitter is keyed automatically by 2061 which derives the VOX signal
from the telephone subscribers voice using DSP.
Progress of the call may be monitored via speaker on the 2061 and when communications is complete, the
operator switches the 2061 to DISCONNECT. The link is disconnected.
International
Telephone
Network
2061 HF Phone Patch,
2050 HF Transceiver
2022 Power Supply
912 Broadband Antenna
BARRETT 2022
MAINS
BATTERY
POWER SUPPLY
BARRETT
2061
CONNECT
1abc def
jkl mno
tuv wxyz
Channel
Mode Scan
Clear
0Tune
Mute
Menu
ALE
Selcall
!
Enter
Send
Channel
Channel
Volume
Volume
23
456
789
ghi
RxTune Clarifier
pqrs
Program
Beacon
BARRETT
2050
HF PHONE PATCH
DISCONNECT
OPERATOR
OVERRIDE
HF Link
to multiple
stations
(3000+km)
2050 HF Transceiver
2022 Power Supply
912 Broadband Antenna
BARRETT
2022
MAINS
BATTERY
POWER SUPPLY
1abc def
jkl mno
tuv wxyz
Channel
Mode Scan
Clear
0Tune
Mute
Menu
ALE
Selcall
!
Enter
Send
Channel
Channel
Volume
Volume
23
456
789
ghi
RxTune Clarifier
pqrs
Program
Beacon
BARRETT 2050

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
6
Transmitter keying (VOX)
For a normal link, the VOX in the 2061 is set up to key the transmitter. The VOX responds to signals on the
telephone line and operates the keying circuits when voice is present. Once the VOX has tripped, it stays
active for a short time following the loss of audio to prevent dropout on pauses between syllables. This
delay is called VOX hang time.
The VOX in the 2061 is generated within the DSP and is extremely sensitive and reliable.
Adjusting VOX sensitivity
Where non-standard or poor quality telephone lines are used for connection to the 2061, adjustment of the
VOX sensitivity may be necessary. This is achieved by adjusting the “VOX Sensitivity” pot rear of the unit
using a small Philips head screwdriver. If the VOX sensitivity is too low (transmitter does not key reliably on
voice), rotate the pot clockwise. If the VOX sensitivity is too high (transmitter keys on noise other than
spoken words), rotate the pot anti-clockwise
Technical description
The basic blocks of the 2061 include a phone line interface, a transceiver interface, a hybrid,
microprocessor and speaker amplifier. The connect switch and operator override and their corresponding
LED's are to be found on the front panel and are connected to the main PCB via a loom connector (P7).
The phone line interface involves a line connect relay (RL1) which diverts the phone audio to either the
hybrid, when the unit is connected, or to the handset. A second relay (RL2) has the function of placing both
the handset and the hybrid on line during operator override, where the operator talks to both parties. A
gyrator (Q4, Q5 etc) is situated between the line connect relay and the hybrid and is used for looping the
line thereby informing the exchange that the line has been seized in the “CONNECT” mode.
The hybrid (U5) interfaces the phone line to the transceiver and has the primary function of canceling the
reflected transceiver line audio. The hybrid is connected to the line via a simple resistor network and audio
transformer. The transmit audio input and received line audio output connect the hybrid to the transceiver
via a filter and various balancing/unbalancing audio amplifiers (U1, U2, U3). Adaption to the line is initiated
by a microprocessor and takes around one second. During this time the transceiver line audio is muted via
a FET (Q2). The algorithm is continuously adaptive, always trying to null the transmitted audio reflected by
the line. A trimpot (POT1) is required to set the transceiver audio to the hybrid so that it is at an acceptable
level for a caller. The second trimpot (POT2) sets the hybrid audio to transceiver and is also very important
for setting the VOX level. Although setup in the factory this can be later adjusted after installation to cater
for various line conditions.
The received line audio is converted to balanced audio for interfacing to the transceiver. One of these
balanced outputs is passed through a precision rectifier (U3) and converted to DC for processing by a PIC
microprocessor (U8). Thus the VOX state including the hang time can be determined and transceivers
PTT line activated accordingly. Other functions of this microprocessor are to read the state of the switches,
drive the state LED's, activate the relays and to initiate the hybrid balance sequence.
The speaker amplifier (U9) provides the operator with a mixed signal of radio operator and caller audio.
Volume control is provided by a potentiometer mounted on the back (P6). To prevent acoustic feedback a
muting switch (Q6) is automatically activated when the operator bypass is enable.

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
7
Pin Name Description of function Level
1 Ground Ground 0V
2
3
4
5
6
7
8
9 PTT Out PTT output Active low 0V
10
11 Bal. Tx Balanced Tx audio output (with pin 24) 600 ? - Audio
Out 24dBm to
0dBm
12 Bal. Rx Balanced Rx audio input (with pin 25) 600 ? -
Audio Input 6dBm to
+9dBm
13 Ground Ground 0V
14
15
16
17
18
19
20
21
22
23 +13.8 VDC Input +13.8VDC input (+11VDC to +15VDC) 13.8VDC
24 Bal. Tx Balanced Tx audio output (with pin 11) 600 ? -
Audio Output 24dBm to
0dBm
25 Bal. Rx Audio Balanced Rx audio input (with pin 12) 600 ? -6dBm
Input to +9dBm
Connecting other HF transceivers to the 2061
Other HF transceivers can be connected to the 2061 telephone patch via the “TRANSCEIVER “
connector on the rear panel. Details of the signals available on this connector are shown on the table
below:-
“TRANSCEIVER” connector (25 pin female "D" connector on rear panel)

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
8
Parts Lists
2061P01-A3-Parts List
Designator Description Part Number
C1 Cap 10n 100V CP-00032
C2 Cap 10n 100V CP-00032
C3 Cap 10n 100V CP-00032
C4 Cap 10n 100V CP-00032
C5 Cap 100nF 5% 50V CP-11666
C6 Cap 100nF 5% 50V CP-11666
C7 Cap 100nF 5% 50V CP-11666
C8 Cap 100nF 5% 50V CP-11666
C9 Cap 100nF 5% 50V CP-11666
C10 Cap 100nF 5% 50V CP-11666
C11 Cap 100nF 5% 50V CP-11666
C12 Cap 100nF 5% 50V CP-11666
C13 Cap 100nF 5% 50V CP-11666
C14 Cap 100nF 5% 50V CP-11666
C15 Cap 100nF 5% 50V CP-11666
C16 Cap 100nF 5% 50V CP-11666
C17 Cap 100nF 5% 50V CP-11666
C18 Cap 4n7 5% 50V CP-11698
C19 Cap 4n7 5% 50V CP-11698
C20 Cap 47uF 16v 10% CP-11665
C21 Cap 47uF 16v 10% CP-11665
C22 Cap 47uF 16v 10% CP-11665
C23 Cap 47uF 16v 10% CP-11665
C24 Cap 10nF 5% 50V CP-11667
C25 Cap 1uF 5% 16V CP-11674
C26 Cap 1uF 5% 16V CP-11674
C27 Cap 1uF 5% 16V CP-11674
C28 Cap 100uF 20% Electro CP-11705
C29 Cap 100uF 20% Electro CP-11705
C30 Cap 10uF Tant 16v CP-01580
C31 Cap 10uF Tant 16v CP-01580
C32 Cap 10uF Tant 16v CP-01580
C33 Cap 10uF Tant 16v CP-01580
C34 Cap 15pF 5% 50V 0603 CP-11687
C35 Cap 15pF 5% 50V 0603 CP-11687
C36 Cap 2u2 Tant 20V CP-01620
C37 Cap 2u2 Tant 20V CP-01620
C38 Cap 2u2 Tant 20V CP-01620
C39 Cap 220nF 5% 50V CP-11690
C40 Cap 470uF 20% Electro CP-11719
C41 Cap 470uF 20% Electro CP-11719
C42 Cap 1nF 5% 50V NPO CP-11668
C43 Cap 100nF 5% 50V CP-11666

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
9
Parts Lists
2061P01-A3-Parts List
Designator Description Part Number
C44 Cap 10uF Tant 16v CP-01580
C45 Cap 10uF 16v Y5V CP-11710
C46 Cap 10uF Tant 16v CP-01580
C47 Cap 1nF 5% 50V NPO CP-11668
CP1 Cap Net 1nF 50V NPO 5% CP-11703
D1 Di ZHCS400 DI-03356
D2 Di ZHCS400 DI-03356
D3 Di BAV99 DI-03317
D4 Di BAV70 DI-03316
D5 Led Red SMD 0805 LE-02920
D6 Led Red SMD 0805 LE-02920
D7 Led Red SMD 0805 LE-02920
D8 Led Red SMD 0805 LE-02920
D9 Led Red SMD 0805 LE-02920
D10 Led Red SMD 0805 LE-02920
D11 Led Red SMD 0805 LE-02920
D12 Led Red SMD 0805 LE-02920
D13 Di BAV70 DI-03316
D14 Di GF1A DI-03354
D15 Di GF1A DI-03354
D16 Di GF1A DI-03354
D17 Di GF1A DI-03354
D18 Di BZX84C16 Zener DI-03367
L1 Ind 10uH 1210 IN-03600
L2 Ind 10uH 1210 IN-03600
L5 Ind 10uH 3DF TOKO IN-15007
L6 Ind 10uH 3DF TOKO IN-15007
L7 Ind 10uH 3DF TOKO IN-15007
MOV1 Varistor V120ZA1 VA-02530
P1 Conn RJ12 F 6W6C RA PCB CN-24163
P2 Conn RJ12 F 6W6C RA PCB CN-24163
P3 Conn DB25 F RA CN-04132
P4 Plug 6 pin Polarised CN-14106
P7 Header 10W Box CN-04138
Q1 Trans 2N7002 LT-1 TR-02282
Q2 Trans 2N7002 LT-1 TR-02282
Q3 Trans 2N7002 LT-1 TR-02282
Q4 Trans BC847 SOT23 TR-02262
Q5 Trans BCP56-10 SOT223 TR-02236
Q6 Trans 2N7002 LT-1 TR-02282
R1 Res 270R 0.063W 5% RE-10362
R2 Res 47k 0.063W 5% RE-10326
R3 Res 47k 0.063W 5% RE-10326

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
10
Parts Lists
2061P01-A3-Parts List
Designator Description Part Number
R4 Res 33k 0.063W 5% RE-10318
R5 Res 180R 5% 0.063W RE-10358
R6 Res 39k 0.063W 5% RE-10322
R7 Res 39k 0.063W 5% RE-10322
R8 Res 39k 0.063W 5% RE-10322
R9 Res 22k 0.063W 5% RE-10311
R10 Res 22k 0.063W 5% RE-10311
R11 Res 100k 5% 0.063W RE-10291
R12 Res 10k 5% 0.063W RE-10277
R13 Res 10k 5% 0.063W RE-10277
R14 Res 10k 5% 0.063W RE-10277
R15 Res 10k 5% 0.063W RE-10277
R16 Res 10k 5% 0.063W RE-10277
R17 Res 10k 5% 0.063W RE-10277
R18 Res 10k 5% 0.063W RE-10277
R19 Res 10k 5% 0.063W RE-10277
R20 Res 10k 5% 0.063W RE-10277
R21 Res 10k 5% 0.063W RE-10277
R22 Res 10k 5% 0.063W RE-10277
R23 Res 10k 5% 0.063W RE-10277
R24 Res 10k 5% 0.063W RE-10277
R25 Res 10k 5% 0.063W RE-10277
R26 Res 10k 5% 0.063W RE-10277
R27 Res 30k 0.063W 5% RE-10315
R28 Res 6k8 0.063W 5% RE-10332
R29 Res 6k8 0.063W 5% RE-10332
R30 Res 680R 0.063W 5% RE-10329
R31 Res 3k3 0.063W 5% RE-10323
R32 Res 220R 5% 0.063W RE-10279
R33 Res 220R 5% 0.063W RE-10279
R34 Res 220R 5% 0.063W RE-10279
R35 Res 220R 5% 0.063W RE-10279
R36 Res 220R 5% 0.063W RE-10279
R37 Res 220R 5% 0.063W RE-10279
R38 Res 220R 5% 0.063W RE-10279
R39 Res 220R 5% 0.063W RE-10279
R40 Res 220R 5% 0.063W RE-10279
R41 Res 220R 5% 0.063W RE-10279
R42 Res 220R 5% 0.063W RE-10279
R43 Res 100R 5% 0.063W RE-10283
R44 Res 10R 5% 0.063W RE-10278
R45 Res 1R 0.063W 5% RE-10310

BARRETT 2061 OPERATING AND TECHNICAL MANUAL
11
Parts Lists
2061P01-A3-Parts List
Designator Description Part Number
R46 Res 68k 0.063W 5% RE-10330
R48 Res 10R 5% 0.063W RE-10278
R49 Res 82k 0.063W 5% RE-10344
R50 Res 82k 0.063W 5% RE-10344
R51 Res 330R 5% 1W 1218 RE-00238
R52 Res 3k3 0.063W 5% RE-10323
RL1 Relay EA2-12 NEC RL-05013
RL2 Relay EA2-12 NEC RL-05013
RP1 Res Array 10k 5% 50v RE-10303
T1 Transformer Midcom TF-05129
U1 IC OP279GS IC-20056
U2 IC OP279GS IC-20056
U3 IC OP279GS IC-20056
U4 IC OP279GS IC-20056
U5 Hybrid PO-07417
U6 IC LT1616ES6 IC-20008
U7 IC LM2660M IC-20026
U8 IC PIC18F452 TQFP44 IC-20012
U9 IC TDA1905 DIP16 IC-20034
U10 IC ULN2003AD IC-02717
VR1 Pot 10k Log RE-02805
X1 Crystal 10Mhz QC49/S CR-07652
2061P02-A1-Front Panel PCB Parts List
Designator Description Part Number
P1 Header 10W Box CN-04138
D1 Led Green 5x2 rectangle LE-02909
D2 Led Green 5x2 rectangle LE-02909

Barrett 2061 Phone Patch Schematics and PCB Overlays
BARRETT 2061 OPERATING AND TECHNICAL MANUAL
Barrett 2061 Phone Patch
Main PCB Schematic
Drawing No: 2061D01-A3
1 2 3 4
A
B
C
D
4
321
D
C
B
A
1
2
3
4
5
6
P1
6PIN C1
10N/100V
C210N/100V
MOV1
RES2
C3
10N/100V
L1
10uH
L2
10uH
C4
10N/100V
R1
270R
48
1
3
2
U1A
OP279
C5
0U1
+5V
-5V
C6
0U1
POT1
100K
R2
47K
5
6
7
U1B
OP279
R3
47K
C7
0U1
TP1
DO_0 15
DO_1 16
DO_2 17
DO_3 18
DO_4 19
DO_5 20
DO_6 21
DO_7 22
DI_0 7
DI_1 8
DI_2 9
DI_3 10
DI_4 11
DI_5 12
DI_6 13
DI_7 14
GND
27
GND
28
AGND
29
AGND
30
-VEE
23
+VCC 24 +VCC 25 +VCC 26
SOUT0+
1
SOUT0-
2
SIN0
3
SOUT1+
4
SOUT1-
5
SIN1
6
U5
HYBRID
-5V
+5V
R4
33K
R5
180R
RXAUD
TXAUD
AGC
DROP
RINGDET
DUCKING
TONEGEN
PRESENCE
CALL
AUTOANS
RING
OH
TXLEV0
TXLEV1
TXLEV2
RXLEV1
RXLEV2
RXLEV3
LINE AMPLIFIER
C18
4N7
R6
39K
R9
22K
C19
4N7
R12
10K
R13
10K
C8
0U1
-5V
+5V
C9
0U1
POT2
100K
48
1
3
2
U2A
OP279
R10
22K
TP2
C20
47U
POWER SUPPLIES
VIN
5
SHDN
4
GND
2
FB
3
SW 6
BOOST 1
U6
LT1616
L5 10UH
C24
10N
R27
30K
R14
10K
C25
1U
C26
1U
L6
10UH
+5V+13V8
D1
ZHCS400
D2
ZHCS400
C28
100U
C29
100U
C27
1U
C30
10U
5
6
7
U2B
OP279
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
P3
CON25
BAL_AUD_OUT2
BAL_AUD_OUT1
BAL_AUD_IN2
BAL_AUD_IN1
AUX_PTT
CP1
1N
48
1
3
2
U3A
OP279
5
6
7
U3B
OP279
-5V
C21
47U
C22
47U
FC
1CAP+ 2
GND
3
CAP- 4
VOUT 5 LV
6
VIN
8
OSC
7
U7
LM2660
L7
10UH
+5V
C31
10U
C32
10U
-5V
+5V
R7
39K
R8
39K
R28
6K8
R29
6K8
48
1
3
2
U4A
OP279
C10
0U1
C11
0U1
R30
680R
RL1
EA2-12
1
2
3
4
5
6
P2
6PIN
X1
10MHz
C34
15P
C35
15P
+5V +5V
R31
3K3
VPP
C12
0U1
C13
0U1
+5V
C14
0U1
RB6/PGC 16
OSC1/CLKIN 30
RB5/PGM 15
RB4 14
RB7/PGD 17
RB3/CCP2 11
RB2/INT2 10
RB1/INT1 9
RB0/INT0 8
VSS
6
VSS
29
VDD 7
OSC2/CLKOUT/RA6 31
RC0/T1OSO/T1CKI 32
RC2/CCP1 36
RC1/T1OSI/CCP2 35
RC3/SCK/SCL 37
RC4/SDI/SDA 42
MCLR/VPP
18
RA0/AN0
19 RA1/AN1
20 RA2/AN2
21 RA3/AN3/VREF
22 RA4/TOCKI
23 RA5/SS/AN4
24
RE0/AN5
25 RE1/AN6
26 RE2/AN7
27
VDD 28
RC7/RX/DT 1
RC6/TX/CK 44
RC5/SDO 43
RD0/PSP0
38 RD1/PSP1
39 RD2/PSP2
40 RD3/PSP3
41 RD4/PSP4
2RD5/PSP5
3RD6/PSP6
4RD7/PSP7
5
U8
PIC18F452
BAL_AUD_IN1
BAL_AUD_IN2
D3
BAV99
R15
10K
R16
10K
Precision half wave rectifier
1
2
3
4
5
6
P4
CON6
+5V VPP
R17
10K
R18
10K
+5V+5V
+13V8
Q1
2N7002
D4
BAV70A
+13V8
AGC
DROP
RINGDET
DUCKING
TONEGEN
PRESENCE
CALL
AUTOANS
BAL_AUD_OUT1
R19
10K
R20
10K
BAL_AUD_OUT2
-5V
+5V
RING
OH
TXLEV0
TXLEV1
TXLEV2
RXLEV1
RXLEV2
RXLEV3
R32 220R
R33 220R
R34 220R
R35 220R
R36 220R
R37 220R
R38 220R
R39 220R
D5
D6
D7
D8
D9
D10
D11
D12
Q2
2N7002
LINEINMUTE
LINEINMUTE
C36
2U2
C37
2U2
R21
10K
R43
100R
C23
47U
R45
1R
C39
220N
C40
470U/25V
+13V8
C15
0U1
C38
2U2
R22
10K
5
9-16
8
4
6
7
1
3
2
U9
TDA1905
R23
10K
+5V
C41
470U/25V
+40dB AUDIO AMP
10Vpp
C33
10U
C42
1N
R24
10K
R46
68K
C16
0U1
R25
10K
R26
10K
BAL_AUD_OUT1
TXAUD VR1 10K Log
1
2
3
4
5
6
7
8
9
10
P7
CON10
1B 1
2B 2
3B 3
4B 4
5B 5
6B 6
7B 7
GND 8
1C
16
2C
15
3C
14
4C
13
COM
9
5C
12
6C
11
7C
10
U10
ULN2003
RP1
10K
+5V
+5V
R40
220R
R41
220R
C17
0U1
R42
220R
5
6
7
U4B
OPAMP2
RL2
EA2-12
+13V8
Q3
2N7002
D13
BAV70A
GYRATOR
D14
GF1A
D15
GF1A
D16
GF1A
D17
GF1A
D18
BZX84C16
Q4
BC847
Q5
BCP56
R48
10R
R49
82K
R50
82K
C44
10U
C45
10U
Q6
2N7002
SPKRMUTE
SPKRMUTE
C43
0U1
R51
330R/1W
C46
10U
R44
10R
R52
3K3
SP1
VOX SENSITIVE
R11
100K
C47 1N
SPKR
FID1
FIDICIAL MARK
FID2
FIDICIAL MARK
T1
671-8221

Barrett 2061 Phone Patch
PCB Overlay showing values
Drawing No: 2061P01-A3
BARRETT 2061 OPERATING AND TECHNICAL MANUAL
Barrett 2061 Phone Patch Schematics and PCB Overlays
Barrett 2061 Phone Patch
PCB Overlay showing designators
Drawing No: 2061P01-A3

Barrett 2061 Phone Patch
Front Panel Schematic
Drawing No: 2061D02-A1
BARRETT 2061 OPERATING AND TECHNICAL MANUAL
Barrett 2061 Phone Patch Schematics and PCB Overlays
Barrett 2061 Phone Patch
Front panel PCB showing designators
Drawing No: 2061P02-A1
Barrett 2061 Phone Patch
Front panel PCB showing values
Drawing No: 2061P02-A1
1
2
3
4
5
6
7
8
9
10
P1
CON10
+5V
D1
GREEN
D2
GREEN
+5V +5V
1
2
P4
CON2
1
2
P5
CON2
FID1
FIDICIAL MARK
FID2
FIDICIAL MARK
CONNECT
OVERRIDE
LED-CONNECT
LED-OVERRIDE
SW1
SWITCH-SPST
SW2
SWITCH-SPST
SPKR