Codan Radio Communications VT-3-150-SN User Manual
Transmitter Main Board Instruction Manual
7-1
7
REVISION HISTORY
ISSUE
DATE
REVISION
1
August 97
First Issue.
Sept. 97
Included PCB version 1.4 Component Layout and Schematic diagrams.
2
Dec 97
Main PCB version now 1.7 (ECO 515).
• BCD Switches changed from Surface Mount Part to Through Hole Part.
• Audio Amplifier was removed because this option was never used.
• Added Timer Out Timer circuitry to Main Tx Board.
• TOT PCB no longer installed on Audio Processor.
For
A21-TX3-00
• BCD Switches changed from Surface Mount Part to Through Hole Part.
• Audio Amplifier was removed because this option was never used.
• Added Timer Out Timer circuitry to Main Tx Board.
• TOT PCB no longer installed on Audio Processor.
For
A21-TX3-00
TX MAIN/FP, MT-3, STANDARD
A21-TX3-30
TX MAIN/FP, MT-3, + REF. INPUT
TUBING, TFE-260C,14AWG T/W,CLR 7610-260C14TW
18mm Long and Consummable Buss Wire 16 Awg 40mm Long
NOW NOT INSTALLED
18mm Long and Consummable Buss Wire 16 Awg 40mm Long
NOW NOT INSTALLED
Dec 97
For
A21-TX3-01 TX MAIN/FP, MT-3, WITH FUSE
A21-TX3-02 TX MAIN/FP, MT-3, + DC RELAY
A21-TX3-03 TX MAIN/FP, MT-3, + FUSE,RELAY
• Removed Jumpers J1, J5, J8, J10, J11.
• Added Jumpers J22 - J29, J31 - J35.
• Added Test Points TP28 - TP34
A21-TX3-01 TX MAIN/FP, MT-3, WITH FUSE
A21-TX3-02 TX MAIN/FP, MT-3, + DC RELAY
A21-TX3-03 TX MAIN/FP, MT-3, + FUSE,RELAY
• Removed Jumpers J1, J5, J8, J10, J11.
• Added Jumpers J22 - J29, J31 - J35.
• Added Test Points TP28 - TP34
Dec 97
Front Panel Board version now 1.2 (ECO 521).
Modified MT-3 Tx Front Panel Board (FPB) to support all options on the
New Transmitter Main Board . Also, the Front Panel Board is now easier to
configure if new microphones (other than Daniels microphones) are used.
The new FPB can be used on the old TX-3 main - all options will function.
However, the old version of FPB will NOT work with the new version TX-3
Main PCB (unless you hard wire one of the microphone pins into the main
PCB (13.8V line.)
Added J2 SM Jumper. This jumper now selects Rx Audio or 13.8V to Pin
4 of the Microphone. This capability used to be selected by a jumper on the
Main Tx Board. For Normal Opertion J2 'x' position must be installed
Options - This is for future use (not used now). Added 2x4 header land
pattern to Tx Front Panel Board. A 2x4 header can be installed to make
other microphones compatible with Daniels Transmitters.
Modified MT-3 Tx Front Panel Board (FPB) to support all options on the
New Transmitter Main Board . Also, the Front Panel Board is now easier to
configure if new microphones (other than Daniels microphones) are used.
The new FPB can be used on the old TX-3 main - all options will function.
However, the old version of FPB will NOT work with the new version TX-3
Main PCB (unless you hard wire one of the microphone pins into the main
PCB (13.8V line.)
Added J2 SM Jumper. This jumper now selects Rx Audio or 13.8V to Pin
4 of the Microphone. This capability used to be selected by a jumper on the
Main Tx Board. For Normal Opertion J2 'x' position must be installed
Options - This is for future use (not used now). Added 2x4 header land
pattern to Tx Front Panel Board. A 2x4 header can be installed to make
other microphones compatible with Daniels Transmitters.
3
Nov 98
MT-3 FM Audio Processor now version 1.8
The MT-3 FM Audio Processor was re-designed because the IC, SL62070,
VOGAD, SO-8 is no longer available from the supplier. Also, the new
design improves the flat and 300Hz Pre-emphasis audio responses.
Included PCB version 1.8 Component Layout, Schematic diagram, Parts List
and Section 2.4, 3.9 and 3.10.
The MT-3 FM Audio Processor was re-designed because the IC, SL62070,
VOGAD, SO-8 is no longer available from the supplier. Also, the new
design improves the flat and 300Hz Pre-emphasis audio responses.
Included PCB version 1.8 Component Layout, Schematic diagram, Parts List
and Section 2.4, 3.9 and 3.10.