
IM10-OS3AH
Revision History
88
Revision
Date
ECO
Description
Jan 01
589
• Change to the OS-3A 118-159.4MHz Analog Board.
R31 was 100R is now 49R9
• Changes to the OST-3A128 Analog Board.
C35 was 5.6pF is now 3.3pF and R40 was 330R is now 220R.
Feb 01
• Corrected the confusion with D6 & D7 on the OS-3A 118-159.4MHz
Analog Board parts list.
634
• Changes to the OS-3A 118-159.4MHz Analog Board.
C26 was 1nF is now 3.3pF.
635
• Changes to the OS-3 128 – 174MHz Analog Board.
C56 was 330pF is now R42 (Select).
C56 was 330pF is now R42 (Select).
Apr 01
619
• Changes to the OST-3H4xx Analog Board.
C37 – C39 were 1.0µF are now 1.5µF
C45 was 220nF is now 68nF.
C49 was 22nF now 15nF,
C60 was 100nF now a zero ohm wire jumper.
R19 was 10K0 is now zero ohm jumper (Both OS(R/T)-3H4xx).
R32 was 5K6 is now 6K2 and R36 was 2K2 is now 1K2.
May 01
637
• Changes to the OS(R/T)-3A 118-159.4MHz Analog Board.
U10 was Select, now VC145193F.
R29 was Select, now 3K92.
Aug 01
658
• Changes to the OS(R/T)-3/xx 128-174MHz Analog Board.
TCXO was Saronix, now Rakon.
4A
Oct 01
652
• New design of OS(R/T)-3H 128-174MHz Analog Board.
PCB was 50025-02, now 50025-04 (version –04.)
Added “Appendix” section 6 to provide Layout, Schematic and Parts
List of new board, along with an explanation of the board changes.
List of new board, along with an explanation of the board changes.
Mar 02
679
• VHF Analog PCB R19 value changed to 221K to prevent excessive
frequency error with modulation.
R19 was 1150-4A2212FP, 22K1 SM 805
now 1150-5A2213FP, 221K, SM 805
4B
Aug 02
713
• New design of OS(R/T)-3H 406-470MHz Analog Board.
PCB was 50028-02, now 50025-05 (version –05.)
Added “Appendix” section 7 to provide Layout, Schematic and Parts
List of new board, along with an explanation of the board changes.
List of new board, along with an explanation of the board changes.
Oct 02
n/a
• VHF Analog Board (pg 6-4): Corrected label for JU1 – remove
reference to 9.6MHz.
4C
Nov 02
729
• New design of OS(R/T)-3H 29-71.4MHz Analog Board.
Added “Appendix” section 8 to provide Layout, Schematic and Parts
List of new board, along with an explanation of the board changes.
PCB was 50038-02, now 50038-03 (version –03.)
New board uses a Rakon TCXO and U10 is selectable with
MC145191F, MC145192F or MC145193F.
5-0-0
Aug 03
n/a
• Converted to new manual format. Seperated models into discrete
manual sections. Included appendixes into main body of manual.
Removed AM Enhanced Synthesizer as it is now part of a product
specifi c manual and is no longer required in this modual manual.
699
• Changes applied to Low Band only-Unfi ltered audio is coupling with
the low level signal close to the output of the audio processor (not
included in this manual).
R10 and R12 were 1150-4A1002FP, 10K0 SM 0805
Now 1150-4A2212FP, 22K1 0805
759
• New Digital PCB to allow for new Microprocessor
PCB was 4309-26500213, PCB 50021 Rev 3
Now 4309-26002104, PCB 50021 Rev 4
Added R42 10150-3A1001FP, 1K00 0805
5-0-1
Aug 03
n/a
• Corrected header and footer to match sections. Corrected VHF
band reference in manual locator section.
Содержание OSR-3H061
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