PRODUCTION CHANGES
REV. A - POWER AMPLIFIER 19D902797G7
REV. A - POWER AMPLIFIER BOARD 19D902794G7
To update PWB to new band splits and add power monitor circuitry.
Added dual operational amplifier U2
Added capacitor C48.
Added resistors R54, R53, R55.
REV. A - POWER AMPLIFIER 19D902797G8, G9, G11
REV. A - POWER AMPLIFIER BOARD 19D902794G8, G9, G11
REV. B - POWER AMPLIFIER 19D902797G6, G7
REV. B - POWER AMPLIFIER BOARD 19D902794G6, G7
REV. E - POWER AMPLIFIER 19D902797G3
REV. E - POWER AMPLIFIER BOARD 19D902794G3
To update PWB to new band splits for 492-512 MHz.
REV. F -
POWER AMPLIFIER BOARD 19D902794G3
To improve the collector match of the final stage at the upper end of the frequency range
(450-470 MHz). Changed capacitors C88 and C90 from 39 pF to 33 pF. Capacitors C88
and C90 was 19A70006P48.
In
TABLE 1
of the Schematic Diagram, under 450-470 MHz
Changed capacitors C88 and C90 from 39 pF to 33 pF.
REV. B - POWER AMPLIFIER 19D902797G11
To
improve reliability.
Changed capacitor C67. Capacitor C67 was 39 pF (19A700006P50).
REV. A - POWER AMPLIFIER 19D902797G10
REV. A - POWER AMPLIFIER BOARD 19D902794G10
To improve the collector match of the final stage at the upper end of the frequency range.
Changed capacitors C87 and C90. Capacitors C87 and C90 were 33.0 pF
(19A700006P48).
REV. B - POWER AMPLIFIER BOARD 19D902794G10
To improve the total current drain in the UHF 492 to 512 MHz split. Changed capacitors
in the PA section as follows:
In
TABLE 1
of the Schematic Diagram, under 492-512 MHz
Changed capacitor C30 from 8.2 pF to "not used".
Changed capacitor C31 from 8.2 pF to "not used".
Changed capacitor C34 from "not used" to "8.2 pF".
Changed capacitor C35 from "not used" to "8.2 pF".
REV. F -
POWER AMPLIFIER 19D902797G3
REV. F -
POWER AMPLIFIER 19D902797G6
REV. F -
POWER AMPLIFIER 19D902797G7
REV. F -
POWER AMPLIFIER 19D902797G8
REV. F -
POWER AMPLIFIER 19D902797G9
REV. F -
POWER AMPLIFIER 19D902797G10
REV. F -
POWER AMPLIFIER 19D902797G11
To identify UHF Power Amplifiers built using solder with 2% silver for everything but
collector leads and solder type NTA 335 48/1 for all collector leads.
REV. G -
POWER AMPLIFIER 19D902797G3
REV. G -
POWER AMPLIFIER 19D902797G6
REV. G -
POWER AMPLIFIER 19D902797G7
REV. G -
POWER AMPLIFIER 19D902797G8
24
LBI-38674L
Содержание 19D902797G10
Страница 27: ...IC DATA U7 MMIC Amplifier 344A3907P1 LBI 38674L 27 ...
Страница 28: ... Intentionally Left Blank 28 LBI 38674L ...
Страница 30: ...ASSEMBLY DIAGRAM 8 2 COVER ASSEMBLY 19B801659G3 19B801659 Sh 2 Rev 3 19D902797 Sh 2 Rev 16 30 LBI 38674L ...
Страница 35: ... Intentionally Left Blank LBI 38674L 35 ...
