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Rev C boards can be either Verion 3 or 4. The
differences are all parts values:
Rev D boards are all version 5.
Rev
E boards are all version
6.
Rev B was not produced.
750309 COMP REV A
Version
RIOI
RI03
Rl25
Rl30
Rl31
Rl32
Rl33
Rl54
Rl62 Rl68
Rl70
Cl33
3
82K 82K
6.2K 1.5K
1.5K 1.5K
1.5K 5.6K
9.lK
68K
68K
lO~F
4
200K
200K
4.7K
4.7K
4.7K 4.7K 4.7 8.2K 3.9K 15K 10K
22~F
RECEIVE
BOARD
The
BTR-200
uses one
of
two receive boards.
Figure
6
Location
of
Rev Level
for
Versions 1
and
2
Early production units came with 70714000, and
750309 was installed in later units. 70714000
came in two versions that differed slightly (See
table below):
Version 2 was built only with Rev C boards.
Version 1 was built with Rev A, B, or C boards.
Thedifferentrevisions on this board were manufac-
turing changes that did not change the schematic.
750309 Rev
A boards are version
1.
750309 Rev
Band
C boards are version
2.
Some early version 1 boards did not have a shield
over the oscillator section
..
70714000
R327
R345 R363
R381 VR302
VR304 VR306 VR308
Version
1
4.7K 4.7K 4.7K 4.7K 10K 10K 10K 10K
2
10K 10K 10K 10K 20K 20K 20K
20K
2-2