Specifications

Page 24, paragraph 36. Add the following as
the introductory paragraph:
The front panel and chassis of the TS-1777/VRM-
1 (AN/VRM-l) and TS-1777A/VRM-l (fig. 11.1)
(AN/VRM-lA) are identical in dimensions but
the case of each is different (para 1 d). Conse-
quently
t
the front panel and chassis of either
odel can be put in the case of the other model
Page 33, paragraph 43. Designate the existing
note as 1 and l dd the following notes:
NOTE 2
All test voltages (ac and dc) applied
to the test probe (c through h below)
shall be increased gradually and shall be
applied instantaneoualy after each in-
crement; and the signal source
shall not
be connected to the test set while the
level of the applied voltage is being
changed or while the adjustment con-
trol in the test set under test is being
changed. Therefore, the procedures in c
through h below shall be performed in
such a way as to accommodate this in-
stantaneous application of the test volt-
ages
NOTE 3
The light indication change should be
almost instantaneous at the moment of
touching the test probe to the applied
test voltage, except for the 1000-Hz
(audio) tests given in- e below. Thus, in
the audio test the light change should
occur within 10 seconds after the appli-
cation of the proper voltage to the test
probe.
NOTE 4
Refer to the appropriate adjustment
procedures given in c through h below
when the test requirements of a par-
ticular circuit (para 47 through 51, and
64 through 67) cannot be obtained.
Page 35, paragraph 43c(10), last line. Change
"13.0
-
volts to: 13.5 Volts. (When the GREEN
indicator goes out, the RED indicator should
light.)
Paragraph 43e(l) (b), line 2. Change “ME-
20B/U” to: AN/URM-145.
Page 36, paragraph 43h (6), last line. Change
“210 mv” to: 115 mv.
Page 37. Add new figure 23.1 after figure 23.
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