Specifications
*C 2
Field (Fourth Echoion)
TEST SET,
C
HANGE
No. 2
TM 11-6625-496-45
and Depot Maintenance Manual
RADIO AN/VRM-1
HEADQUARTERS
DEPARTMENT OF THE ARMY
W
ASHINGTON
, D.C., 23 April 1964
TM 11-6625-496-45, 3 July 1962, is changed as follows:
Page 2, paragraph 1.
Delete subparagraph c
(including the note) and d and substitute:
c. For applicable forms and records, see para-
graph 2. TM 11-6625-496-12.
d. The direct reporting, by the individual user,
of errors, omissions, and recommendations for im-
proving this manual is authorized and encouraged.
DA Form 2028 (Recommended changes to DA
technical manual parts lists or supply manual 7,
8, or 9) will be used for reporting these improve-
ments. This form will be completed in triplcate
by the use of pencil, pen, or typewriter. The
original and one copy will be forwarded direct to
Commanding Officer, U.S. Army Electronics Ma-
teriel Support Agency, ATTN: SELMS-MP, Fort
Monmouth, N.J. 07703. One information copy
will be furnished to the individual’s immediate
supervisor (officer, noncommissioned officer, super-
visor, etc.).
Add paragraph 1.1 after paragraph 1:
1.1. index of Publications
Refer to the latest issue of DA Pam 310-4 to
determine whether there are new editions, changes,
or additional publications pertaining to the equip-
ment
DA Pam 310-4 is an index of current tech-
nical manuals, technical bulletins, supply manuals
(types 4, 6, 7, 8, and 9), supply bulletins, lubrica-
tion orders, and modification work orders avail-
able through publications supply channels. The
index lists the individual parts (-10, -20, -35P,
etc. ) and the latest changes to and revisions of each
equipment publication.
Page 5, figure 2, FIRST 11.5 MC AMPL (as
changed by C 1, 13 Jan 64). Change transistor
Q7601 type from “2N502” to: 2N502B.
Page 6, figure 3 (as changed by C 1, 13 Jan 64).
Change the value of R7707 from “ 1800” to: 5.6K.
Page 7, paragraph 8a(2) (as change by C1,13
Jan 64). At the end of subparagraph (2), insert:
Note. In some test” probes, L7302 has been re-
placed by 270-ohm resistor R7304. A 510-µµf
capacitor C7304 has been added. (See note in
figure 5.) Capacitor C7302 has been removed.
Figure 4, FIRST 47.0 MC AMPL (as changed
by C 1, 13 Jan 64). Change the transistor Q7702
type from “2N502A” to: 2N502B.
After paragraph 8a(2) add (as added by C 1, 13
Jan 64):
(3) To eliminate undesired high frequency
oscillations,
some RF amplifier test
probes have been modified as follows
(note 1, fig. 5.1).
(a) Inductor 1.7302 has been removed.
(b) Resistor R7304 and C7304 have been
(4)
wired in as shown in figure 5.1.
To eliminate undesired high frequency
oscillations in RF amplifier test probes
that me permanent] y sealed, components
have been added to the test probe out-
puts (note 2, fig. 5.1) as follows:
(b)
(c)
Page 8.
Resistor R7304 and a 0.l-µf capacitor
are connected in series and wired be-
tween the RF output of the probe and
ground (fig. 5.1).
A 510-µµf capacitor is connected be-
tween the audio output of the. probe
and ground.
These components are mounted inside
the case of the test set near the en-
trance of the probe cable.
(As added by C 1, 13 Jan 64) After
figure 5, insert figure 5.1.
Page 15, D of figure 10 (as changed by C 1, 13
Jan 64). Change the value of R7911 to: 84.5.
1
*This change supersedes C1, 13 January 1964.