f. If the facsimile transceiver output is too high
other end into the phones output jack of the radio
receiver. This is the receiving connection.
for the radio transmitter input circuit, reduce the
gain of the radio transmitter preamplifier. A
b. Plug one end of Cord CD-1019 into the
temporary alternative, for example, is to set up
RADIO XMTR jack (J3) on the transceiver.
the facsimile transceiver in the normal manner,
Plug the other end into the microphone jack of
the radio transmitter. This is the transmitting
then reduce its maximum output by turning the
GAIN control until the maximum meter reading is
connection.
c. Plug the radio carbon microphone into the
-4 db.
CARBON MIKE jack (J4) of the transceiver.
d. Plug the radio headset into the PHONES
jack (J1) on the transceiver. The radio transmit-
When Facsimile Set AN/TXC-1(*) is used for
ter and receiver may be operated normally for
photographic reception of copy, install the equip-
radio voice communication while the transceiver
ment in a large, well-ventilated darkroom from
selector switch is set at either the SET RANGE or
which all light is excluded. A large sink and run-
STANDBY position.
ning water are necessary.
e. If the radio receiver output is too low for the
a. Safelight. Install a safelight equipped with
transceiver, check the label on the small circular
a Wratten series OA filter, or its equivalent.
tag screwed to the terminal board between the
This gives a yellowish green light. Locate the
RADIO RCVR and PHONES jack. Ordinarily,
light approximately 5 feet from both the trans-
the tag will read 2,500 ohms (this indicates the
ceiver and the sink.
impedance at which the transceiver input circuit
b. Additional Equipment. In addition to Pho-
is set to match the phones circuit output of the
tographic Equipment PH-549/TXC-1 which is
conventional radio receiver). Some radio receiver
supplied with Facsimile Set AN/TXC-1(*), the
circuits have a 250-ohm output. Connection of a
following equipment is desirable:
250-ohm receiver output to the 2,500-ohm trans-
1 electric print dryer.
ceiver input will be indicated by a failure to get a
1 gross each of contact printing paper, single
sufficiently high reading on the transceiver DB
weight, 12 inches by 18 inches, contrast
METER, even though the transceiver GAIN
F1, F2, F3, and F4, Eastman Kodak or
control (R59, R60) may be set at maximum and
equal.
the monitored signal may sound loud in the head-
2 dozen each, contact printing paper, contrast
set plugged into the PHONES jack. To change
F0 and F5.
the transceiver input to match a 250-ohm receiver
1 contact printer, 18 inches by 22 inches.
output circuit, proceed as follows:
1 darkroom clock with sweep second hand.
(1) Remove the back cover of the trans-
1 squeegee, 10 inches long.
ceiver to gain access to the terminal
2 or more ferrotype plates, chrome, to fit
board mounted inside the transceiver on
electric dryer.
the metal brace near the DB METER.
2 print tongs.
Connect a wire between terminals 1 and
2 of the terminal board to short-circuit
resistor R79 (fig. 168).
Reconditioned Equipment
(2) Remove the wire which is soldered to
terminal 3, and solder it to terminal 4.
uncrating, unpacking, and checking the equip-
This places resistor R82 in the circuit.
ment.
(3) Replace the transceiver rear cover.
b. Check equipment for tags or other indications
(4) Remove the two screws that hold the
pertaining to modifications (par. 11) or other
round tag in place on the outside terminal
changes. If any changes in the wiring (other than
board. Turn the tag over so that the
the modifications listed in paragraph 11) have
exposed side reads 250 ohms. Replace
been made, note the change on the schematic
the screws.
diagram in this manual.
Note. To avoid pick-up while receiving, it
c. Check and lubricate the equipment as in-
may be necessary to connect the GNI) binding
structed in paragraphs 44 through 47.
post to one of the LINE binding posts or to the
d. Perform the installation and connection pro-
REC C T binding post. Remove this connec-
cedures outlined in this section.
tion when transmitting.
