Ten-Tec 242 Manual

Pt. No. 74065
MODEL 242 REMOTE VFO
TEN-TEC Model 242 Remote VFO is an accessory addition to the TRITON IV
transceiving system which allows setting up two frequencies of operation. A
MODE switch with LED indicators provides selection of any one of six modes of
operation: TRITON transmit and receive; REMOTE transmit and receive; TRITON
transmit-REMOTE receive; REMOTE transmit-TRITON receive; TRITON transmit-
both receive; REMOTE transmit-both receive. Full instant break-in is retained
no matter what mode is selected, and because of the broadband design in the
TRITON, frequencies, even though far removed from one another but on the same
band, will be processed equally and under optimum conditions in the transmitter
without readjustment.
In addition to the remote VFO capability, a two position crystal oscillator
may be selected as the remote generator for fixed frequency operation, such as
for MARS or net operation. Out-of-band crystals within limits outlined below
may be selected, as well as in-band frequencies.
Model 242 covers all Amateur HF frequencies between 3.5 and 29.0 MHz.
Additional crystals are available to extend the 10 meter band to 30.0 MHz.
'Transceivers with Serial Numbers below 1400 require a simple VFO modificat-
fon described in service Note SN-1-540, which i Attached to and a part of these
ructions. Failure στι this modification will result in unacceptable
i n performance and chirp.
INSTALLATION *
To install Model 242 into the TRITON IV system, proceed as follow:
1.) Remove dummy ACCESSORIES plug from socket on rear panel of TRITON IV,
Save plug for possible use in future if additional accessories are added.
2.) Insert plug attached to Model 242 cable into TRITON ACCESSORIES socket.
3.) If it is intended that Model 242 be placed along side of the TRITON,
with both units raised by means of their snap-down legs, it is recom-
mended that the two plastic leg extenders supplied with the unit be in-
Stalled on the two rear rubber feet. This will result in the two front
panels being in the same plane.
To do this, remove the two rear feet
by unscrewing the screws securing them, With the screws still through
the rubber feet, place a h" long extender on each screw and reinstall
ιο feet.
4.) Although the table on page 3 of SN-1-540 indicates that the dummy plug
should be inserted into socket on rear of Model 242, this is unnecessary.
'The required jumper between pins 6 and 7 has been installed in the cable
plug.
* If more than one accessory is used with the TRITON IV, see special instruct-
ions in Service Note SN-1-540, attached.
FULL TEN METER COVERAGE
Model 242 as shipped from the factory has VFO mixer crystals installed
which permit operation between 28.0 and 29.0 MHz. Two additional crystals are
available as accessories which extend coverage to 30.0 MHz. Model 212 Crystal
provides coverage in the 29.0 to 29.5 MHz segment and Model 213 in the 29.5 to
30.0 MHz segment.
To install either or both of these crystals, remove the two screws on the
back lip of the top cover and slide top back and out of groves. A two-crystal
socket is mounted on the small PC board that is an integral part of the four
position, 28-30 MHZ front panel switch. Plug Model 212 into the socket adjacent
to the two crystals already wired into the PC board, and Model 213 crystal into