Ordering Crystals - Radio Shack BTX-123 Owner's Manual

7. Replace the two screws you
removed from the battery guide
plate, then
screws.
8. Replace the battery pack and
the antenna.

Ordering Crystals

To determine the crystals you need,
use the following formulas:
Transmit Crystal:
Operating Frequency
8
Receive Crystal:
Operating Frequency — 10.7 (MHz)
For example, to transmit and re-
ceive on 151.455 MHz, specify a
transmit crystal
(151.455 MHz/8) and a receive
crystal of 35.18875 MHz ( (151.455
– 10.7 MHz)/4).
tighten all
4
of 18.931875
We recommend you only order crys-
tals for this transceiver through your
the local RadioShack store. If you do
purchase them from another source,
the following information might be
helpful:
• Case Type: HC-50/T
• Load Capacitance: 20 pF
13