RL Drake FF-1 Fixed Frequency Adapter Accessory Crystal 5001.00

This RL Drake FF-1 Fixed Frequency Adapter Accessory Crystal 5001.00, has been checked and is working properly as tested in an FF-1

To calculate the FF-1 crystal frequency:

Band    Range           Formula (fd=desired frequency)
49.5    49.4-50.0       fd -44.5 = FF-1 crystal frequency
50.0    49.9-50.5       fd -45.0 =      "
50.5    50.4-51.0       fd -45.5 =      "
51.0    50.9-51.5       fd -46.0 =      "
51.5    51.4-52.0       fd -46.5 =      "
52.0    51.9-52.5       fd -47.0 =      "
52.5    52.4-53.0       fd -47.5 =      "
53.0    52.9-53.5       fd -48.0 =      "
53.5    53.4-54.0       fd -48.5 =      "

     For example: Desired frequency is 50.160 MHz. Band 50.0 MHz. Subtract 45.0 MHz from 50.160 MHz and 5.160 MHz is the frequency of the crystal needed for the FF-1. Add a kHz for CW operation.

The Drake FF-1 fixed frequency adapter is disigned to work with the TR-4 series.
Has two crystal sockets. Crystals are not supplied. 8 x 0.75 x 3.5 inches. 11 ounces.