The MA259 is a useful bit of kit in its own right,giving very accurate outputs of 5mhz,1mhz,and 100khz at about 1V rms into 50ohm.
These frequencies are derived from a 5 mhz crystal oscillator which is fitted in to a proportionally controlled oven.It is made up from two units the, PU525 power unit which may be fitted with rechargeable batteries (21, so be warned if you have to replace them !) incase of mains failiure,and the SA500 oscillator unit.
A dial and a rotary switch enable the various outputs and oscillator temperatures to be monitored.
This unit could be found with a number of RACAL equipment configurations.
|MA259E||Admiralty shipborne version on MA259|
|MA259F||Admiralty shore version of MA259|
|MA259G||RAF version of MA259|
|MA259H||Admiralty Frequency Standard ( Portable Version)|
MA141 Hf distortion indication unit
Back to Keiths RACAL main page