[Premium-Rx] Racal 9400 reference osc "jumpy"

[Michael O'Beirne]

Hi guys

To add my few pence into this thread, you can also find many of Racal-Dana 
5MHz units in cheap surplus equipment.  For example my old Racal-Dana 9916 
frequency counter has an excellent 9442 standard (drift of 3 parts in 10^9 
per degree C), and the same is also fitted in many RA1792 receivers.

I advertised this mint condition 600 MHz counter for £35 some time ago ago 
in RadCom but no one was interested.  The frequency standard alone was then 
worth quite a bit more than that figure!  It does not say much for the 
technical knowledge of much of the amateur community!!

The last price I saw for such a standard on eBay was about £25, so not 
exactly megabucks.

Another source is old scrapped Piccolo modems, the LA 1117.  My one has the 
top quality 9420 standard (drift of 6 parts in 10^10 per degree C).

The usual trouble is that some components have aged beyond the adjustment 
range of the trimmer.

73s
Michael
G8MOB