[time-nuts] 5087B (was What's the cleanest way to produce 1 and 5 MHz from 10 MHz?)

christopher hoover ch at murgatroid.com
Tue Jul 28 23:48:29 UTC 2009


From: "Lux, James P (337C)" <james.p.lux at jpl.nasa.gov> wrote:

>
> > There's slots for three input modules (A,B,C), and 10 output modules 
> (1-10), and they're all optional and easily reconfigurable.
Just to be clear, the modules themselves aren't reconfigurable, but the 
mainframe is.  

That said, the 1 MHz, 5 MHz and 10 MHz output amps share the same 
circuit topology and board layout (although IIRC the actual boards are 
marked distinctly.).   It is easy to convert a 5MHz output amp to 10MHz 
and vice versa by changing a couple off-the-shelf Cs.   The 1MHz output 
amp has a different transformer in addition to several other parts.  The 
transformers are HP specials with unspecified characteristics.

-ch




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