[time-nuts] Spectracom 8140T Line Tap Schematic

Charles Steinmetz csteinmetz at yandex.com
Thu Jun 14 21:41:02 EDT 2018

Julien wrote:

> I'm somewhat tempted to take the schematic and see if I can fit it in
> the comparatively tiny Pomona boxes

Before getting too excited about the various 8140 module designs, it may 
be worth reflecting that the performance of the 8140 system is mediocre 
at best from a time-nuts perspective.  There are lots and lots of much 
better designs if you're building your own.  Even something as simple as 
a modified video distribution amplifier can be orders of magnitude 
better (see, e.g., 

The point of the 8140 system is that it is a moderate performance, "do 
everything" solution for large installations (hundreds of potentially 
multifrequency taps spaced around acres of facility), not a 
time-nuts-quality distribution system for a facility the size of a 
residential home.

Best regards,


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