[time-nuts] spectracom line taps

James R. Gorr n3toy at yahoo.com
Tue Feb 19 19:01:04 UTC 2008


OK, well it looks like the taps are needed for the
proper operation of this device.  I will just get a
TADD1.  Thanks for the input.  

--- Bill Janssen <billj at ieee.org> wrote:

> John Ackermann N8UR wrote:
> > jshank said the following on 02/18/2008 03:05 PM:
> >   
> >> Jamie,
> >>
> >> If you have the Spectracom 8140 you need to use
> the line taps.  With out 
> >> using the line taps you sinewave will not be
> symmetrically along 0 voltage, 
> >> that is the sine wave will all be positive
> voltage.
> >>     
> >
> > I'm not certain about that; while I haven't used
> an 8140 amplifier, I
> > have an 8164 WWVB disciplined oscillator that has
> an option installed to
> > allow it to run a string of 8140T taps.  I was
> able to use those outputs
> > directly by using a series cap to isolate the DC
> voltage; what's left is
> > the 10 MHz sine wave.  As I noted in my other
> post, it does want to see
> > a 50 ohm load (after the isolating cap) or the
> fault indicator may go
> > on.  I suspect the 8140 amp is very similar;
> Spectracom did a lot of
> > design reuse across their products.
> >
> > John
> Be careful with that termination. If the  output has
> 12 volts DC you 
> would need an isolating cap.
> The Line Taps were intended for a production line
> where the taps could 
> just be plugged in
> and would get their power from the coax. Some were
> made that had a power 
> jack and those
> could be powered from a "wall transformer".
> 
> Bill K7NOM
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
>
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> 



      ____________________________________________________________________________________
Looking for last minute shopping deals?  
Find them fast with Yahoo! Search.  http://tools.search.yahoo.com/newsearch/category.php?category=shopping




More information about the Time-nuts_lists.febo.com mailing list