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@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.