Timenuts, Gentlemen, hello! I would like to make my little contribution to this discussion showing how I implemented my solution in my built PRS10 Box. For PPS and 10 MHz reference I am running since years successfully a Trimble Thunderbold together with the antenna fixed on the rooftop of my house (see pic).
My PRS10 together with the stretcher of the 10µs long PPS pulse to about 250ms do work like a charm already more then 12 months driving LEDs. This way I can easy visually check the PRS10. By the way, the PPS output of Thunderbolt, also 10µs long, can as well be visualized with this LED driver. But I had no problem to see the pulse on my very old 100MHz Tektronix analog scope (but this is not very convenient for daily check :-( ). As pictures do say more then 1000 words, I want to share the pictures of my hardware for limited time for private timenut use, showing my way to solve the problems with available tools and parts (beside eg. the RbO, Thunderbold, Antenna and other used parts ;-) ). Here you can open, view and/ or copy my pictures if you want: https://my.hidrive.com/share/wyaryf.3uq Comments? Enjoy! kind regards, Arnold, DK2WT Am 21.04.2020 um 04:25 schrieb Taka Kamiya via time-nuts:
Maybe everyone but I knew, but I just did this and found it useful. 1 pps signal from some GPS are notoriously narrow and difficult to sync on and see on scopes. LED will barely light if some kind of stretcher is not used. If your purpose is ONLY to see if it's there or not, hook up a small speaker, earphone, amplified or not, and you can hear the tick-tick sound. I like DIYing and many times, I wonder if pps distribution circuit is working. I can tell a very short pulse that will barely register on LED is clearly audible. I thought I'd share. --------------------------------------- (Mr.) Taka Kamiya KB4EMF / ex JF2DKG _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
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