[time-nuts] NTS-200 Antenna Power Mod

Jason Rabel jason at extremeoverclocking.com
Sat May 19 22:51:17 EDT 2007

I would be interested in seeing your solution, and I'm sure others would
too. I noticed a lot of the TrueTime/Symmetricom hardware uses a 12V antenna

On a side-note, does your NTS have any nifty non-standard options? Some
pictures of the general inside would be neat.


PS: I have a TS2100 GPS & NTS-100 IRIG.


Fellow clockers,

	I just got done reinstalling my TrueTime NTS-200 network time server
in a different rack. This required, among other things, installation of a
new antenna on the opposite side of the house from where my original one is.

	The new antenna was a Symmetricom/HP 58532A, which requires 5V bias.
Unfortunately, the NTS-200 was designed to supply 12V, and there is no easy
jumper or software setting to change that.

	So -- After a bit of work, I came up with a minimally-destructive
hardware modification to change the +12 feed to +5.

	If anyone else owns an NTS-200, and you've been wanting to use it
with a 5V antenna, drop me a note and I'll be happy to send you pictures and

	Fair warning: It requires fine-point soldering, a bit of wire-wrap
wire, and a lot of patience.

	Keep the peace(es).

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