[time-nuts] TrueTime 820-350 display

[Rob Kimberley]

I believe there were variations of IRIG which sent the signal (un-modulated
or DC code) over a differential circuit, so Triax may have been used.

Rob K

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of paul swed
Sent: 09 February 2013 16:45
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] truetime 820-350 display

Yes that was the way they used to send differential data most likely a
timecode signal, but also most likely not IRIG it would not have ever needed
a triax feed. Triax was quite expensive and fell out of favor about 1985.
How many of these things do you have??
Many of the old true-times like the dc goes 468 are simply nice cases with a
display. Virtually every other bit of the insides is useless. I do use the
cases for projects and typically pick them up at hamfests for $5. Great
1 rack unit case. Plus I do like the old displays. :-) Anyhow if you do run
across a True-time DC-60. Keep me in mind. Now that they no longer work with
WWVB I want to pick one up to experiment with.
Regards
Paul.

On Fri, Feb 8, 2013 at 10:19 PM, Tammy A. Wisdom
<tammy-lists at wiztech.biz>wrote:

> Any idea what the triax connector is for?
>
> --Tammy
>
>
>
>
> ----- Original Message -----
> > From: "Tom Knox" <actast at hotmail.com>
> > To: "Time-Nuts" <time-nuts at febo.com>
> > Sent: Friday, February 8, 2013 4:08:28 PM
> > Subject: Re: [time-nuts] truetime 820-350 display
> >
> >
> > Hi Tammy;
> > Here is a link to the operation and service manual on Symmetricoms site:
> > www.symmetricom.com/link.cfm?lid=5283
> > Best Wishes;
> > Thomas Knox
> >
> > 4475 Whitney Place
> > Boulder Colorado 80305
> >
> > 1-303-554-0307
> >
> > > Date: Fri, 8 Feb 2013 15:35:56 -0700
> > > From: tammy-lists at wiztech.biz
> > > To: time-nuts at febo.com
> > > Subject: [time-nuts] truetime 820-350 display
> > >
> > > Hi All,
> > >
> > > I ended up with some trutime 820-350 displays and I am trying to 
> > > find
> out
> > > anything about them.  Does anyone here have a manual paper or
> electronic
> > > for them?  What timecode format do they use?  These displays have 
> > > a
> triax
> > > BNC on them so im scratching my head as to what they were 
> > > connected
> too.
> > > Please let me know if you have any ideas.
> > > Thanks
> > > --Tammy
> > >
> > >
> > >
> > >
> > > --
> > >
> > > Tammy A Wisdom
> > > The Summit Open Source Development Group
> > > http://www.sosdg.org   /  http://www.ahbl.org
> > >
> > > _______________________________________________
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