[time-nuts] Looking for Tracor 599 VLF Receiver Manual

paul swed paulswedb at gmail.com
Fri Jan 7 22:36:45 UTC 2011


Indeed would be very interested in the schematic of the synth.
Regards
Paul.

On Thu, Jan 6, 2011 at 3:49 PM, <EWKehren at aol.com> wrote:

> Arthur,
>  you mention that the 204 can select 60 KHz by thumbwheel. Do you have  a
> schematic of that synthesizer? I know they had a 60 KHz down converter I
> have
>  modified my unit and in my TI days modified quite a few for our cal labs
> by  setting the oscillator to 122 KHz dividing it by two and driving the
> mixer.  Still have one working and think it is still the best.
> Bert
>
>
> In a message dated 1/6/2011 11:05:25 A.M. Eastern Standard Time,
> golgarfrincham at yahoo.com writes:
>
> There  were quite a few variations of the Tracor 599 receivers. Actually
> the
> 599K  had the synthesizer built into the 599-204 receiver module and had
> a  thumbwheel switch that you could use to to select 60.0Khz for  WWVB
> reception plus a srtipchart recorder to plot the phase  difference.
>
> The 599-201 receiver schematic I've linked to may be like  the 599-203
> module you have except for the number of filters it can  accept. There is a
> broadband amplifier feeding the filter you select that  sends that signal
> to
> the mixer where the L.O. of the received signal  frequency +/- 1Khz is
> combined to give the 1Khz I.F. frequency that is fed  through a filter and
> an amp to the other modules. If your synthesizer only  goes to 30.9KHZ
> you would have to modify that output to either 59.0Khz or  61.0Khz in order
> to get the required 1Khz I.F. frequency. You would also  need an
> appropriate
> 60Khz xtal filter to place after the broadband  amplifier. With all the old
> germanium transistors used I'd question how  reliable the receiver would
> be.
>
> For a receiver that was made about  1960 I really don't think it is worth
> the
> effort. Having said that, I do  have an even older RMS Engineering VLF
> comparator modified to receive WWVB  that has been running for about
> 20  years.
>
> http://farm6.static.flickr.com/5163/5330411094_743371545b_b.jpg
>
> -Arthur
>
>
>
>
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