[time-nuts] Re: Kinemetrics Truetime 468-DC usability

[paul swed]

Sorry I should have mentioned. The display being blank while searching is
normal. If you pop the top there is a switch or jumper that will display
search codes while hunting.
The system absolutely will not do anything without the down converter. But
since there is no satellite signal it doesn't matter.
Thats why in the simulator injects the data directly into the receiver. It
made no sense to build a RF front end to the simulator.
Great discussion.
Regards
Paul
WB8TSL

On Fri, Sep 1, 2023 at 10:17 AM paul swed <paulswedb at gmail.com> wrote:

> Matt
> Very happy to see that you designed a more modern version with an Atmel
> device and a nice board also.
> Glad to see you have a old DC468 working. I always liked the display.
> Would love to see your code out of curiosity. Especially how you are
> handling the 1 second timing.
> Lets see that now means there are 2 DC468s that can display time.... Humor
> Thanks
> Paul
> WB8TSL
>
> On Fri, Sep 1, 2023 at 5:58 AM D. Resor via time-nuts <
> time-nuts at lists.febo.com> wrote:
>
>> Thanks everyone for your help and input.  It seemed a bit suspicious that
>> I could not find any current information on what is obviously dead
>> technology.
>>
>> Don Resor
>>
>> -----Original Message-----
>> From: Tom Van Baak via time-nuts <time-nuts at lists.febo.com>
>> Sent: Thursday, August 31, 2023 1:49 PM
>> To: Discussion of precise time and frequency measurement <
>> time-nuts at lists.febo.com>
>> Cc: Tom Van Baak <tvb at LeapSecond.com>
>> Subject: [time-nuts] Re: Kinemetrics Truetime 468-DC usability
>>
>> Hi Don,
>>
>> The GOES timing service went off the air almost 20 years ago. An
>> extremely informative article:
>>
>> "The GOES Time Code Service, 1974–2004: A Retrospective"
>> by Michael A. Lombardi and D. Wayne Hanson
>> https://tf.nist.gov/general/pdf/2013.pdf
>> also available at:
>>
>> https://www.nist.gov/publications/goes-time-code-service-1974-2004-retrospective
>>
>> The old Truetime receivers are still found on eBay now and then. Some
>> people buy them just to re-purpose the 1U case and attractive plasma
>> digital display. The display tubes are sometimes discussed over on the Neon
>> / Nixie mailing list
>>
>> /tvb
>>
>> On 8/31/2023 12:23 PM, D. Resor via time-nuts wrote:
>> > There is a very reasonably priced working Truetime 468-DC receiver
>> > available for purchase.
>> >
>> > I found and downloaded the Op/Installation guide.
>> >
>> > I have tried searching for some answers via the internet but came up
>> > with no definitive answers.
>> >
>> > While searching for information concerning the GOES Satellite.  I was
>> > unable to determine if the East/West frequencies 468.8250 MHz and
>> > 468.8375 MHz are still in use.
>> >
>> > According the manual there were two options for the GPS antenna, the
>> > A-468MS or the A-468H.  Seems these are both more rare than hens
>> > teeth, and if found can be very expensive.
>> >
>> > Must one of these two above mentioned antenna models be used, or can
>> > newer/later GPS antenna be installed instead?
>> >
>> > Seems this unit does not suffer from the 25 year calendar roll-back.
>> >
>> > Opening a can of worms here I'm sure, are there any other condemning
>> > considerations I have overlooked?
>> >
>> > Thank You
>> >
>> > Don Resor
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