[time-nuts] Truetime GPS-DC-416 specs ?

Bob Camp kb8tq at n1k.org
Fri Nov 28 10:07:49 EST 2014


Hi

One quick thing to check (I have never seen one of these): 

Some of the early boxes used downconverters at the antenna end rather than just a preamp at the antenna. On a few boxes the giveaway was two coax ports headed to the downconverter. On most everything was multiplexed on one cable. If you need a downconverter and it did not come with the box, they are pretty tough to find. I have several boxes sitting around lacking downconverters to make them work.

Another thing it might have is an odd preamp voltage to the antenna. That’s a lot easier to get around than the downconverter. A DC block and bias tee will do the trick. Just don’t plug a 5V antenna into it before you check to see if it’s got something like 12V on the coax ...

Bob

> On Nov 28, 2014, at 8:31 AM, paul swed <paulswedb at gmail.com> wrote:
> 
> Tim
> I have nothing.
> But if it seems operational given the time frame it was built you may run
> into the gud ole rollover issue. This can usually be gotten around by
> setting the date and time to a 1024 week from whatever the GPS week is
> today.
> There are calculators online.
> But I suspect if it powers up the real trick is how do you even tell it to
> do that.
> Pretty sure it would be an rs232 interface and 9600 8n1. But thats aguess
> from other truetime products.
> Good luck.
> Paul
> WB8TSL
> 
> On Thu, Nov 27, 2014 at 10:44 PM, Tim <timt at skybase.net> wrote:
> 
>> Hi all,
>> 
>> Googling around I cant find much info on the Truetime GPS-DC-416
>> 
>> Does anyone have information or specification on that particular model ?
>> 
>> thanks
>> 
>> Tim
>> 
>> --
>> VK2XAX :: QF56if23 :: BMARC :: WIA :: AMSATVK
>> 
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