[time-nuts] Re: Current-day GPS timing receivers

[Bob kb8tq]

Hi

Building a kit is very different than a from scratch design. A 
Heathkit (to extend the years ago ham radio analogy) radio
was an option when you shopped for your Drake. Building it
would give you some experience. 

The Heathkit *design* was done for you and all the complicated
higher level stuff was worked out / tested out / reworked / retested
by somebody else. As long as you put it together correctly, it
worked and was a good radio. 

These days there aren’t a lot of folks selling kit GPSDO’s. Even 
the kit radio business isn’t what it once was. “I’m going to do
a GPSDO” these days generally means a scratch design.

Bob

> On Feb 19, 2022, at 2:41 AM, Bill Beam <wbeam at gci.net> wrote:
> 
> But there is a magazine article....
> <https://www.qsl.net/n9zia/wireless/QST_GPS.pdf>
> By Brooks Shera, W5OJM.  QST July, 1998.
> 
> Following this article I built my unit in 1998 using his PCB and a Motorola UT+.
> It has been running almost continuously since then - almost 25 years.
> It has been thru several HP 10811 and 10844 oscillators during that time.
> 
> Even though Brooks is SK his GPSDO is still running.
> 
> Regards.
> Bill, NL7F
> 
> On Fri, 18 Feb 2022 19:48:21 -0500, Bob kb8tq wrote:
> 
> 
>> On a GPSDO, there are no books. There are no magazine articles. The folks who 
>> design GPSDOG€™s donG€™t talk about whatG€™s inside. ItG€™s not so much the individuals, 
>> itG€™s how the companies operate. IP matters and it matters a lot. Practical stuff gets
>> buried as a result. You are off on a G€œinvent it from scratchG€ expedition (more or less).
> 
> 
> 
> Bill Beam
> NL7F
> 
> 
>