Hi Yet again another quick read mistake :)
Bobb > On May 23, 2017, at 7:35 AM, Tim Shoppa <[email protected]> wrote: > > Bob, that was 16.368MHz, an extremely common crystal to find in the first > couple generations of GPS receivers. 16.368 MHz is 16 times the 1.023 MHz > C/A GPS signal chipping rate; multiplied by 96.25 to get the 1575.42 MHz L1 > frequency and multiplied by 75 to get the 1227.60 MHz L2 frequency. > > Tim N3QE > > On Tue, May 23, 2017 at 7:24 AM, Bob kb8tq <[email protected]> wrote: > >> Hi >> >> If you guess that the design started in 90 and ran through 93~94 that >> is a very early unit for Trimble. 16.384 MHz suggests some sort of telecom >> or data bus application. >> >> Bob >> >>> On May 22, 2017, at 11:48 AM, Scott Armstrong <[email protected]> wrote: >>> >>> Hi Guys, >>> >>> I popped open the case. Not too crowded in side. The case is an extruded >>> aluminum case that has the back endplate welded on. >>> >>> There are 4 board assemblies in the case. >>> >>> *Interface board that connects the 22 pin connector to the other two >> boards. >>> * Power supply board. (12016-00). Main component looks to be a DC-DC >>> converter made by Computer Products. >>> * Main board (14636-) This board has a 16.368 MHz osc made by NDK. >>> * A daughter board (14789E) which is the receiver and is attached to the >>> main board. >>> >>> Date codes I see are 89, 91, 92 and 93 so unit was probably assembled in >>> '93. >>> >>> Maybe some of the assembly numbers will be recognizable if they are used >> in >>> other units. >>> >>> Thanks, >>> Scott AA5AM >>> >>> >>> On Sat, May 20, 2017 at 12:33 AM, Bill Hawkins <[email protected]> >> wrote: >>> >>>> FWIW, that looks like aviation equipment (gov't or civil), with a >>>> locking connector. >>>> >>>> That stuff is designed for minimum size and weight. You might find the >>>> inside of the box quite cramped. >>>> >>>> Buying aviation parts is even more expensive than buying boat parts. >>>> >>>> Bill Hawkins >>>> >>>> >>>> -----Original Message----- >>>> From: time-nuts on behalf Of Bob Bownes >>>> Sent: Friday, May 19, 2017 10:48 PM >>>> >>>> Pretty sure that connector is an off the shelf Amphenol part. If you >>>> can't find it, however, you can replace it with an off the shelf one >>>> that will fit in the same hole. (If your lucky, you can even re-use the >>>> pins.) >>>> >>>> The replacement will run you about $30-40 for the pair, chassis and >>>> plug. Check Mouser, etc. >>>> >>>>> On May 19, 2017, at 23:21, Bob kb8tq <[email protected]> wrote: >>>>> >>>>> The mating side of that 22 pin connector isn't going to be cheap. It >>>>> looks like something out of their government systems group back in the >>>> late 90's. If it is, you may have a hard time getting info on it. >>>>> I'd pop it open and see what's inside. At least that will give you an >>>>> idea if it's 20 years old or 5 years old. Knowing the era should help >>>> in the search for information. >>>>> >>>>> Bob >>>>> >>>>>> On May 19, 2017, at 10:21 PM, Scott Armstrong <[email protected]> wrote: >>>>>> >>>>>> I acquired a Trimble 16634-10 receiver. A search of the web has >>>>>> turned up nothing so far. >>>>>> The unit is in a steel box built like a tank. SMA connector for >>>>>> antenna input and a 22 pin circular connector for the I/O and power >>>>>> >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- [email protected] >>>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >>>> mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> mailman/listinfo/time-nuts >>> and follow the instructions there. >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
