Re: [time-nuts] Looking for info on Trimble 16634-10

Hi Guys, Found a little info.. The main board/receiver used in this unit is also used in the Trimble Placer 100 and RefTek 73A. Hopefully, these two leads may develop into some useful info. Thanks, Scott AA5AM On Tue, May 23, 2017 at 6:59 AM, Bob kb8tq wrote: > Hi > > Yet

Re: [time-nuts] Looking for info on Trimble 16634-10

Hi Yet again another quick read mistake :) Bobb > On May 23, 2017, at 7:35 AM, Tim Shoppa 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

Re: [time-nuts] Looking for info on Trimble 16634-10

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

Re: [time-nuts] Looking for info on Trimble 16634-10

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 wrote: > > Hi Guys, > > I popped open the case.

Re: [time-nuts] Looking for info on Trimble 16634-10

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

Re: [time-nuts] Looking for info on Trimble 16634-10

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

Re: [time-nuts] Looking for info on Trimble 16634-10

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.

Re: [time-nuts] Looking for info on Trimble 16634-10

Hi 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

[time-nuts] Looking for info on Trimble 16634-10

Hello all, 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 Does anyone have any pin out information, specs, etc.? A