Re: [time-nuts] Fix Trimble Oscillator??

jmi...@pop.net said: > I can confirm that the whole oscillator including oven runs on 12 volts. > However, you do have to connect two different pins to +12 and two different > pins to ground to make it work (see attached). ... Nice pictures/graphs. Thanks. What's the spike at 60KHz? There is

Re: [time-nuts] Fix Trimble Oscillator??

> jmi...@pop.net said: > > I can confirm that the whole oscillator including oven runs on 12 volts. > > However, you do have to connect two different pins to +12 and > two different > > pins to ground to make it work (see attached). ... > > Nice pictures/graphs. Thanks. > > What's the spike at 6

Re: [time-nuts] Fix Trimble Oscillator??

> > jmi...@pop.net said: > > > I can confirm that the whole oscillator including oven runs > on 12 volts. > > > However, you do have to connect two different pins to +12 and > > two different > > > pins to ground to make it work (see attached). ... > > > > Nice pictures/graphs. Thanks. > > > > W

Re: [time-nuts] Fix Trimble Oscillator??

John, Perhaps it is there and I did not see it, but do you have a schematic of the connections to the Trimble oscillator to go along with the picture? Thanks, Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of John Miles Sent: Thursd

Re: [time-nuts] Fix Trimble Oscillator??

> -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On > Behalf Of J. L. Trantham > Sent: Friday, April 22, 2011 3:34 AM > To: 'Discussion of precise time and frequency measurement' > Subject: Re: [time-nuts] Fix Trimble Oscillator?? > > > John, > > P

Re: [time-nuts] Fix Trimble Oscillator??

I couldn't tell from the picture but it looks like there is a diode from +12 VDC to ground and trimpot is connected to ground through a resistor. Mislabeled GND and +12 VDC? Or am I misinterpreting the picture? Also, could not make out what the small orange/black components are, one from +12 VDC

[time-nuts] Housing LPRO and Thunderbolt together

I have a dilemma and wish to access the collective wisdom of the group to advise a solution. I am building a clock generator based on a Thunderbolt. I have an LPRO and would also locate this in the same enclosure. I will also add a distribution amp and a divide chain in due course. The ulti

Re: [time-nuts] Housing LPRO and Thunderbolt together

My two cents, from living with both Thunderbolts and LPROs. They are entirely different kinds of beasts, and aren't suitable for long-term cohabitation without work. Tbolts like thermally stable environments, and are happier (meaning ADEV trending towards zero) when they are powered up in a s

Re: [time-nuts] Fix Trimble Oscillator??

John, Thanks for the clarification. It makes sense now. Thanks, Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of John Miles Sent: Friday, April 22, 2011 10:57 AM To: Discussion of precise time and frequency measurement Subject: Re

Re: [time-nuts] Fix Trimble Oscillator??

I removed the defective Trimble oscillator module. I suspect it is practically unrepairable. I did have a Micro Crystal OCXO-BV5 left over from a dead Odetics GPSDO. I installed it after poking around with a multimeter to locate the various connections. I had to add an inverter because the sen

Re: [time-nuts] Housing LPRO and Thunderbolt together

Having over years looked down at Thunderbolt using GPS/Shera/Rb's and Cesium Standards I finally broke down and bought a Tbolt when there where some available for a day for $75. Decided at that price I can not go wrong. Now my counters, Spectrum Analyzer and all Sig. Generators are fed by the

[time-nuts] Fix Trimble Oscillator??

Remove the inverter circuit!  It is not needed and might severely degrade the performance due to temperature issues, etc.   You can specify the Tbolt DAC gain volts/Hz (both positive and negative values can bee used) and save it into EEPROM.  Lady Heather has an oscillator autotune function (&

Re: [time-nuts] Housing LPRO and Thunderbolt together

Hi Pete, As Bob, K6RTM, pointed out the Thunderbolt and the Rubidium are two different animals all together. True, you can treat a Rubidium like it was a normal crystal oscillator, but it is not the same. The Rubidium has a definite life span, the more you run it the less the life. A high qua

Re: [time-nuts] Housing LPRO and Thunderbolt together

Somewhat related to this, someone posted a link for 1U chassis a while back. I thought I saved the link, but can't find it, and since the text of posts can't be searched from the archives, can't find mention of it that way either. If anyone has a decent source for 1U chassis that I could mount a

Re: [time-nuts] Housing LPRO and Thunderbolt together

Brent wrote: Somewhat related to this, someone posted a link for 1U chassis a while back.* * * If anyone has a decent source for 1U chassis that I could mount a pair of tbolts in, I would appreciate it. These are not fancy, or particularly sturdy, but they are serviceable and

Re: [time-nuts] Housing LPRO and Thunderbolt together

On Fri, Apr 22, 2011 at 5:42 PM, brent evers wrote: >...  If anyone has a decent source for 1U chassis > that I could mount a pair of tbolts in, I would appreciate it.  These > were generic 1U rackmount chassis - not 'server' chassis with a bunch > of preplanned holes. Small shop, decent prices

Re: [time-nuts] Housing LPRO and Thunderbolt together

> and since the text of posts can't be searched from the archives Google works. Go to the advanced search page and put >*.febo.com< into the box labeled "Search within a site or domain:", or add >site:*.febo.com< to the main search box. -- These are my opinions, not necessarily my employer's