[time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

Hi, Is there anyone out there clever enough to design me a cesium frequency standard?? There's only two manufacturers that I know of and there's room for another supplier. Also you may be interested to read we have just developed what we believe to be the worlds lowest close-in phase noise

Re: [time-nuts] Modulation on Rb sources

At 9:56 PM -0800 12/5/07, Jeff Mock wrote: I have a couple of Rb sources and went looking for spurs close to the carrier. One was particularly surprising. First is a GPS disciplined Rb oscillator from Berkeley Varitronics. I'm not a big fan of this box, but that's another story. Here's plot of

Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

Why do you say there's room for another supplier? 5 years ago there were 3 suppliers, but Agilent sold out to Symmetricom. What unmet need are you proposing to fill? What is the short term stability (sigma-sub-y-of-tau) of your world class oscillator? Rick Karlquist (RF designer for the 5071A

[time-nuts] Cesiums's

Rick, Your just the person I need Any chance of a cesium before Christmas? Seriously, I do know how complicated they are. Although we supply hydrogen masers, everyone prefers cesium's. Also I hear there's a large inquiry out there for tens of units. Maybe 100's. The goods news on our

Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

Martyn Smith wrote: Hi, Is there anyone out there clever enough to design me a cesium frequency standard?? There's only two manufacturers that I know of and there's room for another supplier. Also you may be interested to read we have just developed what we believe to be the worlds

Re: [time-nuts] Cesium Oscialltors and Low Phase Noise Frequency Standard

It sounds like a really nice oscillator. I'm sure that everyone would love to hear about the challenges and tradeoffs in designing such a high performance quartz oscillator. Do you guys cut your own crystals? How much of the improvement comes from a better SC-cut crystal and how much from

Re: [time-nuts] HP 8566B repair

Jeff Mock wrote: Does anyone have any suggestions or advice about 8566B repair? I've had an 8566B for 7-8 years, it's been a faithful tool, never had a problem with it. It's reasonably clean unit that's never seen a tough life. It sits in the storeroom 90% of the time and is on my bench

Re: [time-nuts] HP 8566B repair

Thanks so much, that's just the encouragement I need to crack open the RF section. I'll take a look at the electrolytic caps you suggest. Assuming that I find something, do you think it's worth replacing other caps in the area figuring that they will also go bad soon enough? jeff John Miles

[time-nuts] HP 8566B repair

Does anyone have any suggestions or advice about 8566B repair? I've had an 8566B for 7-8 years, it's been a faithful tool, never had a problem with it. It's reasonably clean unit that's never seen a tough life. It sits in the storeroom 90% of the time and is on my bench maybe 10% of the

Re: [time-nuts] HP 8566B repair

Never fear. I have seen this a few times, in a couple of 8566Bs that I have owned as well as in some others. The YTO UNLOCK error always seems to come down to an open electrolytic on the YTO driver or pretune DAC boards, under the hinged plastic cover toward the rear of the RF section. Check

Re: [time-nuts] HP 8566B repair

I don't think much of the idea of shotgun-replacing these particular caps. There are a great many of them, they're not *that* unreliable, and unlike the notorious radial-lead tantalums, they tend to fail open, not shorted, so they're unlikely to damage other parts when they fail. On the other