Re: [time-nuts] Ground loops in measurements?

2013-05-20 Thread engineering
A couple of good references regarding noise minimization in electronic systems are: "Grounding and Shielding: Circuits and Interference" by Ralph Morrison & "Noise Reduction Techniques in Electronic Systems" by Henry W. Ott And the old fallback has been MIL-HDB-419 volumes I and II which mos

[time-nuts] AN/URQ-10A

2013-04-26 Thread engineering
To all, I acquired a AN/URQ-10A frequency standard which appears to have received little or no service since its birth. There are no signs of ever being mounted in its mating rack and the unit has virtually no scratches or wear marks on it. Last night I finally managed to plug it in to s

Re: [time-nuts] HP-8640B

2013-04-25 Thread engineering
If you also Google "8640B manual" several sites will pop up offering free pdf manuals for this unit. Greg "Alf Pousar" wrote: Hello Folks! I turn to you in hope someone can help me. The old but good signal generator 8640B is by Agilent declared obsolete and no support available. The freq

Re: [time-nuts] eBay Contact Congress

2013-04-23 Thread engineering
Hello, Received the same eBay "contact congress" email this morning. A quick header IP check indicated it was sent from a marketing agency server in Germany. I am presently not where this email was received so cannot provide additional details at this time. Regards, Greg -