Hi I've been buying them for a while. I put in a lot of bids and win very few auctions. Works for me.
Bob On Nov 14, 2010, at 5:23 PM, William H. Fite wrote: > Bob, if you want to let one of those 5370s go, contact me directly: > [email protected] > > > > On Sun, Nov 14, 2010 at 8:39 AM, Bob Camp <[email protected]> wrote: > >> Hi >> >> There have been a number of HP5370's sell for under $250 on the e place >> over the past year. I've bought several of them, none for more than $200. >> The 620 is a rare item. Like a lot of Stanford Research stuff you can get it >> for X any day of the week or X / 5 when a "real" seller shows up. >> >> Bob >> >> >> On Nov 13, 2010, at 11:20 PM, Perry Sandeen wrote: >> >>> List, >>> >>> wrote: > I'm looking for some advice about ways I can compare the >> frequency of two gpsdo's. >>> >>>> Any thoughts as to what could be obtained used for less than 1K that >> would be suited for this type of measurement ? >>> >>> OK, Here’s what I use and why. >>> >>> For a GPS receiver: the Lucent RFTG-M-XO GPS KS-24019 L106A. Google it >> through Sports Lineup. $100 to $125 plus shipping all day long. Sometimes >> even less. I got two over a period of time for $100 each including >> shipping. >>> >>> Why I use them. At the time I bought them the HP Z series were $300 to >> $500. I didn’t want a Trimble from China and they require a PC type power >> supply. If I had known about lady heather at the time I might have bought >> one. The Lucent uses a single 24 volt power supply. Also the Trimble >> oscillators seem to be of a lower quality than the Efratom in the Lucent. >> That said, a U.S. supplier is offering the latest Trimble W/PS for $150. >>> >>> The downside to the Lucent is you have to use the 15 MHz output or hack >> it to get the original 10 MHz before it’s up-converted. For me this hasn’t >> been a problem. >>> >>> For frequency comparisons I have two HP 5370B TIC’s. It will resolve >> time differences of two frequencies down to 10 pico-seconds. As a counter >> it reads 16 digits plus sign. It was the last and most complex counter HP >> made. I paid $450 for one and $100 for the other. (A steal). >>> >>> Downsides. They run extremely hot. One should add some additional >> fan(s). Very heavy. Very large. The 10811 internal oscillator DOES NOT >> have EFC. The best manual setting I could get was within 20 milli-Hz at 15 >> MHz. It took a lot of time. Although both pass self-test, the 100 >> pico-second differential test is off by 880 pico-seconds on one and 670 >> pico-seconds on the other. This would require some serious calibration >> procedures. However the error is constant so all one has to do is to >> remember to add or subtract it depending how you’re measuring. For 25+ year >> old equipment I don’t consider that a bad defect. >>> >>> I have 3 tested Lucent Rubidium RFG-M-RB 15 MHz/10 MHz units. One is >> slightly different but they all work. I had to run them on the bench for >> four to eight weeks before their offsets stabilized. I paid about $100 each >> with shipping. All lucent output connectors are SMA so one needs SMA to BNC >> female adapters. >>> >>> Wrote:> All are in the "sub $300" range on the normal sites. Some are sub >> $100. All are available with GPIB for logging. >>> >>> I guess I’ve been looking in all the wrong places. I watch Ebay prices >> all the time for HP 5370A and B prices. I’ve never seen one for less that >> $500. If there are cheaper places I’d sure like to go looking! >>> >>> SR 620 This is made by Stanford Research. I agree that it is the best. >> It can do Allan variations as well. A current Ebay price: Stanford >> Research SR620-01 Time Interval Counter $3,250. >>> >>> It’s like the old saying: How fast can my car go? Answer: How much >> money do you have? >>> >>> IHTH >>> >>> Perrier >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> 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.
