Re: [time-nuts] GPSDO Question
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY If you use the HP Oscillator in your GPSDO, you can then use the 10 MHz output as an external reference for your counter. I picked up a 10 MHz distribution amp and use the same GPSDO to act as external reference on several instruments. Regards, Dick, W1KSZ Tom Clifton wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > I have gathered everything I need to assemble a GPS > Disciplined Oscillator. I have the Brooks Shera > controller assembled, am about 99% done on the linear > power supplies for +/- 5V, 12V supplies and a separate > 24V oven heater supply. The GPS Engine is purring away > happily with a good active antenna - spewing NMEA > data and 1pps to anything willing to listen to it. > > The HP-10811 oven is sitting happily in a working > 5328A counter that I'm willing to cannibalize, but do > I need to? Is there any reason why I shouldn't put the > controler in the 5328 case so I can use it as a > counter as well as timing source? > > 73 - Tom in St. Louis > > > > > Got a little couch potato? > Check out fun summer activities for kids. > http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] E1938A oscillator pinning
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Thank you Bruce Griffiths wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Dick, W1KSZ wrote: >> I have one of these E1938A's. Where is this site you are referring to ? >> >> Thanks, Dick, W1KSZ >> >> > Dick > > E1938A: > http://www.leapsecond.com/museum/e1938a/ > > Z3815A: > http://www.leapsecond.com/museum/z3815a/ > > > Bruce > > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] E1938A oscillator pinning
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I have one of these E1938A's. Where is this site you are referring to ? Thanks, Dick, W1KSZ Bruce Griffiths wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > [EMAIL PROTECTED] wrote: >> Thanks Bruce, >> >> I hooked +12V and +5V up to it, but there is no heater current, and no >> LED's >> go on. There is however a small current into the +12V (90mA) and the >> 10.0MHz >> are being generated with a significant error since the crystal is at room >> temp. >> >> Wonder what I am doing wrong? >> >> bye, >> Said >> >> > Said > > Look at the Z3815A and the E1938A on TVB's website and note the subtle > difference between the E1938A installed in the Z3815A which only has a > single DAC and the other E1938A which appears to have 2 DACs. > > Which E1938A version do you have? > > Bruce > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Building a DC Block Thingy....
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Google a 7805 device and all will be well. 73, Dick, W1KSZ Jason Rabel wrote: > I have a NTS-200 on the way, but one thing about them is their GPS power > output is 12V instead of the usual 5V. I really didn't want to modify the > board any in an irreversible fashion so I was hoping to build an inline > coupler that I could block / sink the 12V current. > > I have a Symmetricom SmartSplitter, and I know that *should* do the job as > long as a lower numbered port is supplying power, but I really don't want to > take the accidental risk of sending 12V to my antenna. > > Doing the math to sink 25ma of current would require a 480 ohm resistor... > That should make the receiver happy and think all is well. But that's as far > as my knowledge goes. What size capacitor would I need to use? Do I need to > add an inductor in series with the resistor? > > > Jason > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] 5 MHz from 10 MHz
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] I have several 10 MHz sources that are locked to GPS. I just acquired an HP 8640B that requires a 5 MHz reference input. Other than building up something, are their any commercial devices that will give me a 5 MHz output from a 10 MHz source ? Thanks, -- 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] NIST frequency doubler
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Where does one find this circuit ? Thanks, Dick, W1KSZ [EMAIL PROTECTED] wrote: > > In a message dated 7/9/2007 01:59:46 Pacific Daylight Time, > [EMAIL PROTECTED] writes: > >> It just an RF bypass capacitor to ground. >> This circuit was embedded in a very small section of a much larger >> paper, so its difficult to find. >> You may even have read the paper and not have noticed the mixer circuit. >> The resistor from the centre tap to ground is selected so that the peak >> drain current is around 28mA or so when the RF is applied > >> RF input ~ 13dBm. >> Input transformer 1:4 turns ratio (or thereabouts) centre tapped secondary. >> Output transformer 2:1 turns ratio (or thereabouts). >> RF bypass capacitor depends on input frequency typically 100nF or so. > >> Bruce > > > Hi Bruce, > > nice circuit. Many questions: > > I wonder how well it works to get a 5MHz source up to 10MHz? > > Also, would you have recommendations on the transformer part numbers? > (MiniCircuits, MaCom, etc)? I think the transformers are probably key to > getting > good phase noise (preventing them from saturating, crosstalk, etc). > > Do you have a suggestion on who makes the best (lowest-noise) JFets? > > Where could we find the original paper's PDF? > > Lastly, how much fundamental attenuation would you expect from such a > circuit? > > Thanks! > Said > > > > ** See what's free at http://www.aol.com. > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Was Tracor 527A manual...now Tracor 527E Manual
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Now if I had the password . 73, Dick, W1KSZ [EMAIL PROTECTED] wrote: > G'Day All, > I have copied a scan of a Tracor 527A manual to Didier Juges's site > ftp.ko4bb.com > It is ~13MB, file name 527A_op_serv_manual.pdf I hope that is OK > Didier? > Regards Scott > P.S. If you need it in a hurry I can mail and/or copy some where else > for you. > > > > Hi Scott and All > > Many thanks Scott for the 527A manual. > > It was only when downloading it that I discovered a 527E manual in my > archives, of similar size, that I must have downloaded some time ago and > forgotten > about. > > I'm now also uploading that one to Didier's site, should be finished in > about 10 minutes, 23:50 UK time. > Both can be found in his upload folder for now. > > regards > > Nigel > GM8PZR > > > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] another Ebay mixup
The answer is simple ... Packing = $$$, right off the bottom line. Since most, if not all electronics on e-Pay is sold "as-is", the seller has no reason to be concerned with the item arriving safely. Only his conscience, which, sadly, in the case of most sellers is non-existent. Don't blame the UPS Store, he only packs with the $$ the seller gives him. 73, Dick, W1KSZ Hal Murray wrote: >> Don't know why it's so difficult for folks to overpack. Worst case, >> one can have it professionally packed at MailBoxes etc. or the like. > > What's their batting average? Do they recognize heavy instruments > and/or do anything special when they see handles? > > > > -- 73, Dick, W1KSZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] How good are mechanical watches
I still have my Bulova Accutron ... Dick S. Hal Murray wrote: >> John (who still wears a mechanical watch) > > Speaking of mechanical watches... > > Does anybody make good ones anymore? Is there a good web page on this area? > > Many many ago, a friend showed me his new toy, an accurate pocket watch. I > forget the brand. I think he said it was from the railroad days. I'll bet > he still has it. > > -- 73, Dick, W1KSZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] VECTRON CO-247 Oscillator
Does anyone have any info (datasheet ?) on this oscillator ? Thanks, Dick, W1KSZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
