Re: [time-nuts] Agilent 53220A and TimeLab
Thanks John, that sounds like a great project. I've been wanting to get experience designing circuits for a long time, but have never had a specific project to work towards. When I was a computer programmer I discovered it was a lot easier to learn a new language if you actually had a reason to need it. Thanks again for referencing the pages in the TimeLab manual. I suppose it would do be well to read it a little more thoroughly than I have previously ;) Side note, I checked into the 3120s today at work and you're pretty much spot on. Running about $8k from one local distributor. That may very well be GSA pricing too, I should know by tomorrow. I agree though that concepts and theory of operation are more well understood by actually designing and building things... at least for me. Cheers, -Tim On Wed, Feb 3, 2016 at 1:06 AM, John Miles wrote: > Hi, Timothy -- > > > I've had an Agilent 53220A for some time, and recently discovered the > > wonderful TimeLab software, but I've hit a bit of a snag trying to run > some > > ADEV measurements on a Rb clock. The problem is that the graph doesn't > > line up with the amount of data TimeLab says is collected. I ran an > > acquisition for 100 seconds, but according to the chart it only shows > data > > collected for 20 seconds > > See page 31-32 of the manual ( > http://www.miles.io/TimePod_5330A_user_manual.pdf). I think you'll find > it anticipates that very same question. :) > > > On a side note, I was disappointed to find out that I missed the boat on > > the semi-affordable TimePod. Is there anything remotely in the price rang > > (sub 5K) that can do stability AND phase noise measurements? It seems > like > > the Wavecrest DST "might" be able to, but from what I read in the > time-nuts > > archive I wasn't able to get a clear picture there's an app note > > floating around about making phase noise measurements with it, but > > nothing > > solid. > > The Microsemi 3120A's price has come down a bit over time, so I'd suggest > checking with them to see what the current pricing is like. (Obligatory > disclaimer: I have no current financial/professional involvement with the > 3120A.) I suspect it's still well north of $5K, depending on options, but > I know they've stepped back from the initial prices they were quoting. > > I'd encourage you to build something, though, given that you're not doing > this stuff for your day job. There's a reasonable amount of literature out > there on both quadrature PLLs for PN measurement and the related tight-PLL > topology that's well-suited to stability measurement. They can both return > very high-quality results for very little money, if you're willing to put > in the necessary "sweat equity." This approach is much more educational > than simply throwing money at hardware, and (speaking from experience) more > fun as well. > > -- john, KE5FX > Miles Design LLC > > ___ > 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 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] Glass Envelope Quartz Crystals
Hi Back in the early days of multiplex transmission, frequency division multiplex was king. There were a lot of systems. They used a variety of schemes to pack the baseband signals into sub 2 MHz sort of arrangements. For quite a while the state of the art was to use various low frequency crystals to generate the multitude of careers that spread out from audio up to maybe a MHz or two. As a result of this, there were a *LOT* of crystals made at weird low frequencies. Some of these systems lived on well after the advent of digital multiplex systems. Once you have 400 miles of system A it’s easier to extend it a “few more miles” than to re-do the whole thing. Spares for these systems were made at least into the 1990’s. While these are really cool looking parts (try a strobe on your 1 KHz bar …) they rarely are very stable. They are more interesting as art than as frequency standards. Bob > On Feb 3, 2016, at 2:36 PM, Dave Brown wrote: > > And many of these glass envelope crystals were made on very low frequencies- > I have several below 20 kHz and one as low as 3 kHz in a B7G based envelope > that is 4 inches long. > http://homepages.ihug.co.nz/~tractorb/3k1.JPG > > DaveB, NZ > > - Original Message - From: "Alan Melia" > To: "Discussion of precise time and frequency measurement" > > Sent: Thursday, February 04, 2016 6:30 AM > Subject: Re: [time-nuts] Glass Envelope Quartz Crystals > > >> I think it was unlikely that that it was made "just to see where it would >> come out" That is a flexural bar possibly an NT cut. 100KHz standards were >> commonly made in this format. >> The British GPO had a factory at Mill Hill in N. London making these in >> tube-like (valve in UK) enclosures, IO GT and B7G. I have a number of unit >> saved from the dumpster (skip in the UK).when the unit closed in the early >> 60s. Remember there was a surge in telephones in this era and many of these >> frequencies were for FDM carriers on trunk sytems. This is pre-synthersiser. >> >> Also many special quality tubes were made for VHF in B7G with two or three >> inch wires instead of pins to reduce the socket parasitics. so these were >> probably still around in Russian factories to produce components for the >> "Foxbat" etc. >> >> Alan >> G3NYK >> >> >> - Original Message - From: "Philip Gladstone" >> >> To: >> Sent: Wednesday, February 03, 2016 1:21 PM >> Subject: Re: [time-nuts] Glass Envelope Quartz Crystals >> >> >>> I dug around in my junk box, and found this: >>> >>> https://plus.google.com/+PhilipGladstone/posts/JBNLMSq2rsE?pid=6247050011623528018&oid=115465617973526125523 >>> >>> This is (according to the markings) a 71.137 kHz crystal made in 1948. I >>> suspect that they just measured the crystal after manufacture rather than >>> actually trying to make a 71137Hz crystal >>> >>> After this discussion, I'm feeling the need to fire it up and see whether >>> it still runs, and what the aging has done to the frequency >>> >>> Philip >>> >>> On 03/02/2016 07:11, Bob Camp wrote: Hi There is actually a range of crystals shown in the pictures. The gold plated 5 MHz crystal is probably an overtone part. It could be fairly precise. The 25 MHz part is plated with something like silver. It probably is a *much* lower precision part. There likely are long stories that explain just why this or that package got used in this or that application. Bob > On Feb 2, 2016, at 10:04 PM, Jeremy Nichols wrote: > > The OP's picture looks very much like the crystals that HP's "Frequency > and Time" division in Santa Clara (02 was their division number) used to > manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP > used in the predecessor to the HP-105A (perhaps the 101A). > > Jeremy > > http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html > > > > On 2/2/2016 12:24 PM, Don Latham wrote: >> You have it right, iovane. At the least, they should be protected from >> light, >> thermal radiation, and emf. Won'drous things will happen if the >> crystal and >> its structure are subjected to radiation through the glass. I'd suggest >> a foam >> wrap in a tin can as a minimum. Put the oscillator cat in there too. >> Don >> >> iovane--- via time-nuts >>> I think that these crystals were designed to be placed in an oven, >>> which >>> worked >>> as a shield too. I have a similar crystal made by Racal in the 60's, >>> and in my >>> case it is fitted with the classic octal tube-type plug. It was housed >>> (still >>> is) in a heavy massive shimmering chrome-plated cylindrical brass >>> enclosure, a >>> beauty to see, It was the timebase of a tube-type synthesizer with >>> lots of >>> tubes. Themperature con
Re: [time-nuts] Glass Envelope Quartz Crystals
On 3 February 2016 at 19:41, Tim Shoppa wrote: > Very interesting! Hazarding a guess higher end of a NT-cut? Looks much > like the third from the right here: > http://www.pbgquartz.com/www.pbgquartz.com/images/foto1.jpg I have a GEC 1Kc/s crystal that looks like the third from right. It's a massive slab of quartz - I occasionally wonder about spinning it up to see if the motion's detectable with a bit of crude interferometry, but I have no idea about permitted drive levels and don't want to damage it. It's hard to imagine it would be stable or time-nuts-worthy, but hints would be welcome. Steve ___ 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] Glass Envelope Quartz Crystals
On 02/02/2016 03:24 PM, Don Latham wrote: You have it right, iovane. At the least, they should be protected from light, thermal radiation, and emf. Won'drous things will happen if the crystal and its structure are subjected to radiation through the glass. I'd suggest a foam wrap in a tin can as a minimum. Put the oscillator cat in there too. I have a 100 kHz glass "Crystal Unit" made by G.E.C., type JCF/193 with a serial number and sealed in a valve/tube with seven pins. I removed it from my Eddystone EA12 that I bought from Tom Roberts, G3YTO, SK 1985. It has a black shield with a spring inside at the top so that it grips the base. The valve that produced 100 kHz markers for dial calibration failed and I don't use the EA12 these days. It will be interesting to see how stable it is and what the effect of light and heat on it is when I start experimenting. Ian, G4ICV, AB2GR -- ___ 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] Glass Envelope Quartz Crystals
Very interesting! Hazarding a guess higher end of a NT-cut? Looks much like the third from the right here: http://www.pbgquartz.com/www.pbgquartz.com/images/foto1.jpg Some crystals in this range were used as filters or LO's in telecom SSB-type channel banks (I think that's what the vendor who made that photo, used to specialize in) but I don't know if those were generally NT cut or what. Tim N3QE On Wed, Feb 3, 2016 at 8:21 AM, Philip Gladstone < pjsg-timen...@nospam.gladstonefamily.net> wrote: > I dug around in my junk box, and found this: > > > https://plus.google.com/+PhilipGladstone/posts/JBNLMSq2rsE?pid=6247050011623528018&oid=115465617973526125523 > > This is (according to the markings) a 71.137 kHz crystal made in 1948. I > suspect that they just measured the crystal after manufacture rather than > actually trying to make a 71137Hz crystal > > After this discussion, I'm feeling the need to fire it up and see whether > it still runs, and what the aging has done to the frequency > > Philip > > > On 03/02/2016 07:11, Bob Camp wrote: > >> Hi >> >> There is actually a range of crystals shown in the pictures. The gold >> plated 5 MHz >> crystal is probably an overtone part. It could be fairly precise. The 25 >> MHz part is >> plated with something like silver. It probably is a *much* lower >> precision part. There >> likely are long stories that explain just why this or that package got >> used in this >> or that application. >> >> Bob >> >> On Feb 2, 2016, at 10:04 PM, Jeremy Nichols wrote: >>> >>> The OP's picture looks very much like the crystals that HP's "Frequency >>> and Time" division in Santa Clara (02 was their division number) used to >>> manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP >>> used in the predecessor to the HP-105A (perhaps the 101A). >>> >>> Jeremy >>> >>> >>> http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html >>> >>> >>> >>> On 2/2/2016 12:24 PM, Don Latham wrote: >>> You have it right, iovane. At the least, they should be protected from light, thermal radiation, and emf. Won'drous things will happen if the crystal and its structure are subjected to radiation through the glass. I'd suggest a foam wrap in a tin can as a minimum. Put the oscillator cat in there too. Don iovane--- via time-nuts > I think that these crystals were designed to be placed in an oven, > which > worked > as a shield too. I have a similar crystal made by Racal in the 60's, > and in my > case it is fitted with the classic octal tube-type plug. It was housed > (still > is) in a heavy massive shimmering chrome-plated cylindrical brass > enclosure, a > beauty to see, It was the timebase of a tube-type synthesizer with > lots of > tubes. Themperature control was achieved by means of a mercury > thermometer in > which mercury actuated a contact when reaching a wire crossing the > capillary > tube. > > Antonio I8IOV > > Da: Bob Camp >> Data: 02/02/2016 13.15 >> A: "Discussion of precise time and frequency measurement"< >> time-nuts@febo.com> >> Ogg: Re: [time-nuts] Glass Envelope Quartz Crystals >> >> Hi >> >> Since the 25 MHz crystal has already been soldered into a circuit, >> putting it >> > in a > >> socket is probably not a real good idea. It’s also a leaded part. >> Even with >> > fat pins > >> sockets can be an issue. With wire leads, you are asking for trouble. >> >> Functionally, there is little there is little difference between a >> glass >> > package crystal > >> and a metal package. About the only real one is the obvious - one has >> a metal >> > shield > >> you can (but sometimes don’t) ground. >> >> Bob >> >> >> On Feb 1, 2016, at 9:58 PM, Daniel Watson >>> wrote: >>> >>> Hi, >>> >>> I purchased a pair of interesting glass envelope crystals for a >>> project. >>> Here are some pictures: >>> >>> >>> http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html >>> >>> Does anyone have an idea about what mount/socket I should buy for >>> these? I >>> read a previous thread on the list about Bliley crystals using a B7G >>> mount, >>> but I'm not sure if that type might work here. >>> >>> Also, when building up a circuit to make these oscillate, are there >>> any >>> specific differences about crystals in this package that I should >>> keep in >>> mind? >>> >>> >>> Thanks much, >>> >>> Dan W. >>> >> > > ___ > 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 t
Re: [time-nuts] Glass Envelope Quartz Crystals
And many of these glass envelope crystals were made on very low frequencies- I have several below 20 kHz and one as low as 3 kHz in a B7G based envelope that is 4 inches long. http://homepages.ihug.co.nz/~tractorb/3k1.JPG DaveB, NZ - Original Message - From: "Alan Melia" To: "Discussion of precise time and frequency measurement" Sent: Thursday, February 04, 2016 6:30 AM Subject: Re: [time-nuts] Glass Envelope Quartz Crystals I think it was unlikely that that it was made "just to see where it would come out" That is a flexural bar possibly an NT cut. 100KHz standards were commonly made in this format. The British GPO had a factory at Mill Hill in N. London making these in tube-like (valve in UK) enclosures, IO GT and B7G. I have a number of unit saved from the dumpster (skip in the UK).when the unit closed in the early 60s. Remember there was a surge in telephones in this era and many of these frequencies were for FDM carriers on trunk sytems. This is pre-synthersiser. Also many special quality tubes were made for VHF in B7G with two or three inch wires instead of pins to reduce the socket parasitics. so these were probably still around in Russian factories to produce components for the "Foxbat" etc. Alan G3NYK - Original Message - From: "Philip Gladstone" To: Sent: Wednesday, February 03, 2016 1:21 PM Subject: Re: [time-nuts] Glass Envelope Quartz Crystals I dug around in my junk box, and found this: https://plus.google.com/+PhilipGladstone/posts/JBNLMSq2rsE?pid=6247050011623528018&oid=115465617973526125523 This is (according to the markings) a 71.137 kHz crystal made in 1948. I suspect that they just measured the crystal after manufacture rather than actually trying to make a 71137Hz crystal After this discussion, I'm feeling the need to fire it up and see whether it still runs, and what the aging has done to the frequency Philip On 03/02/2016 07:11, Bob Camp wrote: Hi There is actually a range of crystals shown in the pictures. The gold plated 5 MHz crystal is probably an overtone part. It could be fairly precise. The 25 MHz part is plated with something like silver. It probably is a *much* lower precision part. There likely are long stories that explain just why this or that package got used in this or that application. Bob On Feb 2, 2016, at 10:04 PM, Jeremy Nichols wrote: The OP's picture looks very much like the crystals that HP's "Frequency and Time" division in Santa Clara (02 was their division number) used to manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP used in the predecessor to the HP-105A (perhaps the 101A). Jeremy http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html On 2/2/2016 12:24 PM, Don Latham wrote: You have it right, iovane. At the least, they should be protected from light, thermal radiation, and emf. Won'drous things will happen if the crystal and its structure are subjected to radiation through the glass. I'd suggest a foam wrap in a tin can as a minimum. Put the oscillator cat in there too. Don iovane--- via time-nuts I think that these crystals were designed to be placed in an oven, which worked as a shield too. I have a similar crystal made by Racal in the 60's, and in my case it is fitted with the classic octal tube-type plug. It was housed (still is) in a heavy massive shimmering chrome-plated cylindrical brass enclosure, a beauty to see, It was the timebase of a tube-type synthesizer with lots of tubes. Themperature control was achieved by means of a mercury thermometer in which mercury actuated a contact when reaching a wire crossing the capillary tube. Antonio I8IOV Da: Bob Camp Data: 02/02/2016 13.15 A: "Discussion of precise time and frequency measurement" Ogg: Re: [time-nuts] Glass Envelope Quartz Crystals Hi Since the 25 MHz crystal has already been soldered into a circuit, putting it in a socket is probably not a real good idea. It’s also a leaded part. Even with fat pins sockets can be an issue. With wire leads, you are asking for trouble. Functionally, there is little there is little difference between a glass package crystal and a metal package. About the only real one is the obvious - one has a metal shield you can (but sometimes don’t) ground. Bob On Feb 1, 2016, at 9:58 PM, Daniel Watson wrote: Hi, I purchased a pair of interesting glass envelope crystals for a project. Here are some pictures: http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html Does anyone have an idea about what mount/socket I should buy for these? I read a previous thread on the list about Bliley crystals using a B7G mount, but I'm not sure if that type might work here. Also, when building up a circuit to make these oscillate, are there any specific differences about crystals in this package that I should keep in mind? Thanks much, Dan W.
Re: [time-nuts] Glass Envelope Quartz Crystals
Alan -- I should have checked Google. It turns out that 71.137 kHz was a Decca navigation frequency. Given that the network was being installed in the '40s, it seems to match up with the date on the crystal. Philip http://traktoria.org/files/radio/navigation/Radio_Navigation_Systems_for_Aviation_and_Maritime_use__AGARD-AG-63.pdf has all the details. On 03/02/2016 12:30, Alan Melia wrote: I think it was unlikely that that it was made "just to see where it would come out" That is a flexural bar possibly an NT cut. 100KHz standards were commonly made in this format. The British GPO had a factory at Mill Hill in N. London making these in tube-like (valve in UK) enclosures, IO GT and B7G. I have a number of unit saved from the dumpster (skip in the UK).when the unit closed in the early 60s. Remember there was a surge in telephones in this era and many of these frequencies were for FDM carriers on trunk sytems. This is pre-synthersiser. Also many special quality tubes were made for VHF in B7G with two or three inch wires instead of pins to reduce the socket parasitics. so these were probably still around in Russian factories to produce components for the "Foxbat" etc. Alan G3NYK - Original Message - From: "Philip Gladstone" To: Sent: Wednesday, February 03, 2016 1:21 PM Subject: Re: [time-nuts] Glass Envelope Quartz Crystals I dug around in my junk box, and found this: https://plus.google.com/+PhilipGladstone/posts/JBNLMSq2rsE?pid=6247050011623528018&oid=115465617973526125523 This is (according to the markings) a 71.137 kHz crystal made in 1948. I suspect that they just measured the crystal after manufacture rather than actually trying to make a 71137Hz crystal After this discussion, I'm feeling the need to fire it up and see whether it still runs, and what the aging has done to the frequency Philip On 03/02/2016 07:11, Bob Camp wrote: Hi There is actually a range of crystals shown in the pictures. The gold plated 5 MHz crystal is probably an overtone part. It could be fairly precise. The 25 MHz part is plated with something like silver. It probably is a *much* lower precision part. There likely are long stories that explain just why this or that package got used in this or that application. Bob On Feb 2, 2016, at 10:04 PM, Jeremy Nichols wrote: The OP's picture looks very much like the crystals that HP's "Frequency and Time" division in Santa Clara (02 was their division number) used to manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP used in the predecessor to the HP-105A (perhaps the 101A). Jeremy http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html On 2/2/2016 12:24 PM, Don Latham wrote: You have it right, iovane. At the least, they should be protected from light, thermal radiation, and emf. Won'drous things will happen if the crystal and its structure are subjected to radiation through the glass. I'd suggest a foam wrap in a tin can as a minimum. Put the oscillator cat in there too. Don iovane--- via time-nuts I think that these crystals were designed to be placed in an oven, which worked as a shield too. I have a similar crystal made by Racal in the 60's, and in my case it is fitted with the classic octal tube-type plug. It was housed (still is) in a heavy massive shimmering chrome-plated cylindrical brass enclosure, a beauty to see, It was the timebase of a tube-type synthesizer with lots of tubes. Themperature control was achieved by means of a mercury thermometer in which mercury actuated a contact when reaching a wire crossing the capillary tube. Antonio I8IOV Da: Bob Camp Data: 02/02/2016 13.15 A: "Discussion of precise time and frequency measurement" Ogg: Re: [time-nuts] Glass Envelope Quartz Crystals Hi Since the 25 MHz crystal has already been soldered into a circuit, putting it in a socket is probably not a real good idea. It’s also a leaded part. Even with fat pins sockets can be an issue. With wire leads, you are asking for trouble. Functionally, there is little there is little difference between a glass package crystal and a metal package. About the only real one is the obvious - one has a metal shield you can (but sometimes don’t) ground. Bob On Feb 1, 2016, at 9:58 PM, Daniel Watson wrote: Hi, I purchased a pair of interesting glass envelope crystals for a project. Here are some pictures: http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html Does anyone have an idea about what mount/socket I should buy for these? I read a previous thread on the list about Bliley crystals using a B7G mount, but I'm not sure if that type might work here. Also, when building up a circuit to make these oscillate, are there any specific differences about crystals in this package that I should keep in mind? Thanks much, Dan W. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe,
Re: [time-nuts] Glass Envelope Quartz Crystals
I think it was unlikely that that it was made "just to see where it would come out" That is a flexural bar possibly an NT cut. 100KHz standards were commonly made in this format. The British GPO had a factory at Mill Hill in N. London making these in tube-like (valve in UK) enclosures, IO GT and B7G. I have a number of unit saved from the dumpster (skip in the UK).when the unit closed in the early 60s. Remember there was a surge in telephones in this era and many of these frequencies were for FDM carriers on trunk sytems. This is pre-synthersiser. Also many special quality tubes were made for VHF in B7G with two or three inch wires instead of pins to reduce the socket parasitics. so these were probably still around in Russian factories to produce components for the "Foxbat" etc. Alan G3NYK - Original Message - From: "Philip Gladstone" To: Sent: Wednesday, February 03, 2016 1:21 PM Subject: Re: [time-nuts] Glass Envelope Quartz Crystals I dug around in my junk box, and found this: https://plus.google.com/+PhilipGladstone/posts/JBNLMSq2rsE?pid=6247050011623528018&oid=115465617973526125523 This is (according to the markings) a 71.137 kHz crystal made in 1948. I suspect that they just measured the crystal after manufacture rather than actually trying to make a 71137Hz crystal After this discussion, I'm feeling the need to fire it up and see whether it still runs, and what the aging has done to the frequency Philip On 03/02/2016 07:11, Bob Camp wrote: Hi There is actually a range of crystals shown in the pictures. The gold plated 5 MHz crystal is probably an overtone part. It could be fairly precise. The 25 MHz part is plated with something like silver. It probably is a *much* lower precision part. There likely are long stories that explain just why this or that package got used in this or that application. Bob On Feb 2, 2016, at 10:04 PM, Jeremy Nichols wrote: The OP's picture looks very much like the crystals that HP's "Frequency and Time" division in Santa Clara (02 was their division number) used to manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP used in the predecessor to the HP-105A (perhaps the 101A). Jeremy http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html On 2/2/2016 12:24 PM, Don Latham wrote: You have it right, iovane. At the least, they should be protected from light, thermal radiation, and emf. Won'drous things will happen if the crystal and its structure are subjected to radiation through the glass. I'd suggest a foam wrap in a tin can as a minimum. Put the oscillator cat in there too. Don iovane--- via time-nuts I think that these crystals were designed to be placed in an oven, which worked as a shield too. I have a similar crystal made by Racal in the 60's, and in my case it is fitted with the classic octal tube-type plug. It was housed (still is) in a heavy massive shimmering chrome-plated cylindrical brass enclosure, a beauty to see, It was the timebase of a tube-type synthesizer with lots of tubes. Themperature control was achieved by means of a mercury thermometer in which mercury actuated a contact when reaching a wire crossing the capillary tube. Antonio I8IOV Da: Bob Camp Data: 02/02/2016 13.15 A: "Discussion of precise time and frequency measurement" Ogg: Re: [time-nuts] Glass Envelope Quartz Crystals Hi Since the 25 MHz crystal has already been soldered into a circuit, putting it in a socket is probably not a real good idea. It’s also a leaded part. Even with fat pins sockets can be an issue. With wire leads, you are asking for trouble. Functionally, there is little there is little difference between a glass package crystal and a metal package. About the only real one is the obvious - one has a metal shield you can (but sometimes don’t) ground. Bob On Feb 1, 2016, at 9:58 PM, Daniel Watson wrote: Hi, I purchased a pair of interesting glass envelope crystals for a project. Here are some pictures: http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html Does anyone have an idea about what mount/socket I should buy for these? I read a previous thread on the list about Bliley crystals using a B7G mount, but I'm not sure if that type might work here. Also, when building up a circuit to make these oscillate, are there any specific differences about crystals in this package that I should keep in mind? Thanks much, Dan W. ___ 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 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] Glass Envelope Quartz Crystals
Von: time-nuts [mailto:time-nuts-boun...@febo.com] Im Auftrag von Bob Camp Gesendet: Mittwoch, 3. Februar 2016 13:12 >There likely are long stories that explain just why this or that package got >used in this or that application. The historical reasons for this type of package is more related to the production technology than to a particular application. In the olde days, before cold-welding technology came up, glass-encapsulation was the packaging of choice to achieve high stability crystals. Because of the high temperatures associated with the melting during the sealing, all humidity, moisture and "dirt" was burned away. In addition the vacuum inside contributes for high stability and high Q The sealing of glass tubes was a well-established technology for vacuum tubes, and could be adapted straight-forward by the crystal manufacturers. Therefore most of these tube-style crystal packages had an "Octal" or "Noval" type socket as used for vacuum tubes. To complete the story: Later the all-glass enclosures HC-27 and HC-26 came up, which have the same outer dimensions and pin spacing as the old HC-6/U and HC-18/U metal enclosures. The sealing technology was as follows: There was a ring of Kovar embedded in the upper side of the header. The glass-cover was positioned on top of this Kovar ring. The output power ( around 1 kW) of a RF (e.g. 13.56 MHz) transmitter was inductively coupled through a coil which was arranged around the crystal header, so the Kovar ring was forming the secondary winding of this RF transformer. Through RF induction the Kovar ring was melting and with it the edge of the glass cover and of the header. The whole thing happened under a vacuum bell, and the sealing process was accompanied by water cooling of the pins and parts of the header to avoid overheating of the crystal during the melting process (its temperature must be maintained well below the Curie temperature (573°C). The degree of overheating could be seen afterwards by you measuring the resonance spectrum: At about 1.5 times the nominal frequency you could see resonances from the BT-cut mode, caused by partial twinning of the crystal structure ... With this I will close the crystal history book for today. Best regards Bernd DK1AG ___ 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] Agilent 53220A and TimeLab
Hi Attila, I normally use the HP53132A in Frequency mode with the Timelab. The time interval mode, I know is more accurate but using the 1PPS as input you lost too much resolution. looking : http://www.timeok.it/wp/wp-content/uploads/2015/09/Timeok-Time-and-Frequency-House-Standard-v-2.1.pdf page 8, the noise floor using fmode is around 2.5E-12 at1 sec and 5.2E-14 at 1000Sec. I would like to have around 100 time more resolution capability, in particular, in the 1-1000Sec range and short to long term stability measurement possibility. > How about implementing DMTD using ADCs? You could do something similar > to what the TimePod does using a dual >40Msps ADC to sample both signals > and feed that into a PC for processing. E.g. an AD9248-65 is available for > 40USD, add some 100-200USD for a suitable FPGA board. A small PCB to glue > the ADC and the FPGA board together, a little bit of software writing and > you are done ;-) > > Of course, this would not have the short term stability (aka low noise > floor) > of the TimePod, but beyond a second, it should give you good results. And > should be more than good enough to measure the ADEV of the devices we > usually > deal with. I am not a "Digital Person" and I cannot approach this kind of project I have not this knowledge, so I am looking some "analog" solution or any, ready to use, solution. Thank you for your help, Luciano www.timeok.it Message sent via Atmail Open - http://atmail.org/) On Wed 03/02/16 15:01 , Attila Kinali wrote: > Ciao Luciano, > > On Wed, 03 Feb 2016 13:31:44 +0100 > tim...@timeok.it wrote: > > > Unfortunately it is very difficult to measure the Allan deviation levels > to > > E-14 and beyond. > > I have tried some solutions like Wavecrest and Dual mixer Time Interval > but > > with poor results: > > Do you think this is a general problem of comparing 10MHz standards > or just one of inadequate equipment? > > > Honestly I do not see at present practical solutions and reliable low > cost. > > How about implementing DMTD using ADCs? You could do something similar > to what the TimePod does using a dual >40Msps ADC to sample both signals > and feed that into a PC for processing. E.g. an AD9248-65 is available for > 40USD, add some 100-200USD for a suitable FPGA board. A small PCB to glue > the ADC and the FPGA board together, a little bit of software writing and > you are done ;-) > > Of course, this would not have the short term stability (aka low noise > floor) > of the TimePod, but beyond a second, it should give you good results. And > should be more than good enough to measure the ADEV of the devices we > usually > deal with. > > Attila Kinali > > -- > It is upon moral qualities that a society is ultimately founded. All > the prosperity and technological sophistication in the world is of no > use without that foundation. > -- Miss Matheson, The Diamond Age, Neil Stephenson > > > Message sent via Atmail Open - http://atmail.org/ ___ 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] Agilent 53220A and TimeLab
Ciao Luciano, On Wed, 03 Feb 2016 13:31:44 +0100 tim...@timeok.it wrote: > Unfortunately it is very difficult to measure the Allan deviation levels to > E-14 and beyond. > I have tried some solutions like Wavecrest and Dual mixer Time Interval but > with poor results: Do you think this is a general problem of comparing 10MHz standards or just one of inadequate equipment? > Honestly I do not see at present practical solutions and reliable low cost. How about implementing DMTD using ADCs? You could do something similar to what the TimePod does using a dual >40Msps ADC to sample both signals and feed that into a PC for processing. E.g. an AD9248-65 is available for 40USD, add some 100-200USD for a suitable FPGA board. A small PCB to glue the ADC and the FPGA board together, a little bit of software writing and you are done ;-) Of course, this would not have the short term stability (aka low noise floor) of the TimePod, but beyond a second, it should give you good results. And should be more than good enough to measure the ADEV of the devices we usually deal with. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson ___ 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] Glass Envelope Quartz Crystals
I dug around in my junk box, and found this: https://plus.google.com/+PhilipGladstone/posts/JBNLMSq2rsE?pid=6247050011623528018&oid=115465617973526125523 This is (according to the markings) a 71.137 kHz crystal made in 1948. I suspect that they just measured the crystal after manufacture rather than actually trying to make a 71137Hz crystal After this discussion, I'm feeling the need to fire it up and see whether it still runs, and what the aging has done to the frequency Philip On 03/02/2016 07:11, Bob Camp wrote: Hi There is actually a range of crystals shown in the pictures. The gold plated 5 MHz crystal is probably an overtone part. It could be fairly precise. The 25 MHz part is plated with something like silver. It probably is a *much* lower precision part. There likely are long stories that explain just why this or that package got used in this or that application. Bob On Feb 2, 2016, at 10:04 PM, Jeremy Nichols wrote: The OP's picture looks very much like the crystals that HP's "Frequency and Time" division in Santa Clara (02 was their division number) used to manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP used in the predecessor to the HP-105A (perhaps the 101A). Jeremy http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html On 2/2/2016 12:24 PM, Don Latham wrote: You have it right, iovane. At the least, they should be protected from light, thermal radiation, and emf. Won'drous things will happen if the crystal and its structure are subjected to radiation through the glass. I'd suggest a foam wrap in a tin can as a minimum. Put the oscillator cat in there too. Don iovane--- via time-nuts I think that these crystals were designed to be placed in an oven, which worked as a shield too. I have a similar crystal made by Racal in the 60's, and in my case it is fitted with the classic octal tube-type plug. It was housed (still is) in a heavy massive shimmering chrome-plated cylindrical brass enclosure, a beauty to see, It was the timebase of a tube-type synthesizer with lots of tubes. Themperature control was achieved by means of a mercury thermometer in which mercury actuated a contact when reaching a wire crossing the capillary tube. Antonio I8IOV Da: Bob Camp Data: 02/02/2016 13.15 A: "Discussion of precise time and frequency measurement" Ogg: Re: [time-nuts] Glass Envelope Quartz Crystals Hi Since the 25 MHz crystal has already been soldered into a circuit, putting it in a socket is probably not a real good idea. It’s also a leaded part. Even with fat pins sockets can be an issue. With wire leads, you are asking for trouble. Functionally, there is little there is little difference between a glass package crystal and a metal package. About the only real one is the obvious - one has a metal shield you can (but sometimes don’t) ground. Bob On Feb 1, 2016, at 9:58 PM, Daniel Watson wrote: Hi, I purchased a pair of interesting glass envelope crystals for a project. Here are some pictures: http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html Does anyone have an idea about what mount/socket I should buy for these? I read a previous thread on the list about Bliley crystals using a B7G mount, but I'm not sure if that type might work here. Also, when building up a circuit to make these oscillate, are there any specific differences about crystals in this package that I should keep in mind? Thanks much, Dan W. ___ 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] Glass Envelope Quartz Crystals
Hi There is actually a range of crystals shown in the pictures. The gold plated 5 MHz crystal is probably an overtone part. It could be fairly precise. The 25 MHz part is plated with something like silver. It probably is a *much* lower precision part. There likely are long stories that explain just why this or that package got used in this or that application. Bob > On Feb 2, 2016, at 10:04 PM, Jeremy Nichols wrote: > > The OP's picture looks very much like the crystals that HP's "Frequency and > Time" division in Santa Clara (02 was their division number) used to > manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP used > in the predecessor to the HP-105A (perhaps the 101A). > > Jeremy > > http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html > > > > On 2/2/2016 12:24 PM, Don Latham wrote: >> You have it right, iovane. At the least, they should be protected from light, >> thermal radiation, and emf. Won'drous things will happen if the crystal and >> its structure are subjected to radiation through the glass. I'd suggest a >> foam >> wrap in a tin can as a minimum. Put the oscillator cat in there too. >> Don >> >> iovane--- via time-nuts >>> I think that these crystals were designed to be placed in an oven, which >>> worked >>> as a shield too. I have a similar crystal made by Racal in the 60's, and in >>> my >>> case it is fitted with the classic octal tube-type plug. It was housed >>> (still >>> is) in a heavy massive shimmering chrome-plated cylindrical brass >>> enclosure, a >>> beauty to see, It was the timebase of a tube-type synthesizer with lots of >>> tubes. Themperature control was achieved by means of a mercury thermometer >>> in >>> which mercury actuated a contact when reaching a wire crossing the capillary >>> tube. >>> >>> Antonio I8IOV >>> Da: Bob Camp Data: 02/02/2016 13.15 A: "Discussion of precise time and frequency measurement" Ogg: Re: [time-nuts] Glass Envelope Quartz Crystals Hi Since the 25 MHz crystal has already been soldered into a circuit, putting it >>> in a socket is probably not a real good idea. It’s also a leaded part. Even with >>> fat pins sockets can be an issue. With wire leads, you are asking for trouble. Functionally, there is little there is little difference between a glass >>> package crystal and a metal package. About the only real one is the obvious - one has a metal >>> shield you can (but sometimes don’t) ground. Bob > On Feb 1, 2016, at 9:58 PM, Daniel Watson wrote: > > Hi, > > I purchased a pair of interesting glass envelope crystals for a project. > Here are some pictures: > > http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html > > Does anyone have an idea about what mount/socket I should buy for these? I > read a previous thread on the list about Bliley crystals using a B7G > mount, > but I'm not sure if that type might work here. > > Also, when building up a circuit to make these oscillate, are there any > specific differences about crystals in this package that I should keep in > mind? > > > Thanks much, > > Dan W. >>> >>> ___ >>> 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 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 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] Agilent 53220A and TimeLab
Hi all, On Wed 03/02/16 07:06 , "John Miles" wrote: > Hi, Timothy -- > > > I've had an Agilent 53220A for some time, and recently discovered the > > wonderful TimeLab software, but I've hit a bit of a snag trying to run > some > > ADEV measurements on a Rb clock. The problem is that the graph doesn't > > line up with the amount of data TimeLab says is collected. I ran an > > acquisition for 100 seconds, but according to the chart it only shows > data > > collected for 20 seconds > > See page 31-32 of the manual > (http://www.miles.io/TimePod_5330A_user_manual.pdf). [1] I think you'll > find it anticipates that very same question. :) > > > On a side note, I was disappointed to find out that I missed the boat on > > the semi-affordable TimePod. Is there anything remotely in the price > rang > > (sub 5K) that can do stability AND phase noise measurements? It seems > like > > the Wavecrest DST "might" be able to, but from what I read in the > time-nuts > > archive I wasn't able to get a clear picture there's an app note > > floating around about making phase noise measurements with it, but > > nothing > > solid. > > The Microsemi 3120A's price has come down a bit over time, so I'd suggest > checking with them to see what the current pricing is like. (Obligatory > disclaimer: I have no current financial/professional involvement with the > 3120A.) I suspect it's still well north of $5K, depending on options, but I > know they've stepped back from the initial prices they were quoting. Unfortunately it is very difficult to measure the Allan deviation levels to E-14 and beyond. I have tried some solutions like Wavecrest and Dual mixer Time Interval but with poor results: Wavecrest: He has a good resolution but not exceptional but its major limitation is the number of samples that can handle, he finished his memory and go in times out, so you cannot perform long-term measures. DMTI: Very critical and difficult to manage. The time interval between start and stop is proportional to its noise floor. As this parameter varies during the measurement based on the stability of the two sources, you cannot predict about Noise floor. Others critical conditions are, the temperature, the level of the input signals and the delay lines you have to use for the optimal TI is approximately between 50 and 300 uS. In addition, the phase wrap is still there because the delta-time due to the delta freq. It accumulates with each measurement up to the wrap (depend on the measurement time and Frequency difference). Honestly I do not see at present practical solutions and reliable low cost. Luciano www.timeok.it Message sent via Atmail Open - http://atmail.org/ ___ 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] Glass Envelope Quartz Crystals
Jeremy, do you remember the base that was used on that HP standard crystal-in-glass? I remember similar looking ones (not HP... maybe General Radio? ... probably from the 1960's) fitting into something like the big old bayonet two-pin lamp sockets or even having screw-in candelabra bases. Tim. On Tue, Feb 2, 2016 at 10:04 PM, Jeremy Nichols wrote: > The OP's picture looks very much like the crystals that HP's "Frequency > and Time" division in Santa Clara (02 was their division number) used to > manufacture back in the 1970s. My picture shows a 1 MHz crystal that HP > used in the predecessor to the HP-105A (perhaps the 101A). > > Jeremy > > > http://s323.photobucket.com/user/Jeremy5848/media/Miscellaneous/Crystal_1140587_zps0jxjpoal.jpg.html > > > > > On 2/2/2016 12:24 PM, Don Latham wrote: > >> You have it right, iovane. At the least, they should be protected from >> light, >> thermal radiation, and emf. Won'drous things will happen if the crystal >> and >> its structure are subjected to radiation through the glass. I'd suggest a >> foam >> wrap in a tin can as a minimum. Put the oscillator cat in there too. >> Don >> >> iovane--- via time-nuts >> >>> I think that these crystals were designed to be placed in an oven, which >>> worked >>> as a shield too. I have a similar crystal made by Racal in the 60's, and >>> in my >>> case it is fitted with the classic octal tube-type plug. It was housed >>> (still >>> is) in a heavy massive shimmering chrome-plated cylindrical brass >>> enclosure, a >>> beauty to see, It was the timebase of a tube-type synthesizer with lots >>> of >>> tubes. Themperature control was achieved by means of a mercury >>> thermometer in >>> which mercury actuated a contact when reaching a wire crossing the >>> capillary >>> tube. >>> >>> Antonio I8IOV >>> >>> Da: Bob Camp Data: 02/02/2016 13.15 A: "Discussion of precise time and frequency measurement"< time-nuts@febo.com> Ogg: Re: [time-nuts] Glass Envelope Quartz Crystals Hi Since the 25 MHz crystal has already been soldered into a circuit, putting it >>> in a >>> socket is probably not a real good idea. It’s also a leaded part. Even with >>> fat pins >>> sockets can be an issue. With wire leads, you are asking for trouble. Functionally, there is little there is little difference between a glass >>> package crystal >>> and a metal package. About the only real one is the obvious - one has a metal >>> shield >>> you can (but sometimes don’t) ground. Bob On Feb 1, 2016, at 9:58 PM, Daniel Watson > wrote: > > Hi, > > I purchased a pair of interesting glass envelope crystals for a > project. > Here are some pictures: > > > http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html > > Does anyone have an idea about what mount/socket I should buy for > these? I > read a previous thread on the list about Bliley crystals using a B7G > mount, > but I'm not sure if that type might work here. > > Also, when building up a circuit to make these oscillate, are there any > specific differences about crystals in this package that I should keep > in > mind? > > > Thanks much, > > Dan W. > >>> ___ >>> 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 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 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] Varactor frequency dividers question
>Hi,
>
>I'm looking for a copy of the following document.
>
>"Parametric frequency divider basics. (technical note )"
>
>>From the Microwave Journal Sept 1 1989.
>
>Can anyone help?
>
>Thanks,
>
>Corby
>
>Abstract below.
>
Since the introduction of half octave bandwidth microwave frequency
>dividers and full octave models, parametric frequency dividers have found
>applications in many microwave systems.
>General Description
>The parametric frequency divider is constructed using two varactor diodes
>in a resonant circuit. These diodes are biased slightly forward under
>normal operation. The input signal capacitively is coupled into the
>matching network for the two diodes, where it drives both of the diodes
>in phase. Due to the modulation of the varactor's capacitance at the
>input frequency f, a subharmonic resonance is set up in the diode pair at
>half of the input frequency, f/2. [1] This signal appears across both of
>the varactor diodes, but at 180[degrees] out of phase with each other. It
>is possibly, by using a balun connected to both diodes, to cancel the
>input signal f. However, by observing the signal on one of the diodes in
>the time domain, it can be seen that balancing is unnecessary. This
>signal appears as a negative impulse train with a period of f/2, with a
>positive maximum at the varactor's turn-on threshold voltage of 0.7 V. An
>electrical schematic diagram of a typical divider is shown in Figure 1.
Corby,
If you use LTspice, this may be what you are looking for. The basic
circuit is courtesy Phil Hobbs in the newsgroup
sci.electronics.design.
I improved it by changing varactor D2 to a schottky diode. This
increased the output amplitude slightly and reduced the harmonic
distortion. You can easily change it back to see the original.
I verified it runs on a virgin copy of LTspice. If you have problems,
pleae let me know.
You can download LTspice at http://www.linear.com/designtools/software/
It is free.
Mike
Here is the circuit file:
Version 4
SHEET 1 880 680
WIRE 416 32 272 32
WIRE 464 32 416 32
WIRE 512 32 464 32
WIRE 512 48 512 32
WIRE 272 64 272 32
WIRE 416 96 416 32
WIRE -16 144 -32 144
WIRE 64 144 -16 144
WIRE 192 144 144 144
WIRE 272 144 272 128
WIRE 272 144 192 144
WIRE -32 160 -32 144
WIRE 512 160 512 128
WIRE 512 176 512 160
WIRE 272 192 272 144
WIRE -32 256 -32 240
WIRE 272 272 272 256
WIRE 416 272 416 160
WIRE 416 272 272 272
WIRE 512 272 512 256
WIRE 512 272 416 272
WIRE 416 304 416 272
FLAG 416 304 0
FLAG -32 256 0
FLAG -16 144 Vin
FLAG 192 144 R1D1
FLAG 464 32 Tank
FLAG 512 160 L1R2
SYMBOL varactor 256 64 R0
SYMATTR InstName D1
SYMATTR Value KV1471
SYMBOL cap 400 96 R0
SYMATTR InstName C1
SYMATTR Value 1000p
SYMBOL ind2 496 32 R0
SYMATTR InstName L1
SYMATTR Value 10µ
SYMATTR Type ind
SYMBOL res 48 160 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL voltage -32 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(5 10 3e6 1u)
SYMBOL res 496 160 R0
SYMATTR InstName R2
SYMATTR Value 5R
SYMBOL schottky 288 256 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
TEXT 88 0 Left 2 !.tran 0 30u 25u 10n
TEXT 88 -24 Left 2 ;'Hobbs Halver Improved MRM
Here is the plot file:
[Transient Analysis]
{
Npanes: 4
{
traces: 1 {524291,0,"V(tank)"}
X: ('µ',1,0,5e-007,5e-006)
Y[0]: (' ',1,-1,0.2,1)
Y[1]: ('_',0,1e+308,0,-1e+308)
Volts: (' ',0,0,1,-1,0.2,1)
Log: 0 0 0
GridStyle: 1
},
{
traces: 2 {524290,0,"V(vin)"} {524294,0,"V(r1d1)"}
X: ('µ',1,0,5e-007,5e-006)
Y[0]: (' ',0,-6,2,16)
Y[1]: ('_',0,1e+308,0,-1e+308)
Volts: (' ',0,0,0,-6,2,16)
Log: 0 0 0
GridStyle: 1
},
{
traces: 1 {34603013,0,"I(D2)"}
X: ('µ',1,0,5e-007,5e-006)
Y[0]: ('m',0,-0.005,0.005,0.05)
Y[1]: ('_',0,1e+308,0,-1e+308)
Amps: ('m',0,0,0,-0.005,0.005,0.05)
Log: 0 0 0
GridStyle: 1
},
{
traces: 2 {34603012,0,"I(D1)"} {34603015,0,"I(L1)"}
X: ('µ',1,0,5e-007,5e-006)
Y[0]: ('m',0,-0.028,0.004,0.016)
Y[1]: ('_',0,1e+308,0,-1e+308)
Amps: ('m',0,0,0,-0.028,0.004,0.016)
Log: 0 0 0
GridStyle: 1
}
}
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