Re: [time-nuts] ThunderBolt Display - Update
Hi Adam, If you do not normally monitor this email reflector or contribute to it, why are you using it it promote your commecial product? Are you going to make the circuit and code (or programmed MCUs) available to list members? Robert G8RPI. From: Adam Maurer m...@vklogger.com To: time-nuts@febo.com Sent: Thursday, 12 September 2013, 6:56 Subject: [time-nuts] ThunderBolt Display - Update Hello all An update: ThunderBolt Display started shipping over a week ago. 31 out the 50 have already been sold. I have made a video on the display, and you can see a working example here: http://www.youtube.com/watch?v=BSSZ6BcggBo Any new orders for the “jumbo” sized green and standard sized inverted blue variants will incur a 2 week wait, as these LCDs are only ordered in as-required. I do have a number of standard sized green units available for immediate shipping though on a first-in basis. I am away for 3 weeks in October, so if you want a display sooner than later, you should consider placing an order in the next few days, as it take 2 weeks for the LCDs to arrive. For more information of this device, please refer to: http://vk4ghz.com/thunderbolt-display/ You will find the latest revision of User Guide and Tech Supplement PDFs available as well. PayPal is welcome on the proviso I receive the full amount and you take care of any PayPal fees, if applicable. (This changes from one region to another) One way to avoid fees is to make sure your PayPal account has funds in it, and never draw upon other accounts (especially a credit card). Once these are gone, they are gone, and 130 units will be out there in 12 countries (so far). I do not normally monitor this email reflector, so please email me directly, if you want to obtain a ThunderBolt Display. Cheers, Adam, VK4GHZ ___ 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] ThunderBolt Display - Update
Well Robert, In his Youtube video he says it is fully assembled, so no code, schematics or programmed cpu would be forthcoming is how I would interpret it. Up Shot is this is just shameless promotion. From my 99% complete Timenuts list database of saved messages going back to Jan 2006, his first appearance on the list was last year on Oct 3, 2012. This is his third message to the list with all three messages being a sales pitch for his product. It certainly seems to be a one-way gratuitous relationship to say the least. I don't mind people talking about, describing and offering their efforts to the list. But, I do mind when it seems that is the only purpose of their involvement. So, I would vote to have him removed from the list. BillWB6BNQ Robert Atkinson wrote: Hi Adam, If you do not normally monitor this email reflector or contribute to it, why are you using it it promote your commecial product? Are you going to make the circuit and code (or programmed MCUs) available to list members?  Robert G8RPI. From: Adam Maurer m...@vklogger.com To: time-nuts@febo.com Sent: Thursday, 12 September 2013, 6:56 Subject: [time-nuts] ThunderBolt Display - Update Hello all An update: ThunderBolt Display started shipping over a week ago. 31 out the 50 have already been sold. I have made a video on the display, and you can see a working example here: http://www.youtube.com/watch?v=BSSZ6BcggBo Any new orders for the “jumbo� sized green and standard sized inverted blue variants will incur a 2 week wait, as these LCDs are only ordered in as-required. I do have a number of standard sized green units available for immediate shipping though on a first-in basis. I am away for 3 weeks in October, so if you want a display sooner than later, you should consider placing an order in the next few days, as it take 2 weeks for the LCDs to arrive. For more information of this device, please refer to: http://vk4ghz.com/thunderbolt-display/ You will find the latest revision of User Guide and Tech Supplement PDFs available as well. PayPal is welcome on the proviso I receive the full amount and you take care of any PayPal fees, if applicable. (This changes from one region to another) One way to avoid fees is to make sure your PayPal account has funds in it, and never draw upon other accounts (especially a credit card). Once these are gone, they are gone, and 130 units will be out there in 12 countries (so far). I do not normally monitor this email reflector, so please email me directly, if you want to obtain a ThunderBolt Display. Cheers, Adam, VK4GHZ ___ 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] TBolt temperature sensor
On Wed, 11 Sep 2013 17:20:07 -0700, Arthur Dent wrote: Didier Juges shalimr9 at gmail.com Wed Sep 11 12:24:51 EDT 2013 With all that discussion about the old temperature sensor in the TBolt no longer being available,... Actually I've bought all mine on Ebay and they are still available from the same seller plus others have some of the old revisions as well. It looks like the seller I used has over 500 units left. These are Rev C2 chips. The 3rd line of characters on the chip end with C2. The Rev D will work as well but do not use the Rev E chips because that's where the problem started to appear. Check: http://www.ebay.com/itm/140376728803 Item # 120552309518 appear to be Rev C2 chips as well. -Arthur Nice find Arthur ... I was searching for those , but missed them. Seller petlor , is/was actually posting that he had a reel of these on volt-nuts. He's also the guy who sold those PLETRONIC 26Mhz OCXO's with 100ppb stability (seems to be sold out). CFO ___ 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] New NTBW50AA
Hi As you do these surveys, write down the results. You probably will do several surveys on each antenna location before you are done. Looking at the variation between the results will give you an idea of what's going on. Bob On Sep 11, 2013, at 9:48 PM, quartz55 quart...@hughes.net wrote: I ordered a couple of the temp chips, but it's going to be low on the list of priorities. Tomorrow I'll add another 30' of cable and mount the antenna on the kitchen vent which is right on the south end of the house above the deck, lower but southeast from the beams by 25' or so. I think that's about as good as I can do unless I put up a tower to get above everything and that's not going to happen. I broke a chip inductor in the TS-2000 trying to install the XRef today, so I have to wait a few days until I get some new parts in. I can do a 24 hour precision survey in the meantime. I had to get the headband magnifier out to work on this thing, the board is only 1.25 x 0 .4. The chip inductor I broke is only about a 2mm cube. I got it off the 2000 board OK, I broke the track off the chip trying to solder a wire on one end. Next time I'm going to solder it and then glue it. http://i251.photobucket.com/albums/gg287/DogTi/time/XRef_zps74f23696.jpg I've got about 2 acres of grass to cut and need to put the sickle bar on the JD and go out and kill a few stink bugs in this heat. Dave N3DT ___ 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] New NTBW50AA
Will too long a cable run or too many connectors (2) result in antenna open? When I added the last 50' of cable that's what I got. I measure 5V at the end of the cable run though. Maybe some de-ox in the connectors will help? I can also go get a single long run instead of piecing it together. I'll try a few things before heading into town. Dave ___ 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] TBolt temperature sensor
On Sep 12, 2013, at 3:10 AM, cfo xne...@luna.dyndns.dk wrote: On Wed, 11 Sep 2013 17:20:07 -0700, Arthur Dent wrote: Didier Juges shalimr9 at gmail.com Wed Sep 11 12:24:51 EDT 2013 With all that discussion about the old temperature sensor in the TBolt no longer being available,... Actually I've bought all mine on Ebay and they are still available from the same seller plus others have some of the old revisions as well. It looks like the seller I used has over 500 units left. These are Rev C2 chips. The 3rd line of characters on the chip end with C2. The Rev D will work as well but do not use the Rev E chips because that's where the problem started to appear. Check: http://www.ebay.com/itm/140376728803 Item # 120552309518 appear to be Rev C2 chips as well. -Arthur Nice find Arthur ... I was searching for those , but missed them. Seller petlor , is/was actually posting that he had a reel of these on volt-nuts. He's also the guy who sold those PLETRONIC 26Mhz OCXO's with 100ppb stability (seems to be sold out). CFO Hello, folks. Yes, I've got a reel of the C2 DS1620 chips. Alas, I've sold out of the 26MHz OCXOs. -Pete ___ 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] New NTBW50AA
OK, I cleaned up the connectors and it's working again at the new location. As soon as I get into town, I'll get some new coax. Dave ___ 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] FE-5680A Voltage?
I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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] ThunderBolt Display - Update
My test for this kind of thing is: Would it be OK if a frequent contributor to the list had posted the same information?. I.e. is the information of interest to the list? In this case, I'd say yes and I have no problem with it being posted here. If he posted the same information every week, it would be a different matter. Then it would be looking mighty spammy. This product? I looked at it and decided it was too expensive for my taste. I'll stick with LH. As for removing anyone from an email list - pointless IMO. The really obnoxious ones come right back with a different email address and you end up playing a game of whack-a-mole. If you don't want to hear from this guy, just set up a filter to trash his emails. On Thu, Sep 12, 2013 at 12:09 AM, wb6bnq wb6...@cox.net wrote: Well Robert, In his Youtube video he says it is fully assembled, so no code, schematics or programmed cpu would be forthcoming is how I would interpret it. Up Shot is this is just shameless promotion. From my 99% complete Timenuts list database of saved messages going back to Jan 2006, his first appearance on the list was last year on Oct 3, 2012. This is his third message to the list with all three messages being a sales pitch for his product. It certainly seems to be a one-way gratuitous relationship to say the least. I don't mind people talking about, describing and offering their efforts to the list. But, I do mind when it seems that is the only purpose of their involvement. So, I would vote to have him removed from the list. BillWB6BNQ Robert Atkinson wrote: Hi Adam, If you do not normally monitor this email reflector or contribute to it, why are you using it it promote your commecial product? Are you going to make the circuit and code (or programmed MCUs) available to list members?  Robert G8RPI. __**__ From: Adam Maurer m...@vklogger.com To: time-nuts@febo.com Sent: Thursday, 12 September 2013, 6:56 Subject: [time-nuts] ThunderBolt Display - Update Hello all An update: ThunderBolt Display started shipping over a week ago. 31 out the 50 have already been sold. I have made a video on the display, and you can see a working example here: http://www.youtube.com/watch?**v=BSSZ6BcggBohttp://www.youtube.com/watch?v=BSSZ6BcggBo Any new orders for the “jumbo†sized green and standard sized inverted blue variants will incur a 2 week wait, as these LCDs are only ordered in as-required. I do have a number of standard sized green units available for immediate shipping though on a first-in basis. I am away for 3 weeks in October, so if you want a display sooner than later, you should consider placing an order in the next few days, as it take 2 weeks for the LCDs to arrive. For more information of this device, please refer to: http://vk4ghz.com/thunderbolt-**display/http://vk4ghz.com/thunderbolt-display/ You will find the latest revision of User Guide and Tech Supplement PDFs available as well. PayPal is welcome on the proviso I receive the full amount and you take care of any PayPal fees, if applicable. (This changes from one region to another) One way to avoid fees is to make sure your PayPal account has funds in it, and never draw upon other accounts (especially a credit card). Once these are gone, they are gone, and 130 units will be out there in 12 countries (so far). I do not normally monitor this email reflector, so please email me directly, if you want to obtain a ThunderBolt Display. Cheers, Adam, VK4GHZ __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://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-nutshttps://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] ThunderBolt Display - Update
Hi Adam, I have copied this to our outmoded reflector. At least it's low noise and high quality. Sorry but dispite having been a licenced amateur for 35 years, I don't meet your 55+ demographic. I am aware that amateur radio has an aging demographic. That is why I have tutored for the UK licence for 30 years with student ages as low as 10. If you paid $3k for 50 double sided PTH PCBs you need to find a new supplier. I HAVE invested my own money in group projects (not time nuts), in one case an PIC driven LCD display add on for an instrument. I was able to sell these on ebay for $75 and to list/group members for $50. Circuit, source code and Hex file are published and freely available. I also supplied programmed PICs on request. So you are wrong in your statement I seriously doubt somebody like you would (invest in making up kits for a group. I do value my own time which is why I don't waste it on email forums full of people who have lots of opinion but no knowledge. You are correct, I don't contribute much to Time Nuts, I'm here to learn. I have contributed the odd manual PDF (originals purchased and scanned by myself) and some bits and pieces to members off-list. I also sell support software on PROM for other equipment, again at discount to relevant list members and with full details available. Many people do prefer to pay me to program devices, but at least I give them the option and assistance to do it themselves. Don't know what you typed into google, but when I put g8rpi in the third item was an open design for a low noise high voltage power supply of mine. You don't have to waffle on on youtube to contribute! You seem very fond of your voice and face. You imply your display is not a commercial product. I guess its not as it does not appear to comply with C-Tick, FCC or CE requirements :-) I'm aware of the time and effort required to make webpages, I've had formal training on the subject. I don't have a webpage, I contribute directly to specific groups. I don't need to boost my ego online. Your main website looks like a shop to me. Your other webpage http://www.qsl.net/vk4cp/ is interesting Your other product the Icom Multi-send looks a great design, or not. $79 for a PIC 3 Sil relay a few connectors and an undrilled case. On your display, why no circuit? looking at the pictures it has TWO 28 pin Microchip devices. If these are both MCUs I don't think much of your coding skills My display used a single 14 pin PIC. And a rotary SWITCH for mode selection, how quaint and old fashioned. Also why the 3.3V regulator? You claim 0.02V accuracy. Really? I see no voltage reference and if you are using the PICs internal ADC thats only 10 bits so about 0.015V resolution for 0-15V input. With no other errors that's 0.03V (+_1 LSB) at best. I guess you could have a Vref and offset circuit on the other side of the PCB though. Couldn't you have included your commander functionaliy? This would save users from the messing about with programmers that you seem to think they hate (yes I know you said you have supplied programmed chips). Don't know what problem you have with engineers, without them you would not have much equipment. For the record I'm a Chartered Engineer, Member of the Royal Aeronautical Society. I've been a licenced aircraft engineer for 30 years and currently design avionics and systems. That includes work on VH aircraft, this grumpy old engineer may have designed a critical part on the next aircraft you fly on! I did not initiate a personal attack on somebody, nor did I say that you do not contribute anything (I said you did not contribute to the Time nuts list, by your own admission you don't). I asked three questions. Obviously these touched a nerve. G'day, Robert Atkinson CEng MRAeS G8RPI. From: Adam Maurer m...@vklogger.com To: Robert Atkinson robert8...@yahoo.co.uk Sent: Thursday, 12 September 2013, 13:13 Subject: Re: [time-nuts] ThunderBolt Display - Update Robert, I don’t bother with email reflectors, because they are too last century. email reflectors are ok if you are 55+, but they do not do anything positive to engage the much needed younger demographic into ham radio. In case you haven’t noticed, ham radio is literally dying of old age. Do you honestly think younger people with smartphone these can get interested in these 1990’s text based email reflectors? They want something more engaging these days. I’m sorry (for you) that your demographic fails to appreciate this. I posted about the display because it was suggested by another ham (who is a timenuts member) that I might be able to help others with a solution. Quite a few timenuts members now have this display, and they absolutely like it. The fact that you have this expectation that everything will be served on a silver platter for nothing, and obviously place ZERO value on your own time to develop something like
Re: [time-nuts] ThunderBolt Display - Update
Oh dear, was it something you said? In a message dated 12/09/2013 21:01:42 GMT Daylight Time, robert8...@yahoo.co.uk writes: Hi Adam, I have copied this to our outmoded reflector. At least it's low noise and high quality. Sorry but dispite having been a licenced amateur for 35 years, I don't meet your 55+ demographic. I am aware that amateur radio has an aging demographic. That is why I have tutored for the UK licence for 30 years with student ages as low as 10. If you paid $3k for 50 double sided PTH PCBs you need to find a new supplier. I HAVE invested my own money in group projects (not time nuts), in one case an PIC driven LCD display add on for an instrument. I was able to sell these on ebay for $75 and to list/group members for $50. Circuit, source code and Hex file are published and freely available. I also supplied programmed PICs on request. So you are wrong in your statement I seriously doubt somebody like you would (invest in making up kits for a group. I do value my own time which is why I don't waste it on email forums full of people who have lots of opinion but no knowledge. You are correct, I don't contribute much to Time Nuts, I'm here to learn. I have contributed the odd manual PDF (originals purchased and scanned by myself) and some bits and pieces to members off-list. I also sell support software on PROM for other equipment, again at discount to relevant list members and with full details available. Many people do prefer to pay me to program devices, but at least I give them the option and assistance to do it themselves. Don't know what you typed into google, but when I put g8rpi in the third item was an open design for a low noise high voltage power supply of mine. You don't have to waffle on on youtube to contribute! You seem very fond of your voice and face. You imply your display is not a commercial product. I guess its not as it does not appear to comply with C-Tick, FCC or CE requirements :-) I'm aware of the time and effort required to make webpages, I've had formal training on the subject. I don't have a webpage, I contribute directly to specific groups. I don't need to boost my ego online. Your main website looks like a shop to me. Your other webpage http://www.qsl.net/vk4cp/ is interesting Your other product the Icom Multi-send looks a great design, or not. $79 for a PIC 3 Sil relay a few connectors and an undrilled case. On your display, why no circuit? looking at the pictures it has TWO 28 pin Microchip devices. If these are both MCUs I don't think much of your coding skills My display used a single 14 pin PIC. And a rotary SWITCH for mode selection, how quaint and old fashioned. Also why the 3.3V regulator? You claim 0.02V accuracy. Really? I see no voltage reference and if you are using the PICs internal ADC thats only 10 bits so about 0.015V resolution for 0-15V input. With no other errors that's 0.03V (+_1 LSB) at best. I guess you could have a Vref and offset circuit on the other side of the PCB though. Couldn't you have included your commander functionaliy? This would save users from the messing about with programmers that you seem to think they hate (yes I know you said you have supplied programmed chips). Don't know what problem you have with engineers, without them you would not have much equipment. For the record I'm a Chartered Engineer, Member of the Royal Aeronautical Society. I've been a licenced aircraft engineer for 30 years and currently design avionics and systems. That includes work on VH aircraft, this grumpy old engineer may have designed a critical part on the next aircraft you fly on! I did not initiate a personal attack on somebody, nor did I say that you do not contribute anything (I said you did not contribute to the Time nuts list, by your own admission you don't). I asked three questions. Obviously these touched a nerve. G'day, Robert Atkinson CEng MRAeS G8RPI. From: Adam Maurer m...@vklogger.com To: Robert Atkinson robert8...@yahoo.co.uk Sent: Thursday, 12 September 2013, 13:13 Subject: Re: [time-nuts] ThunderBolt Display - Update Robert, I don’t bother with email reflectors, because they are too last century. email reflectors are ok if you are 55+, but they do not do anything positive to engage the much needed younger demographic into ham radio. In case you haven’t noticed, ham radio is literally dying of old age. Do you honestly think younger people with smartphone these can get interested in these 1990’s text based email reflectors? They want something more engaging these days. I’m sorry (for you) that your demographic fails to appreciate this. I posted about the display because it was suggested by another ham (who is a timenuts member) that I might be able to help others with a solution. Quite a few timenuts members now have this display, and they
Re: [time-nuts] FE-5680A Voltage?
Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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] A day gone awry...
Actually, another expression of McManus' sequential vortex, best expressed by the folksong the bucket's got a hole in it. All these are corollaries to Murphy's Law of Universal Bustedness. Don Magnus Danielson On 09/09/2013 11:31 PM, Ed Palmer wrote: It looks like The Conservation of Bustedness came from Usenet. http://rec.crafts.metalworking.narkive.com/66UwVxf4/conservation-of-bustedness But doesn't entropy mean that the amount of Bustedness in the universe keeps increasing? Hell, I might as well quit. I can't win! Well, the trick is having it get the hell out of YOUR house. With enough persistence you can lower the bustiness in your lab as it moves to other random places. Things will go wrong in your lab every once in a while. Turns out that bustiness cloggs together, so you will have to push it away for a long time until it cloggs elsewhere and you push it away at higher rate than you receive it new. Also remember that Kilroy was here. Cheers, Magnus ___ 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. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.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.
Re: [time-nuts] FE-5680A Voltage?
A good supply is desirable wall warts aren't. Enjoy your new Rb Regards Paul WB8TSL On Thu, Sep 12, 2013 at 6:01 PM, Bob Stewart b...@evoria.net wrote: Thanks Bob. I looked at the datasheet again and found that they do like 15-18. Unfortunately my 18V supply is a wallwart that supplies 22.5-18V, 2.0-2.5A. By the ordering, I assume that means it's load dependent. So, I guess I'll find some Plan B. Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 4:52 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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. ___ 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] A day gone awry...
On 09/09/2013 11:31 PM, Ed Palmer wrote: It looks like The Conservation of Bustedness came from Usenet. http://rec.crafts.metalworking.narkive.com/66UwVxf4/conservation-of-bustedness But doesn't entropy mean that the amount of Bustedness in the universe keeps increasing? Hell, I might as well quit. I can't win! Well, the trick is having it get the hell out of YOUR house. With enough persistence you can lower the bustiness in your lab as it moves to other random places. Things will go wrong in your lab every once in a while. Turns out that bustiness cloggs together, so you will have to push it away for a long time until it cloggs elsewhere and you push it away at higher rate than you receive it new. Also remember that Kilroy was here. Cheers, Magnus ___ 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] New NTBW50AA
Hi Looks like RG-6 Quad Shield is about $50 for a 500' spool at the local big box stores. Bob On Sep 12, 2013, at 10:10 AM, quartz55 quart...@hughes.net wrote: OK, I cleaned up the connectors and it's working again at the new location. As soon as I get into town, I'll get some new coax. Dave ___ 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] FE-5680A Voltage?
Thanks Bob. I looked at the datasheet again and found that they do like 15-18. Unfortunately my 18V supply is a wallwart that supplies 22.5-18V, 2.0-2.5A. By the ordering, I assume that means it's load dependent. So, I guess I'll find some Plan B. Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 4:52 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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] A day gone awry...
I have discovered a possible offshoot of The Conservation of Bustedness It's the more you clean up the less can you find ): -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Don Latham Sent: Friday, 13 September 2013 8:21 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] A day gone awry... Actually, another expression of McManus' sequential vortex, best expressed by the folksong the bucket's got a hole in it. All these are corollaries to Murphy's Law of Universal Bustedness. Don Magnus Danielson On 09/09/2013 11:31 PM, Ed Palmer wrote: It looks like The Conservation of Bustedness came from Usenet. http://rec.crafts.metalworking.narkive.com/66UwVxf4/conservation-of-b ustedness But doesn't entropy mean that the amount of Bustedness in the universe keeps increasing? Hell, I might as well quit. I can't win! Well, the trick is having it get the hell out of YOUR house. With enough persistence you can lower the bustiness in your lab as it moves to other random places. Things will go wrong in your lab every once in a while. Turns out that bustiness cloggs together, so you will have to push it away for a long time until it cloggs elsewhere and you push it away at higher rate than you receive it new. Also remember that Kilroy was here. Cheers, Magnus ___ 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. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.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. ___ 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] ThunderBolt Display - Update
What makes Ham Radio and the Time Nuts site successful is the comeradery and respect we feel for those with a mutual interest. Time Nuts allows everyone novice to industry professionals in the Time and Frequency community to freely exchange ideas, and perhaps more importantly meet others with a common passion. I have already meet people on this site that have developed into friendships that I will value for the rest of my life. Lets respect those loft ideals of those who created this irreplaceable resource. I look forward to this site continuing to be a place I go for both knowledge and enjoyment. In addition I enjoy seeing new products that may be of interest to us Nuts like the Time Pod and these TB displays, but perhaps an additional link where everyone from individual inventors to giants like Agilent could present TF products and post research papers would be a cool idea and perhaps lead to a revenue stream that could help fund the site to insure it will be here for generations to come. So lets say Agilent shows off the New 53230A, we could then post comments on our impressions of it strengths and weaknesses. Thanks again to all that contribute on this site. Best Wishes; Thomas Knox From: gandal...@aol.com Date: Thu, 12 Sep 2013 17:12:48 -0400 To: time-nuts@febo.com Subject: Re: [time-nuts] ThunderBolt Display - Update Oh dear, was it something you said? In a message dated 12/09/2013 21:01:42 GMT Daylight Time, robert8...@yahoo.co.uk writes: Hi Adam, I have copied this to our outmoded reflector. At least it's low noise and high quality. Sorry but dispite having been a licenced amateur for 35 years, I don't meet your 55+ demographic. I am aware that amateur radio has an aging demographic. That is why I have tutored for the UK licence for 30 years with student ages as low as 10. If you paid $3k for 50 double sided PTH PCBs you need to find a new supplier. I HAVE invested my own money in group projects (not time nuts), in one case an PIC driven LCD display add on for an instrument. I was able to sell these on ebay for $75 and to list/group members for $50. Circuit, source code and Hex file are published and freely available. I also supplied programmed PICs on request. So you are wrong in your statement I seriously doubt somebody like you would (invest in making up kits for a group. I do value my own time which is why I don't waste it on email forums full of people who have lots of opinion but no knowledge. You are correct, I don't contribute much to Time Nuts, I'm here to learn. I have contributed the odd manual PDF (originals purchased and scanned by myself) and some bits and pieces to members off-list. I also sell support software on PROM for other equipment, again at discount to relevant list members and with full details available. Many people do prefer to pay me to program devices, but at least I give them the option and assistance to do it themselves. Don't know what you typed into google, but when I put g8rpi in the third item was an open design for a low noise high voltage power supply of mine. You don't have to waffle on on youtube to contribute! You seem very fond of your voice and face. You imply your display is not a commercial product. I guess its not as it does not appear to comply with C-Tick, FCC or CE requirements :-) I'm aware of the time and effort required to make webpages, I've had formal training on the subject. I don't have a webpage, I contribute directly to specific groups. I don't need to boost my ego online. Your main website looks like a shop to me. Your other webpage http://www.qsl.net/vk4cp/ is interesting Your other product the Icom Multi-send looks a great design, or not. $79 for a PIC 3 Sil relay a few connectors and an undrilled case. On your display, why no circuit? looking at the pictures it has TWO 28 pin Microchip devices. If these are both MCUs I don't think much of your coding skills My display used a single 14 pin PIC. And a rotary SWITCH for mode selection, how quaint and old fashioned. Also why the 3.3V regulator? You claim 0.02V accuracy. Really? I see no voltage reference and if you are using the PICs internal ADC thats only 10 bits so about 0.015V resolution for 0-15V input. With no other errors that's 0.03V (+_1 LSB) at best. I guess you could have a Vref and offset circuit on the other side of the PCB though. Couldn't you have included your commander functionaliy? This would save users from the messing about with programmers that you seem to think they hate (yes I know you said you have supplied programmed chips). Don't know what problem you have with engineers, without them you would not have much equipment. For the record I'm a Chartered Engineer, Member of the Royal Aeronautical Society. I've been a licenced aircraft engineer for 30
Re: [time-nuts] FE-5680A Voltage?
Thanks Paul. I remember when I joined this group a few weeks(?) ago I was just looking for some cheap way to improve the accuracy of my counter. So I decided to build a cheap, entry level GSPDO. And I bought a 3456A because I didn't understand my code had a positive feedback loop.. And I got a 5335A. And I spent many many hours turning Bert's FLL into a PLL. And now I'm getting a Rb standard as a check for the code I'm perfecting for my GPSDO. You guys were right. This time stuff is more addictive than crack. I just tell everyone I'm building a time machine. =) Bob From: paul swed paulsw...@gmail.com To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 5:31 PM Subject: Re: [time-nuts] FE-5680A Voltage? A good supply is desirable wall warts aren't. Enjoy your new Rb Regards Paul WB8TSL On Thu, Sep 12, 2013 at 6:01 PM, Bob Stewart b...@evoria.net wrote: Thanks Bob. I looked at the datasheet again and found that they do like 15-18. Unfortunately my 18V supply is a wallwart that supplies 22.5-18V, 2.0-2.5A. By the ordering, I assume that means it's load dependent. So, I guess I'll find some Plan B. Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 4:52 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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. ___ 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] FE-5680A Voltage?
So true in all aspects. On Thu, Sep 12, 2013 at 6:43 PM, Bob Stewart b...@evoria.net wrote: Thanks Paul. I remember when I joined this group a few weeks(?) ago I was just looking for some cheap way to improve the accuracy of my counter. So I decided to build a cheap, entry level GSPDO. And I bought a 3456A because I didn't understand my code had a positive feedback loop.. And I got a 5335A. And I spent many many hours turning Bert's FLL into a PLL. And now I'm getting a Rb standard as a check for the code I'm perfecting for my GPSDO. You guys were right. This time stuff is more addictive than crack. I just tell everyone I'm building a time machine. =) Bob From: paul swed paulsw...@gmail.com To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 5:31 PM Subject: Re: [time-nuts] FE-5680A Voltage? A good supply is desirable wall warts aren't. Enjoy your new Rb Regards Paul WB8TSL On Thu, Sep 12, 2013 at 6:01 PM, Bob Stewart b...@evoria.net wrote: Thanks Bob. I looked at the datasheet again and found that they do like 15-18. Unfortunately my 18V supply is a wallwart that supplies 22.5-18V, 2.0-2.5A. By the ordering, I assume that means it's load dependent. So, I guess I'll find some Plan B. Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 4:52 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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. ___ 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] FE-5680A Voltage?
I just remembered: Someone here or on the Agilent list suggested I buy a handful of those LM2596 buckboards a few weeks ago. That one wallwart should have enough headroom to give me 15V. Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 4:52 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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] FE-5680A Voltage?
Hi Looking at the 2496 data sheet - you probably want to put something 20 volts into the board if you want a reasonable 15 volts out of it. Bob On Sep 12, 2013, at 8:01 PM, Bob Stewart b...@evoria.net wrote: I just remembered: Someone here or on the Agilent list suggested I buy a handful of those LM2596 buckboards a few weeks ago. That one wallwart should have enough headroom to give me 15V. Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 4:52 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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. ___ 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] RFTGm-II-Rb - can you gps discipline it without the XO module?
Hi Be very careful of using the same sensor to control your loop and to determine how well the device is holding temperature. It's amazingly easy to fool yourself by a couple of orders of magnitude…. The test is always to have a couple of other sensors located around the device and see what happens to them. That said, the real fun is to see how much thermal gain the loop has. If the outside temperature changes 100 C how much does your LPRO change? A 1 C change would be a thermal gain of 100X. Practical single stage controllers can get you into the 300 to 500 range. If your room ambient changes by 4C, the device should change by 0.04 C with a thermal gain of 100. Bob On Sep 12, 2013, at 8:52 PM, Alan Kamrowski II ala...@earthlink.net wrote: Hi Guido, A couple more questions about the RFTG if you have a moment: What are you default values for Avg Sample, Time Corr Schedule, and Freq Corr Schedule. Mine are 5, 15, 1440... Also with yours up and running how often does it make adjustments? Mine has been running for 82 hours and has made no time adjustments and the three frequency adjustments (every 24 hours) are for 0.e+000. It would seem that it is pretty happy with where it is as all of my previous times were loaded with both time and frequency adjustments in an attempt to get itself set properly. Perhaps it finally did. I've attached a temperature sensor to the LPRO inside and am using a PID loop on an AVR to vary a fan rpm to keep the LPRO at a consistent temp. It seems to be keeping it at +/- 0.2 deg C and I've not bothered to try to tune the PID at all yet. Thanks, Alan -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Guido Küppers Sent: Friday, August 23, 2013 1:25 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module? Hi Alan, I haven't seen this behaviour yet, but then I have RFTG shut off for a couple of months since. 7168 is dividible by 7 and the result is 1024. You know the gps week wraps over from 1023 (0x3ff) to 0. Perhaps what you see is the consequence of some software workaround of this problem, in other words the RFTG thinks a gps week rollover must have happened and tries to correct the date. Have fun Guido Von Samsung Mobile gesendet Alan Kamrowski II ala...@earthlink.net hat geschrieben: Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, Alan ___ 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. ___ 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] RFTGm-II-Rb - can you gps discipline it without the XO module?
Hi Guido, A couple more questions about the RFTG if you have a moment: What are you default values for Avg Sample, Time Corr Schedule, and Freq Corr Schedule. Mine are 5, 15, 1440... Also with yours up and running how often does it make adjustments? Mine has been running for 82 hours and has made no time adjustments and the three frequency adjustments (every 24 hours) are for 0.e+000. It would seem that it is pretty happy with where it is as all of my previous times were loaded with both time and frequency adjustments in an attempt to get itself set properly. Perhaps it finally did. I've attached a temperature sensor to the LPRO inside and am using a PID loop on an AVR to vary a fan rpm to keep the LPRO at a consistent temp. It seems to be keeping it at +/- 0.2 deg C and I've not bothered to try to tune the PID at all yet. Thanks, Alan -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Guido Küppers Sent: Friday, August 23, 2013 1:25 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module? Hi Alan, I haven't seen this behaviour yet, but then I have RFTG shut off for a couple of months since. 7168 is dividible by 7 and the result is 1024. You know the gps week wraps over from 1023 (0x3ff) to 0. Perhaps what you see is the consequence of some software workaround of this problem, in other words the RFTG thinks a gps week rollover must have happened and tries to correct the date. Have fun Guido Von Samsung Mobile gesendet Alan Kamrowski II ala...@earthlink.net hat geschrieben: Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, Alan ___ 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] ThunderBolt Display - Update
Dear Mr. Adam Maurer (VK4GHZ), It really has nothing to do with your accolades, accomplishments or the number of posts made on a list, chat room, forum, or even Youtube videos. Your attitude is an entirely different issue, however. Mr. Robert Atkinson (G8PRI) treated you with respect and merely questioned why you posted if you do not bother participating (which you openly admitted) in the list. Hardly a rebuke of your persona, let alone any accolades or accomplishments. Yet you felt, in a most disrespectful way, compelled to drag him through the mud as though he was mere trailer trash without the slightest of merit. This is far more telling of your character then Roberts. I especially liked your tall poppy syndrome. Referencing it shows you have serious narcissistic issues with your pedigree. The Time-nuts list has a stated purpose with the intent being a high SNR. That is, a high signal to low noise concept. Admittedly it has been getting out of hand more often than not lately. Using the Email Reflector as a communication medium for Time-nuts was chosen because it required the least amount of maintenance and served the purpose intended. It was not intended to be a chat room or forum. Just for the record this list reflector was established after the year 2000, even though you think it is so 1990's. Notably, your apparent supposition that someone's worth should be graded by the number, as apposed to the quality of the posts, is quite illuminating. Sharing, one of your claims of renown, is something we do on the Time-nuts list. Is it because they are looking for handouts ? Possibly some, but for most it is an educating effort or a peer review sort of thing. A kind of comradery, that is, openly sharing a common interest. As for free enterprise, no, I have nothing against it. A number of list members produce items and have mentioned them on the list. The list was and is not intended for one's captive audience for marketing purposes. Your three messages and admitted non participation violate the previous sentence. Your petty, vindictive, verbally abusive and very nasty attack on Mr. Robert Atkinson shows a serious lack of maturity and was totally uncalled for. So, my NO vote still stands as you are not worthy of our company. BillWB6BNQ Robert Atkinson wrote: Hi Adam, I have copied this to our outmoded reflector. At least it's low noise and high quality. Sorry but dispite having been a licenced amateur for 35 years, I don't meet your 55+ demographic. I am aware that amateur radio has an aging demographic. That is why I have tutored for the UK licence for 30 years with student ages as low as 10. If you paid $3k for 50 double sided PTH PCBs you need to find a new supplier. I HAVE invested my own money in group projects (not time nuts), in one case an PIC driven LCD display add on for an instrument. I was able to sell these on ebay for $75 and to list/group members for $50. Circuit, source code and Hex file are published and freely available. I also supplied programmed PICs on request. So you are wrong in your statement I seriously doubt somebody like you would (invest in making up kits for a group. I do value my own time which is why I don't waste it on email forums full of people who have lots of opinion but no knowledge. You are correct, I don't contribute much to Time Nuts, I'm here to learn. I have contributed the odd manual PDF (originals purchased and scanned by myself) and some bits and pieces to members off-list. I also sell support software on PROM for other equipment, again at discount to relevant list members and with full details available. Many people do prefer to pay me to program devices, but at least I give them the option and assistance to do it themselves. Don't know what you typed into google, but when I put g8rpi in the third item was an open design for a low noise high voltage power supply of mine. You don't have to waffle on on youtube to contribute! You seem very fond of your voice and face. You imply your display is not a commercial product. I guess its not as it does not appear to comply with C-Tick, FCC or CE requirements :-) I'm aware of the time and effort required to make webpages, I've had formal training on the subject. I don't have a webpage, I contribute directly to specific groups. I don't need to boost my ego online. Your main website looks like a shop to me. Your other webpage http://www.qsl.net/vk4cp/ is interesting Your other product the Icom Multi-send looks a great design, or not. $79 for a PIC 3 Sil relay a few connectors and an undrilled case.  On your display, why no circuit? looking at the pictures it has TWO 28 pin Microchip devices. If these are both MCUs I don't think much of your coding skills My display used a single 14 pin PIC. And a rotary SWITCH for mode selection, how quaint and old fashioned. Also why the 3.3V regulator? You claim 0.02V accuracy.
Re: [time-nuts] FE-5680A Voltage?
I hadn't given it any thought. I saw some ad that said 1.5 volts so I assumed that. But, after looking through the datasheet I see an efficiency figure of 73 percent for the adjustable one, so that does imply a need for about 20.5 volts. OTOH, it says the feedback voltage is 1.23V, so I dunno. And I'm certainly not pretending I have any electrical design skills. I'll find out. =) Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 7:54 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi Looking at the 2496 data sheet - you probably want to put something 20 volts into the board if you want a reasonable 15 volts out of it. Bob On Sep 12, 2013, at 8:01 PM, Bob Stewart b...@evoria.net wrote: I just remembered: Someone here or on the Agilent list suggested I buy a handful of those LM2596 buckboards a few weeks ago. That one wallwart should have enough headroom to give me 15V. Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 4:52 PM Subject: Re: [time-nuts] FE-5680A Voltage? Hi As I recall, 15 volts is sort of the minimum they recommend on most of the variations of the 5680. The internal regulators will probably be happier with 18 volts than with 14.25. You best bet is indeed a 15 V supply. Bob On Sep 12, 2013, at 11:03 AM, Bob Stewart b...@evoria.net wrote: I decided to order a Rb standard, and I was wondering what the lower limit on the 15V power requirement is? I have a PSU that will go up to 14.25V and my next closest is 18V. Should I just get a new 15V PSU before this gets in? Maybe I can make a quick mod on the big one and take it up to 15V. Bob - AE6RV ___ 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. ___ 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] New NTBW50AA
Well, I was in HD tonight and 100' is $25. Otherwise they had a roll of 500' for around $50. Nothing in between. You have to realize nothing out here in the boonies comes easy. I only need maybe 150' and actually the 3 pieces of 50' I have are not that old. We'll see what happens. Right now it seems to be working a little better with the antenna on the kitchen vent. I don't know what I'd do with 500'. Dave - Original Message - From: Bob Camp To: Discussion of precise time and frequency measurement Sent: Thursday, September 12, 2013 5:59 PM Subject: Re: [time-nuts] New NTBW50AA Hi Looks like RG-6 Quad Shield is about $50 for a 500' spool at the local big box stores. Bob ___ 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] New NTBW50AA
The LH OSCdisplay is measuring 'parts per trillion/div' of what? Sorry for the basic question, but I have not found it. At least I figured out it was trillion, not thousand. Dave ___ 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] RFTGm-II-Rb - can you gps discipline it without the XO module?
Hi Bob, I've got one of these: MCP9701A-E/TO-ND: http://www.digikey.com/product-search/en?x=0y=0lang=ensite=usKeyWords=MC P9701A-E%2FTO-ND Mounted to the connector side of the LPRO. I made a small aluminum bracket that fits under the hex head connector screws and clamps the TO92 to the LPRO case. It isn't at the physics end or taking the temperature of the base plate, but I am hoping that it will do. It outputs a voltage 400 mV = 0 deg C + 19.5 mV per deg C. I've got it feeding into an ADC channel on an AVR with a precision 2.5V reference. I've not calibrated it, but my ir temp sensor agrees pretty close to it, but calibration to a specific temp really isn't my goal, keeping the LRPO at the same temperature as much as possible is. Thanks, Alan -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Thursday, September 12, 2013 8:01 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module? Hi Be very careful of using the same sensor to control your loop and to determine how well the device is holding temperature. It's amazingly easy to fool yourself by a couple of orders of magnitude . The test is always to have a couple of other sensors located around the device and see what happens to them. That said, the real fun is to see how much thermal gain the loop has. If the outside temperature changes 100 C how much does your LPRO change? A 1 C change would be a thermal gain of 100X. Practical single stage controllers can get you into the 300 to 500 range. If your room ambient changes by 4C, the device should change by 0.04 C with a thermal gain of 100. Bob On Sep 12, 2013, at 8:52 PM, Alan Kamrowski II ala...@earthlink.net wrote: Hi Guido, A couple more questions about the RFTG if you have a moment: What are you default values for Avg Sample, Time Corr Schedule, and Freq Corr Schedule. Mine are 5, 15, 1440... Also with yours up and running how often does it make adjustments? Mine has been running for 82 hours and has made no time adjustments and the three frequency adjustments (every 24 hours) are for 0.e+000. It would seem that it is pretty happy with where it is as all of my previous times were loaded with both time and frequency adjustments in an attempt to get itself set properly. Perhaps it finally did. I've attached a temperature sensor to the LPRO inside and am using a PID loop on an AVR to vary a fan rpm to keep the LPRO at a consistent temp. It seems to be keeping it at +/- 0.2 deg C and I've not bothered to try to tune the PID at all yet. Thanks, Alan -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Guido Küppers Sent: Friday, August 23, 2013 1:25 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module? Hi Alan, I haven't seen this behaviour yet, but then I have RFTG shut off for a couple of months since. 7168 is dividible by 7 and the result is 1024. You know the gps week wraps over from 1023 (0x3ff) to 0. Perhaps what you see is the consequence of some software workaround of this problem, in other words the RFTG thinks a gps week rollover must have happened and tries to correct the date. Have fun Guido Von Samsung Mobile gesendet Alan Kamrowski II ala...@earthlink.net hat geschrieben: Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, Alan ___ 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. ___ 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] ThunderBolt Display - Update
Do all of us have to continue to be subjected to this pissing contest? Please quit or take it offline. Joe Gray W5JG On Thu, Sep 12, 2013 at 7:13 PM, wb6bnq wb6...@cox.net wrote: Dear Mr. Adam Maurer (VK4GHZ), It really has nothing to do with your accolades, accomplishments or the number of posts made on a list, chat room, forum, or even Youtube videos. Your attitude is an entirely different issue, however. Mr. Robert Atkinson (G8PRI) treated you with respect and merely questioned why you posted if you do not bother participating (which you openly admitted) in the list. Hardly a rebuke of your persona, let alone any accolades or accomplishments. Yet you felt, in a most disrespectful way, compelled to drag him through the mud as though he was mere trailer trash without the slightest of merit. This is far more telling of your character then Roberts. I especially liked your tall poppy syndrome. Referencing it shows you have serious narcissistic issues with your pedigree. The Time-nuts list has a stated purpose with the intent being a high SNR. That is, a high signal to low noise concept. Admittedly it has been getting out of hand more often than not lately. Using the Email Reflector as a communication medium for Time-nuts was chosen because it required the least amount of maintenance and served the purpose intended. It was not intended to be a chat room or forum. Just for the record this list reflector was established after the year 2000, even though you think it is so 1990's. Notably, your apparent supposition that someone's worth should be graded by the number, as apposed to the quality of the posts, is quite illuminating. Sharing, one of your claims of renown, is something we do on the Time-nuts list. Is it because they are looking for handouts ? Possibly some, but for most it is an educating effort or a peer review sort of thing. A kind of comradery, that is, openly sharing a common interest. As for free enterprise, no, I have nothing against it. A number of list members produce items and have mentioned them on the list. The list was and is not intended for one's captive audience for marketing purposes. Your three messages and admitted non participation violate the previous sentence. Your petty, vindictive, verbally abusive and very nasty attack on Mr. Robert Atkinson shows a serious lack of maturity and was totally uncalled for. So, my NO vote still stands as you are not worthy of our company. BillWB6BNQ Robert Atkinson wrote: Hi Adam, I have copied this to our outmoded reflector. At least it's low noise and high quality. Sorry but dispite having been a licenced amateur for 35 years, I don't meet your 55+ demographic. I am aware that amateur radio has an aging demographic. That is why I have tutored for the UK licence for 30 years with student ages as low as 10. If you paid $3k for 50 double sided PTH PCBs you need to find a new supplier. I HAVE invested my own money in group projects (not time nuts), in one case an PIC driven LCD display add on for an instrument. I was able to sell these on ebay for $75 and to list/group members for $50. Circuit, source code and Hex file are published and freely available. I also supplied programmed PICs on request. So you are wrong in your statement I seriously doubt somebody like you would (invest in making up kits for a group. I do value my own time which is why I don't waste it on email forums full of people who have lots of opinion but no knowledge. You are correct, I don't contribute much to Time Nuts, I'm here to learn. I have contributed the odd manual PDF (originals purchased and scanned by myself) and some bits and pieces to members off-list. I also sell support software on PROM for other equipment, again at discount to relevant list members and with full details available. Many people do prefer to pay me to program devices, but at least I give them the option and assistance to do it themselves. Don't know what you typed into google, but when I put g8rpi in the third item was an open design for a low noise high voltage power supply of mine. You don't have to waffle on on youtube to contribute! You seem very fond of your voice and face. You imply your display is not a commercial product. I guess its not as it does not appear to comply with C-Tick, FCC or CE requirements :-) I'm aware of the time and effort required to make webpages, I've had formal training on the subject. I don't have a webpage, I contribute directly to specific groups. I don't need to boost my ego online. Your main website looks like a shop to me. Your other webpage http://www.qsl.net/vk4cp/ is interesting Your other product the Icom Multi-send looks a great design, or not. $79 for a PIC 3 Sil relay a few connectors and an undrilled case.  On your display, why no circuit? looking at the pictures it has TWO 28 pin Microchip devices. If these are both MCUs I don't
Re: [time-nuts] FE-5680A Voltage?
Looking at the LM2596 datasheet the switch transistor saturation voltage is 1.5V max at 3A (1.16v typ). That and an educated guess of about 0.25V for inductor loss combine to set the minimum difference between input and output. The 1.23V reference is about +/-3% accurate, so after setting the buckboard to 15.00V out (at 25C) expect it to shift at most 0.5V over time and temp. Add that to the minimum in-out difference and now you are at a minimum safe input of 2.25V above the nominal 15V output, or 17.25V in. An old 19V 3A laptop supply might be a good supply to use for this, if you were local I'd hand you one. As for efficiency, that just tells you the amount of heat the regulator, plus inductor, plus diode, etc. will throw off. FWIW the datasheet Figure 5 indicates you should expect about 88% or better efficiency for 15V out and at least 2V higher input voltage. (Doing some switching power supply design for a living does help with my understanding of them, but not ever enough!) Bob LaJeunesse From: Bob Stewart b...@evoria.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 9:28 PM Subject: Re: [time-nuts] FE-5680A Voltage? I hadn't given it any thought. I saw some ad that said 1.5 volts so I assumed that. But, after looking through the datasheet I see an efficiency figure of 73 percent for the adjustable one, so that does imply a need for about 20.5 volts. OTOH, it says the feedback voltage is 1.23V, so I dunno. And I'm certainly not pretending I have any electrical design skills. I'll find out. =) Bob ___ 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] ThunderBolt Display - Update
Enough already. As ever, the followups are worse than the original offense, if any. Robert should not have forwarded Adam's reply to the list, but since he did, note that _another list member_ suggested that Adam post the information here. Nice welcome. Not. Orin, KJ7HQ. ___ 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] FE-5680A Voltage?
Yes, my reading of the datasheet was the same. 18V in would be fine for 15V output. My concern would be how noisy the output would be. I have 9 of the from China ebay boards here (gave one to my boss to play with). I should wire one up and take a look. At any rate, I think a turn or two of the output wires through a ferrite bead would be in order. The data sheet shows a secondary filter of 3uH/180uF as well which I'd certainly want to use to feed a 5680A. Shouldn't do any harm, might do some good. Orin. On Thu, Sep 12, 2013 at 7:19 PM, Robert LaJeunesse rlajeune...@sbcglobal.net wrote: Looking at the LM2596 datasheet the switch transistor saturation voltage is 1.5V max at 3A (1.16v typ). That and an educated guess of about 0.25V for inductor loss combine to set the minimum difference between input and output. The 1.23V reference is about +/-3% accurate, so after setting the buckboard to 15.00V out (at 25C) expect it to shift at most 0.5V over time and temp. Add that to the minimum in-out difference and now you are at a minimum safe input of 2.25V above the nominal 15V output, or 17.25V in. An old 19V 3A laptop supply might be a good supply to use for this, if you were local I'd hand you one. As for efficiency, that just tells you the amount of heat the regulator, plus inductor, plus diode, etc. will throw off. FWIW the datasheet Figure 5 indicates you should expect about 88% or better efficiency for 15V out and at least 2V higher input voltage. (Doing some switching power supply design for a living does help with my understanding of them, but not ever enough!) Bob LaJeunesse ___ 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] FE-5680A Voltage?
Thanks for the input Orin! I'm trying to keep this from turning into the monumental effort my GPSDO had turned into, at least for the moment. So it's going to have to accept whatever the buckboard gives it, unless that's not enough. I just want to see what kind accuracy my GPSDO gives on the scope. Later on, I'll give it a decent place to live. Bob From: Orin Eman orin.e...@gmail.com To: Robert LaJeunesse lajeune...@mail.com; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, September 12, 2013 9:40 PM Subject: Re: [time-nuts] FE-5680A Voltage? Yes, my reading of the datasheet was the same. 18V in would be fine for 15V output. My concern would be how noisy the output would be. I have 9 of the from China ebay boards here (gave one to my boss to play with). I should wire one up and take a look. At any rate, I think a turn or two of the output wires through a ferrite bead would be in order. The data sheet shows a secondary filter of 3uH/180uF as well which I'd certainly want to use to feed a 5680A. Shouldn't do any harm, might do some good. Orin. On Thu, Sep 12, 2013 at 7:19 PM, Robert LaJeunesse rlajeune...@sbcglobal.net wrote: Looking at the LM2596 datasheet the switch transistor saturation voltage is 1.5V max at 3A (1.16v typ). That and an educated guess of about 0.25V for inductor loss combine to set the minimum difference between input and output. The 1.23V reference is about +/-3% accurate, so after setting the buckboard to 15.00V out (at 25C) expect it to shift at most 0.5V over time and temp. Add that to the minimum in-out difference and now you are at a minimum safe input of 2.25V above the nominal 15V output, or 17.25V in. An old 19V 3A laptop supply might be a good supply to use for this, if you were local I'd hand you one. As for efficiency, that just tells you the amount of heat the regulator, plus inductor, plus diode, etc. will throw off. FWIW the datasheet Figure 5 indicates you should expect about 88% or better efficiency for 15V out and at least 2V higher input voltage. (Doing some switching power supply design for a living does help with my understanding of them, but not ever enough!) Bob LaJeunesse ___ 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] Thunderbolt Display
It has been my pleasure to own and operate the VK4GHZ Thunderbolt display for several months. It works good, does what is should and I am totally pleased with it. It was easily installed and operated from the get go. If I did not have one I would have appreciated being notified of the of such a product via this list so I could buy it. It has been my good fortune to be Chief Engineer or VP of engineering for a number of RF organizations prior to my retirement. As such one must estimate and then defend to management, customers or the government, the non-recurring engineering costs for every project. So I can say with some confidence, rotary switches or not, this device required several hundred hours of design time for which the designer will never recover the true cost unless he values his time at 8 cents an hour. So a hearty well done to VK4GHZ from this old engineer. Further despite the pompous pretense of High SNR I see things a bit different - 1. Many are too lazy to delete the previous emails when commenting - resulting infinitely redundant repetition of previous comments. So much for not wasting bandwidth. 2. There is a tendency to hammer someone to death for being off topic. So what, I cannot see that the on topic stuff is all that vital to the good of mankind. Interesting, and invaluable sometimes, but if the space wasted by the practices noted in item 1 were devoted to some of stuff judged off topic - this list would be a lot more interesting. An example was the never-ending discussion of RS-232 a couple of weeks back. I believe that every possible mickey-mouse way to not do an RS-232 interface properly was floated. Yet this is on topic. I even noted that one person - who most of us respect - manged to volunteer the notion that no one should use RS-232 now days. Hunh?? Why not? It works and the USB disadvantaged such as myself manage to get by with it while implementing our projects. So it is my view that a number of members of this group could use a large injection of common courtesy, and should not be so critical of the efforts of others. After all, it is a hobby. -73 john K6IQL ___ 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] RFTG GPSDO and other GPSDO questions...
Hi Everyone, I've had some fun and learned quite a bit trying to get my Lucent RFTG rubidium module to discipline itself to a GPS module. It has an interesting way of doing this that I'm not sure is the best or the worst, but it is constantly figuring out an average phase error between the gps 1pps signal and its own 1pps signal generated by dividing the Rb clock. It can make both time corrections (to correct the phase of the 1pps generated signal) and frequency corrections by changing the control voltage on the rubidium. I've been trying to figure out exactly how it works, but can only guess at some things. It measures an average phase error over a 5 minute interval right now, and clearly it is using a 10Mhz clocked device to do this. It usually bounces between a phase error of +40nS or -60nS and it can only make time corrections in 100nS increments. My theory is that if the average phase error is large enough that it can adjust for it then it will do so, for example an average phase error of 150nS would mean that it could adjust by 100nS leaving only 50nS. It tries to adjust the 1pps (time correction) every 15 minutes. It also calculates the delta between these average phase errors and I watched them for an hour and you will see things like +6nS delta followed by a -6nS delta and adding all the delta's together for the hour I got 0. I would think it might actually use these delta. I would think looking at this delta for a long period of time might be helpful for it to determine a frequency correction, but perhaps that isn't how it works. Maybe it looks at the adjustment it made (100nS) and the time between adjustments, say 10 hours to determine the frequency adjustment. I can't think that would be as accurate because it makes time adjustments on a 15 minute schedule. You can also tweak the time correction schedule and frequency correction schedule so I'm not sure they are relatable to each other or not. I just know that my unit has been running for 30 seconds and still hasn't made a 100ns adjustment. It has displayed no time adjustments and three frequency adjustments each for 0.e0. This got me to wondering - how do other GPSDO units work? Do they take days and weeks to build up enough data to discipline themselves or are there faster methods? Thanks, Alan ___ 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] Thunder Bolt Display...
Well, I thought it was appropriate for this group. But, what do I know. I would probably get one except that I don't have a Thunderbolt. Even so, it was interesting to see the video. Well done, Adam. Burt, K6OQK Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. b...@att.net www.biwa.cc K6OQK ___ 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.
