Re: [time-nuts] HP5090A Off Air Standard Receiver
I'm sure there's various ways of doing it, a phase locked oscillator perhaps, dividing 10MHz by 50, or perhaps my preferred lazy method of dividing 800KHz by 4:-) It really doesn't really matter all that much, the initial comment was just that it might be better to provide a 200KHz signal from an alternative source rather than attempt to modify the 5090 to accept 198KHz and the implementation itself should be quite straightforward. Nigel, GM8PZR In a message dated 19/06/2017 14:46:59 GMT Summer Time, cjaysh...@gmail.com writes: If it's just locking to the carrier I wonder if it'd be possible to use a suitably modified PICDiv clocked from a 'standard' 10MHz GPS locked device like the Lucent? On 19 June 2017 at 14:19, GandalfG8--- via time-nuts wrote: I suppose a converter from 198KHz could be an option but I know of at least one other experimenter who's run into problems with the Teleswitch modulation on the Droitwich signal when trying something similar with a 5090A. Although, from one point of view, running it from the present 198KHz signal might be considered the ultimate goal it's the operation of the hardware itself that's of more interest to me in this instance, so I'm quite happy just to feed it with an accurate 200KHz signal from whatever other sources are available. Nigel, GM8PZR How about building a frequency converter to produce 200KHz; mixing the incoming RF (198KHz) with 2KHz derived from the output of the unit, On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote: > Hi Pete That's quite good timing, if you'll pardon the expression:-), as I uploaded a pdf version of the 5090A manual to mediafire a couple of months ago _http://www.mediafire.com/file/http://www.mediafire.com/filehttp://www.medi_ (http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf) I know a few others have considered converting the 5090A to 198KHz but it's not straightforward and I believe the general consensus has been that it's not really worth the effort. I have a 5090B which I'm hoping to get up and running when it finally reaches the top of the to do list and my view is that it would be much better to leave the original electronics undisturbed and to drive it with a 200 KHz signal divided down from a from a GPSDO or a rubidium module, although having one of the latter already running at 800KHz does leave me a bit biased:-) Regards Nigel, GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to _https://www.febo.com/cgi-bin/https://www.febo.com/cgi-b_ (https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts) and follow the instructions there. -- Clint. No trees were harmed in the sending of this mail. However, a large number of electrons were greatly inconvenienced. ___ 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] HP5090A Off Air Standard Receiver
Hi If it’s an off the air receiver, it’s got front end filtering and all the rejection you would want to lock on to a single carrier. 200 KHz and 2 KHz fed into an XOR would give you what you likely need. A PICDiv should be able to generate both those “tones” without a lot of crazy effort. There are a lot of combinations that could be used. A bit of play time with a spread sheet is likely called for here. If the carrier needs modulation, then that would take a bit more effort. It’s still not outside the range of what could be done with a fairly simple board. We have tossed up the names of a couple dozen candidates over the last year or so. Bob > On Jun 19, 2017, at 9:46 AM, Clint Jay wrote: > > If it's just locking to the carrier I wonder if it'd be possible to use a > suitably modified PICDiv clocked from a 'standard' 10MHz GPS locked device > like the Lucent? > > On 19 June 2017 at 14:19, GandalfG8--- via time-nuts > wrote: > >> I suppose a converter from 198KHz could be an option but I know of at >> least one other experimenter who's run into problems with the Teleswitch >> modulation on the Droitwich signal when trying something similar with a >> 5090A. >> >> Although, from one point of view, running it from the present 198KHz >> signal might be considered the ultimate goal it's the operation of the >> hardware >> itself that's of more interest to me in this instance, so I'm quite happy >> just to feed it with an accurate 200KHz signal from whatever other sources >> are available. >> >> Nigel, GM8PZR >> >> >> How about building a frequency converter to produce 200KHz; mixing the >> incoming RF (198KHz) with 2KHz derived from the output of the unit, >> >> On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote: >>> Hi Pete >> That's quite good timing, if you'll pardon the expression:-), as I >> uploaded a pdf version of the 5090A manual to mediafire a couple of >> months >> ago http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_ >> and_Service.pdf >> I know a few others have considered converting the 5090A to 198KHz but >> it's not straightforward and I believe the general consensus has been that >> it's not really worth the effort. >> I have a 5090B which I'm hoping to get up and running when it finally >> reaches the top of the to do list and my view is that it would be much >> better >> to leave the original electronics undisturbed and to drive it with a 200 >> KHz signal divided down from a from a GPSDO or a rubidium module, >> although >> having one of the latter already running at 800KHz does leave me a bit >> biased:-) >> Regards >> Nigel, GM8PZR >> ___ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> mailman/listinfo/time-nuts >> and follow the instructions there. >> > > > > -- > Clint. > > *No trees were harmed in the sending of this mail. However, a large number > of electrons were greatly inconvenienced.* > ___ > 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] HP5090A Off Air Standard Receiver
And Attila wins the reflector for today!!! __ Clay Autery, KY5G On 6/19/2017 2:29 AM, Attila Kinali wrote: > > You aren't seriously asking a time-nut what the point of doing something is, > are you? We are doing what we do because we think it's fun. Because we > might learn something. Or because we think it would be cool. Not everything > needs to have a rational goal judged by price vs. performance, does it? > > Attila Kinali > ___ 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] HP5090A Off Air Standard Receiver
If it's just locking to the carrier I wonder if it'd be possible to use a suitably modified PICDiv clocked from a 'standard' 10MHz GPS locked device like the Lucent? On 19 June 2017 at 14:19, GandalfG8--- via time-nuts wrote: > I suppose a converter from 198KHz could be an option but I know of at > least one other experimenter who's run into problems with the Teleswitch > modulation on the Droitwich signal when trying something similar with a > 5090A. > > Although, from one point of view, running it from the present 198KHz > signal might be considered the ultimate goal it's the operation of the > hardware > itself that's of more interest to me in this instance, so I'm quite happy > just to feed it with an accurate 200KHz signal from whatever other sources > are available. > > Nigel, GM8PZR > > > How about building a frequency converter to produce 200KHz; mixing the > incoming RF (198KHz) with 2KHz derived from the output of the unit, > > On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote: > > Hi Pete > That's quite good timing, if you'll pardon the expression:-), as I > uploaded a pdf version of the 5090A manual to mediafire a couple of > months > ago http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_ > and_Service.pdf > I know a few others have considered converting the 5090A to 198KHz but > it's not straightforward and I believe the general consensus has been that > it's not really worth the effort. > I have a 5090B which I'm hoping to get up and running when it finally > reaches the top of the to do list and my view is that it would be much > better > to leave the original electronics undisturbed and to drive it with a 200 > KHz signal divided down from a from a GPSDO or a rubidium module, > although > having one of the latter already running at 800KHz does leave me a bit > biased:-) > Regards > Nigel, GM8PZR > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- Clint. *No trees were harmed in the sending of this mail. However, a large number of electrons were greatly inconvenienced.* ___ 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] HP5090A Off Air Standard Receiver
I suppose a converter from 198KHz could be an option but I know of at least one other experimenter who's run into problems with the Teleswitch modulation on the Droitwich signal when trying something similar with a 5090A. Although, from one point of view, running it from the present 198KHz signal might be considered the ultimate goal it's the operation of the hardware itself that's of more interest to me in this instance, so I'm quite happy just to feed it with an accurate 200KHz signal from whatever other sources are available. Nigel, GM8PZR How about building a frequency converter to produce 200KHz; mixing the incoming RF (198KHz) with 2KHz derived from the output of the unit, On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote: > Hi Pete That's quite good timing, if you'll pardon the expression:-), as I uploaded a pdf version of the 5090A manual to mediafire a couple of months ago http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf I know a few others have considered converting the 5090A to 198KHz but it's not straightforward and I believe the general consensus has been that it's not really worth the effort. I have a 5090B which I'm hoping to get up and running when it finally reaches the top of the to do list and my view is that it would be much better to leave the original electronics undisturbed and to drive it with a 200 KHz signal divided down from a from a GPSDO or a rubidium module, although having one of the latter already running at 800KHz does leave me a bit biased:-) Regards Nigel, GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP5090A Off Air Standard Receiver
How about building a frequency converter to produce 200KHz; mixing the incoming RF (198KHz) with 2KHz derived from the output of the unit, On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote: > Hi Pete > > That's quite good timing, if you'll pardon the expression:-), as I uploaded > a pdf version of the 5090A manual to mediafire a couple of months ago > > http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf > > I know a few others have considered converting the 5090A to 198KHz but it's > not straightforward and I believe the general consensus has been that it's > not really worth the effort. > > I have a 5090B which I'm hoping to get up and running when it finally > reaches the top of the to do list and my view is that it would be much better > to > leave the original electronics undisturbed and to drive it with a 200 KHz > signal divided down from a from a GPSDO or a rubidium module, although > having one of the latter already running at 800KHz does leave me a bit > biased:-) > > Regards > > Nigel, GM8PZR > > Does anyone happen to have an electronic copy of the user / technical > manual they would share with me?All expenses covered. > This rather unusual unit was produced in the UK in the days or the rather > sensible 200kHz Droitwich transmissions. > Im considering reworking the unit to the newer 198kHz standard. > PeteG4GJL > ___ > 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. > -- Stephen Tompsett ___ 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] HP5090A Off Air Standard Receiver
Um... I'm sure this response was well intended, so thank you for that and for the advice, but I do feel that Attila's earlier reply explained my reasoning remarkably well. Under consideration is the taking of a very nice example of an older and now unusable off air frequency reference, a little bit of interesting history perhaps, and putting it back on the air without any form of internal modification. So what's the point? Well that's it, other than the satisfaction of doing it there really is no point, other than perhaps, to quote one of my wife's favourite sayings, "just because":-) Time code receivers are not really my thing, each to their own I guess, but a no doubt somewhat unhealthy obsession with reasonably precise frequency generation does mean that finding a more modern frequency source to drive it may not be too much of a problem:-) Nigel, GM8PZR On 06/18/2017 04:17 PM, GandalfG8--- via time-nuts wrote:> I have a 5090B which I'm hoping to get up and running when it finally > reaches the top of the to do list and my view is that it would be much better to > leave the original electronics undisturbed and to drive it with a 200 KHz > signal divided down from a from a GPSDO or a rubidium module, although > having one of the latter already running at 800KHz does leave me a bit > biased:-) What in the world would the point of that be!? It appears to be a long-obsolete product, so have you searched for more modern time code receivers from timing instrumentation (Meinberg, Brandywine, et al.) and surplus vendors? It'll probably be pretty expensive, for it's probably much less popular than WWVB and DCF77. Have you tried the latter? It might be receivable from Britain, and I've seen some surplus DCF77 receivers (e.g., an old ISA card). -Ruslan ___ 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] HP5090A Off Air Standard Receiver
On Sun, 18 Jun 2017 21:52:04 -0400 Ruslan Nabioullin wrote: > What in the world would the point of that be!? It appears to be a > long-obsolete product, so have you searched for more modern time code > receivers from timing instrumentation (Meinberg, Brandywine, et al.) and > surplus vendors? It'll probably be pretty expensive, for it's probably > much less popular than WWVB and DCF77. Have you tried the latter? It > might be receivable from Britain, and I've seen some surplus DCF77 > receivers (e.g., an old ISA card). You aren't seriously asking a time-nut what the point of doing something is, are you? We are doing what we do because we think it's fun. Because we might learn something. Or because we think it would be cool. Not everything needs to have a rational goal judged by price vs. performance, does it? Attila Kinali -- You know, the very powerful and the very stupid have one thing in common. They don't alters their views to fit the facts, they alter the facts to fit the views, which can be uncomfortable if you happen to be one of the facts that needs altering. -- The Doctor ___ 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] HP5090A Off Air Standard Receiver
On 06/18/2017 04:17 PM, GandalfG8--- via time-nuts wrote:> I have a 5090B which I'm hoping to get up and running when it finally reaches the top of the to do list and my view is that it would be much better to leave the original electronics undisturbed and to drive it with a 200 KHz signal divided down from a from a GPSDO or a rubidium module, although having one of the latter already running at 800KHz does leave me a bit biased:-) What in the world would the point of that be!? It appears to be a long-obsolete product, so have you searched for more modern time code receivers from timing instrumentation (Meinberg, Brandywine, et al.) and surplus vendors? It'll probably be pretty expensive, for it's probably much less popular than WWVB and DCF77. Have you tried the latter? It might be receivable from Britain, and I've seen some surplus DCF77 receivers (e.g., an old ISA card). -Ruslan -- Ruslan Nabioullin Wittgenstein Laboratories rnabioul...@gmail.com (508) 523-8535 50 Louise Dr. Hollis, NH 03049 ___ 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] HP5090A Off Air Standard Receiver
Hi Pete That's quite good timing, if you'll pardon the expression:-), as I uploaded a pdf version of the 5090A manual to mediafire a couple of months ago http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf I know a few others have considered converting the 5090A to 198KHz but it's not straightforward and I believe the general consensus has been that it's not really worth the effort. I have a 5090B which I'm hoping to get up and running when it finally reaches the top of the to do list and my view is that it would be much better to leave the original electronics undisturbed and to drive it with a 200 KHz signal divided down from a from a GPSDO or a rubidium module, although having one of the latter already running at 800KHz does leave me a bit biased:-) Regards Nigel, GM8PZR Does anyone happen to have an electronic copy of the user / technical manual they would share with me?All expenses covered. This rather unusual unit was produced in the UK in the days or the rather sensible 200kHz Droitwich transmissions. Im considering reworking the unit to the newer 198kHz standard. PeteG4GJL ___ 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] HP5090A Off Air Standard Receiver
Does anyone happen to have an electronic copy of the user / technical manual they would share with me?All expenses covered. This rather unusual unit was produced in the UK in the days or the rather sensible 200kHz Droitwich transmissions. Im considering reworking the unit to the newer 198kHz standard. PeteG4GJL ___ 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.
