[time-nuts] Re: Help ID'ing Frequency Standard (John Ackermann N8UR)
If anyone who has a 5110A system would like this unit as a spare or replacement, drop me a note off list. It's yours for the cost of shipping. (Only those who can use it as intended need not apply... if it were to be dissected and played with, I'd be the one doing it :-) ) John On 6/7/21 5:52 AM, vilgot...@gmail.com wrote: This is indeed the frequency standard from the 5110A synthesizer driver. A few years ago I scanned and posted the manual for it on BAMA from where you can download it. I first encountered this marvelous instrument when I was an EE student in the late 1960's and was absolutely blown away by it. I wrote my final year thesis in 1970 on frequency synthesizers and the direct synthesis technology in the 5100A figured prominently. Compared to the other RF signal generators if the day it was way ahead! Years later I am lucky enough to have a 5100A/5110A combo here and it works beautifully. I had to replace an immolated SRD with a varactor as described in the prc68 web page which is a story in itself, and it hasn't missed a beat since. The synthesizer has provision for computer control of the push button functions so the frequency can be switched very rapidly by software. I have the connectors and suitable cable but have never got around to building a suitable interface. More modern equipment superseded it but I'm very pleased to have one still working. 73, Morris Odell VK3DOC Locked down in Melbourne, Australia ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard (John Ackermann N8UR)
This is indeed the frequency standard from the 5110A synthesizer driver. A few years ago I scanned and posted the manual for it on BAMA from where you can download it. I first encountered this marvelous instrument when I was an EE student in the late 1960's and was absolutely blown away by it. I wrote my final year thesis in 1970 on frequency synthesizers and the direct synthesis technology in the 5100A figured prominently. Compared to the other RF signal generators if the day it was way ahead! Years later I am lucky enough to have a 5100A/5110A combo here and it works beautifully. I had to replace an immolated SRD with a varactor as described in the prc68 web page which is a story in itself, and it hasn't missed a beat since. The synthesizer has provision for computer control of the push button functions so the frequency can be switched very rapidly by software. I have the connectors and suitable cable but have never got around to building a suitable interface. More modern equipment superseded it but I'm very pleased to have one still working. 73, Morris Odell VK3DOC Locked down in Melbourne, Australia ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
And (thanks to TVB) -- that's the answer. It's from the 5110A synthesizer driver, circa 1965. On 6/6/21 1:28 PM, Poul-Henning Kamp wrote: Magne Mæhre writes: On 6/6/21 4:22 PM, John Ackermann N8UR wrote: Looking through the junk box I came upon a metal box labeled: Frequency Standard 05110-6014 Series 330 This eBay listing lists it as a 1 MHz HP frequency standard HP 5110 was the driver HP's first "cash-register" synthesizer. According to the HP5110A manual: 05110-6014 is "A2 Frequency Standard" And: 05110-6081 is "A3 Crystal Filter" https://bama.edebris.com/manuals/hp/5110a/ ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
Ahh, the HP-5110A was the driver for the 5100 Synthesizer, a monstrously heavy beast from the 1960s. See this link: https://www.prc68.com/I/HP5100.shtml On Sun, Jun 6, 2021 at 10:28 AM Poul-Henning Kamp wrote: > > Magne Mæhre writes: > > On 6/6/21 4:22 PM, John Ackermann N8UR wrote: > > > Looking through the junk box I came upon a metal box labeled: > > > > > > Frequency Standard > > > 05110-6014 > > > Series 330 > > > > This eBay listing lists it as a 1 MHz HP frequency standard > > HP 5110 was the driver HP's first "cash-register" synthesizer. > > According to the HP5110A manual: > > 05110-6014 is "A2 Frequency Standard" > > And: > > 05110-6081 is "A3 Crystal Filter" > > https://bama.edebris.com/manuals/hp/5110a/ > > > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > p...@freebsd.org | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. -- Jeremy Nichols Sent from my iPad 6. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
Magne Mæhre writes: > On 6/6/21 4:22 PM, John Ackermann N8UR wrote: > > Looking through the junk box I came upon a metal box labeled: > > > > Frequency Standard > > 05110-6014 > > Series 330 > > This eBay listing lists it as a 1 MHz HP frequency standard HP 5110 was the driver HP's first "cash-register" synthesizer. According to the HP5110A manual: 05110-6014 is "A2 Frequency Standard" And: 05110-6081 is "A3 Crystal Filter" https://bama.edebris.com/manuals/hp/5110a/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
None of my older HP counters, standards, etc., have 5110 part numbers. A 1 MHz standard would date from the early 60s—the 5245L counter was introduced in ‘63, I believe, with a 1 MHz standard. HP shifted to 5 MHz standards later in the 1960s. A 5110 number definitely puts it in the Frequency and Time (02) division, probably before the division moved to Santa Clara from Palo Alto. Jeremy On Sun, Jun 6, 2021 at 10:06 AM John Ackermann N8UR wrote: > Thanks for doing that digging, Magne! The eBay pics exactly match what > I have. I wonder what HP product it was used in... the parts list > doesn't help with that, unfortunately. I did a quick search for > 05110-6030 which is what it replaces, and that didn't turn up anything > on Google. > > John > > > On 6/6/21 11:39 AM, Magne Mæhre wrote: > > On 6/6/21 4:22 PM, John Ackermann N8UR wrote: > >> Looking through the junk box I came upon a metal box labeled: > >> > >> Frequency Standard > >> 05110-6014 > >> Series 330 > > > > This eBay listing lists it as a 1 MHz HP frequency standard > > > > > https://www.ebay.de/itm/133759143331?mkevt=1=1=707-53477-19255-0=5338722076=10001 > > > > > > > > This list refers to it as a replacement > > > > http://hparchive.com/PARTS/HP-Parts-List-1973-74.pdf > > > > I couldn't get a solid URL for these outdated ebay pics, so I did a > > screenshot: > > http://ixocarpa.hytra.org/pub/2021-06-06-zSYSQQhalxs/hp05110-6014.png > > > > --Magne / LA1BFA > > ___ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-le...@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. -- Jeremy Nichols Sent from my iPad 6. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
Thanks for doing that digging, Magne! The eBay pics exactly match what I have. I wonder what HP product it was used in... the parts list doesn't help with that, unfortunately. I did a quick search for 05110-6030 which is what it replaces, and that didn't turn up anything on Google. John On 6/6/21 11:39 AM, Magne Mæhre wrote: On 6/6/21 4:22 PM, John Ackermann N8UR wrote: Looking through the junk box I came upon a metal box labeled: Frequency Standard 05110-6014 Series 330 This eBay listing lists it as a 1 MHz HP frequency standard https://www.ebay.de/itm/133759143331?mkevt=1=1=707-53477-19255-0=5338722076=10001 This list refers to it as a replacement http://hparchive.com/PARTS/HP-Parts-List-1973-74.pdf I couldn't get a solid URL for these outdated ebay pics, so I did a screenshot: http://ixocarpa.hytra.org/pub/2021-06-06-zSYSQQhalxs/hp05110-6014.png --Magne / LA1BFA ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
Bob, that could be -- the R-1051 rings a bell. Found this page with lots of info: http://www.navy-radio.com/rcvrs/r1051.htm But the part numbers they show for the frequency standard are very different than this one, so I'm not sure. John On 6/6/21 11:35 AM, Bob kb8tq wrote: Hi Sounds a lot like the sort of thing you would see in an R-1051 or similar military gear from the late 1950’s or 1960’s. The labeling does not sound right for an assembly out of a piece of HP gear. Bob On Jun 6, 2021, at 10:22 AM, John Ackermann N8UR wrote: Looking through the junk box I came upon a metal box labeled: Frequency Standard 05110-6014 Series 330 It's about 4 1/2 x 5 1/2 x 3 inches and has odd voltage inputs -- -16V, +10V, -12.6V along with a terminal for "meter switch" and 2 BNC jacks. There are several adjustment points accessible through the box. Google doesn't turn up anything. Anyone know what this beast is? Thanks! John ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
On 6/6/21 4:22 PM, John Ackermann N8UR wrote: > Looking through the junk box I came upon a metal box labeled: > > Frequency Standard > 05110-6014 > Series 330 This eBay listing lists it as a 1 MHz HP frequency standard https://www.ebay.de/itm/133759143331?mkevt=1=1=707-53477-19255-0=5338722076=10001 This list refers to it as a replacement http://hparchive.com/PARTS/HP-Parts-List-1973-74.pdf I couldn't get a solid URL for these outdated ebay pics, so I did a screenshot: http://ixocarpa.hytra.org/pub/2021-06-06-zSYSQQhalxs/hp05110-6014.png --Magne / LA1BFA ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
Hi Sounds a lot like the sort of thing you would see in an R-1051 or similar military gear from the late 1950’s or 1960’s. The labeling does not sound right for an assembly out of a piece of HP gear. Bob > On Jun 6, 2021, at 10:22 AM, John Ackermann N8UR wrote: > > Looking through the junk box I came upon a metal box labeled: > > Frequency Standard > 05110-6014 > Series 330 > > It's about 4 1/2 x 5 1/2 x 3 inches and has odd voltage inputs -- -16V, +10V, > -12.6V along with a terminal for "meter switch" and 2 BNC jacks. There are > several adjustment points accessible through the box. > > Google doesn't turn up anything. Anyone know what this beast is? > > Thanks! > John > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
Hi Dana -- I'm sure it's not an Rb (no heat sinking, and probably too old). I think it might be from a military HF receiver system (I have a vague recollection of that) but the part number looks vaguely HP-ish, so I dunno. On Jun 6, 2021, 10:48 AM, at 10:48 AM, Dana Whitlow wrote: >John, > >At least you seem to have enough info to power it up safely. From its >evident >complexity, I think it might well be a Rb standard. > >Dana > > >On Sun, Jun 6, 2021 at 9:23 AM John Ackermann N8UR >wrote: > >> Looking through the junk box I came upon a metal box labeled: >> >> Frequency Standard >> 05110-6014 >> Series 330 >> >> It's about 4 1/2 x 5 1/2 x 3 inches and has odd voltage inputs -- >-16V, >> +10V, -12.6V along with a terminal for "meter switch" and 2 BNC >jacks. >> There are several adjustment points accessible through the box. >> >> Google doesn't turn up anything. Anyone know what this beast is? >> >> Thanks! >> John >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >send >> an email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. >> >___ >time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >send an email to time-nuts-le...@lists.febo.com >To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: Help ID'ing Frequency Standard
John, At least you seem to have enough info to power it up safely. From its evident complexity, I think it might well be a Rb standard. Dana On Sun, Jun 6, 2021 at 9:23 AM John Ackermann N8UR wrote: > Looking through the junk box I came upon a metal box labeled: > > Frequency Standard > 05110-6014 > Series 330 > > It's about 4 1/2 x 5 1/2 x 3 inches and has odd voltage inputs -- -16V, > +10V, -12.6V along with a terminal for "meter switch" and 2 BNC jacks. > There are several adjustment points accessible through the box. > > Google doesn't turn up anything. Anyone know what this beast is? > > Thanks! > John > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
