Re: [time-nuts] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: It was very easy to fit the 10811A oven (HP 10811-60111) and get the oven working snip With the old TCXO in the frequency counter, the indicated frequency of the 10 GHz signal was about 48 kHz off, but it moved around a KHz or so. In contrast, now the oven is installed, the reading is a *lot* more stable, with it shifted about 15 Hz. This got me thinking. For anyone else owning a HP 5342A with a TCXO, it would be fairly trivial very cheap to fit a low cost ($20 or so) OCXO on a bit of strip board and it should improve the performance for very little money. The strip board would just plug in the same socket as the HP TCXO or OCXO. A cheap unit would not have the performance of a 10811A, but the price would be a lot lower than a used 10811A. 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Adrian, if you do not insist on a hp10811A, have a look at Gerrys site http://gerrysweeney.com/update-diy-hpagilent-53131a-010-high-stability-timebase-option-pcbs-available/ You can buy an assembled option 10 compatible OCXO modul for less than 100 GBP. I built DIY one with a PCB from Gerry using my Morion MV89 OCXO and it is working fine. Fully compatible with hp53131 calibration procedure. Götz Am 29.11.2014 22:19, : Is the upgrade similarly easy on a 53131A ? I realise that it needs to have an additional controller pcb but I have one of these counters fitted with option 001. The pcb holding the oscillator has an edge connector that looks suitable for a 10811A, and I have one to hand as well as a couple of compatible oscillators. I think I would need to remove the existing TCXO module - I haven't investigated too carefully yet but I think it's soldered in, and obstructs the mounting of the 10811A. On Sat, Nov 29, 2014 at 5:20 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. Dave It was very easy to fit the 10811A oven (HP 10811-60111) and get the oven working, although the oven is not powered when the counter is not switched on, even if there is power at the AC mains input. I can live with that. In fact, I prefer it to be honest. The procedure was 1) Remove top and bottom covers, which means the two front feet, plus 4 rear feet/protectors need to be removed. 2) Undo one screw at the top that held a board with a TCXO on it. The board plugs into a 15-pin edge connector. 3) Pull out the board (HP P/N 05341-60047) with the TCXO. The TCXO on the board is a marked DALE, TCXO-22-1, 0960-0394, 10.0MHz, SET 1.0Hz. (normally I would put a space between a number and the units, but I've written what is actually on the TCXO). 4) Attempt to insert the 10811A oscillator. This failed, as there were some wires around the optional board for GPIB which were restricting the space too much. So I had to cut a wire tie, and move the wires out the way. 5) Fitted 10811A at the top. 6) Invert the counter, and screw in the two screws which secure the 10811A to the chassis. For this I needed to temporarily move a ribbon cable, as the screw was below it. 7) Powered it up, and it worked. It shows OVN in the right of the LED display. Once that went out, it still took a minute or two for the readings to become pretty stable, although no doubt it will take months to become as good as it will get. I've not adjusted it yet, as I don't have any accurate frequency reference. But whilst the actual frequency indicated on the counter is different from what my signal generators are supposed to be producing, the last few digits (100, 10 and 1 Hz), are not all jumping around when seeing 10 GHz. The frequency indicated on the counter when connected to two different signal generators, which both have ovens of unknown type, are: 1) HP 83623A 20 GHz sweeper set to 10.0 GHz, fed into high frequency input of the frequency counter. HP 5342A counter indicates 10,000,000,690 Hz (relative difference = +6.9 10^-8) 2) HP 8656A set to 100 MHz, HP 5342A counter indicates 99,999,987 Hz (relative difference = -1.3 x 10^-7) With the old TCXO in the frequency counter, the indicated frequency of the 10 GHz signal was about 48 kHz off, but it moved around a KHz or so. In contrast, now the oven is installed, the reading is a *lot* more stable, with it shifted about 15 Hz. I don't currently know the absolute accurate any of the references in the test equipment are, but certainly the readings are a lot more stable after fitting the oven. I will need to get a GPSDO before adjusting any, but if nothing else, the short term stability of the oven is clearly superior to the TCXO. Long term should be too, but I can't determine that from what I have. 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. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
Re: [time-nuts] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Hi If you *need* portability, an internal oscillator is a good thing. If you want to fire something up fast, an OCXO is not a good choice. That’s a bit of a problem. A few real choices: 1) Get something like the LTE that locks up to GPS and runs right away. When portable, bring along a small GPS antenna. 2) Run a TCXO in the counter while portable and an external reference on the bench. 3) Power up the counter with internal OCXO the night before any “portable” measurements. There really aren’t a lot of other options unless you head off into the portable atomic clocks. Bob On Nov 30, 2014, at 11:08 AM, Götz Romahn go...@g-romahn.de wrote: Adrian, if you do not insist on a hp10811A, have a look at Gerrys site http://gerrysweeney.com/update-diy-hpagilent-53131a-010-high-stability-timebase-option-pcbs-available/ You can buy an assembled option 10 compatible OCXO modul for less than 100 GBP. I built DIY one with a PCB from Gerry using my Morion MV89 OCXO and it is working fine. Fully compatible with hp53131 calibration procedure. Götz Am 29.11.2014 22:19, : Is the upgrade similarly easy on a 53131A ? I realise that it needs to have an additional controller pcb but I have one of these counters fitted with option 001. The pcb holding the oscillator has an edge connector that looks suitable for a 10811A, and I have one to hand as well as a couple of compatible oscillators. I think I would need to remove the existing TCXO module - I haven't investigated too carefully yet but I think it's soldered in, and obstructs the mounting of the 10811A. On Sat, Nov 29, 2014 at 5:20 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. Dave It was very easy to fit the 10811A oven (HP 10811-60111) and get the oven working, although the oven is not powered when the counter is not switched on, even if there is power at the AC mains input. I can live with that. In fact, I prefer it to be honest. The procedure was 1) Remove top and bottom covers, which means the two front feet, plus 4 rear feet/protectors need to be removed. 2) Undo one screw at the top that held a board with a TCXO on it. The board plugs into a 15-pin edge connector. 3) Pull out the board (HP P/N 05341-60047) with the TCXO. The TCXO on the board is a marked DALE, TCXO-22-1, 0960-0394, 10.0MHz, SET 1.0Hz. (normally I would put a space between a number and the units, but I've written what is actually on the TCXO). 4) Attempt to insert the 10811A oscillator. This failed, as there were some wires around the optional board for GPIB which were restricting the space too much. So I had to cut a wire tie, and move the wires out the way. 5) Fitted 10811A at the top. 6) Invert the counter, and screw in the two screws which secure the 10811A to the chassis. For this I needed to temporarily move a ribbon cable, as the screw was below it. 7) Powered it up, and it worked. It shows OVN in the right of the LED display. Once that went out, it still took a minute or two for the readings to become pretty stable, although no doubt it will take months to become as good as it will get. I've not adjusted it yet, as I don't have any accurate frequency reference. But whilst the actual frequency indicated on the counter is different from what my signal generators are supposed to be producing, the last few digits (100, 10 and 1 Hz), are not all jumping around when seeing 10 GHz. The frequency indicated on the counter when connected to two different signal generators, which both have ovens of unknown type, are: 1) HP 83623A 20 GHz sweeper set to 10.0 GHz, fed into high frequency input of the frequency counter. HP 5342A counter indicates 10,000,000,690 Hz (relative difference = +6.9 10^-8) 2) HP 8656A set to 100 MHz, HP 5342A counter indicates 99,999,987 Hz (relative difference = -1.3 x 10^-7) With the old TCXO in the frequency counter, the indicated frequency of the 10 GHz signal was about 48 kHz off, but it moved around a KHz or so. In contrast, now the oven is installed, the reading is a *lot* more stable, with it shifted about 15 Hz. I don't currently know the absolute accurate any of the references in the test equipment are, but certainly the readings are a lot more stable after fitting the oven. I will need to get a GPSDO before
Re: [time-nuts] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
I've seen Gerry's board and might well fit one to another counter. However, this already has a suitable board - in fact, it appears it is an oven, not a tcxo. Presumably just not as good an oven. The point is, it looks ready to receive a 10811A. In fact, consulting the assembly-level service guide does seem to confirm that it uses an Isotech oven for medium stability or one of two 10811 variants for high and ultrahigh stability. Since the 10811A I have is an older model, neither 10811-60160 or 10811-60260, is it likely I'll get any improvment over the Isotech 1813-0931 ? Photos of the board : https://www.dropbox.com/s/w4nngyz1qp70skv/P1280343.JPG?dl=0 https://www.dropbox.com/s/ifjcx6xzz90vlja/P1280344.JPG?dl=0 On Sun, Nov 30, 2014 at 4:38 PM, Bob Camp kb...@n1k.org wrote: Hi If you *need* portability, an internal oscillator is a good thing. If you want to fire something up fast, an OCXO is not a good choice. That's a bit of a problem. A few real choices: 1) Get something like the LTE that locks up to GPS and runs right away. When portable, bring along a small GPS antenna. 2) Run a TCXO in the counter while portable and an external reference on the bench. 3) Power up the counter with internal OCXO the night before any portable measurements. There really aren't a lot of other options unless you head off into the portable atomic clocks. Bob On Nov 30, 2014, at 11:08 AM, Götz Romahn go...@g-romahn.de wrote: Adrian, if you do not insist on a hp10811A, have a look at Gerrys site http://gerrysweeney.com/update-diy-hpagilent-53131a-010-high-stability-timebase-option-pcbs-available/ You can buy an assembled option 10 compatible OCXO modul for less than 100 GBP. I built DIY one with a PCB from Gerry using my Morion MV89 OCXO and it is working fine. Fully compatible with hp53131 calibration procedure. Götz Am 29.11.2014 22:19, : Is the upgrade similarly easy on a 53131A ? I realise that it needs to have an additional controller pcb but I have one of these counters fitted with option 001. The pcb holding the oscillator has an edge connector that looks suitable for a 10811A, and I have one to hand as well as a couple of compatible oscillators. I think I would need to remove the existing TCXO module - I haven't investigated too carefully yet but I think it's soldered in, and obstructs the mounting of the 10811A. On Sat, Nov 29, 2014 at 5:20 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. Dave It was very easy to fit the 10811A oven (HP 10811-60111) and get the oven working, although the oven is not powered when the counter is not switched on, even if there is power at the AC mains input. I can live with that. In fact, I prefer it to be honest. The procedure was 1) Remove top and bottom covers, which means the two front feet, plus 4 rear feet/protectors need to be removed. 2) Undo one screw at the top that held a board with a TCXO on it. The board plugs into a 15-pin edge connector. 3) Pull out the board (HP P/N 05341-60047) with the TCXO. The TCXO on the board is a marked DALE, TCXO-22-1, 0960-0394, 10.0MHz, SET 1.0Hz. (normally I would put a space between a number and the units, but I've written what is actually on the TCXO). 4) Attempt to insert the 10811A oscillator. This failed, as there were some wires around the optional board for GPIB which were restricting the space too much. So I had to cut a wire tie, and move the wires out the way. 5) Fitted 10811A at the top. 6) Invert the counter, and screw in the two screws which secure the 10811A to the chassis. For this I needed to temporarily move a ribbon cable, as the screw was below it. 7) Powered it up, and it worked. It shows OVN in the right of the LED display. Once that went out, it still took a minute or two for the readings to become pretty stable, although no doubt it will take months to become as good as it will get. I've not adjusted it yet, as I don't have any accurate frequency reference. But whilst the actual frequency indicated on the counter is different from what my signal generators are supposed to be producing, the last few digits (100, 10 and 1 Hz), are not all jumping around when seeing 10 GHz. The frequency indicated on the counter when connected to two different signal generators, which both have ovens of
Re: [time-nuts] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. Dave It was very easy to fit the 10811A oven (HP 10811-60111) and get the oven working, although the oven is not powered when the counter is not switched on, even if there is power at the AC mains input. I can live with that. In fact, I prefer it to be honest. The procedure was 1) Remove top and bottom covers, which means the two front feet, plus 4 rear feet/protectors need to be removed. 2) Undo one screw at the top that held a board with a TCXO on it. The board plugs into a 15-pin edge connector. 3) Pull out the board (HP P/N 05341-60047) with the TCXO. The TCXO on the board is a marked DALE, TCXO-22-1, 0960-0394, 10.0MHz, SET 1.0Hz. (normally I would put a space between a number and the units, but I've written what is actually on the TCXO). 4) Attempt to insert the 10811A oscillator. This failed, as there were some wires around the optional board for GPIB which were restricting the space too much. So I had to cut a wire tie, and move the wires out the way. 5) Fitted 10811A at the top. 6) Invert the counter, and screw in the two screws which secure the 10811A to the chassis. For this I needed to temporarily move a ribbon cable, as the screw was below it. 7) Powered it up, and it worked. It shows OVN in the right of the LED display. Once that went out, it still took a minute or two for the readings to become pretty stable, although no doubt it will take months to become as good as it will get. I've not adjusted it yet, as I don't have any accurate frequency reference. But whilst the actual frequency indicated on the counter is different from what my signal generators are supposed to be producing, the last few digits (100, 10 and 1 Hz), are not all jumping around when seeing 10 GHz. The frequency indicated on the counter when connected to two different signal generators, which both have ovens of unknown type, are: 1) HP 83623A 20 GHz sweeper set to 10.0 GHz, fed into high frequency input of the frequency counter. HP 5342A counter indicates 10,000,000,690 Hz (relative difference = +6.9 10^-8) 2) HP 8656A set to 100 MHz, HP 5342A counter indicates 99,999,987 Hz (relative difference = -1.3 x 10^-7) With the old TCXO in the frequency counter, the indicated frequency of the 10 GHz signal was about 48 kHz off, but it moved around a KHz or so. In contrast, now the oven is installed, the reading is a *lot* more stable, with it shifted about 15 Hz. I don't currently know the absolute accurate any of the references in the test equipment are, but certainly the readings are a lot more stable after fitting the oven. I will need to get a GPSDO before adjusting any, but if nothing else, the short term stability of the oven is clearly superior to the TCXO. Long term should be too, but I can't determine that from what I have. 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Is the upgrade similarly easy on a 53131A ? I realise that it needs to have an additional controller pcb but I have one of these counters fitted with option 001. The pcb holding the oscillator has an edge connector that looks suitable for a 10811A, and I have one to hand as well as a couple of compatible oscillators. I think I would need to remove the existing TCXO module - I haven't investigated too carefully yet but I think it's soldered in, and obstructs the mounting of the 10811A. On Sat, Nov 29, 2014 at 5:20 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. Dave It was very easy to fit the 10811A oven (HP 10811-60111) and get the oven working, although the oven is not powered when the counter is not switched on, even if there is power at the AC mains input. I can live with that. In fact, I prefer it to be honest. The procedure was 1) Remove top and bottom covers, which means the two front feet, plus 4 rear feet/protectors need to be removed. 2) Undo one screw at the top that held a board with a TCXO on it. The board plugs into a 15-pin edge connector. 3) Pull out the board (HP P/N 05341-60047) with the TCXO. The TCXO on the board is a marked DALE, TCXO-22-1, 0960-0394, 10.0MHz, SET 1.0Hz. (normally I would put a space between a number and the units, but I've written what is actually on the TCXO). 4) Attempt to insert the 10811A oscillator. This failed, as there were some wires around the optional board for GPIB which were restricting the space too much. So I had to cut a wire tie, and move the wires out the way. 5) Fitted 10811A at the top. 6) Invert the counter, and screw in the two screws which secure the 10811A to the chassis. For this I needed to temporarily move a ribbon cable, as the screw was below it. 7) Powered it up, and it worked. It shows OVN in the right of the LED display. Once that went out, it still took a minute or two for the readings to become pretty stable, although no doubt it will take months to become as good as it will get. I've not adjusted it yet, as I don't have any accurate frequency reference. But whilst the actual frequency indicated on the counter is different from what my signal generators are supposed to be producing, the last few digits (100, 10 and 1 Hz), are not all jumping around when seeing 10 GHz. The frequency indicated on the counter when connected to two different signal generators, which both have ovens of unknown type, are: 1) HP 83623A 20 GHz sweeper set to 10.0 GHz, fed into high frequency input of the frequency counter. HP 5342A counter indicates 10,000,000,690 Hz (relative difference = +6.9 10^-8) 2) HP 8656A set to 100 MHz, HP 5342A counter indicates 99,999,987 Hz (relative difference = -1.3 x 10^-7) With the old TCXO in the frequency counter, the indicated frequency of the 10 GHz signal was about 48 kHz off, but it moved around a KHz or so. In contrast, now the oven is installed, the reading is a *lot* more stable, with it shifted about 15 Hz. I don't currently know the absolute accurate any of the references in the test equipment are, but certainly the readings are a lot more stable after fitting the oven. I will need to get a GPSDO before adjusting any, but if nothing else, the short term stability of the oven is clearly superior to the TCXO. Long term should be too, but I can't determine that from what I have. 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.
[time-nuts] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Just remove the TCXO the 10811 just plugs in, you will need to add the heater oven indicator wiring and LED indicator which is usually over the power switch The power supply includes the oven supply already Content by Scott Typos by Siri On Nov 27, 2014, at 5:38 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Just remove the TCXO the 10811 just plugs in Note that there are many different versions of the 10811. I am familiar with at least two incompatible mechanical configurations: one is connectorized and the other is not. Didier KO4BB On Thu, Nov 27, 2014 at 5:43 PM, Scott McGrath scmcgr...@gmail.com wrote: Just remove the TCXO the 10811 just plugs in, you will need to add the heater oven indicator wiring and LED indicator which is usually over the power switch The power supply includes the oven supply already Content by Scott Typos by Siri On Nov 27, 2014, at 5:38 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. 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. ___ 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Hi In this case I suspect he’s referring to the version with the edge connector on it. That’s the one most instruments use rather than the connector only version or the “double oven” version. I believe that makes it a 10811A rather than a 10811B. There are a multitude of details here: https://www.febo.com/pages/hp10811/HP10811AB-Manual.pdf There are indeed other versions that came out after the manual. Bob On Nov 27, 2014, at 5:48 PM, Didier Juges shali...@gmail.com wrote: Just remove the TCXO the 10811 just plugs in Note that there are many different versions of the 10811. I am familiar with at least two incompatible mechanical configurations: one is connectorized and the other is not. Didier KO4BB On Thu, Nov 27, 2014 at 5:43 PM, Scott McGrath scmcgr...@gmail.com wrote: Just remove the TCXO the 10811 just plugs in, you will need to add the heater oven indicator wiring and LED indicator which is usually over the power switch The power supply includes the oven supply already Content by Scott Typos by Siri On Nov 27, 2014, at 5:38 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. 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. ___ 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
You are correct I was referring to the 'instrument' version of the 10811A with the edge connector. There are a lot of 10811A variants out there but the edge connector version was used in most HP instruments with an ovenized time base of that vintage. It's worth buying dead option 1 instruments as they will have either a 10544 or 10811A as the time base mount point and electronic interface are standardized so upgrades are easy. Content by Scott Typos by Siri On Nov 27, 2014, at 7:01 PM, Bob Camp kb...@n1k.org wrote: Hi In this case I suspect he’s referring to the version with the edge connector on it. That’s the one most instruments use rather than the connector only version or the “double oven” version. I believe that makes it a 10811A rather than a 10811B. There are a multitude of details here: https://www.febo.com/pages/hp10811/HP10811AB-Manual.pdf There are indeed other versions that came out after the manual. Bob On Nov 27, 2014, at 5:48 PM, Didier Juges shali...@gmail.com wrote: Just remove the TCXO the 10811 just plugs in Note that there are many different versions of the 10811. I am familiar with at least two incompatible mechanical configurations: one is connectorized and the other is not. Didier KO4BB On Thu, Nov 27, 2014 at 5:43 PM, Scott McGrath scmcgr...@gmail.com wrote: Just remove the TCXO the 10811 just plugs in, you will need to add the heater oven indicator wiring and LED indicator which is usually over the power switch The power supply includes the oven supply already Content by Scott Typos by Siri On Nov 27, 2014, at 5:38 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. 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. ___ 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Hi On Nov 27, 2014, at 6:31 PM, Scott McGrath scmcgr...@gmail.com wrote: You are correct I was referring to the 'instrument' version of the 10811A with the edge connector. There are a lot of 10811A variants out there but the edge connector version was used in most HP instruments with an ovenized time base of that vintage. It's worth buying dead option 1 instruments as they will have either a 10544 or 10811A as the time base mount point and electronic interface are standardized so upgrades are easy. That of course *assumes* that the OCXO is still in there. Most of the time it’s still there. I’ve seen a couple of sellers who (maybe) “part out” dead gear. It may have been done upstream of them, who knows. Bob Content by Scott Typos by Siri On Nov 27, 2014, at 7:01 PM, Bob Camp kb...@n1k.org wrote: Hi In this case I suspect he’s referring to the version with the edge connector on it. That’s the one most instruments use rather than the connector only version or the “double oven” version. I believe that makes it a 10811A rather than a 10811B. There are a multitude of details here: https://www.febo.com/pages/hp10811/HP10811AB-Manual.pdf There are indeed other versions that came out after the manual. Bob On Nov 27, 2014, at 5:48 PM, Didier Juges shali...@gmail.com wrote: Just remove the TCXO the 10811 just plugs in Note that there are many different versions of the 10811. I am familiar with at least two incompatible mechanical configurations: one is connectorized and the other is not. Didier KO4BB On Thu, Nov 27, 2014 at 5:43 PM, Scott McGrath scmcgr...@gmail.com wrote: Just remove the TCXO the 10811 just plugs in, you will need to add the heater oven indicator wiring and LED indicator which is usually over the power switch The power supply includes the oven supply already Content by Scott Typos by Siri On Nov 27, 2014, at 5:38 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. 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. ___ 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.
