Re: [time-nuts] 10MHz to 80MHz frequency multiplier suggestions
Am 31.01.2011 22:48, schrieb dave powis: Hi Chris, Yes, of course the multiplication plan is a little different, but in the circuit I linked the basic multiplier is a doubler from 10 to 20MHz, that produces a comb of 2f products. The design as presented has BPF's to select the 5th harmonic, and I was simply suggesting that by replacing these with 80MHz BPF's the same simple circuit would also be useful for the other respondent who wanted that frequency rather than 100MHz. As Rick has subsequently suggested, 3 cascaded doublers would achieve the 80MHz requirement very well, but of course they will not solve the 100MHz problem. For 100MHz you can easily do it in two diode multipliers - one to 50MHz (x5) and a doubler to 100MHz. But that's now two diffferent circuits, and I was looking at the $10 option.. I don't like this frequency multiplying idea. I've just tried a 10->5->35 MHz multiplier for a DG8SAQ VNWA and the filtering was much more work than anticipated. (and 10-> 30 MHZetc) . -60 dB is nothing in a SDR with a dynamic range approaching 100 dB. By carefully multiplying a state-of-the-art 10 MHz source, you can be better by some dB close to the carrier, but far off you loose big time. * 10 in frequency will cost 20 dB in noise floor, probably more. So from -178 dBm/sqrt Hz you are _UP_ to -158. That's not bad, but nothing to write home about. The best thing to do is a 80 or 100 MHz crystal VCXO . This will give you an acceptable noise floor. If You lock to a quality 10 MHz source, you can transfer the low close-to- the-carrier phase noise of the source to the 100 MHz osc, as far as it's in the pll bandwidth. But that means quite an effort and may not be worth it if you have a decent 100 MHz VCXO. In fact, one can easily mess it up without the right tools. (signal source analyzer...) For starters, I would lock the 100 MHz with a low bandwidth loop to the 10 MHz. No 10 MHz-harmonics in the output and no filter tuning nightmare... Harmonics of the 100 MHz don't care, you may have to square it up for the ADC anyway. I'm well aware that time nuts is probably the very worst reflector on which to post a 'simple' solution! However, it was, as I thought I had made abundantly clear, my thoughts for the $10 solution - I fully accept Bruces' comments about the ACMOS jitter issues, and as always it is up to the user to do his own homework as to suitability. There is no fundamental law that makes ACMOS look bad. In fact, your LTC2208 or whatever ADC is low voltage CMOS, too. The diagram in (1) shows FAST and AC dividers at <150 db/sqrt Hz at 10 Hz offset. I would like to see an osc at 100 Mhz or multiplied 10 MHz that can do that. I'm also aware that it is very easy to become 'over-focussed' on specs, and forget what the original job was to do! Since neither respondent was specific about what they are trying to measure or receive with their SDR's, or the ADC to be used, no-one can give meaningful guidance, but there are many who can tell you the best way to do it! I'm coming from the position that Robert Watson-Watt, of UK radar development fame, held - of course everyone wants the best, but that will take forever/be expensive. They would be very happy, and probably not tell the difference from that if given the second-best solution - so he aimed to deliver the third-best solution as a starter, and work towards second-best, on the basis that this would have 'something operational' in the shortest time. exactly. 73, Gerhard, DK4XP (1) James A. Crawford, Frequency Synthesizer Design Handbook, Artech House, pg. 81 ___ 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] Austron 1150
Does any one have information on the Austron 1150 oscillator? I am considering using it as an offset oscillator for a dual mixer so Allan Deviation, aging and temperature stability would be of help. Thank you BertKehren ___ 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] 10MHz to 80MHz frequency multiplier suggestions
> > Before one can conclude such a solution is adequate one needs to know > the ADC requirements for clock jitter. > If the ADC is a high resolution pipelined ADC like those available from > AD and LTC then such a solution will degrade the performance > significantly. > These ADCs require clock cycle to cycle jitter of a few tens of femtosec > or less to realise the datasheet performance. Actually it's better (worse?) than that, for two reasons: 1) none of those ADCs can take advantage of a clock noise floor much better than -150 dBc/Hz, and 2) the clock noise is improved by 20*log(clock/input). That means an HF receiver like the Perseus will be able to shrug off some or all of the noise added by the multiplier, depending on where you tune it. > The intrinsic jitter of an ACMOS gate is too high by a factor of > 20 or more. For an HF source, -133 dBc/Hz is a very small amount of phase noise at 1 Hz. For comparison, both the HP 10811 and later-model Thunderbolt OCXOs are in the -100 to -110 dBc/Hz neighborhood at 1 Hz. The residual PN of a 74AC04 is about -135 dBc/Hz at 1 Hz, measured on a 10 MHz carrier(1). The TSC 5115A, whose ADCs are from the same basic family as the one in the Perseus, has a (non-correlated) 1-Hz measurement floor of -133 dBc/Hz(2). Bottom line: if you use reasonable construction practices and maintain a high signal level throughout the chain, I don't think there is much to worry about when driving an ADC with a 10 MHz->80 MHz multiplier. I would worry more about spurs than noise. (1) http://www.ke5fx.com/ac.htm (2) http://www.symmetricom.com/link.cfm?lid=6156 -- john, KE5FX ___ 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] 10MHz to 80MHz frequency multiplier suggestions
Gerhard Hoffmann wrote: Am 31.01.2011 22:48, schrieb dave powis: Hi Chris, Yes, of course the multiplication plan is a little different, but in the circuit I linked the basic multiplier is a doubler from 10 to 20MHz, that produces a comb of 2f products. The design as presented has BPF's to select the 5th harmonic, and I was simply suggesting that by replacing these with 80MHz BPF's the same simple circuit would also be useful for the other respondent who wanted that frequency rather than 100MHz. As Rick has subsequently suggested, 3 cascaded doublers would achieve the 80MHz requirement very well, but of course they will not solve the 100MHz problem. For 100MHz you can easily do it in two diode multipliers - one to 50MHz (x5) and a doubler to 100MHz. But that's now two diffferent circuits, and I was looking at the $10 option.. I don't like this frequency multiplying idea. I've just tried a 10->5->35 MHz multiplier for a DG8SAQ VNWA and the filtering was much more work than anticipated. (and 10-> 30 MHZetc) . -60 dB is nothing in a SDR with a dynamic range approaching 100 dB. By carefully multiplying a state-of-the-art 10 MHz source, you can be better by some dB close to the carrier, but far off you loose big time. * 10 in frequency will cost 20 dB in noise floor, probably more. So from -178 dBm/sqrt Hz you are _UP_ to -158. That's not bad, but nothing to write home about. The best thing to do is a 80 or 100 MHz crystal VCXO . This will give you an acceptable noise floor. If You lock to a quality 10 MHz source, you can transfer the low close-to- the-carrier phase noise of the source to the 100 MHz osc, as far as it's in the pll bandwidth. But that means quite an effort and may not be worth it if you have a decent 100 MHz VCXO. In fact, one can easily mess it up without the right tools. (signal source analyzer...) For starters, I would lock the 100 MHz with a low bandwidth loop to the 10 MHz. No 10 MHz-harmonics in the output and no filter tuning nightmare... Harmonics of the 100 MHz don't care, you may have to square it up for the ADC anyway. If you use a CMOS divider using CMOS devices (as dividers etc) then the close in phase noise floor will be degraded significantly over that achievable with either ECL or regenerative dividers. More data on the close in phase noise of the ADC itself is necessary to decide if the effect is significant. It may be simpler just to compare the results when using a CMOS feedback divider (and phase detector) with that achieved with a diode mixer based phase detector and regenerative feedback divider. I'm well aware that time nuts is probably the very worst reflector on which to post a 'simple' solution! However, it was, as I thought I had made abundantly clear, my thoughts for the $10 solution - I fully accept Bruces' comments about the ACMOS jitter issues, and as always it is up to the user to do his own homework as to suitability. There is no fundamental law that makes ACMOS look bad. In fact, your LTC2208 or whatever ADC is low voltage CMOS, too. Try using an 74AC04 inverter to drive the clock input of an LTC2208 and watch the noise floor rise compared to using a low phase floor noise sinewave clock. The cycle to cycle sampling jitter will be way above the 70fs that the LTC2208 is capable of. Whilst it may be possible to manufacture a CMOS inverter that has sufficiently low jitter to minimally degrade the jitter specs of the LTC2208 the 74ACxx family is too noisy. The diagram in (1) shows FAST and AC dividers at <150 db/sqrt Hz at 10 Hz offset. I would like to see an osc at 100 Mhz or multiplied 10 MHz that can do that. I'm also aware that it is very easy to become 'over-focussed' on specs, and forget what the original job was to do! Since neither respondent was specific about what they are trying to measure or receive with their SDR's, or the ADC to be used, no-one can give meaningful guidance, but there are many who can tell you the best way to do it! I'm coming from the position that Robert Watson-Watt, of UK radar development fame, held - of course everyone wants the best, but that will take forever/be expensive. They would be very happy, and probably not tell the difference from that if given the second-best solution - so he aimed to deliver the third-best solution as a starter, and work towards second-best, on the basis that this would have 'something operational' in the shortest time. exactly. 73, Gerhard, DK4XP (1) James A. Crawford, Frequency Synthesizer Design Handbook, Artech House, pg. 81 Bruce ___ 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] 10MHz to 80MHz frequency multiplier suggestions
Whilst the close in phase noise of the ADC used in the TSC5115 may be comparable with that of a 74AC04 the phase noise floor of such ADCs is degraded when clocked by a 74AC04: http://www.analog.com/static/imported-files/seminars_webcasts/High%20Speed%20System%20Applications%20%28PDF%29/HS%20Systems%20Part%202%20for%20Print_A.pdf http://www.analog.com/static/imported-files/application_notes/5847948184484445938457260443675626756108420567021238941550065879349464383423509029308534504114752208671024345AN_756_0.pdf http://www.analog.com/static/imported-files/application_notes/57206466474685142207552745732150239440755569051663372515871138132239AN_835_0.pdf http://www.analog.com/static/imported-files/application_notes/59756494064912342505447175991257024546937062255921511183854180687755AN501_a.pdf In particular such ADCs have been be used to measure the jitter of various logic families by using devices from the logic family to drive the ADC clcok /encode inputs and comparing the increased noise floor with that when the ADC clock/encode inputs are driven with a bandpass filtered low phase noise sine wave. Bruce John Miles wrote: Before one can conclude such a solution is adequate one needs to know the ADC requirements for clock jitter. If the ADC is a high resolution pipelined ADC like those available from AD and LTC then such a solution will degrade the performance significantly. These ADCs require clock cycle to cycle jitter of a few tens of femtosec or less to realise the datasheet performance. Actually it's better (worse?) than that, for two reasons: 1) none of those ADCs can take advantage of a clock noise floor much better than -150 dBc/Hz, and 2) the clock noise is improved by 20*log(clock/input). That means an HF receiver like the Perseus will be able to shrug off some or all of the noise added by the multiplier, depending on where you tune it. The intrinsic jitter of an ACMOS gate is too high by a factor of 20 or more. For an HF source, -133 dBc/Hz is a very small amount of phase noise at 1 Hz. For comparison, both the HP 10811 and later-model Thunderbolt OCXOs are in the -100 to -110 dBc/Hz neighborhood at 1 Hz. The residual PN of a 74AC04 is about -135 dBc/Hz at 1 Hz, measured on a 10 MHz carrier(1). The TSC 5115A, whose ADCs are from the same basic family as the one in the Perseus, has a (non-correlated) 1-Hz measurement floor of -133 dBc/Hz(2). Bottom line: if you use reasonable construction practices and maintain a high signal level throughout the chain, I don't think there is much to worry about when driving an ADC with a 10 MHz->80 MHz multiplier. I would worry more about spurs than noise. (1) http://www.ke5fx.com/ac.htm (2) http://www.symmetricom.com/link.cfm?lid=6156 -- john, KE5FX ___ 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] Austron 1150
ewkeh...@aol.com wrote: Does any one have information on the Austron 1150 oscillator? I am considering using it as an offset oscillator for a dual mixer so Allan Deviation, aging and temperature stability would be of help. Thank you BertKehren ___ The Austron 1250A uses an Austron 1150A as its OCXO. ADEV plots for an Auston 1250A are shown at: http://www.febo.com/pages/oscillators/austron1250a/ Bruce ___ 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] Austron 1150
Bruce Griffiths wrote: ewkeh...@aol.com wrote: Does any one have information on the Austron 1150 oscillator? I am considering using it as an offset oscillator for a dual mixer so Allan Deviation, aging and temperature stability would be of help. Thank you BertKehren ___ The Austron 1250A uses an Austron 1150A as its OCXO. ADEV plots for an Auston 1250A are shown at: http://www.febo.com/pages/oscillators/austron1250a/ Bruce Aging and tempco specs can be found in the 1250A manual: http://www.to-way.com/tf/1250a.pdf Bruce ___ 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] Austron 1150
Thanks Bruce, how is the Dual Mixer/Counter doing I am releasing the hopefully last version? Any input would be appreciated. Bert -Original Message- From: Bruce Griffiths To: Discussion of precise time and frequency measurement Sent: Tue, Feb 1, 2011 6:42 am Subject: Re: [time-nuts] Austron 1150 Bruce Griffiths wrote: > ewkeh...@aol.com wrote: >> Does any one have information on the Austron 1150 oscillator? I am >> considering using it as an offset oscillator for a dual mixer so >> Allan >> Deviation, >> aging and temperature stability would be of help. >> Thank you Bert Kehren >> ___ > The Austron 1250A uses an Austron 1150A as its OCXO. > > ADEV plots for an Auston 1250A are shown at: > http://www.febo.com/pages/oscillators/austron1250a/ > > Bruce > > Aging and tempco specs can be found in the 1250A manual: http://www.to-way.com/tf/1250a.pdf Bruce ___ 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] 5370B s/n prefixes
Hi, 10811 was standard. A basic (I think just a TTL "can") was an option. This was for users with external standards. Robert G8RPI. --- On Mon, 31/1/11, Pete Lancashire wrote: From: Pete Lancashire Subject: [time-nuts] 5370B s/n prefixes To: "Discussion of precise time and frequency measurement" Date: Monday, 31 January, 2011, 22:32 The online manual I found via ... ends at 2311 The unit I purchased is 2602 Is there a more recent online manual ? and if not where there any versions after 2602 ? The other thing I found was it does not have an opt 001 label/tag but it has a 10811 -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. ___ 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] 10MHz to 80MHz frequency multiplier suggestions
Hi Another way to filp that around is that the same ADC's begin to degrade if the broadband phase noise isn't at least in the 150's. With an 18 db penalty for multiplying, that puts you into the 170's for phase noise out of the TBolt. Even if the TBolt OCXO is that good (doubtful) building a multiplier chain with that sort of floor is a *very* difficult thing to do. Bob On Feb 1, 2011, at 5:19 AM, John Miles wrote: > >> >> Before one can conclude such a solution is adequate one needs to know >> the ADC requirements for clock jitter. >> If the ADC is a high resolution pipelined ADC like those available from >> AD and LTC then such a solution will degrade the performance >> significantly. >> These ADCs require clock cycle to cycle jitter of a few tens of femtosec >> or less to realise the datasheet performance. > > Actually it's better (worse?) than that, for two reasons: 1) none of those > ADCs can take advantage of a clock noise floor much better than -150 dBc/Hz, > and 2) the clock noise is improved by 20*log(clock/input). That means an HF > receiver like the Perseus will be able to shrug off some or all of the noise > added by the multiplier, depending on where you tune it. > >> The intrinsic jitter of an ACMOS gate is too high by a factor of >> 20 or more. > > For an HF source, -133 dBc/Hz is a very small amount of phase noise at 1 Hz. > For comparison, both the HP 10811 and later-model Thunderbolt OCXOs are in > the -100 to -110 dBc/Hz neighborhood at 1 Hz. > > The residual PN of a 74AC04 is about -135 dBc/Hz at 1 Hz, measured on a 10 > MHz carrier(1). The TSC 5115A, whose ADCs are from the same basic family as > the one in the Perseus, has a (non-correlated) 1-Hz measurement floor > of -133 dBc/Hz(2). > > Bottom line: if you use reasonable construction practices and maintain a > high signal level throughout the chain, I don't think there is much to worry > about when driving an ADC with a 10 MHz->80 MHz multiplier. I would worry > more about spurs than noise. > > (1) http://www.ke5fx.com/ac.htm > (2) http://www.symmetricom.com/link.cfm?lid=6156 > > -- john, KE5FX > > > ___ > 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] 10MHz to 80MHz frequency multiplier suggestions
> Whilst the close in phase noise of the ADC used in the TSC5115 may be > comparable with that of a 74AC04 the phase noise floor of such ADCs is > degraded when clocked by a 74AC04... > In particular such ADCs have been be used to measure the jitter of > various logic families by using devices from the logic family to drive > the ADC clcok /encode inputs and comparing the increased noise floor > with that when the ADC clock/encode inputs are driven with a bandpass > filtered low phase noise sine wave. The AC gate will definitely get noisier towards 100 MHz than at 10 MHz where I ran most of my measurements. It would be hard to measure the contribution of a 74AC gate at 10 MHz with one of these ADCs, but yes -- if you put it in the clock path it will degrade the performance of a ULN oscillator noticeably. It's worth keeping the Perseus's stock frequency reference in mind, though. The performance tests in the Analog app notes assume the use of an oscillator that costs >2x what the whole receiver does. So... will the output of an 80 MHz multiplier based on cascaded 74AC stages be noisier than the $10 80 MHz oscillator that came with the receiver? I'm guessing not. When I measured the 74AC04 at 100 MHz, its residual noise crossed the -150 dBc/Hz line between 1 and 3 kHz, so it probably would not degrade anything much noisier than a Sprinter-class OCXO. -- john, KE5FX ___ 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] Austron 1150
"Does any one have information on the Austron 1150 oscillator?" I have seen 2 different variations of this oscillator. There is one that was used in the 1210D standard that has a BNC connector besides the 9-pin connector and this unit has EFC input on the 9-pin connector. The second does not have the BNC connector and also does not have any EFC capability, just a screw adjustment. The specs may differ as well but both are pretty good oscillators. -Arthur ___ 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] Austron 1150
Arthur I have the both, the screwdriver adjust only will probably make a good offset for the Dual Mixer. I just checked one, it tunes 3 Hz down and 1.5 Hz up In a message dated 2/1/2011 9:39:08 A.M. Eastern Standard Time, golgarfrinc...@yahoo.com writes: "Does any one have information on the Austron 1150 oscillator?" I have seen 2 different variations of this oscillator. There is one that was used in the 1210D standard that has a BNC connector besides the 9-pin connector and this unit has EFC input on the 9-pin connector. The second does not have the BNC connector and also does not have any EFC capability, just a screw adjustment. The specs may differ as well but both are pretty good oscillators. -Arthur ___ 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] 5370B s/n prefixes
One option was an ECL gate oscillator with a crstal in a T05 sized can. TTL output oscillators of that era had too much jitter to be useful even for short time intervals. Bruce Robert Atkinson wrote: Hi, 10811 was standard. A basic (I think just a TTL "can") was an option. This was for users with external standards. Robert G8RPI. --- On Mon, 31/1/11, Pete Lancashire wrote: From: Pete Lancashire Subject: [time-nuts] 5370B s/n prefixes To: "Discussion of precise time and frequency measurement" Date: Monday, 31 January, 2011, 22:32 The online manual I found via ... ends at 2311 The unit I purchased is 2602 Is there a more recent online manual ? and if not where there any versions after 2602 ? The other thing I found was it does not have an opt 001 label/tag but it has a 10811 -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. ___ 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] 5370B s/n prefixes
this being my first working 10811, I'd like to play with it. Since I'm setting up the benches to use the eventually distributed output from a T'bolt. I'm thinking of playing with it on its own and run the 5370B externally. Hopefully not to bad of an idea. So whats in the 5370B would just be for 'does it work or not' when not running externally. On Tue, Feb 1, 2011 at 10:32 AM, Bruce Griffiths wrote: > One option was an ECL gate oscillator with a crstal in a T05 sized can. > TTL output oscillators of that era had too much jitter to be useful even for > short time intervals. > > Bruce > > Robert Atkinson wrote: >> >> Hi, >> 10811 was standard. A basic (I think just a TTL "can") was an option. This >> was for users with external standards. >> Robert G8RPI. >> >> --- On Mon, 31/1/11, Pete Lancashire wrote: >> >> >> From: Pete Lancashire >> Subject: [time-nuts] 5370B s/n prefixes >> To: "Discussion of precise time and frequency >> measurement" >> Date: Monday, 31 January, 2011, 22:32 >> >> >> The online manual I found via ... ends at 2311 >> >> The unit I purchased is 2602 >> >> Is there a more recent online manual ? and if not where there any >> versions after 2602 ? >> >> The other thing I found was it does not have an opt 001 label/tag but >> it has a 10811 >> >> -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. >> >> >> >> >> ___ >> 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] Austron 1150
Hi Bert it is around I have a 1MHz version so I got the sheet from somewhere. I am just doing a sweep of my machine...it may be on an old disc..my filing system is "chaotic" to say the least!..if the worst comes to the worst and nobody else comes up with it I can always rescan the paper print I have with the osc. Alan G3NYK - Original Message - From: To: Sent: Tuesday, February 01, 2011 9:56 AM Subject: [time-nuts] Austron 1150 > Does any one have information on the Austron 1150 oscillator? I am > considering using it as an offset oscillator for a dual mixer so Allan Deviation, > aging and temperature stability would be of help. > Thank you BertKehren > ___ > 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] Austron 1150
Thank you Allen, I think I have enough. Unless there are some more Allan Variance plots. Every thing else is well covered. Bert Kehren In a message dated 2/1/2011 4:06:58 P.M. Eastern Standard Time, alan.me...@btinternet.com writes: Hi Bert it is around I have a 1MHz version so I got the sheet from somewhere. I am just doing a sweep of my machine...it may be on an old disc..my filing system is "chaotic" to say the least!..if the worst comes to the worst and nobody else comes up with it I can always rescan the paper print I have with the osc. Alan G3NYK - Original Message - From: To: Sent: Tuesday, February 01, 2011 9:56 AM Subject: [time-nuts] Austron 1150 > Does any one have information on the Austron 1150 oscillator? I am > considering using it as an offset oscillator for a dual mixer so Allan Deviation, > aging and temperature stability would be of help. > Thank you BertKehren > ___ > 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] Austron 1150
Sorry Alan for misspelling your name. Bert In a message dated 2/1/2011 4:06:58 P.M. Eastern Standard Time, alan.me...@btinternet.com writes: Hi Bert it is around I have a 1MHz version so I got the sheet from somewhere. I am just doing a sweep of my machine...it may be on an old disc..my filing system is "chaotic" to say the least!..if the worst comes to the worst and nobody else comes up with it I can always rescan the paper print I have with the osc. Alan G3NYK - Original Message - From: To: Sent: Tuesday, February 01, 2011 9:56 AM Subject: [time-nuts] Austron 1150 > Does any one have information on the Austron 1150 oscillator? I am > considering using it as an offset oscillator for a dual mixer so Allan Deviation, > aging and temperature stability would be of help. > Thank you BertKehren > ___ > 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] 5370B s/n prefixes
Why not just use the output from the 5370B - it already has the support circuitry and a buffered output. Back in my pre-time nut days my 5345 was both counter and lab reference standard the 10.mhz output went to a D/A so all my instruments were referenced to the 10811 in the 5345 Scott Sent from my Verizon Wireless BlackBerry -Original Message- From: Pete Lancashire Sender: time-nuts-boun...@febo.com Date: Tue, 1 Feb 2011 11:29:12 To: Discussion of precise time and frequency measurement Reply-To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 5370B s/n prefixes this being my first working 10811, I'd like to play with it. Since I'm setting up the benches to use the eventually distributed output from a T'bolt. I'm thinking of playing with it on its own and run the 5370B externally. Hopefully not to bad of an idea. So whats in the 5370B would just be for 'does it work or not' when not running externally. On Tue, Feb 1, 2011 at 10:32 AM, Bruce Griffiths wrote: > One option was an ECL gate oscillator with a crstal in a T05 sized can. > TTL output oscillators of that era had too much jitter to be useful even for > short time intervals. > > Bruce > > Robert Atkinson wrote: >> >> Hi, >> 10811 was standard. A basic (I think just a TTL "can") was an option. This >> was for users with external standards. >> Robert G8RPI. >> >> --- On Mon, 31/1/11, Pete Lancashire wrote: >> >> >> From: Pete Lancashire >> Subject: [time-nuts] 5370B s/n prefixes >> To: "Discussion of precise time and frequency >> measurement" >> Date: Monday, 31 January, 2011, 22:32 >> >> >> The online manual I found via ... ends at 2311 >> >> The unit I purchased is 2602 >> >> Is there a more recent online manual ? and if not where there any >> versions after 2602 ? >> >> The other thing I found was it does not have an opt 001 label/tag but >> it has a 10811 >> >> -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. >> >> >> >> >> ___ >> 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] 5370B s/n prefixes
I was thinking of putting it in its own box etc. But can easily envision running a coax back to the yet-to-be-built distribution amp. -pete On Tue, Feb 1, 2011 at 3:04 PM, wrote: > Why not just use the output from the 5370B - it already has the support > circuitry and a buffered output. > > Back in my pre-time nut days my 5345 was both counter and lab reference > standard the 10.mhz output went to a D/A so all my instruments were > referenced to the 10811 in the 5345 > > Scott > Sent from my Verizon Wireless BlackBerry > > -Original Message- > From: Pete Lancashire > Sender: time-nuts-boun...@febo.com > Date: Tue, 1 Feb 2011 11:29:12 > To: Discussion of precise time and frequency measurement > Reply-To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] 5370B s/n prefixes > > this being my first working 10811, I'd like to play with it. Since I'm > setting up > the benches to use the eventually distributed output from a T'bolt. I'm > thinking > of playing with it on its own and run the 5370B externally. Hopefully not to > bad of an idea. So whats in the 5370B would just be for 'does it work or not' > when not running externally. > > > > > On Tue, Feb 1, 2011 at 10:32 AM, Bruce Griffiths > wrote: >> One option was an ECL gate oscillator with a crstal in a T05 sized can. >> TTL output oscillators of that era had too much jitter to be useful even for >> short time intervals. >> >> Bruce >> >> Robert Atkinson wrote: >>> >>> Hi, >>> 10811 was standard. A basic (I think just a TTL "can") was an option. This >>> was for users with external standards. >>> Robert G8RPI. >>> >>> --- On Mon, 31/1/11, Pete Lancashire wrote: >>> >>> >>> From: Pete Lancashire >>> Subject: [time-nuts] 5370B s/n prefixes >>> To: "Discussion of precise time and frequency >>> measurement" >>> Date: Monday, 31 January, 2011, 22:32 >>> >>> >>> The online manual I found via ... ends at 2311 >>> >>> The unit I purchased is 2602 >>> >>> Is there a more recent online manual ? and if not where there any >>> versions after 2602 ? >>> >>> The other thing I found was it does not have an opt 001 label/tag but >>> it has a 10811 >>> >>> -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. >>> >>> >>> >>> >>> ___ >>> 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] From GPS World - Lightsquared has been given the go ahead
http://www.gpsworld.com/gnss-system/news/data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029?utm_source=GPS&utm_medium=email&utm_campaign=Navigate_01_31_2011&utm_content=data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029 ___ 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] From GPS World - Lightsquared has been given the go ahead
Reading the article, it sure smells like something is going on and it doesn't smell good. What's the going price for an FCC official, a Congressman, Senator, etc.? Joe Gray W5JG On Tue, Feb 1, 2011 at 4:09 PM, Pete Lancashire wrote: > http://www.gpsworld.com/gnss-system/news/data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029?utm_source=GPS&utm_medium=email&utm_campaign=Navigate_01_31_2011&utm_content=data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029 > > ___ > 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] From GPS World - Lightsquared has been given the goahead
Joe, The only thing they are worth is a 6 inch linear accelerator. 73BillWB6BNQ Joseph Gray wrote: Reading the article, it sure smells like something is going on and it doesn't smell good. What's the going price for an FCC official, a Congressman, Senator, etc.? Joe Gray W5JG On Tue, Feb 1, 2011 at 4:09 PM, Pete Lancashire wrote: > [1]http://www.gpsworld.com/gnss-system/news/data-shows-disastrous-gp s-jamming-fcc-approved-broadcaster-11029?utm_source=GPS&utm_medium=e mail&utm_campaign=Navigate_01_31_2011&utm_content=data-shows-disastr ous-gps-jamming-fcc-approved-broadcaster-11029> > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to [2]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 [3]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. http://www.gpsworld.com/gnss-system/news/data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029?utm_source=GPS&utm_medium=email&utm_campaign=Navigate_01_31_2011&utm_content=data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029 2. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 3. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ 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] From GPS World - Lightsquared has been given the go ahead
The FCC is a lackey of the present administration, which has a desire to show movement re broadband internet for all. The broadcast/telecom/communications industry is bypassing real competition by simply getting the government to do by fiat what competition would do at less cost and more utility. In addition, the gov't simply cannot stand an internet free, ungoverned and unregulated. See the recent activity in Egypt for what our government wants to be able to do. Don Joseph Gray > Reading the article, it sure smells like something is going on and it > doesn't smell good. What's the going price for an FCC official, a > Congressman, Senator, etc.? > > Joe Gray > W5JG > > > On Tue, Feb 1, 2011 at 4:09 PM, Pete Lancashire > wrote: >> http://www.gpsworld.com/gnss-system/news/data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029?utm_source=GPS&utm_medium=email&utm_campaign=Navigate_01_31_2011&utm_content=data-shows-disastrous-gps-jamming-fcc-approved-broadcaster-11029 >> >> ___ >> 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. > -- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." R. Bacon "If you don't know what it is, don't poke it." Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 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] Austron 1150
No Problem Bert its nothing to what my friends call be sometimes :-)) Glad you got the data. This is a great group for help! Alan - Original Message - From: To: Sent: Tuesday, February 01, 2011 9:34 PM Subject: Re: [time-nuts] Austron 1150 > Sorry Alan for misspelling your name. Bert > > > In a message dated 2/1/2011 4:06:58 P.M. Eastern Standard Time, > alan.me...@btinternet.com writes: > > Hi Bert it is around I have a 1MHz version so I got the sheet from > somewhere. I am just doing a sweep of my machine...it may be on an old > disc..my filing system is "chaotic" to say the least!..if the worst comes > to > the worst and nobody else comes up with it I can always rescan the paper > print I have with the osc. > > Alan G3NYK > > - Original Message - > From: > To: > Sent: Tuesday, February 01, 2011 9:56 AM > Subject: [time-nuts] Austron 1150 > > > > Does any one have information on the Austron 1150 oscillator? I am > > considering using it as an offset oscillator for a dual mixer so Allan > Deviation, > > aging and temperature stability would be of help. > > Thank you BertKehren > > ___ > > 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] From GPS World - Lightsquared has been given the go ahead
They did exactly the same thing in the past. It's not the current administration. FCC commissioners are appointed to FIVE YEAR TERMS. Remember the BPL proposals and the way the FCC granted that and that ARRL had to sue. The FCC has always voted this way. BPL was yet another internet broad band scheme that would have polluted the RF spectrum. FCC is predictable on this issue On Tue, Feb 1, 2011 at 4:22 PM, Don Latham wrote: > The FCC is a lackey of the present administration, -- = Chris Albertson Redondo Beach, California ___ 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] From GPS World - Lightsquared has been given the go ahead
Truly impressive level of cynicism... On Tue, Feb 1, 2011 at 7:38 PM, Chris Albertson wrote: > They did exactly the same thing in the past. It's not the current > administration. FCC commissioners are appointed to FIVE YEAR TERMS. > Remember the BPL proposals and the way the FCC granted that and that > ARRL had to sue. The FCC has always voted this way. BPL was yet > another internet broad band scheme that would have polluted the RF > spectrum. FCC is predictable on this issue > > > > > On Tue, Feb 1, 2011 at 4:22 PM, Don Latham wrote: > > The FCC is a lackey of the present administration, > > -- > = > Chris Albertson > Redondo Beach, California > > ___ > 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] From GPS World - Lightsquared has been given the go ahead
It is not cynicism if it is the truth. The previous head of the FCC was none other than the son of Gen. Colin Powell: Michael K. Powell. The same Powell who allowed Verizon (and other telco's) to stop sharing their lines and as a result made the price of DSL skyrocket. The Powell who pushed for BPL despite the ARRL's data showing massive interference. That's just one instance of FCC being in the pocket of big business. Not to mention last month's controversy about net neutrality (where FCC caved in). So, no cynicism. Just the truth. George Hrysanthopoulos Quoting "William H. Fite" : Truly impressive level of cynicism... On Tue, Feb 1, 2011 at 7:38 PM, Chris Albertson wrote: They did exactly the same thing in the past. It's not the current administration. FCC commissioners are appointed to FIVE YEAR TERMS. Remember the BPL proposals and the way the FCC granted that and that ARRL had to sue. The FCC has always voted this way. BPL was yet another internet broad band scheme that would have polluted the RF spectrum. FCC is predictable on this issue On Tue, Feb 1, 2011 at 4:22 PM, Don Latham wrote: > The FCC is a lackey of the present administration, -- = Chris Albertson Redondo Beach, California ___ 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] From GPS World - Lightsquared has been given the goahead
You left out IBOC, especially IBOC on AM at night. The FCC brass has zero technical knowledge. -Original Message- From: x...@darksmile.net Sender: time-nuts-boun...@febo.com Date: Tue, 01 Feb 2011 19:17:40 To: Discussion of precise time and frequency measurement; William H. Fite Reply-To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] From GPS World - Lightsquared has been given the go ahead It is not cynicism if it is the truth. The previous head of the FCC was none other than the son of Gen. Colin Powell: Michael K. Powell. The same Powell who allowed Verizon (and other telco's) to stop sharing their lines and as a result made the price of DSL skyrocket. The Powell who pushed for BPL despite the ARRL's data showing massive interference. That's just one instance of FCC being in the pocket of big business. Not to mention last month's controversy about net neutrality (where FCC caved in). So, no cynicism. Just the truth. George Hrysanthopoulos Quoting "William H. Fite" : > Truly impressive level of cynicism... > > > > > On Tue, Feb 1, 2011 at 7:38 PM, Chris Albertson > wrote: > >> They did exactly the same thing in the past. It's not the current >> administration. FCC commissioners are appointed to FIVE YEAR TERMS. >> Remember the BPL proposals and the way the FCC granted that and that >> ARRL had to sue. The FCC has always voted this way. BPL was yet >> another internet broad band scheme that would have polluted the RF >> spectrum. FCC is predictable on this issue >> >> >> >> >> On Tue, Feb 1, 2011 at 4:22 PM, Don Latham wrote: >> > The FCC is a lackey of the present administration, >> >> -- >> = >> Chris Albertson >> Redondo Beach, California >> >> ___ >> 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] R&S XSRM Rubidium
Ordered a small heat gun today. Has 2 temperatures and I am sure the low is going to be more then enough. I plan to mount the RB lamp upside down so the heat from the gun goes upward. The operating temperature normally is about 177 degrees F. So will add in a K thermocouple to monitor temp and then will gently raise the temp above the 177 region to see if two things can be done. 1) Migrate the RB blob to the center lowest point of the bulb to make it visually obvious and actually measurable with a micrometer. 2) Boil the blob off and back into the RB atmosphere. All the while documenting the temperature and time of the process. I think the biggest risk is actually popping the RB lamp from over preassure from higher temperatures. So Magnus as you say take it gently. Maybe 225-250 region. The heat gun should be here in 5-7 days. Regards Paul. On Sun, Jan 23, 2011 at 11:01 PM, paul swed wrote: > Hello to the group. > Well I did bring the RB oven online and indeed the color went from the blue > to the purple/pinkish color when the oven stabilized at 170-177 degress. > Thats what I see it moving around at. > John I agree it doesn't seem to matter what the frequency is. Though my > oscillators is still cranky to start. Really an issue. And the little RB > blob moves around. Interestingly when at temp and purple light I can see at > the center of the ampule window small blobs. Very small. But the area is > actually a bit dimmer because of them. > Looks like I need to hunt down a heat gun now. Have to buy one from some > place. > So this may go silent for a bit till I get one or find out whats up with > the oscillator starting. > Regards > Paul > > > On Sat, Jan 22, 2011 at 11:19 PM, John Miles wrote: > >> >> > >> > On 01/22/2011 11:31 PM, paul swed wrote: >> > > Well pretty interesting late afternoon. >> > > The oscillator works but C-11 definitely is troubled. Additionally a >> key >> > > element is an effective ground. Bridge the low side of the ampule to a >> > > better ground and the oscillator seems to reliably start. >> > Ignition occurs >> > > when the oscillator is in the 80-85 MC range. It can tune from >> > 65 to 130 MC. >> > >> > Interesting. I tuned for maximum amplitude. Seemed to work well enough. >> >> I've tried peaking a couple of different LPRO-101s for maximum lamp >> voltage, >> and in both cases I found that while it was possible to achieve more lamp >> voltage, the short-term stability ended up being a bit worse. I need to >> do >> some more experiments when I have more time, but my preliminary >> observation >> is that peaking the trimmer for maximum output is not necessarily the best >> strategy. Hard to say for sure with n=2, though. >> >> -- john, KE5FX >> >> >> ___ >> 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] External 10811 from HP 5070B
List, Wrote: So what’s in the 5370B would just be for 'does it work or not' when not running externally. There are at least three advantages for external operation. 1. The HP turkeys didn’t make EFC available on the HP 5370B which totally baffles me. 2. There are better lower noise and far more stable voltage references for powering the oscillator and EFC. 3. You can put the oscillator in an insulated box for better temperature stability. All of this will allow you to max out your oscillators cabilities. Regards, Perrier ___ 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.
