[time-nuts] 53230A input channel fault?
Hi all, I have a 53230A that behaves differently on ch1 and ch2. With ch2 at DC/1Mohm/postive-slope/1V it triggers ok on my PPS signal and shows e.g. a pusle-width measurement etc. The same signal connected to ch1 fails to trigger. I noticed the Vpp and Vmax/Vmin voltage readings are not correct for PPS signals - i.e. on a scope my signals are from 0V to 4V, but the counter shows -5 mV to +5 mV or similar. But perhaps that is because of the low duty-cycle of a PPS signal. We were measuring RF frequencies with the counter a few weeks back - it says max 1W input... it is possible that this was exceeded (does 50Ohm vs. 1MOhm setting matter for input-protection?). Any ideas on what breaks first on the input stage? :) (are there schematics online?) thanks, Anders ___ 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] ***SPAM*** 53230A input channel fault?
Le 19 nov. 2014 à 09:47, Anders Wallin anders.e.e.wal...@gmail.com a écrit : Hi all, I have a 53230A that behaves differently on ch1 and ch2. With ch2 at DC/1Mohm/postive-slope/1V it triggers ok on my PPS signal and shows e.g. a pusle-width measurement etc. The same signal connected to ch1 fails to trigger. Hi Anders, Are you sure you set the level to +1V…. That got me once. ;-) I noticed the Vpp and Vmax/Vmin voltage readings are not correct for PPS signals - i.e. on a scope my signals are from 0V to 4V, but the counter shows -5 mV to +5 mV or similar. But perhaps that is because of the low duty-cycle of a PPS signal. Mine shows the same and I assumed that this is the case, though I haven’t delved further. We were measuring RF frequencies with the counter a few weeks back - it says max 1W input... it is possible that this was exceeded (does 50Ohm vs. 1MOhm setting matter for input-protection?). Any ideas on what breaks first on the input stage? :) (are there schematics online?) thanks, Anders ___ 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] Yet another GPSDO
Hi It also could be a club / group and these could be club design projects. If they are done from some sort of kit, the level of parts and workmanship may vary a bit. You do *not* want to buy the first Heathkit I ever built …. Since the surplus GPSDO’s we buy for a hundred dollars or so mostly (but not always) come from China, I doubt that a group over there designed one that costs them the same sort of money. My guess is that, at least as a kit, the target cost was in the 25 cents on the dollar range ($50 or so). That’s not a bad thing at all, money matters. It may have limited what they could do compared to what’s in one of the surplus cell site GPSDO’s. Bob On Nov 19, 2014, at 1:24 AM, Don Latham d...@montana.com wrote: big 7 table Don Bob Camp Hi The guy’s email *might* be: bg7...@126.com That also could be something else entirely. Bob On Nov 18, 2014, at 7:34 PM, Bob Camp kb...@n1k.org wrote: Hi … and indeed it is one. There are a whole range of this and that pieces of test gear designed by the guy. Bob On Nov 18, 2014, at 7:28 PM, Alan Hochhalter alanh...@gmail.com wrote: BG7TBL sounds like an amateur radio callsign. Alan On Tue, Nov 18, 2014 at 5:24 PM, Bob Camp kb...@n1k.org wrote: Hi I’d say this has the look of a hobby / semi-pro project. I’ve seen several of them done in other areas. Somebody comes up with a pile of parts at the local market and does a board that at least sort of makes them work. Often they are based on some sort of open source effort. Without more information, this is very much a “who knows” sort of thing. Bob On Nov 18, 2014, at 7:19 PM, Arthur Dent golgarfrinc...@gmail.com wrote: You can see a similar product by this seller direct - http://www.cart100.com/seller/bg7tbl/ http://www.cart100.com/Product/38848104218/ Looks like a similar product at almost 3 time the Ebay price. There are more photos at the second link under 'specifications' and you can read MV89A on the Morion oscillator and see some wires patching an error on the bottom of the PC board. Note that the seller also has a frequency doubler at about $10. -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. ___ 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. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road Huson, MT, 59846 mail: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 53230A input channel fault?
A colleague of mine had seen this exact same behavior on another 53230A. The problem is a narrow trace right after the CH1 BNC input. http://www.anderswallin.net/2014/11/53230a-counter-input-channel-fix/ There might be some chemical corrosion going on, since the other counter that experienced this problem had definitely not been subjected to overvoltage or other abuse. Or perhaps it's a mechanical issue where the BNC-connector over time bends the PCB+trace. The BNCs don't appear mechanically anchored to the front-panel, they are just soldered to the PCB and stick out through holes in the front panel. We have one of the 100ps models and probably a third 20ps model also - time will tell if these will break in the same way... Agilent/Keysight - are you listening?!? fix it please :) Anders Hi all, I have a 53230A that behaves differently on ch1 and ch2. With ch2 at DC/1Mohm/postive-slope/1V it triggers ok on my PPS signal and shows e.g. a pusle-width measurement etc. The same signal connected to ch1 fails to trigger. ___ 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] Lucent Rubidium Schematics
Perrier I also requested them offline. Did not receive them. Regards Paul WB8TSL On Wed, Nov 19, 2014 at 2:17 AM, Jan Boutsen jan.bout...@telenet.be wrote: Dear Perry: I would be pleased to receive the PDF and schematics, Many thanks for your efforts in this matter. Boutsen Jan PhD ON4MMW Leopoldplein 28 3500 Hasselt Belgium jan.bout...@telenet.be OR ( jan.bout...@pandora.be ) - Original Message - From: Perry Sandeen via time-nuts time-nuts@febo.com To: time-nuts time-nuts@febo.com Sent: Wednesday, November 05, 2014 1:35 AM Subject: [time-nuts] Lucent Rubidium Schematics List, I have just finished digitizing and repaginating *Modifying Lucent RFG-M-RB Rubidium Frequency Standard* by Ivan Makarov. (m...@makarov.ca Copyright © 2011 VE3IVM). He has made many modifications to solve a number of problems that have been mentioned on the list lately. If anyone wants a PDF copy PLEASE generate an original email off list to me only asking for a copy. This is because if you do a *reply to* from list it Yahoo will lump them all together and I might miss a request. I will also include two additional circuits. One is a divide by 1.5 and the other is a divide by 3. 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. ___ 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] Fluke 7260a manual
Does anyone have a Fluke 7260a manual? I am able to use mine pretty well but would like to better understand the interval measuring functions. -- Brian Lloyd Lloyd Aviation 706 Flightline Drive Spring Branch, TX 78070 br...@lloyd.aero +1.210.802-8FLY (1.210.802-8359) ___ 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] Fluke 7260a manual
Hi Brian, Tucker has it, but for $75,- http://www.etestmanuals.com/Search.aspx?Mfg=FLUPage=4 K. 2014-11-19 15:56 GMT+01:00 Brian Lloyd br...@lloyd.aero: Does anyone have a Fluke 7260a manual? I am able to use mine pretty well but would like to better understand the interval measuring functions. -- Brian Lloyd Lloyd Aviation 706 Flightline Drive Spring Branch, TX 78070 br...@lloyd.aero +1.210.802-8FLY (1.210.802-8359) ___ 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] 5 to 10 MHz Quadrature Driven Mixer Doubler
I have received permission to distribute copies of my QEX article on this subject from ARRL. In addition to the article I will include full size schematics and color photos of the various assemblies. The design includes an adjustable 10 MHz output amplifier for driving 50 OHM loads. If interested please email me off list at johncr...@aol.com I will wait a few days and then mail a complete package to all requestors. Best regards to all - 73 john k6iql ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] QEX article please
Thanks Paul WB8TSL ___ 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] 53230A input channel fault?
I recently got a used 53131A. It had the same problem, even though the BNC connectors are fixed to the front panel. On Wed, Nov 19, 2014 at 2:18 PM, Anders Wallin anders.e.e.wal...@gmail.com wrote: A colleague of mine had seen this exact same behavior on another 53230A. The problem is a narrow trace right after the CH1 BNC input. http://www.anderswallin.net/2014/11/53230a-counter-input-channel-fix/ There might be some chemical corrosion going on, since the other counter that experienced this problem had definitely not been subjected to overvoltage or other abuse. Or perhaps it's a mechanical issue where the BNC-connector over time bends the PCB+trace. The BNCs don't appear mechanically anchored to the front-panel, they are just soldered to the PCB and stick out through holes in the front panel. We have one of the 100ps models and probably a third 20ps model also - time will tell if these will break in the same way... Agilent/Keysight - are you listening?!? fix it please :) Anders Hi all, I have a 53230A that behaves differently on ch1 and ch2. With ch2 at DC/1Mohm/postive-slope/1V it triggers ok on my PPS signal and shows e.g. a pusle-width measurement etc. The same signal connected to ch1 fails to trigger. ___ 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] ADF4001/4002 startup questions
Morning nuts- I'm aware several of you use the ADF4002 for a simple small PLL in your radios. Could any of you share some example bits or maybe even the code you use during startup? I know what my latch values should be, but I don't seem to be getting them wrapped in the right control bits. I am a hardware guy, this software stuff is coming to me slowly. Thanks for any help, feel free to reply directly. NS ___ 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] Fluke 7260a manual
On Wednesday, November 19, 2014, Szeker K. szeke...@gmail.com wrote: Hi Brian, Tucker has it, but for $75,- http://www.etestmanuals.com/Search.aspx?Mfg=FLUPage=4 K. Thank you. I have been able to find the manual but, as you indicated, only at a price exceeding what I paid for the unit. Still hoping to find a scanned copy. -- Brian Lloyd Lloyd Aviation 706 Flightline Drive Spring Branch, TX 78070 br...@lloyd.aero +1.210.802-8FLY (1.210.802-8359) ___ 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] ks... answers The emails are getting long
Hi Doug - Wow. Wonder how many on here remember or know about National's Damn Fast line, HI. I used them all the time, and, still have a few. 73 - Mike Mike B. Feher, EOZ Inc. 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 office 908-902-3831 cell -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Doug Ronald Sent: Tuesday, November 18, 2014 6:21 PM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] ks... answers The emails are getting long Importance: Low I doubled my Austron 1250A from 5 MHz to 10 MHz with 2 NPNs fed in push-pull and output in parallel with a tuned circuit. Before buffering it with an LH0063, I fed the signal through a 10 MHz crystal, purchased at a local surplus electronics store for $0.95. The 2nd harmonic is about 70 dB down. -Doug, AE6SY -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Tuesday, November 18, 2014 3:11 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] ks... answers The emails are getting long HI Actually there are three different approaches to the “double 5 MHz” question. Roughly 99.99% of all doubler / tripler OCXO’s out there do the trick with a simple single transistor stage and a tuned tank. Follow it up with a tuned single transistor output amp. Cheap, easy, not very fancy, gets people mad when mentioned. It works plenty good enough. The basic design approach dates back to tube based multipliers done in the 1920’s. Just about any transmitter design textbook from 1930 through 1960 has design charts and tube based examples. Bob On Nov 18, 2014, at 4:26 PM, paul swed paulsw...@gmail.com wrote: Don The two units work together by a buggy cable from what I have heard so far. The Ref0 is the master that drives stuff it connects to REF1 that disciplines REF0. If GPS goes away or the ref1 it all keeps ticking. This is been teh system design for about 20 years. Many of us have the ref1 only and the internal osc is 5 Mhz so thats why you have seen discussions on multipliers here. Tap the 5 Mhz double it filter it and buffer it. there seem to be 2 schools of thoughts on the process. Balanced mixer or Wenzel. I would have hacked the answer already. But I need to keep my ref1 running so that it ages in. ASI will refund your money if bad. But only in 30 days. I do like what I see from the KS-... Can never remember the number. Regards Paul WB8TSL ___ 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] KS-24361 10 Mhz mod interesting document
Was doing a search for Lucent RFTGm-II-XO looking for alternates to the $150 solution. A 10 Mhz mod popped up. http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf Looks simple enough and I have not validated anything. Regards Paul WB8TSL ___ 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] ADF4001/4002 startup questions
Hi The 4001 is pretty forgiving of order of load issues. I’ve always just followed the order in the AD app notes and it’s worked fine. I’d recommend getting any of the USB logic level scopes and tacking it onto what you have. The ones I have seen are plenty fast enough for this kind of thing. The software that comes with them lets them run as a logic analyzer with deep enough memory to see the whole load process. If you are half as prone to error as I am, it will pay for it’s self pretty fast. Bob On Nov 19, 2014, at 12:35 PM, Neil Schroeder gign...@gmail.com wrote: Morning nuts- I'm aware several of you use the ADF4002 for a simple small PLL in your radios. Could any of you share some example bits or maybe even the code you use during startup? I know what my latch values should be, but I don't seem to be getting them wrapped in the right control bits. I am a hardware guy, this software stuff is coming to me slowly. Thanks for any help, feel free to reply directly. NS ___ 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] KS-24361 10 Mhz mod interesting document
Hi Another alternative would be to AC couple into a NC7SZ125 (using a 0.1 uf cap and a pair of 100K resistors )and take the output off with a Tee filter (using two 1.5 uH coils and a 270 pf cap). Bob On Nov 19, 2014, at 5:47 PM, paul swed paulsw...@gmail.com wrote: Was doing a search for Lucent RFTGm-II-XO looking for alternates to the $150 solution. A 10 Mhz mod popped up. http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf Looks simple enough and I have not validated anything. Regards Paul WB8TSL ___ 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] ADF4001/4002 startup questions
I got myself a bus pirate - thanks for bringing that forward in my brain. I got a lot of great responses thank you everyone. On Wednesday, November 19, 2014, Bob Camp kb...@n1k.org wrote: Hi The 4001 is pretty forgiving of order of load issues. I’ve always just followed the order in the AD app notes and it’s worked fine. I’d recommend getting any of the USB logic level scopes and tacking it onto what you have. The ones I have seen are plenty fast enough for this kind of thing. The software that comes with them lets them run as a logic analyzer with deep enough memory to see the whole load process. If you are half as prone to error as I am, it will pay for it’s self pretty fast. Bob On Nov 19, 2014, at 12:35 PM, Neil Schroeder gign...@gmail.com javascript:; wrote: Morning nuts- I'm aware several of you use the ADF4002 for a simple small PLL in your radios. Could any of you share some example bits or maybe even the code you use during startup? I know what my latch values should be, but I don't seem to be getting them wrapped in the right control bits. I am a hardware guy, this software stuff is coming to me slowly. Thanks for any help, feel free to reply directly. NS ___ time-nuts mailing list -- time-nuts@febo.com javascript:; 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 javascript:; 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] ks... answers The emails are getting long
Hi Since they were designed to be used inside the feedback loop of an op-amp, they may not be the best thing to use “stand alone”. Of course if they are free, it’s hard to beat the price. Bob On Nov 19, 2014, at 4:42 PM, Mike Feher mfe...@eozinc.com wrote: Hi Doug - Wow. Wonder how many on here remember or know about National's Damn Fast line, HI. I used them all the time, and, still have a few. 73 - Mike Mike B. Feher, EOZ Inc. 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 office 908-902-3831 cell -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Doug Ronald Sent: Tuesday, November 18, 2014 6:21 PM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] ks... answers The emails are getting long Importance: Low I doubled my Austron 1250A from 5 MHz to 10 MHz with 2 NPNs fed in push-pull and output in parallel with a tuned circuit. Before buffering it with an LH0063, I fed the signal through a 10 MHz crystal, purchased at a local surplus electronics store for $0.95. The 2nd harmonic is about 70 dB down. -Doug, AE6SY -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Tuesday, November 18, 2014 3:11 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] ks... answers The emails are getting long HI Actually there are three different approaches to the “double 5 MHz” question. Roughly 99.99% of all doubler / tripler OCXO’s out there do the trick with a simple single transistor stage and a tuned tank. Follow it up with a tuned single transistor output amp. Cheap, easy, not very fancy, gets people mad when mentioned. It works plenty good enough. The basic design approach dates back to tube based multipliers done in the 1920’s. Just about any transmitter design textbook from 1930 through 1960 has design charts and tube based examples. Bob On Nov 18, 2014, at 4:26 PM, paul swed paulsw...@gmail.com wrote: Don The two units work together by a buggy cable from what I have heard so far. The Ref0 is the master that drives stuff it connects to REF1 that disciplines REF0. If GPS goes away or the ref1 it all keeps ticking. This is been teh system design for about 20 years. Many of us have the ref1 only and the internal osc is 5 Mhz so thats why you have seen discussions on multipliers here. Tap the 5 Mhz double it filter it and buffer it. there seem to be 2 schools of thoughts on the process. Balanced mixer or Wenzel. I would have hacked the answer already. But I need to keep my ref1 running so that it ages in. ASI will refund your money if bad. But only in 30 days. I do like what I see from the KS-... Can never remember the number. Regards Paul WB8TSL ___ 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] KS-24361 10 Mhz mod interesting document
On 11/19/2014 2:47 PM, paul swed wrote: Was doing a search for Lucent RFTGm-II-XO looking for alternates to the $150 solution. A 10 Mhz mod popped up. http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf Looks simple enough and I have not validated anything. Regards Paul WB8TSL Paul, that has nothing to do with the current ebay offerings that have generated so much traffic recently... Dan ___ 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] KS-24361 10 Mhz mod interesting document
Hi This is a branch thread that never got it’s title changed to drop the KS-24361 part of it. More or less it’s “compare the older KS boxes to the newer ones”. Bob On Nov 19, 2014, at 6:03 PM, Dan Rae dan...@verizon.net wrote: On 11/19/2014 2:47 PM, paul swed wrote: Was doing a search for Lucent RFTGm-II-XO looking for alternates to the $150 solution. A 10 Mhz mod popped up. http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf Looks simple enough and I have not validated anything. Regards Paul WB8TSL Paul, that has nothing to do with the current ebay offerings that have generated so much traffic recently... Dan ___ 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] RFTG-u REF 0 Z3812 as cleanup module for FEI5680A
HI For anything short of microwave multiplication, the 15 MHz output of the Z3810/11/12 is likely to be “good enough”. The 60 KHz noise hump that may be from the power brick isn’t going to make it through a PLL going to VHF, so the only benefit of pulling the brick would be some sort of SDR running directly off of 15 MHz. A crystal bandpass filter at 15 MHz could be made (or found) in that case. The brick probably does a better job rejecting the 50/60 Hz stuff you would get into with a direct supply setup. So let’s see … Nyquist at 7.5 MHz. 1/2 band at 3.75 MHz. You could have a real good radio from maybe 4 MHz on down to DC. That might be interesting, but it’s probably not going to get a lot more people buying these up to do it. Bob On Nov 18, 2014, at 9:22 AM, Bert Kehren via time-nuts time-nuts@febo.com wrote: I would not mess with the power management of the unit, HP did know what they where doing. Any clean up I would move off the unit if you want to stay with the same OCXO you have one in the second unit. As to phase noise before time nuts issues took up all my time low noise signal generators where my main focus and will be again. I know of no high quality Sig. Gen that does not include a 100 MHz XO and in some cases higher frequency SAW units. And that has been going on for as long as I can remember and I am 72. One subject no one has touched on is thermal control. I do not know but suspect forced air cooling that would explain why all connectors on the front. From comments by some members we are looking at 20 W. I will include a fan along with temperature control. Bert Kehren In a message dated 11/18/2014 12:21:32 A.M. Eastern Standard Time, don_he...@gmx.de writes: Hello List, having not looked at the spectra yet as I am confined to mobile phone instead of PC often, I had the idea to marry those two well-known devices to get a nice clean reference oscillator. I remember the spectrum of the FEI as not so nice, and the MTI sounds better. My understanding is yet that I would need to emulate the REF1 unit, basically need to look up the lonely REF tweak with the bridges in J5, maybe fake valid GPS datagrams with a microcontroller and turn the 1PPS pulse from the FEI into that 2 PPSes expected. Replacing the Lucent Power Brick with a linear supply and bridging the tripler to get 5 MHz out might be tweaks to increase the output spectrum further. This was discussed before, I think, i have to look it up too. (I wonder if the REF0 acts up after complete removal of the source REF1 or keep on doing holdover which would be a nice way to take a good frequency standard to a ham radio repeater side) BR Hendrik ___ 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] ks... answers The emails are getting long
I remember the Fast and Damn Fast Buffer Amp data sheet. LH0036? I may not be remembering the correct part number. I used to have a copy of that data sheet, as well as another that was labeled DC to Daylight on the data sheet. DaveD On 11/19/2014 2:42 PM, Mike Feher wrote: Hi Doug - Wow. Wonder how many on here remember or know about National's Damn Fast line, HI. I used them all the time, and, still have a few. 73 - Mike Mike B. Feher, EOZ Inc. 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 office 908-902-3831 cell -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Doug Ronald Sent: Tuesday, November 18, 2014 6:21 PM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] ks... answers The emails are getting long Importance: Low I doubled my Austron 1250A from 5 MHz to 10 MHz with 2 NPNs fed in push-pull and output in parallel with a tuned circuit. Before buffering it with an LH0063, I fed the signal through a 10 MHz crystal, purchased at a local surplus electronics store for $0.95. The 2nd harmonic is about 70 dB down. -Doug, AE6SY -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Tuesday, November 18, 2014 3:11 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] ks... answers The emails are getting long HI Actually there are three different approaches to the “double 5 MHz” question. Roughly 99.99% of all doubler / tripler OCXO’s out there do the trick with a simple single transistor stage and a tuned tank. Follow it up with a tuned single transistor output amp. Cheap, easy, not very fancy, gets people mad when mentioned. It works plenty good enough. The basic design approach dates back to tube based multipliers done in the 1920’s. Just about any transmitter design textbook from 1930 through 1960 has design charts and tube based examples. Bob On Nov 18, 2014, at 4:26 PM, paul swed paulsw...@gmail.com wrote: Don The two units work together by a buggy cable from what I have heard so far. The Ref0 is the master that drives stuff it connects to REF1 that disciplines REF0. If GPS goes away or the ref1 it all keeps ticking. This is been teh system design for about 20 years. Many of us have the ref1 only and the internal osc is 5 Mhz so thats why you have seen discussions on multipliers here. Tap the 5 Mhz double it filter it and buffer it. there seem to be 2 schools of thoughts on the process. Balanced mixer or Wenzel. I would have hacked the answer already. But I need to keep my ref1 running so that it ages in. ASI will refund your money if bad. But only in 30 days. I do like what I see from the KS-... Can never remember the number. Regards Paul WB8TSL ___ 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] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
Hi Looking at the 58503 auctions on eBay, I think that a number of them are simply Z3801’s out of cell tower scrap operations that have had the 58503 front panel bits and pieces added to them. Some of the cases have a fairly odd look to them. Bob On Nov 17, 2014, at 7:48 PM, Charles Steinmetz csteinm...@yandex.com wrote: Bob wrote: The 58503 is a Z3801 with a pretty instrument style package put around it - right? If so, it might / should have a 10811 in it rather than an MTI OCXO. I think there may be other minor differences between the 58503 and the Z3801, including a newer GPS engine, but I'm not positive what they all are. They are clearly very similar. The 58503 should have either a dual-oven 10811 or the Symmetricom look-alike. (The Symmetricom has a 5MHz crystal and a doubler -- it looks exactly like a DO 10811 except for lacking an HP sticker.) I bought a 58503 from one of the usual far-eastern suspects, which was advertised expressly as having a 10811. When it arrived, I saw that it had the Symmetricom OCXO. I fired off a message to the supplier complaining that I did not receive the promised 10811, and he offered to part-refund the purchase price or exchange the oscillator. Because of the high transaction cost of exchanging, I elected to take the part refund thinking I would swap in one of the DO 10811s I had on hand. But after only a week of running, the Symmetricom was better than all of the 10811s I own! (Interestingly, my best 10811 is not a DO unit -- it is a SO 10811 that came out of an HP5345A that was originally part of a 5390A frequency stability analyzer.) Note: My experience should NOT be read as a claim that the Symmetricom oscillators are better than 10811s. My sample of the Symmetricoms is way too limited to make any claims. But this particular Symmetricom happens to be a very fine OCXO. Best regards, Charles ___ 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] KS-24361 10 Mhz mod interesting document
I just saw the picture of the units front panel and it looked the same. Oh well. Regards Paul WB8TSL On Wed, Nov 19, 2014 at 7:08 PM, Bob Camp kb...@n1k.org wrote: Hi This is a branch thread that never got it’s title changed to drop the KS-24361 part of it. More or less it’s “compare the older KS boxes to the newer ones”. Bob On Nov 19, 2014, at 6:03 PM, Dan Rae dan...@verizon.net wrote: On 11/19/2014 2:47 PM, paul swed wrote: Was doing a search for Lucent RFTGm-II-XO looking for alternates to the $150 solution. A 10 Mhz mod popped up. http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf Looks simple enough and I have not validated anything. Regards Paul WB8TSL Paul, that has nothing to do with the current ebay offerings that have generated so much traffic recently... Dan ___ 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] ks... answers The emails are getting long
I think those devices were in the same databook that had a page in the back of the book, containing only the text This page is as blank as a salesman's memory The person who did the final editing on that issue had a rare sense of humor. Dave M Dave Daniel wrote: I remember the Fast and Damn Fast Buffer Amp data sheet. LH0036? I may not be remembering the correct part number. I used to have a copy of that data sheet, as well as another that was labeled DC to Daylight on the data sheet. DaveD On 11/19/2014 2:42 PM, Mike Feher wrote: Hi Doug - Wow. Wonder how many on here remember or know about National's Damn Fast line, HI. I used them all the time, and, still have a few. 73 - Mike Mike B. Feher, EOZ Inc. 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 office 908-902-3831 cell ___ 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] KS-24361 10 Mhz mod interesting document
Hi Lucent has been putting GPS based Radio Frequency Timing Generators (RFTG) into cell sites for a long time. They all have the 15 MHz and pps outputs in common. Lucent also seems to like one paint color and an approximate size. For what ever reason (because they can?) the model numbers and internal designs change from time to time. For quite a while they really liked the idea of running Rb’s in cell sites. Looking at the latest batch of parts, that seems to have changed around 1999. Lots of generations of very similar looking boxes with very different stuff inside each of them. Bob On Nov 19, 2014, at 7:53 PM, paul swed paulsw...@gmail.com wrote: I just saw the picture of the units front panel and it looked the same. Oh well. Regards Paul WB8TSL On Wed, Nov 19, 2014 at 7:08 PM, Bob Camp kb...@n1k.org wrote: Hi This is a branch thread that never got it’s title changed to drop the KS-24361 part of it. More or less it’s “compare the older KS boxes to the newer ones”. Bob On Nov 19, 2014, at 6:03 PM, Dan Rae dan...@verizon.net wrote: On 11/19/2014 2:47 PM, paul swed wrote: Was doing a search for Lucent RFTGm-II-XO looking for alternates to the $150 solution. A 10 Mhz mod popped up. http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf Looks simple enough and I have not validated anything. Regards Paul WB8TSL Paul, that has nothing to do with the current ebay offerings that have generated so much traffic recently... Dan ___ 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] Yet another GPSDO
Hi After some more digging, the date convention used by the club or what ever it is: year - month - day. I sort of doubted that was the case, but indeed it is. The GPSDO has a design date of November 6th 2014. They are pretty much just out of beta test (if that) at this point. Bob On Nov 19, 2014, at 1:24 AM, Don Latham d...@montana.com wrote: big 7 table Don Bob Camp Hi The guy’s email *might* be: bg7...@126.com That also could be something else entirely. Bob On Nov 18, 2014, at 7:34 PM, Bob Camp kb...@n1k.org wrote: Hi … and indeed it is one. There are a whole range of this and that pieces of test gear designed by the guy. Bob On Nov 18, 2014, at 7:28 PM, Alan Hochhalter alanh...@gmail.com wrote: BG7TBL sounds like an amateur radio callsign. Alan On Tue, Nov 18, 2014 at 5:24 PM, Bob Camp kb...@n1k.org wrote: Hi I’d say this has the look of a hobby / semi-pro project. I’ve seen several of them done in other areas. Somebody comes up with a pile of parts at the local market and does a board that at least sort of makes them work. Often they are based on some sort of open source effort. Without more information, this is very much a “who knows” sort of thing. Bob On Nov 18, 2014, at 7:19 PM, Arthur Dent golgarfrinc...@gmail.com wrote: You can see a similar product by this seller direct - http://www.cart100.com/seller/bg7tbl/ http://www.cart100.com/Product/38848104218/ Looks like a similar product at almost 3 time the Ebay price. There are more photos at the second link under 'specifications' and you can read MV89A on the Morion oscillator and see some wires patching an error on the bottom of the PC board. Note that the seller also has a frequency doubler at about $10. -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. ___ 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. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road Huson, MT, 59846 mail: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Yet another GPSDO
Hi After some more digging, I was more than a bit high on my kit cost estimate. The MV89’s are $5-$6 on the market in China. The PCBs as a set are under $3. Best guess is that the kit (if that’s what it is) sells for under $25 un-assembled. Bob On Nov 19, 2014, at 7:37 AM, Bob Camp kb...@n1k.org wrote: Hi It also could be a club / group and these could be club design projects. If they are done from some sort of kit, the level of parts and workmanship may vary a bit. You do *not* want to buy the first Heathkit I ever built …. Since the surplus GPSDO’s we buy for a hundred dollars or so mostly (but not always) come from China, I doubt that a group over there designed one that costs them the same sort of money. My guess is that, at least as a kit, the target cost was in the 25 cents on the dollar range ($50 or so). That’s not a bad thing at all, money matters. It may have limited what they could do compared to what’s in one of the surplus cell site GPSDO’s. Bob On Nov 19, 2014, at 1:24 AM, Don Latham d...@montana.com wrote: big 7 table Don Bob Camp Hi The guy’s email *might* be: bg7...@126.com That also could be something else entirely. Bob On Nov 18, 2014, at 7:34 PM, Bob Camp kb...@n1k.org wrote: Hi … and indeed it is one. There are a whole range of this and that pieces of test gear designed by the guy. Bob On Nov 18, 2014, at 7:28 PM, Alan Hochhalter alanh...@gmail.com wrote: BG7TBL sounds like an amateur radio callsign. Alan On Tue, Nov 18, 2014 at 5:24 PM, Bob Camp kb...@n1k.org wrote: Hi I’d say this has the look of a hobby / semi-pro project. I’ve seen several of them done in other areas. Somebody comes up with a pile of parts at the local market and does a board that at least sort of makes them work. Often they are based on some sort of open source effort. Without more information, this is very much a “who knows” sort of thing. Bob On Nov 18, 2014, at 7:19 PM, Arthur Dent golgarfrinc...@gmail.com wrote: You can see a similar product by this seller direct - http://www.cart100.com/seller/bg7tbl/ http://www.cart100.com/Product/38848104218/ Looks like a similar product at almost 3 time the Ebay price. There are more photos at the second link under 'specifications' and you can read MV89A on the Morion oscillator and see some wires patching an error on the bottom of the PC board. Note that the seller also has a frequency doubler at about $10. -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. ___ 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. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road Huson, MT, 59846 mail: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] ks... answers The emails are getting long
On 11/19/14, 3:59 PM, Dave Daniel wrote: I remember the Fast and Damn Fast Buffer Amp data sheet. LH0036? I may not be remembering the correct part number. I used to have a copy of that data sheet, as well as another that was labeled DC to Daylight on the data sheet. DaveD On 11/19/2014 2:42 PM, Mike Feher wrote: Hi Doug - Wow. Wonder how many on here remember or know about National's Damn Fast line, HI. I used them all the time, and, still have a few. 73 - Mike In the 1984 databook (Blue cover with the yellowing fragile newsprint pages) and in the 1975 databook (yellow and green cover, nice quality paper). LH0033 and LH0063 are the Fast and Damn Fast buffer amplifiers. In this context the data sheet says 6000V/microsecond. With +/- 10V into a 50 ohm load (although you only get 2400 V/us there) Last two pages in the 84 book are just blank. Last page in the 75 book is a description of MIL-STD-883B Interesting parts.. They aren't kidding when they say you need good power supply bypassing and decoupling.(a comment that is in the 84 book but not the 75 version) I'm trying to remember what I was using them for: driving a YIG tuning coil in a phase locked loop, I think, but it might have been driving a fast RF switch. Interesting parts back then.. Does anyone still make or use a LM746 chroma demodulator (other than as a replacement part) or any of the other very purpose specific parts for parts of a TV? (like LM1845 signal processing, etc.) ___ 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] KS-24361 10 Mhz mod interesting document
And I am the happy owner of 4 or 5 of the $25 RBs. Hey they are old but you can recover them with the old heatgun trick. That said glowing things like those do tend to wear out. I could see why they moved away from them. On Wed, Nov 19, 2014 at 8:15 PM, Bob Camp kb...@n1k.org wrote: Hi Lucent has been putting GPS based Radio Frequency Timing Generators (RFTG) into cell sites for a long time. They all have the 15 MHz and pps outputs in common. Lucent also seems to like one paint color and an approximate size. For what ever reason (because they can?) the model numbers and internal designs change from time to time. For quite a while they really liked the idea of running Rb’s in cell sites. Looking at the latest batch of parts, that seems to have changed around 1999. Lots of generations of very similar looking boxes with very different stuff inside each of them. Bob On Nov 19, 2014, at 7:53 PM, paul swed paulsw...@gmail.com wrote: I just saw the picture of the units front panel and it looked the same. Oh well. Regards Paul WB8TSL On Wed, Nov 19, 2014 at 7:08 PM, Bob Camp kb...@n1k.org wrote: Hi This is a branch thread that never got it’s title changed to drop the KS-24361 part of it. More or less it’s “compare the older KS boxes to the newer ones”. Bob On Nov 19, 2014, at 6:03 PM, Dan Rae dan...@verizon.net wrote: On 11/19/2014 2:47 PM, paul swed wrote: Was doing a search for Lucent RFTGm-II-XO looking for alternates to the $150 solution. A 10 Mhz mod popped up. http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf Looks simple enough and I have not validated anything. Regards Paul WB8TSL Paul, that has nothing to do with the current ebay offerings that have generated so much traffic recently... Dan ___ 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] ks... answers The emails are getting long
I know I have some numbers of chroma demod chips as I recall. Picked up in a flea market special along with other more useful chips. I absolutely have the LH033 buffers. Fet input and like lots of power. Have used them as frequency buffers. Super easy to use. Real chips Regards Paul WB8TSL On Wed, Nov 19, 2014 at 9:00 PM, Jim Lux jim...@earthlink.net wrote: On 11/19/14, 3:59 PM, Dave Daniel wrote: I remember the Fast and Damn Fast Buffer Amp data sheet. LH0036? I may not be remembering the correct part number. I used to have a copy of that data sheet, as well as another that was labeled DC to Daylight on the data sheet. DaveD On 11/19/2014 2:42 PM, Mike Feher wrote: Hi Doug - Wow. Wonder how many on here remember or know about National's Damn Fast line, HI. I used them all the time, and, still have a few. 73 - Mike In the 1984 databook (Blue cover with the yellowing fragile newsprint pages) and in the 1975 databook (yellow and green cover, nice quality paper). LH0033 and LH0063 are the Fast and Damn Fast buffer amplifiers. In this context the data sheet says 6000V/microsecond. With +/- 10V into a 50 ohm load (although you only get 2400 V/us there) Last two pages in the 84 book are just blank. Last page in the 75 book is a description of MIL-STD-883B Interesting parts.. They aren't kidding when they say you need good power supply bypassing and decoupling.(a comment that is in the 84 book but not the 75 version) I'm trying to remember what I was using them for: driving a YIG tuning coil in a phase locked loop, I think, but it might have been driving a fast RF switch. Interesting parts back then.. Does anyone still make or use a LM746 chroma demodulator (other than as a replacement part) or any of the other very purpose specific parts for parts of a TV? (like LM1845 signal processing, etc.) ___ 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] ks... answers The emails are getting long
My fonts are going amuck On Wed, Nov 19, 2014 at 9:09 PM, paul swed paulsw...@gmail.com wrote: I know I have some numbers of chroma demod chips as I recall. Picked up in a flea market special along with other more useful chips. I absolutely have the LH033 buffers. Fet input and like lots of power. Have used them as frequency buffers. Super easy to use. Real chips Regards Paul WB8TSL On Wed, Nov 19, 2014 at 9:00 PM, Jim Lux jim...@earthlink.net wrote: On 11/19/14, 3:59 PM, Dave Daniel wrote: I remember the Fast and Damn Fast Buffer Amp data sheet. LH0036? I may not be remembering the correct part number. I used to have a copy of that data sheet, as well as another that was labeled DC to Daylight on the data sheet. DaveD On 11/19/2014 2:42 PM, Mike Feher wrote: Hi Doug - Wow. Wonder how many on here remember or know about National's Damn Fast line, HI. I used them all the time, and, still have a few. 73 - Mike In the 1984 databook (Blue cover with the yellowing fragile newsprint pages) and in the 1975 databook (yellow and green cover, nice quality paper). LH0033 and LH0063 are the Fast and Damn Fast buffer amplifiers. In this context the data sheet says 6000V/microsecond. With +/- 10V into a 50 ohm load (although you only get 2400 V/us there) Last two pages in the 84 book are just blank. Last page in the 75 book is a description of MIL-STD-883B Interesting parts.. They aren't kidding when they say you need good power supply bypassing and decoupling.(a comment that is in the 84 book but not the 75 version) I'm trying to remember what I was using them for: driving a YIG tuning coil in a phase locked loop, I think, but it might have been driving a fast RF switch. Interesting parts back then.. Does anyone still make or use a LM746 chroma demodulator (other than as a replacement part) or any of the other very purpose specific parts for parts of a TV? (like LM1845 signal processing, etc.) ___ 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] 5 to 10 MHz Quad Driven Mixer doubler article
Apparently there is some interest in this technique. So far I have 35 requests and still counting. Please if you do want a copy send me an email OFF LIST to johncr...@aol.com. Requests posted on list are too hard to find and too hard to make into a master address list. In addition to the basic article I will add some related material. And as they say on TV thats not all. One QEX reader asked how it compares with the classic push-push doubler. I prepared a brief paper on the push-push doubler and will include it as well. They are both useful depending upon the host application. For one thing the push-push circuit can give healthy power gain and power output up to a Watt or more. I plan to fire off the package on Sunday. Best regards to all - john c roos k6iql ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] 5 to 10 MHz Quad Driven Mixer doubler article
Hi John, I would be interested in your article. May I suggest that if you do not have a means of putting it ALL into one PDF, let me know as I have scanning ability as well as publishing into the PDF format. That way it could be put on to a server that KO4BB maintains foir all the Timenuts list of manuals and other papers etc.. 73BillWB6BNQ ___ 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] MIT 2 inch cesium fountain, optically pumped
See: http://newsoffice.mit.edu/2014/portable-atomic-clocks-1112 Any comments? Rick Karlquist N6RK ___ 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] MIT 2 inch cesium fountain, optically pumped
Hi Rick, They did not mention the complexity of the laser system they needed, especially considering that the optical bench of a fountain isn't all that small, and also because they want to de-tune lasers. While they seems to have an idea, they didn't touch on that subject. Nice to see that people think in a different way thought. Looking forward to see the progress on this one. Cheers, Magnus On 11/20/2014 05:24 AM, Richard (Rick) Karlquist wrote: See: http://newsoffice.mit.edu/2014/portable-atomic-clocks-1112 Any comments? Rick Karlquist N6RK ___ 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.
