Re: [time-nuts] Power supply for 'Bay FE-5680A?
Hi all, The power supply that I ordered from ebay is a 15Volt 2Amp switcher as follows: 15V 2A 30W Single Output Switching Power Supply Voltage...http://www.ebay.com.au/itm/280764693188?ssPageName=STRK:MEWNX:IT_trksid=p3984.m1497.l2649(280764693188) cost AU$13.00 inc postage. Its small and easy to use. For the 5Volt either a 7805 or a dc-dc switcher that are available on ebay for very little. Regards Max On Fri, Jan 6, 2012 at 4:24 PM, Orin Eman orin.e...@gmail.com wrote: On Thu, Jan 5, 2012 at 6:11 PM, time-n...@custodes.info wrote: Thanks, but what are people using to feed it? I'm having trouble pinning down power requirements. http://www.freqelec.com/rb_osc_fe5680a.htmlsays 32W peak, but then also 15-18v@700mA, which doesn't make sense. I'm still waiting on the slow boat from China, so I have a while to find a power supply. I'm using a Mastech HY5020E* set to 15V to test mine. Yes, complete overkill, but it's the only supply I have that will do 1A at 15V. 14V would have been easy. I supplied the 5V with a 7805 (I left the 5680 screwed to the circuit board it came on and held the 7805 down with one of the allen screws). BTW, the wires from the plug to the circuit board were standard color code, matching the pin numbers, so it was really easy to wire up by cutting and splicing the existing wires (with a little heat shrink tubing to keep things honest). The Mastech shows 1.8A to start, dropping to 0.8A after a few minutes, including whatever the 7805/5V line is using. *the HY5020E gets really confused when you turn it off. As the voltage drops - it seems to flip back and forth between constant current and constant voltage modes for many seconds, blinking its displays and LEDs on and off! Orin, KJ7HQ. ___ 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] Power supply for 'Bay FE-5680A?
On Jan 5, 2012, at 9:55 PM, time-n...@custodes.info wrote: On Jan 5, 2012, at 9:33 PM, shali...@gmail.com wrote: Most laptop supplies operate around 19 or 20 volts. Its a good place to start if you want to get 15V through a linear regulator. I have used Nintendo Wii supplies for 12V applications that require less than 3.5A. Chinese clones of those can be bought on eBay for less than $10 with shipping. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... So a cheap switcher down to 18-20v and a pair of linear regulators to get the 5 and 15v? I was hoping for something more off-the-shelf; my T-bolt is running off the power supply in the TAPR/tvb group buy from a few years ago. What about a Mean Well DR-4515, http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_221874_-1 and a 7805? 15v at 2.8A with 240mVp-p max ripple. ___ 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] Power supply for 'Bay FE-5680A?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chris Albertson wrote: On Thu, Jan 5, 2012 at 6:11 PM, time-n...@custodes.info wrote: l http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. Have you measured the case temperature of your FE5680? I put mine on a heat sink and the case temperature stays around 50C. Without the heat sink it was around 60C. Does anyone know what temperature is recommended? The 50C seems a little hot, but the unit appears to work well. - -- Bob Smither, PhD Circuit Concepts, Inc. = Government is not healthy for children and other living things. -- Jeff Daiell = smit...@c-c-i.com http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - http://enigmail.mozdev.org iD8DBQFPBxXFsmY7BY+CYksRAlutAJ9R9STR0oja4ib1CjKXLEfGe3uXpgCfRW8D m78FO0Trn+6bIBPKrNs8PVQ= =FdtA -END PGP SIGNATURE- attachment: smither.vcf___ 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] Power supply for 'Bay FE-5680A?
The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. It appears the unit was expected to be rather hot when running. I have mine mounted on the out side of the box using standoffs. On 01/06/2012 07:39 AM, Bob Smither wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chris Albertson wrote: On Thu, Jan 5, 2012 at 6:11 PM,time-n...@custodes.info wrote: lhttp://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. Have you measured the case temperature of your FE5680? I put mine on a heat sink and the case temperature stays around 50C. Without the heat sink it was around 60C. Does anyone know what temperature is recommended? The 50C seems a little hot, but the unit appears to work well. - -- Bob Smither, PhD Circuit Concepts, Inc. = Government is not healthy for children and other living things. -- Jeff Daiell = smit...@c-c-i.com http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - http://enigmail.mozdev.org iD8DBQFPBxXFsmY7BY+CYksRAlutAJ9R9STR0oja4ib1CjKXLEfGe3uXpgCfRW8D m78FO0Trn+6bIBPKrNs8PVQ= =FdtA -END PGP SIGNATURE- ___ 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. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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] Power supply for 'Bay FE-5680A?
A heat sink may not be required, per se, although I would expect that a larger thermal mass and/or thermal regulation via a closed loop fan controller will help smooth out/stabilize temperature effects. On 01/06/12, Chuck Forsberg WA7KGX N2469Rc...@omen.com wrote: The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. It appears the unit was expected to be rather hot when running. I have mine mounted on the out side of the box using standoffs. On 01/06/2012 07:39 AM, Bob Smither wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chris Albertson wrote: On Thu, Jan 5, 2012 at 6:11 PM,[1]time-n...@custodes.info wrote: l[2]http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. Have you measured the case temperature of your FE5680? I put mine on a heat sink and the case temperature stays around 50C. Without the heat sink it was around 60C. Does anyone know what temperature is recommended? The 50C seems a little hot, but the unit appears to work well. - -- Bob Smither, PhD Circuit Concepts, Inc. === == Government is not healthy for children and other living things. -- Jeff Daiell === == [3]smit...@c-c-i.com [4]http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - [5]http://enigmail.mozdev.org iD8DBQFPBxXFsmY7BY+CYksRAlutAJ9R9STR0oja4ib1CjKXLEfGe3uXpgCfRW8D m78FO0Trn+6bIBPKrNs8PVQ= =FdtA -END PGP SIGNATURE- ___ time-nuts mailing list -- [6]time-nuts@febo.com To unsubscribe, go to [7]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chuck Forsberg WA7KGX N2469R [8]c...@omen.com [9]www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- [10]time-nuts@febo.com To unsubscribe, go to [11]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. mailto:time-n...@custodes.info 2. http://www.freqelec.com/rb_osc_fe5680a.html 3. mailto:smit...@c-c-i.com 4. http://www.C-C-I.Com/ 5. http://enigmail.mozdev.org/ 6. mailto:time-nuts@febo.com 7. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 8. mailto:c...@omen.com 9. http://www.omen.com/ 10. mailto:time-nuts@febo.com 11. 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] Power supply for 'Bay FE-5680A?
Le 06/01/2012 17:02, Chuck Forsberg WA7KGX N2469R a écrit : The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. Yes, I am inclined to agree as I suspect these devices were designed to run in uncontrolled temperature environments. Maybe the test would be to measure the current draw over temperature, when the box thinks it is warm enough it will stop heating the cell and xo and so that is where it was designed to sit. I will also save you $$s in electricity. Downside could be that hotter parts degrade faster. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Power supply for 'Bay FE-5680A?
On Fri, 06 Jan 2012 17:47:47 +0100, mike cook michael.c...@sfr.fr wrote: Le 06/01/2012 17:02, Chuck Forsberg WA7KGX N2469R a écrit : The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. Yes, I am inclined to agree as I suspect these devices were designed to run in uncontrolled temperature environments. Maybe the test would be to measure the current draw over temperature, when the box thinks it is warm enough it will stop heating the cell and xo and so that is where it was designed to sit. I will also save you $$s in electricity. Downside could be that hotter parts degrade faster. What about placing thermal insulation around the oven or even the entire unit if the heat leakage is kept greater than the total dissipation? I have occasionally used a Dixie cup for thermal isolation but the only place I have used active thermal control is logarithm and exponential amplifiers. ___ 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] Power supply for 'Bay FE-5680A?
Le 06/01/2012 18:05, David a écrit : Yes, I am inclined to agree as I suspect these devices were designed to run in uncontrolled temperature environments. Maybe the test would be to measure the current draw over temperature, when the box thinks it is warm enough it will stop heating the cell and xo and so that is where it was designed to sit. I will also save you $$s in electricity. Downside could be that hotter parts degrade faster. What about placing thermal insulation around the oven or even the entire unit if the heat leakage is kept greater than the total dissipation? I I would think that some well tuned passive or active thermal control will help stability as some have reported, but I don't think going out to cool at all costs is productive. ___ 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] Power supply for 'Bay FE-5680A?
Hi I've been down this road with several Rb's. The answer is fairly simple. They work fine with a hot base plate. They don't work any better or worse with a hot plate than a cold(er) one though. The gotcha is that the MTBF of the parts in the unit is indeed impacted by the higher temperature. Hotter = stuff fails faster. With no heat sink, you will run fine for a number of months or even a couple of years. Then something odd dies. It may or may not take other stuff with it. I'm a slow learner and have killed to many Rb's this way. If you heat sink them, they do indeed pull a little more power in the heaters. I have not seen one fail from overworked heaters when heat sinked. There's nothing magic about the heat sink. A chunk of PCB material or a scrap piece of aluminum plate can do the job. Most of the datasheets get around this by specifying base plate temperature rather than ambient. In some cases the fine print that obscures that point is pretty far down in the spec. Usually that gets taken as hottest part of bottom of the unit. Of course with cheap Rb's you can toss one out when it fries and just replace it... Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Chuck Forsberg WA7KGX N2469R Sent: Friday, January 06, 2012 11:02 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Power supply for 'Bay FE-5680A? The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. It appears the unit was expected to be rather hot when running. I have mine mounted on the out side of the box using standoffs. On 01/06/2012 07:39 AM, Bob Smither wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chris Albertson wrote: On Thu, Jan 5, 2012 at 6:11 PM,time-n...@custodes.info wrote: lhttp://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. Have you measured the case temperature of your FE5680? I put mine on a heat sink and the case temperature stays around 50C. Without the heat sink it was around 60C. Does anyone know what temperature is recommended? The 50C seems a little hot, but the unit appears to work well. - -- Bob Smither, PhD Circuit Concepts, Inc. = Government is not healthy for children and other living things. -- Jeff Daiell = smit...@c-c-i.com http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - http://enigmail.mozdev.org iD8DBQFPBxXFsmY7BY+CYksRAlutAJ9R9STR0oja4ib1CjKXLEfGe3uXpgCfRW8D m78FO0Trn+6bIBPKrNs8PVQ= =FdtA -END PGP SIGNATURE- ___ 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. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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] Power supply for 'Bay FE-5680A?
Hi What are you using the Rb for? A switcher is going to put even more hash on an already dirty 10 MHz output on the Rb. That may or may not be an issue to you. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of time-n...@custodes.info Sent: Thursday, January 05, 2012 9:56 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Power supply for 'Bay FE-5680A? On Jan 5, 2012, at 9:33 PM, shali...@gmail.com wrote: Most laptop supplies operate around 19 or 20 volts. Its a good place to start if you want to get 15V through a linear regulator. I have used Nintendo Wii supplies for 12V applications that require less than 3.5A. Chinese clones of those can be bought on eBay for less than $10 with shipping. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... So a cheap switcher down to 18-20v and a pair of linear regulators to get the 5 and 15v? I was hoping for something more off-the-shelf; my T-bolt is running off the power supply in the TAPR/tvb group buy from a few years ago. ___ 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] Power supply for 'Bay FE-5680A?
I do not care for this test but later on I will use a LDO and a clean up OCXO. Bert In a message dated 1/6/2012 12:37:46 P.M. Eastern Standard Time, li...@rtty.us writes: Hi What are you using the Rb for? A switcher is going to put even more hash on an already dirty 10 MHz output on the Rb. That may or may not be an issue to you. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of time-n...@custodes.info Sent: Thursday, January 05, 2012 9:56 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Power supply for 'Bay FE-5680A? On Jan 5, 2012, at 9:33 PM, shali...@gmail.com wrote: Most laptop supplies operate around 19 or 20 volts. Its a good place to start if you want to get 15V through a linear regulator. I have used Nintendo Wii supplies for 12V applications that require less than 3.5A. Chinese clones of those can be bought on eBay for less than $10 with shipping. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... So a cheap switcher down to 18-20v and a pair of linear regulators to get the 5 and 15v? I was hoping for something more off-the-shelf; my T-bolt is running off the power supply in the TAPR/tvb group buy from a few years ago. ___ 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] Power supply for 'Bay FE-5680A?
Eventually, I think a reference clock for an HPSDR and/or PLL'd up and used to clock my net4501. -- Ian, KB9VEX On Jan 6, 2012, at 12:53 PM, ewkeh...@aol.com wrote: I do not care for this test but later on I will use a LDO and a clean up OCXO. Bert In a message dated 1/6/2012 12:37:46 P.M. Eastern Standard Time, li...@rtty.us writes: Hi What are you using the Rb for? A switcher is going to put even more hash on an already dirty 10 MHz output on the Rb. That may or may not be an issue to you. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of time-n...@custodes.info Sent: Thursday, January 05, 2012 9:56 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Power supply for 'Bay FE-5680A? On Jan 5, 2012, at 9:33 PM, shali...@gmail.com wrote: Most laptop supplies operate around 19 or 20 volts. Its a good place to start if you want to get 15V through a linear regulator. I have used Nintendo Wii supplies for 12V applications that require less than 3.5A. Chinese clones of those can be bought on eBay for less than $10 with shipping. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... So a cheap switcher down to 18-20v and a pair of linear regulators to get the 5 and 15v? I was hoping for something more off-the-shelf; my T-bolt is running off the power supply in the TAPR/tvb group buy from a few years ago. ___ 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] Power supply for 'Bay FE-5680A?
I do not understand why this is even discussed. Running at lower temperature will extend life and using a fan with temperature control will cost no more than $ 12 and I challenge any of you how I can get for so little money more than one order of magnitude improvement. As I reported before I started out with heat sink only and quickly realized that I would not be able to measure aging because the last 2 digits where all over the place and unless you have an environment where your lab is within 0.1C you are throwing away the real advantage of a Rb. I did enclose the Rb cell and the OCXO on a FEI 5962B, its modularity lends it self for such testing, it was not worth the effort and the power saving was minimal. Once my aging tests are completed I will test for 15 V voltage sensitivity. Bert Kehren In a message dated 1/6/2012 11:35:02 A.M. Eastern Standard Time, n...@verizon.net writes: A heat sink may not be required, per se, although I would expect that a larger thermal mass and/or thermal regulation via a closed loop fan controller will help smooth out/stabilize temperature effects. On 01/06/12, Chuck Forsberg WA7KGX N2469Rc...@omen.com wrote: The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. It appears the unit was expected to be rather hot when running. I have mine mounted on the out side of the box using standoffs. On 01/06/2012 07:39 AM, Bob Smither wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chris Albertson wrote: On Thu, Jan 5, 2012 at 6:11 PM,[1]time-n...@custodes.info wrote: l[2]http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. Have you measured the case temperature of your FE5680? I put mine on a heat sink and the case temperature stays around 50C. Without the heat sink it was around 60C. Does anyone know what temperature is recommended? The 50C seems a little hot, but the unit appears to work well. - -- Bob Smither, PhD Circuit Concepts, Inc. === == Government is not healthy for children and other living things. -- Jeff Daiell === == [3]smit...@c-c-i.com [4]http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - [5]http://enigmail.mozdev.org iD8DBQFPBxXFsmY7BY+CYksRAlutAJ9R9STR0oja4ib1CjKXLEfGe3uXpgCfRW8D m78FO0Trn+6bIBPKrNs8PVQ= =FdtA -END PGP SIGNATURE- ___ time-nuts mailing list -- [6]time-nuts@febo.com To unsubscribe, go to [7]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chuck Forsberg WA7KGX N2469R [8]c...@omen.com [9]www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- [10]time-nuts@febo.com To unsubscribe, go to [11]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. mailto:time-n...@custodes.info 2. http://www.freqelec.com/rb_osc_fe5680a.html 3. mailto:smit...@c-c-i.com 4. http://www.C-C-I.Com/ 5. http://enigmail.mozdev.org/ 6. mailto:time-nuts@febo.com 7. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 8. mailto:c...@omen.com 9. http://www.omen.com/ 10. mailto:time-nuts@febo.com 11. 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. ___ 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] Power supply for 'Bay FE-5680A?
What kind of temperature controlled fan did you use? On 01/06/12, ewkeh...@aol.com wrote: I do not understand why this is even discussed. Running at lower temperature will extend life and using a fan with temperature control will cost no more than $ 12 and I challenge any of you how I can get for so little money more than one order of magnitude improvement. As I reported before I started out with heat sink only and quickly realized that I would not be able to measure aging because the last 2 digits where all over the place and unless you have an environment where your lab is within 0.1C you are throwing away the real advantage of a Rb. I did enclose the Rb cell and the OCXO on a FEI 5962B, its modularity lends it self for such testing, it was not worth the effort and the power saving was minimal. Once my aging tests are completed I will test for 15 V voltage sensitivity. Bert Kehren In a message dated 1/6/2012 11:35:02 A.M. Eastern Standard Time, n...@verizon.net writes: A heat sink may not be required, per se, although I would expect that a larger thermal mass and/or thermal regulation via a closed loop fan controller will help smooth out/stabilize temperature effects. On 01/06/12, Chuck Forsberg WA7KGX N2469Rc...@omen.com wrote: The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. It appears the unit was expected to be rather hot when running. I have mine mounted on the out side of the box using standoffs. On 01/06/2012 07:39 AM, Bob Smither wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chris Albertson wrote: On Thu, Jan 5, 2012 at 6:11 PM,[1]time-n...@custodes.info wrote: l[2]http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. Have you measured the case temperature of your FE5680? I put mine on a heat sink and the case temperature stays around 50C. Without the heat sink it was around 60C. Does anyone know what temperature is recommended? The 50C seems a little hot, but the unit appears to work well. - -- Bob Smither, PhD Circuit Concepts, Inc. === == Government is not healthy for children and other living things. -- Jeff Daiell === == [3]smit...@c-c-i.com [4]http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - [5]http://enigmail.mozdev.org iD8DBQFPBxXFsmY7BY+CYksRAlutAJ9R9STR0oja4ib1CjKXLEfGe3uXpgCfRW8D m78FO0Trn+6bIBPKrNs8PVQ= =FdtA -END PGP SIGNATURE- ___ time-nuts mailing list -- [6]time-nuts@febo.com To unsubscribe, go to [7]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chuck Forsberg WA7KGX N2469R [8]c...@omen.com [9]www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- [10]time-nuts@febo.com To unsubscribe, go to [11]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. mailto:time-n...@custodes.info 2. http://www.freqelec.com/rb_osc_fe5680a.html 3. mailto:smit...@c-c-i.com 4. http://www.C-C-I.Com/ 5. http://enigmail.mozdev.org/ 6. mailto:time-nuts@febo.com 7. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 8. mailto:c...@omen.com 9. http://www.omen.com/ 10. mailto:time-nuts@febo.com 11. 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. ___ 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
Re: [time-nuts] Power supply for 'Bay FE-5680A?
As I understand it, the physics package needs to get quite hot to work. I would expect the physics package to be well insulated and off by itself, but this doesn't seem to be the case. On 01/06/2012 10:06 AM, ewkeh...@aol.com wrote: I do not understand why this is even discussed. Running at lower temperature will extend life and using a fan with temperature control will cost no more than $ 12 and I challenge any of you how I can get for so little money more than one order of magnitude improvement. As I reported before I started out with heat sink only and quickly realized that I would not be able to measure aging because the last 2 digits where all over the place and unless you have an environment where your lab is within 0.1C you are throwing away the real advantage of a Rb. I did enclose the Rb cell and the OCXO on a FEI 5962B, its modularity lends it self for such testing, it was not worth the effort and the power saving was minimal. Once my aging tests are completed I will test for 15 V voltage sensitivity. Bert Kehren In a message dated 1/6/2012 11:35:02 A.M. Eastern Standard Time, n...@verizon.net writes: A heat sink may not be required, per se, although I would expect that a larger thermal mass and/or thermal regulation via a closed loop fan controller will help smooth out/stabilize temperature effects. On 01/06/12, Chuck Forsberg WA7KGX N2469Rc...@omen.com wrote: The Tech Manual does not call for heat sinking (unless I missed something). The top has labels over much of the surface. The bottom has a plastic sheet between the circuitry and bottom plate. It appears the unit was expected to be rather hot when running. I have mine mounted on the out side of the box using standoffs. On 01/06/2012 07:39 AM, Bob Smither wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chris Albertson wrote: On Thu, Jan 5, 2012 at 6:11 PM,[1]time-n...@custodes.info wrote: l[2]http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. Have you measured the case temperature of your FE5680? I put mine on a heat sink and the case temperature stays around 50C. Without the heat sink it was around 60C. Does anyone know what temperature is recommended? The 50C seems a little hot, but the unit appears to work well. - -- Bob Smither, PhD Circuit Concepts, Inc. === == Government is not healthy for children and other living things. -- Jeff Daiell === == [3]smit...@c-c-i.com [4]http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - [5]http://enigmail.mozdev.org iD8DBQFPBxXFsmY7BY+CYksRAlutAJ9R9STR0oja4ib1CjKXLEfGe3uXpgCfRW8D m78FO0Trn+6bIBPKrNs8PVQ= =FdtA -END PGP SIGNATURE- ___ time-nuts mailing list -- [6]time-nuts@febo.com To unsubscribe, go to [7]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chuck Forsberg WA7KGX N2469R [8]c...@omen.com [9]www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- [10]time-nuts@febo.com To unsubscribe, go to [11]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. mailto:time-n...@custodes.info 2. http://www.freqelec.com/rb_osc_fe5680a.html 3. mailto:smit...@c-c-i.com 4. http://www.C-C-I.Com/ 5. http://enigmail.mozdev.org/ 6. mailto:time-nuts@febo.com 7. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 8. mailto:c...@omen.com 9. http://www.omen.com/ 10. mailto:time-nuts@febo.com 11. 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. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go
Re: [time-nuts] Power supply for 'Bay FE-5680A?
I don't know what all the grief is about a power supply to run the 5680 units. I have three 5380/Trimble GPs units in various locations being powered by Mean Well power supplies from Mouser. # 709-T40C for about 50 bucks - 75 bucks for one with more current. It is a switching ps but seems clean in our lab. For a hundred bucks you have a RB standard. Spend the bucks!! 73, Bill, WA2DVU Cape May, NJ ___ 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] Power supply for 'Bay FE-5680A?
On Fri, Jan 6, 2012 at 12:22 PM, Bill Riches bill.ric...@verizon.net wrote: I don't know what all the grief is about a power supply to run the 5680 units. I have three 5380/Trimble GPs units in various locations being powered by Mean Well power supplies from Mouser. # 709-T40C for about 50 bucks - 75 bucks for one with more current. It is a switching ps but seems clean in our lab. For a hundred bucks you have a RB standard. Spend the bucks!! If you like open frame PS better then the plug-in boxes All Electronics has an open frame 15V switching power supply for $11. http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html 73, Bill, WA2DVU Cape May, NJ ___ 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. -- 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] Power supply for 'Bay FE-5680A?
Have to agree thats very attractive. Few bucks for shipping and you are done. On Fri, Jan 6, 2012 at 3:39 PM, Chris Albertson albertson.ch...@gmail.comwrote: On Fri, Jan 6, 2012 at 12:22 PM, Bill Riches bill.ric...@verizon.net wrote: I don't know what all the grief is about a power supply to run the 5680 units. I have three 5380/Trimble GPs units in various locations being powered by Mean Well power supplies from Mouser. # 709-T40C for about 50 bucks - 75 bucks for one with more current. It is a switching ps but seems clean in our lab. For a hundred bucks you have a RB standard. Spend the bucks!! If you like open frame PS better then the plug-in boxes All Electronics has an open frame 15V switching power supply for $11. http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html 73, Bill, WA2DVU Cape May, NJ ___ 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. -- 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] Power supply for 'Bay FE-5680A?
Can anyone recommend how to power one of the latest crop of 2nd hand FE-5680As? Are they the ones that need only 15-18vdc, or do they need the 5v line as well? ___ 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] Power supply for 'Bay FE-5680A?
If it is labeled FEI P/N 217400-30352-1 the response is yes. Ignacio, EB4APL On 06/01/2012 1:55, Ian Bobbitt wrote: Can anyone recommend how to power one of the latest crop of 2nd hand FE-5680As? Are they the ones that need only 15-18vdc, or do they need the 5v line as well? ___ 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] Power supply for 'Bay FE-5680A?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 EB4APL wrote: If it is labeled FEI P/N 217400-30352-1 the response is yes. Ditto - this is the same P/N of the one I have. It takes both a 15 V and a 5 V supply. The pin numbers reported here earlier are correct: PIN 1: INPUT +15V to +18V PIN 2: GROUND PIN 3: LOCK/UNLOCK (high = unlock) PIN 4: INPUT +5V PIN 5: GROUND PIN 7: OUTPUT ( 10MHz sinewave ) Pin 6 has a (weak) 1pps. Pins 8 and 9 are for the RS232 interface. - -- Bob Smither, PhD Circuit Concepts, Inc. = Q.: What do the Chaplains of the United States Senate and House of Representatives do? A.: They stand at the rostrum, look at the legislators, and pray for the country. = smit...@c-c-i.com http://www.C-C-I.Com 281-331-2744(office) -4616(fax) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with CentOS - http://enigmail.mozdev.org iD8DBQFPBlE9smY7BY+CYksRAj8DAJsEBIY+LsxxjpvbwfBNogmBZ3n8NgCgl4Mj u74wNlr2NN4ATEZIz823WC8= =/bw0 -END PGP SIGNATURE- attachment: smither.vcf___ 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] Power supply for 'Bay FE-5680A?
Thanks, but what are people using to feed it? I'm having trouble pinning down power requirements. http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. I'm still waiting on the slow boat from China, so I have a while to find a power supply. On Jan 5, 2012, at 8:23 PM, EB4APL wrote: If it is labeled FEI P/N 217400-30352-1 the response is yes. Ignacio, EB4APL On 06/01/2012 1:55, Ian Bobbitt wrote: Can anyone recommend how to power one of the latest crop of 2nd hand FE-5680As? Are they the ones that need only 15-18vdc, or do they need the 5v line as well? ___ 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] Power supply for 'Bay FE-5680A?
On Thu, Jan 5, 2012 at 4:55 PM, Ian Bobbitt time-n...@custodes.info wrote: Can anyone recommend how to power one of the latest crop of 2nd hand FE-5680As? Are they the ones that need only 15-18vdc, or do they need the 5v line as well? The latest batch of $40 units require +5V too. I measure about 80mA on the 5V suply. So you could make 5V with an LM7805 if you have 15 volts nearby.The 7805 would only burn 800mW. the 15V supply needs a solid 1.8A for about five minutes. and then drops to less than 1/2 of that.The spec says 300mV or ripple is alowed I'd using a lab type bench supply now but my plan is to use a laptop type supply that has a large coax type DC plug. I've seen some that as labeled as 15V, 6Afor $11 (shipped) on eBay Older Tosiba laptops used 15V I don't really like switching supplies like this so I'm thinking of getting a 24V laptop supply and re-regulating it with a 7815 and a pass transisor so that the FE5680 sees a linier supply. In the end I bet I do both. Real soon now, like tomorrow I'm going to need a supply for a Thunderbolt too. I'll likely build two of those as well. 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] Power supply for 'Bay FE-5680A?
On Thu, Jan 5, 2012 at 6:11 PM, time-n...@custodes.info wrote: l http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. It will pull 35W for the first five or so minutes then the current drops rather suddenly to about 700mA. I have an analog amp meter on my power supply and I can see a switch over after the unit heats up. They must run an internal oven heater full tilt at first then go into regulated mode. Some one else said you can cause the FE5680 to draw more power in steady state mode by adding heat sinking it. Yes that works. Seems the FE5680 wants to be at some set temperature and the heat sink means it takes more power to keep at the set point. I just let the fe5680 rest on a small aluminum plate. 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] Power supply for 'Bay FE-5680A?
On start up from cold condition, 15V at 1.8Amps -2.1Amps (27W -31.5W) Running after warm up, 15V at 800mA (12W) Plus 5V at 85mA (0.425W) John WA4WDL -- From: time-n...@custodes.info Sent: Thursday, January 05, 2012 9:11 PM To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Power supply for 'Bay FE-5680A? Thanks, but what are people using to feed it? I'm having trouble pinning down power requirements. http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. I'm still waiting on the slow boat from China, so I have a while to find a power supply. On Jan 5, 2012, at 8:23 PM, EB4APL wrote: If it is labeled FEI P/N 217400-30352-1 the response is yes. Ignacio, EB4APL On 06/01/2012 1:55, Ian Bobbitt wrote: Can anyone recommend how to power one of the latest crop of 2nd hand FE-5680As? Are they the ones that need only 15-18vdc, or do they need the 5v line as well? ___ 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] Power supply for 'Bay FE-5680A?
Most laptop supplies operate around 19 or 20 volts. Its a good place to start if you want to get 15V through a linear regulator. I have used Nintendo Wii supplies for 12V applications that require less than 3.5A. Chinese clones of those can be bought on eBay for less than $10 with shipping. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: Chris Albertson albertson.ch...@gmail.com Sender: time-nuts-boun...@febo.com Date: Thu, 5 Jan 2012 18:18:04 To: Discussion of precise time and frequency measurementtime-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Power supply for 'Bay FE-5680A? On Thu, Jan 5, 2012 at 4:55 PM, Ian Bobbitt time-n...@custodes.info wrote: Can anyone recommend how to power one of the latest crop of 2nd hand FE-5680As? Are they the ones that need only 15-18vdc, or do they need the 5v line as well? The latest batch of $40 units require +5V too. I measure about 80mA on the 5V suply. So you could make 5V with an LM7805 if you have 15 volts nearby.The 7805 would only burn 800mW. the 15V supply needs a solid 1.8A for about five minutes. and then drops to less than 1/2 of that.The spec says 300mV or ripple is alowed I'd using a lab type bench supply now but my plan is to use a laptop type supply that has a large coax type DC plug. I've seen some that as labeled as 15V, 6Afor $11 (shipped) on eBay Older Tosiba laptops used 15V I don't really like switching supplies like this so I'm thinking of getting a 24V laptop supply and re-regulating it with a 7815 and a pass transisor so that the FE5680 sees a linier supply. In the end I bet I do both. Real soon now, like tomorrow I'm going to need a supply for a Thunderbolt too. I'll likely build two of those as well. 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] Power supply for 'Bay FE-5680A?
On Jan 5, 2012, at 9:33 PM, shali...@gmail.com wrote: Most laptop supplies operate around 19 or 20 volts. Its a good place to start if you want to get 15V through a linear regulator. I have used Nintendo Wii supplies for 12V applications that require less than 3.5A. Chinese clones of those can be bought on eBay for less than $10 with shipping. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... So a cheap switcher down to 18-20v and a pair of linear regulators to get the 5 and 15v? I was hoping for something more off-the-shelf; my T-bolt is running off the power supply in the TAPR/tvb group buy from a few years ago. ___ 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] Power supply for 'Bay FE-5680A?
On Thu, Jan 5, 2012 at 6:11 PM, time-n...@custodes.info wrote: Thanks, but what are people using to feed it? I'm having trouble pinning down power requirements. http://www.freqelec.com/rb_osc_fe5680a.html says 32W peak, but then also 15-18v@700mA, which doesn't make sense. I'm still waiting on the slow boat from China, so I have a while to find a power supply. I'm using a Mastech HY5020E* set to 15V to test mine. Yes, complete overkill, but it's the only supply I have that will do 1A at 15V. 14V would have been easy. I supplied the 5V with a 7805 (I left the 5680 screwed to the circuit board it came on and held the 7805 down with one of the allen screws). BTW, the wires from the plug to the circuit board were standard color code, matching the pin numbers, so it was really easy to wire up by cutting and splicing the existing wires (with a little heat shrink tubing to keep things honest). The Mastech shows 1.8A to start, dropping to 0.8A after a few minutes, including whatever the 7805/5V line is using. *the HY5020E gets really confused when you turn it off. As the voltage drops - it seems to flip back and forth between constant current and constant voltage modes for many seconds, blinking its displays and LEDs on and off! Orin, KJ7HQ. ___ 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.
