Re: [time-nuts] 15 volt power supply for FE-5680A on eBay
On Sat, Jan 21, 2012 at 3:57 PM, Paul F. Sehorne wrote: > Good that you pointed that out to me. I ran the test again. The > voltage at the power supply terminals never dropped below 15.25 vdc with up > to 3 amp load applied. When will I learn... darn those clip leads got me... > again. Chuck those leads in the thrash right away while you are thinking of it. 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] 15 volt power supply for FE-5680A on eBay
Good that you pointed that out to me. I ran the test again. The voltage at the power supply terminals never dropped below 15.25 vdc with up to 3 amp load applied. When will I learn... darn those clip leads got me... again. On 1/21/2012 5:34 PM, David wrote: The total regulation specification is +/- 5% so within 14.25 to 15.75 volts under all conditions. How high was your lead resistance? ___ 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] 15 volt power supply for FE-5680A on eBay
I'll have to set up the test again and measure voltage drop across the leads and the voltage directly at the power supply supply terminals. On 1/21/2012 5:34 PM, David wrote: On Sat, 21 Jan 2012 17:20:39 -0600, "Paul F. Sehorne" wrote: On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson wrote: What I bought is a 15V open frame supply from allelectronics.com for $11.50. It turned out to be a very high quality power supply (Digikey has the same unit for almost $40) This PS does not drop volts even with the line input and load well out of spec (I tested 63VAC input to a 4A load briefly) ... This is the one I bought http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html I ordered two of the above mentioned power supplies. They arrived today. I tested both of them. Neither holds 15 volts. At 2 amps they are down to 14 volts. Even at 1 amp they are down to 14.5 vdc. The total regulation specification is +/- 5% so within 14.25 to 15.75 volts under all conditions. How high was your lead resistance? http://iccnexergy.com/elpac/medical-power-supplies/open-frame/mta040/ ___ 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] 15 volt power supply for FE-5680A on eBay
On Sat, 21 Jan 2012 17:20:39 -0600, "Paul F. Sehorne" wrote: >On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson >wrote: What I bought is a 15V open frame supply from allelectronics.com for $11.50. It turned out to be a very high quality power supply (Digikey has the same unit for almost $40) This PS does not drop volts even with the line input and load well out of spec (I tested 63VAC input to a 4A load briefly) ... This is the one I bought http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html >> > >I ordered two of the above mentioned power supplies. They arrived >today. I tested both of them. >Neither holds 15 volts. At 2 amps they are down to 14 volts. Even at 1 >amp they are down to 14.5 vdc. The total regulation specification is +/- 5% so within 14.25 to 15.75 volts under all conditions. How high was your lead resistance? http://iccnexergy.com/elpac/medical-power-supplies/open-frame/mta040/ ___ 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] 15 volt power supply for FE-5680A on eBay
On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson wrote: What I bought is a 15V open frame supply from allelectronics.com for $11.50. It turned out to be a very high quality power supply (Digikey has the same unit for almost $40) This PS does not drop volts even with the line input and load well out of spec (I tested 63VAC input to a 4A load briefly) ... This is the one I bought http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html I ordered two of the above mentioned power supplies. They arrived today. I tested both of them. Neither holds 15 volts. At 2 amps they are down to 14 volts. Even at 1 amp they are down to 14.5 vdc. Paul ___ 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] 15 volt power supply for FE-5680A on eBay
Correcting link http://www.ko4bb.com/dokuwiki/doku.php On 1/20/2012 10:47 AM, shali...@gmail.com wrote: I started a wiki page with the pin-out information ans was planning to copy the most interesting posts, but I do not have one, so the incentive is pretty low at this point. If you want to do it, be my guest. http://wwwmko4bb.com/dokuwiki/doku.php Didier KO4BB ___ 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] 15 volt power supply for FE-5680A on eBay
Hi Didier, That link didn't work. Can you check and re-send? Thanks. Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of shali...@gmail.com Sent: 20 January 2012 16:48 To: Time-Nuts Subject: Re: [time-nuts] 15 volt power supply for FE-5680A on eBay I started a wiki page with the pin-out information ans was planning to copy the most interesting posts, but I do not have one, so the incentive is pretty low at this point. If you want to do it, be my guest. http://wwwmko4bb.com/dokuwiki/doku.php Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: ewkeh...@aol.com Sender: time-nuts-boun...@febo.com Date: Thu, 19 Jan 2012 06:34:13 To: Reply-To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 15 volt power supply for FE-5680A on eBay Pete Thank you this is valuable info. I noticed that an effort is underway to centralize info on the 5680. Would be nice if some one with time and software expertize would combine all the information. I cut and paste what ever I find on the list and will be glad to forward it to a volunteer. This kind of findings should be included. Bert Kehren In a message dated 1/18/2012 8:47:54 P.M. Eastern Standard Time, bell.pe...@gmail.com writes: One of the regulators (the one that runs the lamp and lamp heater) is running at 13.8V and has a 500mV dropout voltage, so there is very little (~ 700mV) headroom. The one that runs the cell heater is about a volt lower and the one that runs the analog circuits is set to 8.8V, so has plenty of headroom. I suspect the lamp regulator is mostly there to reduce the start-up current, though - the FE-5650 has a very similar lamp circuit with no regulator and the only significant difference seems to be that the current pulled when the unit is cold is higher. Regards, Pete Bell On Thu, Jan 19, 2012 at 8:19 AM, paul swed wrote: > I think it is important. The specs say 15-18V. > So I would not drop below the spec. Though interestingly pretty much > everything inside the system is using switching supplies so perhaps > there is more room. > The gtood thing about the switchers is that as the input V goes up current > should go down if that helps you. > Regards > Paul. > > On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson > wrote: > >> I used a variable voltage bench supply to experiment. tried low >> voltage like you are seeing on my FE5680 and I never got a lock. The >> FE5680A spec sheet says 15 to 18 volts and I think you can get buy >> with 14.5V. i tried 12.5 and got "nothing" >> >> I did not test to find the "breaking point" But 1/2 volt low was >> OK and 2.5V low was not ok. >> >> What I bought is a 15V open frame supply from allelectronics.com for >> $11.50. It turned out to be a very high quality power supply (Digikey >> has the same unit for almost $40) This PS does not drop volts even >> with the line input and load well out of spec (I tested 63VAC input >> to a 4A load briefly) I added an RF "hash" filter "just because I >> could" and then an LM7805 and I think I'm OK. >> >> I thought about making a linear supply for the cleanest power but i >> intend to run this 24x7 and don't like wasting so much power. >> >> This is the one I bought >> >> http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPP LY/1.html >> >> >> On Wed, Jan 18, 2012 at 3:05 PM, Paul F. Sehorne wrote: >> > How important is the 15vdc at the initial startup 2amp, and then >> > how important at the .7 amp settled rate? >> > >> > I just received two of these >> > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 >> > >> > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 >> > volts and >> > with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 >> > volts >> with >> > a 5 amp load). Supposedly rated at 6 amps. I have only checked >> > one, >> have >> > not broken the packaging on the second one assuming its >> > performance will >> be >> > similar. >> > >> > Will this be a problem? >> > >> > Paul >> > >> > ___ >> > 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] 15 volt power supply for FE-5680A on eBay
I started a wiki page with the pin-out information ans was planning to copy the most interesting posts, but I do not have one, so the incentive is pretty low at this point. If you want to do it, be my guest. http://wwwmko4bb.com/dokuwiki/doku.php Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: ewkeh...@aol.com Sender: time-nuts-boun...@febo.com Date: Thu, 19 Jan 2012 06:34:13 To: Reply-To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 15 volt power supply for FE-5680A on eBay Pete Thank you this is valuable info. I noticed that an effort is underway to centralize info on the 5680. Would be nice if some one with time and software expertize would combine all the information. I cut and paste what ever I find on the list and will be glad to forward it to a volunteer. This kind of findings should be included. Bert Kehren In a message dated 1/18/2012 8:47:54 P.M. Eastern Standard Time, bell.pe...@gmail.com writes: One of the regulators (the one that runs the lamp and lamp heater) is running at 13.8V and has a 500mV dropout voltage, so there is very little (~ 700mV) headroom. The one that runs the cell heater is about a volt lower and the one that runs the analog circuits is set to 8.8V, so has plenty of headroom. I suspect the lamp regulator is mostly there to reduce the start-up current, though - the FE-5650 has a very similar lamp circuit with no regulator and the only significant difference seems to be that the current pulled when the unit is cold is higher. Regards, Pete Bell On Thu, Jan 19, 2012 at 8:19 AM, paul swed wrote: > I think it is important. The specs say 15-18V. > So I would not drop below the spec. Though interestingly pretty much > everything inside the system is using switching supplies so perhaps there > is more room. > The gtood thing about the switchers is that as the input V goes up current > should go down if that helps you. > Regards > Paul. > > On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson > wrote: > >> I used a variable voltage bench supply to experiment. tried low >> voltage like you are seeing on my FE5680 and I never got a lock. The >> FE5680A spec sheet says 15 to 18 volts and I think you can get buy >> with 14.5V. i tried 12.5 and got "nothing" >> >> I did not test to find the "breaking point" But 1/2 volt low was OK >> and 2.5V low was not ok. >> >> What I bought is a 15V open frame supply from allelectronics.com for >> $11.50. It turned out to be a very high quality power supply (Digikey >> has the same unit for almost $40) This PS does not drop volts even >> with the line input and load well out of spec (I tested 63VAC input >> to a 4A load briefly) I added an RF "hash" filter "just because I >> could" and then an LM7805 and I think I'm OK. >> >> I thought about making a linear supply for the cleanest power but i >> intend to run this 24x7 and don't like wasting so much power. >> >> This is the one I bought >> >> http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html >> >> >> On Wed, Jan 18, 2012 at 3:05 PM, Paul F. Sehorne wrote: >> > How important is the 15vdc at the initial startup 2amp, and then how >> > important at the .7 amp settled rate? >> > >> > I just received two of these >> > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 >> > >> > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and >> > with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts >> with >> > a 5 amp load). Supposedly rated at 6 amps. I have only checked one, >> have >> > not broken the packaging on the second one assuming its performance will >> be >> > similar. >> > >> > Will this be a problem? >> > >> > Paul >> > >> > ___ >> > 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] 15 volt power supply for FE-5680A on eBay
With the # of units in the hands of list members it makes sense to coordinate tests, characterizing the unit. The PICTIC is probably the only other device having that kind of penetration. Bert Kehren In a message dated 1/18/2012 8:17:29 P.M. Eastern Standard Time, li...@rtty.us writes: Hi I think you would want something with better regulation to really get the Rb to perform well. Bob On Jan 18, 2012, at 6:05 PM, "Paul F. Sehorne" wrote: > How important is the 15vdc at the initial startup 2amp, and then how important at the .7 amp settled rate? > > I just received two of these > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 > > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts with a 5 amp load). Supposedly rated at 6 amps. I have only checked one, have not broken the packaging on the second one assuming its performance will be similar. > > Will this be a problem? > > Paul > > ___ > 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] 15 volt power supply for FE-5680A on eBay
Pete Thank you this is valuable info. I noticed that an effort is underway to centralize info on the 5680. Would be nice if some one with time and software expertize would combine all the information. I cut and paste what ever I find on the list and will be glad to forward it to a volunteer. This kind of findings should be included. Bert Kehren In a message dated 1/18/2012 8:47:54 P.M. Eastern Standard Time, bell.pe...@gmail.com writes: One of the regulators (the one that runs the lamp and lamp heater) is running at 13.8V and has a 500mV dropout voltage, so there is very little (~ 700mV) headroom. The one that runs the cell heater is about a volt lower and the one that runs the analog circuits is set to 8.8V, so has plenty of headroom. I suspect the lamp regulator is mostly there to reduce the start-up current, though - the FE-5650 has a very similar lamp circuit with no regulator and the only significant difference seems to be that the current pulled when the unit is cold is higher. Regards, Pete Bell On Thu, Jan 19, 2012 at 8:19 AM, paul swed wrote: > I think it is important. The specs say 15-18V. > So I would not drop below the spec. Though interestingly pretty much > everything inside the system is using switching supplies so perhaps there > is more room. > The gtood thing about the switchers is that as the input V goes up current > should go down if that helps you. > Regards > Paul. > > On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson > wrote: > >> I used a variable voltage bench supply to experiment. tried low >> voltage like you are seeing on my FE5680 and I never got a lock. The >> FE5680A spec sheet says 15 to 18 volts and I think you can get buy >> with 14.5V. i tried 12.5 and got "nothing" >> >> I did not test to find the "breaking point" But 1/2 volt low was OK >> and 2.5V low was not ok. >> >> What I bought is a 15V open frame supply from allelectronics.com for >> $11.50. It turned out to be a very high quality power supply (Digikey >> has the same unit for almost $40) This PS does not drop volts even >> with the line input and load well out of spec (I tested 63VAC input >> to a 4A load briefly) I added an RF "hash" filter "just because I >> could" and then an LM7805 and I think I'm OK. >> >> I thought about making a linear supply for the cleanest power but i >> intend to run this 24x7 and don't like wasting so much power. >> >> This is the one I bought >> >> http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html >> >> >> On Wed, Jan 18, 2012 at 3:05 PM, Paul F. Sehorne wrote: >> > How important is the 15vdc at the initial startup 2amp, and then how >> > important at the .7 amp settled rate? >> > >> > I just received two of these >> > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 >> > >> > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and >> > with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts >> with >> > a 5 amp load). Supposedly rated at 6 amps. I have only checked one, >> have >> > not broken the packaging on the second one assuming its performance will >> be >> > similar. >> > >> > Will this be a problem? >> > >> > Paul >> > >> > ___ >> > 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 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] 15 volt power supply for FE-5680A on eBay
One of the regulators (the one that runs the lamp and lamp heater) is running at 13.8V and has a 500mV dropout voltage, so there is very little (~ 700mV) headroom. The one that runs the cell heater is about a volt lower and the one that runs the analog circuits is set to 8.8V, so has plenty of headroom. I suspect the lamp regulator is mostly there to reduce the start-up current, though - the FE-5650 has a very similar lamp circuit with no regulator and the only significant difference seems to be that the current pulled when the unit is cold is higher. Regards, Pete Bell On Thu, Jan 19, 2012 at 8:19 AM, paul swed wrote: > I think it is important. The specs say 15-18V. > So I would not drop below the spec. Though interestingly pretty much > everything inside the system is using switching supplies so perhaps there > is more room. > The gtood thing about the switchers is that as the input V goes up current > should go down if that helps you. > Regards > Paul. > > On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson > wrote: > >> I used a variable voltage bench supply to experiment. tried low >> voltage like you are seeing on my FE5680 and I never got a lock. The >> FE5680A spec sheet says 15 to 18 volts and I think you can get buy >> with 14.5V. i tried 12.5 and got "nothing" >> >> I did not test to find the "breaking point" But 1/2 volt low was OK >> and 2.5V low was not ok. >> >> What I bought is a 15V open frame supply from allelectronics.com for >> $11.50. It turned out to be a very high quality power supply (Digikey >> has the same unit for almost $40) This PS does not drop volts even >> with the line input and load well out of spec (I tested 63VAC input >> to a 4A load briefly) I added an RF "hash" filter "just because I >> could" and then an LM7805 and I think I'm OK. >> >> I thought about making a linear supply for the cleanest power but i >> intend to run this 24x7 and don't like wasting so much power. >> >> This is the one I bought >> >> http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html >> >> >> On Wed, Jan 18, 2012 at 3:05 PM, Paul F. Sehorne wrote: >> > How important is the 15vdc at the initial startup 2amp, and then how >> > important at the .7 amp settled rate? >> > >> > I just received two of these >> > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 >> > >> > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and >> > with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts >> with >> > a 5 amp load). Supposedly rated at 6 amps. I have only checked one, >> have >> > not broken the packaging on the second one assuming its performance will >> be >> > similar. >> > >> > Will this be a problem? >> > >> > Paul >> > >> > ___ >> > 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 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] 15 volt power supply for FE-5680A on eBay
I think it is important. The specs say 15-18V. So I would not drop below the spec. Though interestingly pretty much everything inside the system is using switching supplies so perhaps there is more room. The gtood thing about the switchers is that as the input V goes up current should go down if that helps you. Regards Paul. On Wed, Jan 18, 2012 at 6:25 PM, Chris Albertson wrote: > I used a variable voltage bench supply to experiment. tried low > voltage like you are seeing on my FE5680 and I never got a lock. The > FE5680A spec sheet says 15 to 18 volts and I think you can get buy > with 14.5V. i tried 12.5 and got "nothing" > > I did not test to find the "breaking point" But 1/2 volt low was OK > and 2.5V low was not ok. > > What I bought is a 15V open frame supply from allelectronics.com for > $11.50. It turned out to be a very high quality power supply (Digikey > has the same unit for almost $40) This PS does not drop volts even > with the line input and load well out of spec (I tested 63VAC input > to a 4A load briefly) I added an RF "hash" filter "just because I > could" and then an LM7805 and I think I'm OK. > > I thought about making a linear supply for the cleanest power but i > intend to run this 24x7 and don't like wasting so much power. > > This is the one I bought > > http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html > > > On Wed, Jan 18, 2012 at 3:05 PM, Paul F. Sehorne wrote: > > How important is the 15vdc at the initial startup 2amp, and then how > > important at the .7 amp settled rate? > > > > I just received two of these > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 > > > > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and > > with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts > with > > a 5 amp load). Supposedly rated at 6 amps. I have only checked one, > have > > not broken the packaging on the second one assuming its performance will > be > > similar. > > > > Will this be a problem? > > > > Paul > > > > ___ > > 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.
Re: [time-nuts] 15 volt power supply for FE-5680A on eBay
Hi I think you would want something with better regulation to really get the Rb to perform well. Bob On Jan 18, 2012, at 6:05 PM, "Paul F. Sehorne" wrote: > How important is the 15vdc at the initial startup 2amp, and then how > important at the .7 amp settled rate? > > I just received two of these > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 > > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and with > 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts with a 5 > amp load). Supposedly rated at 6 amps. I have only checked one, have not > broken the packaging on the second one assuming its performance will be > similar. > > Will this be a problem? > > Paul > > ___ > 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] 15 volt power supply for FE-5680A on eBay
I used a variable voltage bench supply to experiment. tried low voltage like you are seeing on my FE5680 and I never got a lock. The FE5680A spec sheet says 15 to 18 volts and I think you can get buy with 14.5V. i tried 12.5 and got "nothing" I did not test to find the "breaking point" But 1/2 volt low was OK and 2.5V low was not ok. What I bought is a 15V open frame supply from allelectronics.com for $11.50. It turned out to be a very high quality power supply (Digikey has the same unit for almost $40) This PS does not drop volts even with the line input and load well out of spec (I tested 63VAC input to a 4A load briefly) I added an RF "hash" filter "just because I could" and then an LM7805 and I think I'm OK. I thought about making a linear supply for the cleanest power but i intend to run this 24x7 and don't like wasting so much power. This is the one I bought http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html On Wed, Jan 18, 2012 at 3:05 PM, Paul F. Sehorne wrote: > How important is the 15vdc at the initial startup 2amp, and then how > important at the .7 amp settled rate? > > I just received two of these > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 > > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and > with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts with > a 5 amp load). Supposedly rated at 6 amps. I have only checked one, have > not broken the packaging on the second one assuming its performance will be > similar. > > Will this be a problem? > > Paul > > ___ > 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] 15 volt power supply for FE-5680A on eBay
How important is the 15vdc at the initial startup 2amp, and then how important at the .7 amp settled rate? I just received two of these http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts with a 5 amp load). Supposedly rated at 6 amps. I have only checked one, have not broken the packaging on the second one assuming its performance will be similar. Will this be a problem? Paul ___ 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.
