Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...
On 07/06/2013 07:55 AM, Adrian wrote: > Mark, > > I wouldn't replace a 20V cap with an only 10V rated one, especially when the > nominal working voltage is alrady 10V. That would be a very bad idea. > You can always use caps with higher voltage ratings as replacements which is > good for reliability, but don't do the other way. > > The exotic values HP was using (17.000 uF) are probably near impossible to > find, except old stock (not so great with electrolytics) or you go to a > manufacturer and get them custom made. There are several on ebay.com. Search for "17,000 ufd." Sprague 17,000 ufd at 20 Volts, CD 17,000 ufd at 30 Volts, etc. -- Bob Smither, PhD Circuit Concepts, Inc. = No man's life, liberty, or property are safe while the legislature is in session. --Mark Twain (1866) = smit...@c-c-i.com http://www.C-C-I.Com 281-331-2744(office) -4616(fax) <>___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Yes that is true in Australia, but one has to prove that it is the utility companies fault. The main problem is we are right across the street for the main transformer for the area. So, the start of the 240V run for the whole neighbourhood basically. Our switchbox meter has a voltage function that I checked this morning, the voltage is ~255-258V on all 3 phases. I will give a call to power Co stating this is not no, but I don't like my chances. Boo.. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ed Palmer Sent: Sunday, 7 July 2013 9:29 AM To: time-nuts@febo.com Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k Check with your power company. They may be able to switch taps on the transformer to reduce the voltage. I don't know what the situation is for you, but in some places power companies can be forced to repair/replace equipment that they fry due to faults in their system. Ed On 7/6/2013 5:14 PM, Mark C. Stephens wrote: > I just checked the HP manual, most of the linear equipment is specified: 240V > +5/-10% > So, I am a little over at 258V here ): > I am going to unplug everything until I can get this sorted out. > Can't afford to lose anything more, in both time and spares obtainability. > > > marki > > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Jim Lux > Sent: Sunday, 7 July 2013 8:01 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting > normally, PB LEDS scannning and appears to be reading o/k > > On 7/6/13 2:46 PM, Mark C. Stephens wrote: >> Hopefully HP Voltage "Derated" the Cap as well so it can handle our >> 250V here.. We are across the road from the main transformer for the >> area so the voltage is highest at our place, I checked the meter box >> this morning - it is 255-258V on all 3 phases, no wonder I am having >> problems. >> > > Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the > utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls > out 230V +10% -6% so that's 253 to 216 > > One thing to be wary of is that the utility supplies voltages at, say, 120V > or 240V (in the US), but utilization equipment (motors, for > instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop > in the branch circuit, among other things. ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Check with your power company. They may be able to switch taps on the transformer to reduce the voltage. I don't know what the situation is for you, but in some places power companies can be forced to repair/replace equipment that they fry due to faults in their system. Ed On 7/6/2013 5:14 PM, Mark C. Stephens wrote: I just checked the HP manual, most of the linear equipment is specified: 240V +5/-10% So, I am a little over at 258V here ): I am going to unplug everything until I can get this sorted out. Can't afford to lose anything more, in both time and spares obtainability. marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Lux Sent: Sunday, 7 July 2013 8:01 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k On 7/6/13 2:46 PM, Mark C. Stephens wrote: Hopefully HP Voltage "Derated" the Cap as well so it can handle our 250V here.. We are across the road from the main transformer for the area so the voltage is highest at our place, I checked the meter box this morning - it is 255-258V on all 3 phases, no wonder I am having problems. Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls out 230V +10% -6% so that's 253 to 216 One thing to be wary of is that the utility supplies voltages at, say, 120V or 240V (in the US), but utilization equipment (motors, for instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop in the branch circuit, among other things. ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
I just checked the HP manual, most of the linear equipment is specified: 240V +5/-10% So, I am a little over at 258V here ): I am going to unplug everything until I can get this sorted out. Can't afford to lose anything more, in both time and spares obtainability. marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Lux Sent: Sunday, 7 July 2013 8:01 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k On 7/6/13 2:46 PM, Mark C. Stephens wrote: > Hopefully HP Voltage "Derated" the Cap as well so it can handle our > 250V here.. We are across the road from the main transformer for the > area so the voltage is highest at our place, I checked the meter box > this morning - it is 255-258V on all 3 phases, no wonder I am having > problems. > Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls out 230V +10% -6% so that's 253 to 216 One thing to be wary of is that the utility supplies voltages at, say, 120V or 240V (in the US), but utilization equipment (motors, for instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop in the branch circuit, among other things. ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
On 7/6/13 2:46 PM, Mark C. Stephens wrote: Hopefully HP Voltage "Derated" the Cap as well so it can handle our 250V here.. We are across the road from the main transformer for the area so the voltage is highest at our place, I checked the meter box this morning - it is 255-258V on all 3 phases, no wonder I am having problems. Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls out 230V +10% -6% so that's 253 to 216 One thing to be wary of is that the utility supplies voltages at, say, 120V or 240V (in the US), but utilization equipment (motors, for instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop in the branch circuit, among other things. ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Hopefully HP Voltage "Derated" the Cap as well so it can handle our 250V here.. We are across the road from the main transformer for the area so the voltage is highest at our place, I checked the meter box this morning - it is 255-258V on all 3 phases, no wonder I am having problems. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Orin Eman Sent: Sunday, 7 July 2013 2:12 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k What's the specified tolerance on the 17,000 uF? You probably have quite a range to work within. If you are lucky, they specified something like +80/-20% and the 29,000 uF might be OK (measure it). On Sat, Jul 6, 2013 at 4:18 AM, Mark C. Stephens wrote: > C3 (17000uf @ 10v) is open circuit. > Where am I going to get one of those from. > > I need some advice here, Should I just use modern low ESR solder lug > type soldered directly onto the board? > Or Should I try and locate a screw terminal type Capacitor? > > Obviously, I want to do the best for this timer as I rely on it > tremendously. > > > -marki > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of Mark C. Stephens > Sent: Saturday, 6 July 2013 8:47 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons > selecting normally, PB LEDS scannning and appears to be reading o/k > > Checked the PSU voltages on the PSU card next to the 10811. > The -5.2 is reading -4.2. > Took a look with the scope and instead of a nice flat DC I see a 4V > Peak to Peak spike @ 100Hz. > Trying to track down a service manual. > Any ideas on this one guys, if the Pass tranny was shorted, it would > be a lot more than 4.2V unless the overvoltage Zener is able to sink > all that current... > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of Mark C. Stephens > Sent: Saturday, 6 July 2013 8:18 PM > To: time-nuts@febo.com > Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting > normally, PB LEDS scannning and appears to be reading o/k > > I went to use my 5370B todayt and noticed the LEDS on the display are > slowly sort of pulsing bright one after another. > Also all the push button LEDS are going on and off one by one. > The strangest thing is that it appears to be working o/k via HPIB. > > I don't have extender boards but I do have a signature analyser. > > Could it be something silly like one of the PSU regulator has gone kaput? > Has anyone seen this issue before? > > > -marki > > ___ > 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
What's the specified tolerance on the 17,000 uF? You probably have quite a range to work within. If you are lucky, they specified something like +80/-20% and the 29,000 uF might be OK (measure it). On Sat, Jul 6, 2013 at 4:18 AM, Mark C. Stephens wrote: > C3 (17000uf @ 10v) is open circuit. > Where am I going to get one of those from. > > I need some advice here, Should I just use modern low ESR solder lug type > soldered directly onto the board? > Or Should I try and locate a screw terminal type Capacitor? > > Obviously, I want to do the best for this timer as I rely on it > tremendously. > > > -marki > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Mark C. Stephens > Sent: Saturday, 6 July 2013 8:47 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting > normally, PB LEDS scannning and appears to be reading o/k > > Checked the PSU voltages on the PSU card next to the 10811. > The -5.2 is reading -4.2. > Took a look with the scope and instead of a nice flat DC I see a 4V Peak > to Peak spike @ 100Hz. > Trying to track down a service manual. > Any ideas on this one guys, if the Pass tranny was shorted, it would be a > lot more than 4.2V unless the overvoltage Zener is able to sink all that > current... > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Mark C. Stephens > Sent: Saturday, 6 July 2013 8:18 PM > To: time-nuts@febo.com > Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting > normally, PB LEDS scannning and appears to be reading o/k > > I went to use my 5370B todayt and noticed the LEDS on the display are > slowly sort of pulsing bright one after another. > Also all the push button LEDS are going on and off one by one. > The strangest thing is that it appears to be working o/k via HPIB. > > I don't have extender boards but I do have a signature analyser. > > Could it be something silly like one of the PSU regulator has gone kaput? > Has anyone seen this issue before? > > > -marki > > ___ > 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...
You wouldn't even need a UPS, check Google for mains voltage conditioners. APC's kit, for example, should be available worldwide and they make a range that, here in the UK anyway, starts for under 50 GBP. Regards Nigel GM8PZR In a message dated 06/07/2013 13:26:06 GMT Daylight Time, ma...@non-stop.com.au writes: I reckon, the line voltage here is 250v and the equipment is set for 240V, that extra 10V on the mains is why I am having so much equipment failure. Also the Heat sink on the 5370B got so hot I mounted a 5" fan across it to keep it at a respectable temperature. How can I drop the Mains to 240V, I have a boat load of gear that needs to be powered concurrently. (8566A, 8568B, 3585A, 5335A, 5370B, 8901A, etc, powered on together) we are starting to talk some serious current 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...
Running load might not be quite as bad as you'd expect, switching them all on at exactly the same time would probably cause a nice fat pulse but perhaps that's a bit extreme:-), allowing an adequate margin though is always a good idea. If you could tap into the supply and get an idea of running current that would be a good start, after that it's likely to come down to an appropriate autotransformer, fixed or variable, one of the older style saturable reactance type constant voltage transformers, or perhaps an "online" UPS, sinusoidal to be preferred, that will handle the input voltage and regulate the output. The latter would probably be the best, or easiest anyway, option these day, and assuming it meets your voltage and current needs then the off mains hold up time, unless you do need that too, probably wouldn't be too much of an issue so that could help keep the cost down. Regards Nigel GM8PZR In a message dated 06/07/2013 13:26:06 GMT Daylight Time, ma...@non-stop.com.au writes: I reckon, the line voltage here is 250v and the equipment is set for 240V, that extra 10V on the mains is why I am having so much equipment failure. Also the Heat sink on the 5370B got so hot I mounted a 5" fan across it to keep it at a respectable temperature. How can I drop the Mains to 240V, I have a boat load of gear that needs to be powered concurrently. (8566A, 8568B, 3585A, 5335A, 5370B, 8901A, etc, powered on together) we are starting to talk some serious current 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Most of the Caps I have of that size are around ~1/2 the capacitance but twice the voltage. I'll go check the dumpster (...err garage) for some old gear that's due to be scrapped. I am going hate myself if I have to part mule a probably working 8568A/B for a some sort of PSU cap. Yeah, I see your point about the cap voltage, that hadn't occurred in my electrolytic candidates to me for some reason! I'll take that one on-board definitely :) -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Chuck Harris Sent: Saturday, 6 July 2013 11:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k Mark C. Stephens wrote: > Correct, C3 (17000uf @ 10v) is measuring 39uf :) I have a 29000@10V, > same dimensions, do you think the rectifiers can hack that big fella? Without a blush! Except for the 10V part. (Which I missed on the first post) You have to use a capacitor that is at least 2x the operating voltage, and is also greater than any peak voltages that could occur in the boundary cases, such as the power line being at the scope's rated maximum power line voltage. -Chuck Harris > 1uf is quite a bit more. ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...
Yeah, I was looking at the local suppliers and comparing items. They all seem to stop at 10,000uf for the "normal places". I wonder what CR4 is, It's the -5.2 bridge before C3. I'd better check it too, must be a reason for the second time that caps failed. I suppose I could replace CR4 with a higher rated bridge and replace C3 with the 29,000uf Then I'll have prey to the transformer gods for the 8VAC that supplies CR4 doesn't go open circuit under the strain :) HP had some odd values for things on occasion, but look at what they achieved for 1970-1990... -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Adrian Sent: Saturday, 6 July 2013 10:55 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ... Mark, I wouldn't replace a 20V cap with an only 10V rated one, especially when the nominal working voltage is alrady 10V. That would be a very bad idea. You can always use caps with higher voltage ratings as replacements which is good for reliability, but don't do the other way. The exotic values HP was using (17.000 uF) are probably near impossible to find, except old stock (not so great with electrolytics) or you go to a manufacturer and get them custom made. The closest commonly available standard value is 22.000 uF, voltage rating at least 20V (25...35V would be great). 15.000 uF would work as well if available. For higher reliability you may go for a 105°C model. Don't care too much about the mounting style. For repeated outdoor use and transport you can fix the cap with hot glue and / or binding straps. Otherwise I hope your lab isn't moving and shaking enough for the cap to loosen... ;) Adrian Mark C. Stephens schrieb: > Hi Nigel, > > > The only screw type electro can find is 29000uf@10V. it's the same dimensions. > Should I risk the strain on the rectifiers (another 10Kuf is rather a lot)? > Without this timer I am dead in the water so I need to do the right thing > here... > > That's why I posted on the Agilent group too, I need to be sure that I do the > right thing! > > By the way, the failed electro measures 39uf :) > > I reckon, the line voltage here is 250v and the equipment is set for 240V, > that extra 10V on the mains is why I am having so much equipment failure. > Also the Heat sink on the 5370B got so hot I mounted a 5" fan across it to > keep it at a respectable temperature. > > How can I drop the Mains to 240V, I have a boat load of gear that needs to be > powered concurrently. > (8566A, 8568B, 3585A, 5335A, 5370B, 8901A, etc, powered on together) we are > starting to talk some serious current there. > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of gandal...@aol.com > Sent: Saturday, 6 July 2013 9:37 PM > To: time-nuts@febo.com > Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting > normally, PB ... > > As per my reply to the same question on the HP group, you've identified the > problem so just go for a reasonably close-ish equivalent and replace it! > > Regards > > Nigel > GM8PZR > > > In a message dated 06/07/2013 12:18:44 GMT Daylight Time, > ma...@non-stop.com.au writes: > > C3 (17000uf @ 10v) is open circuit. > Where am I going to get one of those from. > > I need some advice here, Should I just use modern low ESR solder lug type > soldered directly onto the board? > Or Should I try and locate a screw terminal type Capacitor? > > Obviously, I want to do the best for this timer as I rely on it tremendously. > > > -marki > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of Mark C. Stephens > Sent: Saturday, 6 July 2013 8:47 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons > selecting normally, PB LEDS scannning and appears to be reading o/k > > Checked the PSU voltages on the PSU card next to the 10811. > The -5.2 is reading -4.2. > Took a look with the scope and instead of a nice flat DC I see a 4V Peak to > Peak spike @ 100Hz. > Trying to track down a service manual. > Any ideas on this one guys, if the Pass tranny was shorted, it would be a > lot more than 4.2V unless the overvoltage Zener is able to sink all that > current... > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of Mark C. Stephens > Sent: Saturday, 6 Ju
Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Mark C. Stephens wrote: Correct, C3 (17000uf @ 10v) is measuring 39uf :) I have a 29000@10V, same dimensions, do you think the rectifiers can hack that big fella? Without a blush! Except for the 10V part. (Which I missed on the first post) You have to use a capacitor that is at least 2x the operating voltage, and is also greater than any peak voltages that could occur in the boundary cases, such as the power line being at the scope's rated maximum power line voltage. -Chuck Harris 1uf is quite a bit more. ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Mark C. Stephens wrote: Correct, C3 (17000uf @ 10v) is measuring 39uf :) I have a 29000@10V, same dimensions, do you think the rectifiers can hack that big fella? Without a blush! -Chuck Harris 1uf is quite a bit more. ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...
Mark, I wouldn't replace a 20V cap with an only 10V rated one, especially when the nominal working voltage is alrady 10V. That would be a very bad idea. You can always use caps with higher voltage ratings as replacements which is good for reliability, but don't do the other way. The exotic values HP was using (17.000 uF) are probably near impossible to find, except old stock (not so great with electrolytics) or you go to a manufacturer and get them custom made. The closest commonly available standard value is 22.000 uF, voltage rating at least 20V (25...35V would be great). 15.000 uF would work as well if available. For higher reliability you may go for a 105°C model. Don't care too much about the mounting style. For repeated outdoor use and transport you can fix the cap with hot glue and / or binding straps. Otherwise I hope your lab isn't moving and shaking enough for the cap to loosen... ;) Adrian Mark C. Stephens schrieb: Hi Nigel, The only screw type electro can find is 29000uf@10V. it's the same dimensions. Should I risk the strain on the rectifiers (another 10Kuf is rather a lot)? Without this timer I am dead in the water so I need to do the right thing here... That's why I posted on the Agilent group too, I need to be sure that I do the right thing! By the way, the failed electro measures 39uf :) I reckon, the line voltage here is 250v and the equipment is set for 240V, that extra 10V on the mains is why I am having so much equipment failure. Also the Heat sink on the 5370B got so hot I mounted a 5" fan across it to keep it at a respectable temperature. How can I drop the Mains to 240V, I have a boat load of gear that needs to be powered concurrently. (8566A, 8568B, 3585A, 5335A, 5370B, 8901A, etc, powered on together) we are starting to talk some serious current there. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Saturday, 6 July 2013 9:37 PM To: time-nuts@febo.com Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ... As per my reply to the same question on the HP group, you've identified the problem so just go for a reasonably close-ish equivalent and replace it! Regards Nigel GM8PZR In a message dated 06/07/2013 12:18:44 GMT Daylight Time, ma...@non-stop.com.au writes: C3 (17000uf @ 10v) is open circuit. Where am I going to get one of those from. I need some advice here, Should I just use modern low ESR solder lug type soldered directly onto the board? Or Should I try and locate a screw terminal type Capacitor? Obviously, I want to do the best for this timer as I rely on it tremendously. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:47 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k Checked the PSU voltages on the PSU card next to the 10811. The -5.2 is reading -4.2. Took a look with the scope and instead of a nice flat DC I see a 4V Peak to Peak spike @ 100Hz. Trying to track down a service manual. Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot more than 4.2V unless the overvoltage Zener is able to sink all that current... -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:18 PM To: time-nuts@febo.com Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k I went to use my 5370B todayt and noticed the LEDS on the display are slowly sort of pulsing bright one after another. Also all the push button LEDS are going on and off one by one. The strangest thing is that it appears to be working o/k via HPIB. I don't have extender boards but I do have a signature analyser. Could it be something silly like one of the PSU regulator has gone kaput? Has anyone seen this issue before? -marki ___ 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. ___ ti
Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Correct, C3 (17000uf @ 10v) is measuring 39uf :) I have a 29000@10V, same dimensions, do you think the rectifiers can hack that big fella? 1uf is quite a bit more. Out of interest, this cap was replaced before, it is not a blue Sprague or Mallory but a grey Phillips Cap. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Adrian Sent: Saturday, 6 July 2013 9:19 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k sounds quite typical for a dried out electrolytic cap. Look for the unregulated -10V that goes into the regulator circuit. Most likely C3 on the power supply motherboard is dead. Adrian Mark C. Stephens schrieb: > Checked the PSU voltages on the PSU card next to the 10811. > The -5.2 is reading -4.2. > Took a look with the scope and instead of a nice flat DC I see a 4V Peak to > Peak spike @ 100Hz. > Trying to track down a service manual. > Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot > more than 4.2V unless the overvoltage Zener is able to sink all that > current... > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] > On Behalf Of Mark C. Stephens > Sent: Saturday, 6 July 2013 8:18 PM > To: time-nuts@febo.com > Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting > normally, PB LEDS scannning and appears to be reading o/k > > I went to use my 5370B todayt and noticed the LEDS on the display are slowly > sort of pulsing bright one after another. > Also all the push button LEDS are going on and off one by one. > The strangest thing is that it appears to be working o/k via HPIB. > > I don't have extender boards but I do have a signature analyser. > > Could it be something silly like one of the PSU regulator has gone kaput? > Has anyone seen this issue before? > > > -marki > > ___ > 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...
Hi Nigel, The only screw type electro can find is 29000uf@10V. it's the same dimensions. Should I risk the strain on the rectifiers (another 10Kuf is rather a lot)? Without this timer I am dead in the water so I need to do the right thing here... That's why I posted on the Agilent group too, I need to be sure that I do the right thing! By the way, the failed electro measures 39uf :) I reckon, the line voltage here is 250v and the equipment is set for 240V, that extra 10V on the mains is why I am having so much equipment failure. Also the Heat sink on the 5370B got so hot I mounted a 5" fan across it to keep it at a respectable temperature. How can I drop the Mains to 240V, I have a boat load of gear that needs to be powered concurrently. (8566A, 8568B, 3585A, 5335A, 5370B, 8901A, etc, powered on together) we are starting to talk some serious current there. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Saturday, 6 July 2013 9:37 PM To: time-nuts@febo.com Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ... As per my reply to the same question on the HP group, you've identified the problem so just go for a reasonably close-ish equivalent and replace it! Regards Nigel GM8PZR In a message dated 06/07/2013 12:18:44 GMT Daylight Time, ma...@non-stop.com.au writes: C3 (17000uf @ 10v) is open circuit. Where am I going to get one of those from. I need some advice here, Should I just use modern low ESR solder lug type soldered directly onto the board? Or Should I try and locate a screw terminal type Capacitor? Obviously, I want to do the best for this timer as I rely on it tremendously. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:47 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k Checked the PSU voltages on the PSU card next to the 10811. The -5.2 is reading -4.2. Took a look with the scope and instead of a nice flat DC I see a 4V Peak to Peak spike @ 100Hz. Trying to track down a service manual. Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot more than 4.2V unless the overvoltage Zener is able to sink all that current... -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:18 PM To: time-nuts@febo.com Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k I went to use my 5370B todayt and noticed the LEDS on the display are slowly sort of pulsing bright one after another. Also all the push button LEDS are going on and off one by one. The strangest thing is that it appears to be working o/k via HPIB. I don't have extender boards but I do have a signature analyser. Could it be something silly like one of the PSU regulator has gone kaput? Has anyone seen this issue before? -marki ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...
As per my reply to the same question on the HP group, you've identified the problem so just go for a reasonably close-ish equivalent and replace it! Regards Nigel GM8PZR In a message dated 06/07/2013 12:18:44 GMT Daylight Time, ma...@non-stop.com.au writes: C3 (17000uf @ 10v) is open circuit. Where am I going to get one of those from. I need some advice here, Should I just use modern low ESR solder lug type soldered directly onto the board? Or Should I try and locate a screw terminal type Capacitor? Obviously, I want to do the best for this timer as I rely on it tremendously. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:47 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k Checked the PSU voltages on the PSU card next to the 10811. The -5.2 is reading -4.2. Took a look with the scope and instead of a nice flat DC I see a 4V Peak to Peak spike @ 100Hz. Trying to track down a service manual. Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot more than 4.2V unless the overvoltage Zener is able to sink all that current... -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:18 PM To: time-nuts@febo.com Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k I went to use my 5370B todayt and noticed the LEDS on the display are slowly sort of pulsing bright one after another. Also all the push button LEDS are going on and off one by one. The strangest thing is that it appears to be working o/k via HPIB. I don't have extender boards but I do have a signature analyser. Could it be something silly like one of the PSU regulator has gone kaput? Has anyone seen this issue before? -marki ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
sounds quite typical for a dried out electrolytic cap. Look for the unregulated -10V that goes into the regulator circuit. Most likely C3 on the power supply motherboard is dead. Adrian Mark C. Stephens schrieb: Checked the PSU voltages on the PSU card next to the 10811. The -5.2 is reading -4.2. Took a look with the scope and instead of a nice flat DC I see a 4V Peak to Peak spike @ 100Hz. Trying to track down a service manual. Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot more than 4.2V unless the overvoltage Zener is able to sink all that current... -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:18 PM To: time-nuts@febo.com Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k I went to use my 5370B todayt and noticed the LEDS on the display are slowly sort of pulsing bright one after another. Also all the push button LEDS are going on and off one by one. The strangest thing is that it appears to be working o/k via HPIB. I don't have extender boards but I do have a signature analyser. Could it be something silly like one of the PSU regulator has gone kaput? Has anyone seen this issue before? -marki ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Electrolytic capacitors: check them on the PSU, usually they are the first to look for. On Sat, Jul 6, 2013 at 12:46 PM, Mark C. Stephens wrote: > Checked the PSU voltages on the PSU card next to the 10811. > The -5.2 is reading -4.2. > Took a look with the scope and instead of a nice flat DC I see a 4V Peak to > Peak spike @ 100Hz. > Trying to track down a service manual. > Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot > more than 4.2V unless the overvoltage Zener is able to sink all that > current... > > > -marki > > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Mark C. Stephens > Sent: Saturday, 6 July 2013 8:18 PM > To: time-nuts@febo.com > Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting > normally, PB LEDS scannning and appears to be reading o/k > > I went to use my 5370B todayt and noticed the LEDS on the display are slowly > sort of pulsing bright one after another. > Also all the push button LEDS are going on and off one by one. > The strangest thing is that it appears to be working o/k via HPIB. > > I don't have extender boards but I do have a signature analyser. > > Could it be something silly like one of the PSU regulator has gone kaput? > Has anyone seen this issue before? > > > -marki > > ___ > 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
C3 (17000uf @ 10v) is open circuit. Where am I going to get one of those from. I need some advice here, Should I just use modern low ESR solder lug type soldered directly onto the board? Or Should I try and locate a screw terminal type Capacitor? Obviously, I want to do the best for this timer as I rely on it tremendously. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:47 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k Checked the PSU voltages on the PSU card next to the 10811. The -5.2 is reading -4.2. Took a look with the scope and instead of a nice flat DC I see a 4V Peak to Peak spike @ 100Hz. Trying to track down a service manual. Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot more than 4.2V unless the overvoltage Zener is able to sink all that current... -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:18 PM To: time-nuts@febo.com Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k I went to use my 5370B todayt and noticed the LEDS on the display are slowly sort of pulsing bright one after another. Also all the push button LEDS are going on and off one by one. The strangest thing is that it appears to be working o/k via HPIB. I don't have extender boards but I do have a signature analyser. Could it be something silly like one of the PSU regulator has gone kaput? Has anyone seen this issue before? -marki ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Checked the PSU voltages on the PSU card next to the 10811. The -5.2 is reading -4.2. Took a look with the scope and instead of a nice flat DC I see a 4V Peak to Peak spike @ 100Hz. Trying to track down a service manual. Any ideas on this one guys, if the Pass tranny was shorted, it would be a lot more than 4.2V unless the overvoltage Zener is able to sink all that current... -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Saturday, 6 July 2013 8:18 PM To: time-nuts@febo.com Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k I went to use my 5370B todayt and noticed the LEDS on the display are slowly sort of pulsing bright one after another. Also all the push button LEDS are going on and off one by one. The strangest thing is that it appears to be working o/k via HPIB. I don't have extender boards but I do have a signature analyser. Could it be something silly like one of the PSU regulator has gone kaput? Has anyone seen this issue before? -marki ___ 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] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
I went to use my 5370B todayt and noticed the LEDS on the display are slowly sort of pulsing bright one after another. Also all the push button LEDS are going on and off one by one. The strangest thing is that it appears to be working o/k via HPIB. I don't have extender boards but I do have a signature analyser. Could it be something silly like one of the PSU regulator has gone kaput? Has anyone seen this issue before? -marki ___ 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.
