Vintage HP power cords needed.
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From: James Sweet on 15 Jun 2007 22:26 "Shawn D'Alimonte" <shawnd(a)mycybernet.net> wrote in message news:qPHci.50564$dC2.7793(a)newsfe13.lga... > JW wrote: >> I am looking for some vintage AC power cords for older HP test equipment. >> I have a number of pieces of test equipment, and only one power cord. The >> only marking on it is "Electricord". It is a three conductor cord that >> uses three round female sockets on the end that terminates at the >> equipment > > This probably isn't up to code, but for my function generator I cut the > end off another cord and crimped yellow (12ga?) but splices to it. > Slightly crimping the other end made a socket that nicely fits the pins. > > Looks ugly, but works. I've done something similar but filled in the space with hot glue to mold a connector. If you wax or otherwise lubricate the socket, the hot glue won't stick to it and you can use the socket itself to mold the shape of the plug. A better option may be to retrofit the equipment with standard IEC power sockets which can be salvaged from junk computer equipment.
From: Mark Zenier on 15 Jun 2007 14:34 In article <e1p4735r8j48l8gibsnl1039inmed71ch8(a)4ax.com>, JW <none(a)dev.nul> wrote: >I am looking for some vintage AC power cords for older HP test equipment. >I have a number of pieces of test equipment, and only one power cord. The >only marking on it is "Electricord". It is a three conductor cord that >uses three round female sockets on the end that terminates at the >equipment, and is similar to the old power cords that were found on coffee >pots and such (but with one more pin in the center offset from the other >two - a ground, I suppose). I believe it is typical of HP equipment made >in the 1960's to have these, such as the HP745A AC calibrator, among >others. Does anyone know where I might find some of these, or perhaps know >what the original HP part # is? (I know that I could hard-wire a standard >line cord to these units, but would much rather have the proper cords.) There was a discussion here (sci.electronics.equipment) several years ago that included the Belden part numbers. Looks like I saved it. Here's the highpoints (minus the flamewar). >From: Jim Adney <jadney(a)vwtype3.org> >Newsgroups: sci.electronics.equipment,misc.industry.electronics.marketplace,rec.radio.swap >Subject: Re: "Old" HP Power cords = Belden 17280 >Date: Mon, 05 Mar 2001 23:07:29 -0600 >Message-ID: <6oq8atgo45s5h6kian42a6ngpa7uf6ot8r(a)4ax.com> >References: <3A96A4D4.599A3B44(a)arrl.net> >"L. Mark PIlant" <n1vqw(a)arrl.net> wrote: >>I've been seeing a fair number of these power cords being offered >>as being *rare*. They ARE NOT rare. >> >>These are still being made. They are listed in the current Newark >>Electronics and Allied Electronics catalogs. If you look for a >>Belden 17280 cord you will find them. They are about USD $5.00 new! >>BTW, They may actually be under the Volex name, since Belden sold >>the manufacturing to them a bit back. >I seem to recall going thru this 15-20 years ago. At that time I >checked the Belden catalog and discovered that there were TWO >DIFFERENT types of these. They differed in the way that the oval end >was wired. >The standard way has the ground on the center pin, but the old HP (and >Harrison Labs) equipment used a non-standard configuration that put >the ground on one side. >This left me with a quandry. Should I buy standard ones and rewire the >HP gear to be standard with the thought that it was less likely that >someone might come up with the correct, but uncommon, cord and make >the chassis live. Or should I buy the right cord and take a chance >that that cord might migrate to a more conventional piece of >equipement and make IT live? >In the end, I bought the conventional versions and rewired the 3 >pieces of HP gear that we had. >That was easy, but in retrospect installing the newer style of power >entry module would have been better, as there would have been no >possible confusion thereafter. >So, does Belden still make both styles, or is someone here just >assuming that since the oval connector looks right it must BE right? >- >----------------------------------------------- > Jim Adney jadney(a)vwtype3.org > Madison,Wisconsin USA >----------------------------------------------- >From: "L. Mark Pilant" <n1vqw(a)arrl.net> >Newsgroups: sci.electronics.equipment,misc.industry.electronics.marketplace,rec.radio.swap >Subject: Re: "Old" HP Power cords = Belden 17280 >Date: Wed, 07 Mar 2001 09:31:38 -0500 >Message-ID: <3AA6464A.9F35642A(a)arrl.net> >References: <3A96A4D4.599A3B44(a)arrl.net> <6oq8atgo45s5h6kian42a6ngpa7uf6ot8r(a)4ax.com> >Jim, Belden/Volex still makes both versions. The 17280 is the >standard version and the 17952 is the one with the swapped line >and neutral. Oh yes, the 17280 is 7.5 feet long, and the 17952 >is 8 feet long. I wonder if the length is different to allow you >to tell which cord you have without having to test it. >- Mark >From: "L. Mark Pilant" <n1vqw(a)arrl.net> >Newsgroups: sci.electronics.equipment,misc.industry.electronics.marketplace,rec.radio.swap >Subject: Re: "Old" HP Power cords = Belden 17280 >Date: Thu, 08 Mar 2001 13:37:54 -0500 >Message-ID: <3AA7D182.E1EA6965(a)arrl.net> >References: <3A96A4D4.599A3B44(a)arrl.net> <6oq8atgo45s5h6kian42a6ngpa7uf6ot8r(a)4ax.com> <3AA6464A.9F35642A(a)arrl.net> <q8vdatcup2t189n61imv060fk596rihh15(a)4ax.com> >> Thanks. At least it was the ground and neutral that were switched, but >> even that could be lethal if swapped. A really bad situation. >Jim, it isn't the ground and neutral which were swapped, but line >(a.k.a., hot) and neutral. (I think this is what you meant. :-) >(You probably already know this Jim, but for those that don't...) >While this may not look like a real big problem because the line >and neutral simply go through a fuse and switch to the transformer, >there is a subtle issue which is potentially lethal. >In this case, the line and neutral are completely isolated from >the grounded case. Where the problem arises is the switch and >fuse are now in the neutral rather than hot line. This means >even after pulling the fuse, much more of the circuitry remains >"live." This is only slightly better if the power switch is used >to break both the hot and neutral. >From the Volex site (http://www.volexpowercords.com/) for the >17280 cord: 'Polarity as mandated by CSA electical (SIC) Bulletin >895B and UL817.' And for the 17952 cord: 'This cord is made with >non-standard polarization and has a cautin (SIC) label applied >to the cord stating this fact: "This cord is for replacement >only and is NOT intended for new original equipment."' >- Mark Mark Zenier mzenier(a)eskimo.com Googleproofaddress(account:mzenier provider:eskimo domain:com)
From: Jamie on 16 Jun 2007 21:41 Mark Zenier wrote: > In article <e1p4735r8j48l8gibsnl1039inmed71ch8(a)4ax.com>, > JW <none(a)dev.nul> wrote: > >>I am looking for some vintage AC power cords for older HP test equipment. >>I have a number of pieces of test equipment, and only one power cord. The >>only marking on it is "Electricord". It is a three conductor cord that >>uses three round female sockets on the end that terminates at the >>equipment, and is similar to the old power cords that were found on coffee >>pots and such (but with one more pin in the center offset from the other >>two - a ground, I suppose). I believe it is typical of HP equipment made >>in the 1960's to have these, such as the HP745A AC calibrator, among >>others. Does anyone know where I might find some of these, or perhaps know >>what the original HP part # is? (I know that I could hard-wire a standard >>line cord to these units, but would much rather have the proper cords.) > > > There was a discussion here (sci.electronics.equipment) several years ago > that included the Belden part numbers. > > Looks like I saved it. Here's the highpoints (minus the flamewar). > > > if you can remember that much here in such detail? It shows signs of CPU addiction. Me, I can't afford to use any brain matter wastefully! :) "I'm never wrong, once i thought i was, but was mistaken" Real Programmers Do things like this. http://webpages.charter.net/jamie_5
From: Mark Zenier on 17 Jun 2007 13:14 In article <%70di.169$Cg7.125(a)newsfe05.lga>, Jamie <jamie_ka1lpa_not_valid_after_ka1lpa_(a)charter.net> wrote: >Mark Zenier wrote: >> >> Looks like I saved it. Here's the highpoints (minus the flamewar). >> > if you can remember that much here in such detail? It shows signs of >CPU addiction. > > Me, I can't afford to use any brain matter wastefully! :) Well, all it takes is an archive of the newsgroup* since it got created and a vague memory of something. And then you "grep for it". It takes a while though, (Google can be faster). *(Proprietary interest, I got the damn thing created in the first place). Mark Zenier mzenier(a)eskimo.com Googleproofaddress(account:mzenier provider:eskimo domain:com)
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