Re: Meaning of red sticker on equipment
On Sun, 13 Jun 2021 at 20:19, Roy Thistle < roy.thistle@...> wrote: On Fri, Jun 11, 2021 at 12:03 PM, cheater cheater wrote:
This answer will be as good as any other you'll get to this question by the way
Well a lot of us know... even though we don't know who started it... what I call the "traffic light" system.... means that...
Green: Good to go. (At worst uncal... but cert lab stickers will show that.) Hardly ever ends up in the hands of PayBay sellers. Hardly ever sells if it does.?
Yellow: Go with caution. Unit has issues... service contractor assures "can be fixed" ... but bill engenders abandonment. Ends up in the hands of PayBay sellers after it's auctioned off.?
Red: Not good to go.. unless straight to the bin. Ends up on PayBay after BoobTubers encourage industrial park dumpster diving.... or industrial bottom feeders see a green unit on PayBay
I can see there might be some correlation between bad items and red stickers, but coloured stickers could be used to mean many things. The coaxial shorts for my 3;5 mm cal kit are covered in red nail varnish. There's nothing wrong with them, but I know if I see them on the bench, that:
red=short? (short circuits are dangerous, so make them red)
black=load (the load is like a black hole, absorbing everything)
green=open (since I needed another colour, and it happened to be green)
So red, green or black, has absolutely nothing to do with the condition, but is a way for me to locate the correct part quickly, which is otherwise difficult as the text on them is so small.?
In the MOD where I used to work, connectors were painted different colours depending on who owned them.
However, the original poster said the item had fingers missing, although he was not too bothered about them, as I think he had another part. For that, I would say there is a case for asking for a reduction, if an item is sold as "good condition", but has fingers missing. At the end of the day, what is important is whether the item purchased meets the description. It needs testing - not guesswork.
Dave
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Re: Meaning of red sticker on equipment
On Fri, Jun 11, 2021 at 12:03 PM, cheater cheater wrote:
This answer will be as good as any other you'll get to this question by the way
Well a lot of us know... even though we don't know who started it... what I call the "traffic light" system.... means that... Green: Good to go. (At worst uncal... but cert lab stickers will show that.) Hardly ever ends up in the hands of PayBay sellers. Hardly ever sells if it does.? Yellow: Go with caution. Unit has issues... service contractor assures "can be fixed" ... but bill engenders abandonment. Ends up in the hands of PayBay sellers after it's auctioned off.? Red: Not good to go.. unless straight to the bin. Ends up on PayBay after BoobTubers encourage industrial park dumpster diving.... or industrial bottom feeders see a green unit on PayBay
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Re: Meaning of red sticker on equipment
On 6/13/21 2:59 PM, Roy Thistle wrote: Green? ??Powers up and All OK
Red: came from a dumpster... dragged it home behind the truck... and now
hoping to appear honest... yet also hoping any buyers are oblivious...
cause I'm? put'n it on PayBay.
Yellow: didn't know it came from a dumpster... but the auction guy says
it powers up... and can "definitely" be fixed... definitely charging a
lot for that on PayBay
Green: got no clue how it works... but lots? of blinkinlitzen... so it
must work!... definitely going charge an outrageously greedy price on
PayBay for that... and pray some sucker buys it. Red = Chris Daniel Orange = Doug Humphrey Blue = Dave McGuire Green = "other" That was the sticker scheme for ownership of hardware that we all stored in Doug Humphrey's warehouse for a few years. Color-coded stickers have a meaning to the stickerer, nothing more. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Meaning of red sticker on equipment
On Fri, Jun 11, 2021 at 01:40 PM, Paul Bicknell wrote:
Green? ??Powers up and All OK
Red: came from a dumpster... dragged it home behind the truck... and now hoping to appear honest... yet also hoping any buyers are oblivious... cause I'm? put'n it on PayBay. Yellow: didn't know it came from a dumpster... but the auction guy says it powers up... and can "definitely" be fixed... definitely charging a lot for that on PayBay Green: got no clue how it works... but lots? of blinkinlitzen... so it must work!... definitely going charge an outrageously greedy price on PayBay for that... and pray some sucker buys it.
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I am adjusting a 1790A. The MAIN TIME/DIV. knob will not move into the 2 ms position. Does anyone know how to adjust and/or correct this. My operating and service manual dated August 1976 does not address this problem. I would appreciate hearing from anyone who has experience working with this model.
Thanks
Joe
KW4YW
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Re: Need info on TO-3 transistor insulator
OK. FWIW did I design drivers for old stepper motors about 10 years ago. They are unipolar and the mosfets need to absorb an dissipate the kickback. We used Keratherm RED and silicone grease and used high-strength M3 insex bolts that were tightened using a torque wrench to manufacturer's specs. The unit is still running...
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Not being able to upload and download from Groups.io site
Hi All ? Just a bit of information I am using windows 7 and during the past week I have hade windows updates Problem is the update prevented me from using various functions on Groups IO ? The fix was easy? I did a search for windows Edge windows 7 is still supported So installed it? all went OK After installation It asked me if I wanted Edge to be the prime internet ? I ticked yes and like magic all the desk top links changed and everything now works ? A good news story regards Paul
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Re: Need info on TO-3 transistor insulator
I checked in my 2007 Aavid Thermalloy catalog and there are no hard-anodized insulators of any kind.? They have other 4000-series interface stuff but not 4700's.
What are you?up to?? From my experience in thermal?mounting operations, I'm going to guess that your losses (for any reasonable thickness of aluminum interface slab) are going to be 1) dominated by the two 'shim' layers needed, and 2) then a strong function of whatever you have these transistors mounted to.? An?eighth?of an inch of aluminum is nearly transparent to heat (for TO3-levels of heat) and four thou of oxide is not going to be a huge deal either.? The subtleties of how exactly you bolt the transistor down, and the surface finish of the materials will also be more relevant?than the aluminum.
I'm going crazy here. I've got a bunch of these high thermal conductivity hard-anodized aluminum TO-3 transistor mounting insulators salvaged from old gear, and planning to use some. I figured I'd check the thermal conductivity specs on line, and be done. I quickly found they are likely Thermalloy brand type 4703A, 4720A, or 4726A (same deal but slightly different outline sizes), with drawings and such, but no thermal specs. I can't seem to find any specs for these anywhere, just lots of pictures and references and ones for sale, but no useful info. Thermalloy apparently disappeared into a conglomeration some time ago. There's stuff floating around, but somehow it escapes me - maybe a mental block or 24 hour insanity. I even found the alumina types and specs, but no anodized. Somebody must still use and make these things. Or maybe all old/obsolete package stuff has disappeared for some reason.You'd think at least the old data sheets would be out there. The only outfits I recall from the old days are Thermalloy and Wakefield, and can't seem to spot anything useful on the later either. I just downloaded a recent Wakefield-Vette (now called) catalog, and they seem to be almost entirely about heatsinks and greases, and no hardware except some Kapton insulators.
Anyway, does anyone have this sort of info, maybe in old catalogs, or know where to look? All I need is the thermal resistance in simplest form deg C/W in TO-3 configuration.
Ed
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Re: Need info on TO-3 transistor insulator
Re the hard anodized thermal interfaces.
We use dozens if not 100's of the things, for stud mounted 50 and 75W
Zenner diodes, with anything up to 400V across them, and they are run
right up to the envelope of their ratings, at up to 90'C!?? (The "heat
sink" is part of an oil cooled power amp, where the "coolant" can run at
that sort of temperature for hours on end..
The *Only* time there has been issues, is if when assembling it all,
there is dirt on something, that damages the anodising.?? Else, no
problems whatsoever.
Personally, when I assemble them, I use a 500V "Mega" to check the
resulting insulation.?? Anything that moves the needle, I dismantle,
clean and re-assemble with fresh compound.?? If it's still an issue, I
replace the interface washer.?? Often, when later examining them, there
is more often than not, a "light" patch somewhere, due to past
deformation and resulting wear of the anodised coating..
For the money, they do appear to have the best thermal vs cost
performance of all options (other than direct mounting.)
But, as in all things.? Care is needed in the installation and assembly
of such things.?? The only time I've seen insulation failures, has been
due to dirt, or undue movement during assembly (rotation of the stud
mount device, damaging the coating.)?? That would be "difficult" to do
with TO3 devices!
Yes, we use a smear of heatsink compound, and I mean a smear, no more,
on both sides of the anodised washer.
We have more trouble with the dry "SilPads" used for some large single
hole power FET's used in HV shunt regulators, they seem to fail at
random all the time.?? And yes, we religiously torque all such fittings,
as per manufacturers spec's.
All the best.
Dave G8KBV
--
Created on and sent from a Unix like PC running and using free and open source software:
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Re: Service manuals needed
The HPJ from juni 1980 has an article about the 3850 which is from the same family. If I¡¯m correct the stations used the? calculator chip from the HP45. ? -Rik ?
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Van: [email protected] < [email protected]> Namens ChrisBeee via groups.io Verzonden: zaterdag 12 juni 2021 08:45 Aan: [email protected]Onderwerp: Re: [HP-Agilent-Keysight-equipment] Service manuals needed ? Gordon,
I would chime in praising these instruments, also having one of these beautifully constructed 3810 Total Stations. Brought it over from the US many years ago in my hand luggage =D, hoping to be able to fix it some day, but searching for a service manual ever since. Mine has no laser beam output, for whatever reason, but everything else works. This thingy does not seem to be very complicated, but way too complicated to be able to successfully poking around...
Chris
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Re: HP 8558B spectrum analyzer plug-in rotary switch
None of mine had beryllium copper fingers. They are 10thou stainless steel.
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Re: Service manuals needed
Gordon,
I would chime in praising these instruments, also having one of these beautifully constructed 3810 Total Stations. Brought it over from the US many years ago in my hand luggage =D, hoping to be able to fix it some day, but searching for a service manual ever since. Mine has no laser beam output, for whatever reason, but everything else works. This thingy does not seem to be very complicated, but way too complicated to be able to successfully poking around...
Chris
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Re: HP83620 Series generators
I have a couple of synthesizers in this series that need work. Is there anyone who repairs these out there?
Thanks, Jeff Kruth
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Re: HP 70000 Service Manuals Wanted
I think I sent all of these to Artek at one time to scan and make available to everyone.? I have most, if not all of the 70K CLIPs
Richard Parrish
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Hi Mike
?
Thank you for coming back talk to you next week
?
Regards Paul
?
From: [email protected] [mailto:[email protected]]
On Behalf Of Mike Vande Voort
Sent: 11 June 2021 20:44
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 70000 Service Manuals Wanted
?
I bought this system several years ago and the service manuals were supposed to be on? CDs I received with the system,
I'll try and dig them out this weekend.
?
On Fri, Jun 11, 2021, 2:40 PM Paul Bicknell <paul@...> wrote:
Dear All
?
For those that have or have worked with HP 70000 equipment
?
Can any of you please help with the following Service Manuals??
?
This is a grate shame as the CLIPS are available
?
We just want to get them scanned and you retain the original
?
HP????? 70205A, 6A ????????????? Service Manual
?????? Part No?????????? ?
HP????? 70300A????????????????????? Service Manual
?????? Part No?????????? 70300-90090
HP????? 70340A????????????????????? Service Manual
?????? Part No?????????? 70340-90007
HP ???? 70905A,B, 6A,B???????
Service Manual ?????? Part No?????????? ?
?
Also looking for other HP 70000 Manuals?? and? CLIPS
?
Best Regards? Paul??? The Librarian for this site
?
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Re: HP 70000 Service Manuals Wanted
Hi Mike ? Thank you for coming back talk to you next week ? Regards Paul ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Mike Vande Voort
Sent: 11 June 2021 20:44
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 70000 Service Manuals Wanted ? I bought this system several years ago and the service manuals were supposed to be on? CDs I received with the system, I'll try and dig them out this weekend. ? On Fri, Jun 11, 2021, 2:40 PM Paul Bicknell <paul@...> wrote: Dear All ? For those that have or have worked with HP 70000 equipment ? Can any of you please help with the following Service Manuals?? ? This is a grate shame as the CLIPS are available ? We just want to get them scanned and you retain the original ? HP????? 70205A, 6A ????????????? Service Manual ?????? Part No?????????? ? HP????? 70300A????????????????????? Service Manual ?????? Part No?????????? 70300-90090 HP????? 70340A????????????????????? Service Manual ?????? Part No?????????? 70340-90007 HP ???? 70905A,B, 6A,B??????? Service Manual ?????? Part No?????????? ? ? Also looking for other HP 70000 Manuals?? and? CLIPS ? Best Regards? Paul??? The Librarian for this site ?
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Re: HP 8558B spectrum analyzer plug-in rotary switch
Back in March of 2012, we had a prolonged discussion about the fingers.? Jeff Pinsky had found some stock that was the correct size.? It was even BeCu, I think.? I don't have a copy of the post where he said where he had gotten it, but the spacing and length are available.? You just can't get them cut to the right length and drilled for you.
On Friday, June 11, 2021, 2:44:37 PM CDT, jonathan8013 via groups.io <g4mdc@...> wrote:
The screws are the way to go.?
Sometimes you can find the contacts down in the box and sometimes you can't. I had an 8559 and an 8558 with not enough contacts to go around.
I fixed the 8559 first with the contacts I had, attached using 13BA (M1) screws.??
After that the 8558 switches were quite a few contacts short. I made an extra 9 pcs by milling them.
I don't think there is any off the shelf finger stock that will do it.?
It did cost a bit to do.
Micro milling machine
0.4mm drills?
0.4mm milling cutters
1.2mm drills
Now they both work and I'm a happy man.? HP8640B? contacts?are not the same. I might like to try making some of those? someday.
The flat machining work is quite easy. The ~45degree bend is not hard. Forming the rounded ends on the fingers??Who knows how to do that easily? I used small pliers but it isn't the best...??
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Re: Meaning of red sticker on equipment
Hi ? I use strikers to determine equipment status ?so ? Red???????? Does not power up Amber ??Powers up but has issues Green? ??Powers up and All OK ? This helps when you want to grab equipment to do a job ? Regards Paul ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Mike Feher
Sent: 11 June 2021 21:25
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Meaning of red sticker on equipment? As I said previously, I think it was placed on there by the seller. If it is a dealer, it is probably an indication for them that it was sold and for the shipping department an OK to ship. 73 ¨C Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ? ? On Fri, Jun 11, 2021 at 09:46 AM, Bruce wrote: Seems like the best way to find problems would be to test it (assuming
you have the triaxial cables).
One additional thought on the red sticker - could be an inventory
artifact. I've bought stuff at aerospace auctions and noticed that
many of the items had red stickers on them - the accompanying tags
often said something like surplus item from ..... project (or similar
comments).
Unfortunately I neither have the triaxial cables yet nor the 4145A, otherwise I would have done exactly that.
As to the red sticker. It wasn't in the listing so it must have been added by the seller, or the seller sent me a different unit than the one listed. I'm inclined to believe it's the former, because the unit looks similar enough to what was presented in the listing.
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Re: Meaning of red sticker on equipment
As I said previously, I think it was placed on there by the seller. If it is a dealer, it is probably an indication for them that it was sold and for the shipping department an OK to ship. 73 ¨C Mike ? Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 ?
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From: [email protected] < [email protected]> On Behalf Of Matt Huszagh Sent: Friday, June 11, 2021 12:52 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] Meaning of red sticker on equipment ? On Fri, Jun 11, 2021 at 09:46 AM, Bruce wrote: Seems like the best way to find problems would be to test it (assuming
you have the triaxial cables).
One additional thought on the red sticker - could be an inventory
artifact. I've bought stuff at aerospace auctions and noticed that
many of the items had red stickers on them - the accompanying tags
often said something like surplus item from ..... project (or similar
comments).
Unfortunately I neither have the triaxial cables yet nor the 4145A, otherwise I would have done exactly that.
As to the red sticker. It wasn't in the listing so it must have been added by the seller, or the seller sent me a different unit than the one listed. I'm inclined to believe it's the former, because the unit looks similar enough to what was presented in the listing.
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Re: HP 8558B spectrum analyzer plug-in rotary switch
The screws are the way to go.?
Sometimes you can find the contacts down in the box and sometimes you can't. I had an 8559 and an 8558 with not enough contacts to go around.
I fixed the 8559 first with the contacts I had, attached using 13BA (M1) screws.??
After that the 8558 switches were quite a few contacts short. I made an extra 9 pcs by milling them.
I don't think there is any off the shelf finger stock that will do it.?
It did cost a bit to do.
Micro milling machine
0.4mm drills?
0.4mm milling cutters
1.2mm drills
Now they both work and I'm a happy man.? HP8640B? contacts?are not the same. I might like to try making some of those? someday.
The flat machining work is quite easy. The ~45degree bend is not hard. Forming the rounded ends on the fingers??Who knows how to do that easily? I used small pliers but it isn't the best...??
|
Re: HP 70000 Service Manuals Wanted
I bought this system several years ago and the service manuals were supposed to be on? CDs I received with the system, I'll try and dig them out this weekend.
On Fri, Jun 11, 2021, 2:40 PM Paul Bicknell < paul@...> wrote: Dear All ? For those that have or have worked with HP 70000 equipment ? Can any of you please help with the following Service Manuals?? ? This is a grate shame as the CLIPS are available ? We just want to get them scanned and you retain the original ? HP????? 70205A, 6A ????????????? Service Manual ?????? Part No?????????? ? HP????? 70300A????????????????????? Service Manual ?????? Part No?????????? 70300-90090 HP????? 70340A????????????????????? Service Manual ?????? Part No?????????? 70340-90007 HP ???? 70905A,B, 6A,B??????? Service Manual ?????? Part No?????????? ? ? Also looking for other HP 70000 Manuals?? and? CLIPS ? Best Regards? Paul??? The Librarian for this site ?
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Dr. David Kirkby, Kirkby Microwave Ltd
Dave McGuire
Anders
Paul Bicknell
Rik Bos
Mike Vande Voort