Re: Repair of HP Logic Clips
Neat project!? Well done.
If it were me, I'd release the board design and BoM* under a creative commons license and let others in on the act for personal use.? Profit doesn't have to enter into everything.? It'll be impossible to keep something like that "secret" anyway.
(* based on DigiKey / Mouser part numbers perhaps, with generic reference too, as they are largely universal world wide.)
The most expensive parts for most people (who are not conversant with ordering PCB's from a board shop) will be the two PCB's
Perhaps the only way to make a shekel on it, would be to order a batch of boards, and sell pairs them with the documentation.?? (eBay sell for free these days, at least hear in the UK, if you believe the ad's on TV.)
Regards.
Dave B (UK)
--
Created on and sent from a Unix like PC running and using open source software:
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Re: Repair of HP Logic Clips
If he were instead to sell it, He may find the market really too small to be worthwhile. Probably no profit motive here otherwise.
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Re: Repair of HP Logic Clips
On 11/5/24 12:51, Hans Eriksen via groups.io wrote: Well - as I wrote I didn't put pads on my layout for the 2 interconnections, but I did mount 2 wire between the boards
Any of the 16 pins can provide power and ground
The reason for not putting on these pads (and the capacitor) was because I didn't wanted to make the PCB any bigger than the clip itself
The wire are mounted of the pins of the components, same as small cap, 22nF 0402 on both boards If you are so inclined, I think it would be great for you to release the design, perhaps in the files section here. I have an original HP Logic Clip, but I would like to construct a few of your implementation, as people at the museum keep needing to borrow mine and I don't want it to get lost over there. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Repair of HP Logic Clips
Well - as I wrote I didn't put pads on my layout for the 2 interconnections, but I did mount 2 wire between the boards
Any of the 16 pins can provide power and ground
?
The reason for not putting on these pads (and the capacitor) was because I didn't wanted to make the PCB any bigger than the clip itself
The wire are mounted of the pins of the components, same as small cap, 22nF 0402 on both boards
?
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Re: Repair of HP Logic Clips
As one who repaired a few logic clips back in the day it looks like the DIY approach above missed something HP did, which was to interconnect the Vcc and local ground busses across both sides of the logic clip. IIRC HP used differently marked 20-pin IC packages in their logic clip so that just bending the end pins (and soldering them) across sides provided that interconnection. The ICs were mounted solid, only the contact wires flexed.??
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Re: Repair of HP Logic Clips
I made me own Logic Clip (I really wanted a HP one, but they are very expensive now)
?
Just made 2 (equal) boards with
8 x dual diodes, for tapping off power and ground
8 x LED and a resistor (rect. 3 x 2 mm)
8 x Logic Level MOSFET with gate protection
the board also have 8 x pads for attaching to the clip and 2 x 8 pads for the LED's
I didn't included the capacitor in my layout, nor some pads for the connection wire between the 2 boards (power and ground)
Schematic and layout done in Diptrace, if anyone is interested
?
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Re: Added Folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index
#file-notice
Some groups features are a bit baffling
?
Hopefully the scanned content is of use to people?
?
Peter
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Re: Added Folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index
#file-notice
Mea culpa.. :-)
Barry - N4BUQ
From: "Dave Daniel" <kc0wjn@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Monday, November 4, 2024 5:59:22 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Added Folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index #file-notice
Oh. Right. Good point. I apologjze.
It's just that there seems to have been a trend over the past few years where people DO post with uneccessarily loooonnngg subject lines.
I guess I am just old-school.
Thanks. DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ============================== On Nov 4, 2024, at 15:28, n4buq via groups.io <n4buq@...> wrote:
I believe that email is auto-generated from groups.io. Barry - N4BUQ
From: "Dave Daniel" <kc0wjn@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Monday, November 4, 2024 2:16:50 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Added Folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index #file-notice
Do you have to put the almost entire content of your post in the subject line???DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================
Peter Brown <peter@...> added folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index
Description:
Index of HP physical documentation by instrument number with part numbers for equivalent fiches (where they exist)
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Re: Looking for an HP 970A probe multimeter *battery*
Mark- your post reminded me of the 970A and accessories I have here- with the same issue-I need to rebuild something to replace the battery pack-I do have the dimensions that someone on here sent me a couple of years back- not sure of the date of the thread but can look it up. There were a number of relevant posts at the time and I think the? dimension were in one of them. BUT- a genuine battery case to start with would make it a lot easier. I have verified this 970A is a worker but other projects have got in the way of this one. DaveB, NZ ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Mark Moulding
Sent: Tuesday, November 05, 2024 12:27
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Looking for an HP 970A probe multimeter *battery* ? Hello!? A while back, I picked up a box full of HP 970A probe multimeters - the ones that had a little 3-digit display right near the tip.? There are about eight of them, in various stages of beat-up-ness, along with a few battery chargers of two different types and a few current shunts.? However, there isn't a single battery pack among them. I'd really like to find just one battery pack, of any operational state (I can't imagine it would be working), so that I can take measurements and 3D-print a replacement, hopefully with modern lithium batteries inside.? Does anyone here happen to have one I could acquire (beg, borrow, buy, trade, whatever)?
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Re: HP 16500C Display Question
I had the same reaction.
?
Eventually I came across some information about it. It appears there are a couple (probably more now) of devices to do the conversion and some fairly common pcbs to support them. I haven't got any further than buying a couple of PCBs but I think these are pointers to follow :
?
?
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Dave and Mark:
Just let me know if and when.?
?
Raymond
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Sure, let me know if you need it. Gary ?
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Hi, Gary,
Yes, that's the meter.? I'm actually only interested in the
battery pack, and I may already have a line on one; if that
doesn't work out, perhaps I could borrow yours for a bit to
measure it?
~~
Mark
On 11/4/2024 3:50 PM, Gary Hitchner via
groups.io wrote:
toggle quoted message
Show quoted text
Like this?
Not sure if
pictures come through this list.
Gary
WA2OMY
?
?
Hello!
I've used HP test gear all of my life (I'm 65), and now
have a pretty well-equipped electronics lab at home with
probably half HP and half everything else.? I also have
some older HP computer gear, including HP 85A and 87XM
computers I use to control the test gear with, and an HP
2100A that I'm restoring.
I use this gear professionally to design "widgets" that I
sell to various customers - primarily industrial, but also
some laboratories.? I also build boutique musical
equipment and hope to introduce a product into that market
next year.? Along the way I restore and maintain my older
audio equipment.
Right now I'm searching for a battery for an HP 970A probe
multi-meter.? It doesn't matter if it works (it almost
surely wont); I want to measure the case, then 3D-print a
drop-in replacement using modern lithium batteries.? I'm
hoping that I can beg, borrow, trade, or buy one for that
purpose.
Thanks!
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Re: Added Folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index
#file-notice
Oh. Right. Good point. I apologjze.
It's just that there seems to have been a trend over the past few years where people DO post with uneccessarily loooonnngg subject lines.
I guess I am just old-school.
Thanks. DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================
toggle quoted message
Show quoted text
On Nov 4, 2024, at 15:28, n4buq via groups.io <n4buq@...> wrote:
? I believe that email is auto-generated from groups.io.
Barry - N4BUQ
From: "Dave Daniel" <kc0wjn@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Monday, November 4, 2024 2:16:50 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Added Folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index #file-notice
Do you have to put the almost entire content of your post in the subject line???DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================
Peter Brown <peter@...> added folder /A temporary directory for photographs and help relating to emails and posting/Fiche Library index
Description:
Index of HP physical documentation by instrument number with part numbers for equivalent fiches (where they exist)
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PS, there is a ground wire that broke off when I removed it from the case, looks like the rubber deteriorated. Gary ? ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Mark Moulding
Sent: Monday, November 4, 2024 6:29 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] New to the group.? Hello!
I've used HP test gear all of my life (I'm 65), and now have a pretty well-equipped electronics lab at home with probably half HP and half everything else.? I also have some older HP computer gear, including HP 85A and 87XM computers I use to control the test gear with, and an HP 2100A that I'm restoring.
I use this gear professionally to design "widgets" that I sell to various customers - primarily industrial, but also some laboratories.? I also build boutique musical equipment and hope to introduce a product into that market next year.? Along the way I restore and maintain my older audio equipment.
Right now I'm searching for a battery for an HP 970A probe multi-meter.? It doesn't matter if it works (it almost surely wont); I want to measure the case, then 3D-print a drop-in replacement using modern lithium batteries.? I'm hoping that I can beg, borrow, trade, or buy one for that purpose.
Thanks!
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Like this? Not sure if pictures come through this list. Gary WA2OMY ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Mark Moulding
Sent: Monday, November 4, 2024 6:29 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] New to the group.? Hello!
I've used HP test gear all of my life (I'm 65), and now have a pretty well-equipped electronics lab at home with probably half HP and half everything else.? I also have some older HP computer gear, including HP 85A and 87XM computers I use to control the test gear with, and an HP 2100A that I'm restoring.
I use this gear professionally to design "widgets" that I sell to various customers - primarily industrial, but also some laboratories.? I also build boutique musical equipment and hope to introduce a product into that market next year.? Along the way I restore and maintain my older audio equipment.
Right now I'm searching for a battery for an HP 970A probe multi-meter.? It doesn't matter if it works (it almost surely wont); I want to measure the case, then 3D-print a drop-in replacement using modern lithium batteries.? I'm hoping that I can beg, borrow, trade, or buy one for that purpose.
Thanks!
|
On 11/4/24 18:29, Mark Moulding wrote: I've used HP test gear all of my life (I'm 65), and now have a pretty well-equipped electronics lab at home with probably half HP and half everything else.? I also have some older HP computer gear, including HP 85A and 87XM computers I use to control the test gear with, and an HP 2100A that I'm restoring.
I use this gear professionally to design "widgets" that I sell to various customers - primarily industrial, but also some laboratories.? I also build boutique musical equipment and hope to introduce a product into that market next year.? Along the way I restore and maintain my older audio equipment. It's great to see you on this list too, Mark, Welcome! I'm a decade behind you at 55, but I'm in essentially the same situation, minus (unfortunately) the music and audio stuff. Most of my work is in designing boards for analytical chemistry equipment and M2M/IoT communications. My gear isn't exactly "at home"; my wife and I have a biggish (24K sq. ft.) commercial building that houses her business, my business, and our apartment. So while we do live in a different part of the building, I don't really consider it a "home lab". So, tech nerds of a feather. :) Right now I'm searching for a battery for an HP 970A probe multi-meter. It doesn't matter if it works (it almost surely wont); I want to measure the case, then 3D-print a drop-in replacement using modern lithium batteries.? I'm hoping that I can beg, borrow, trade, or buy one for that purpose. I'd be interested to know of your progress on that front! -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Troubleshooting a 8591e with opt 130
Hi, I did the same tests as you, results in the tables. ? I attached a picture showing the diodes of the first mixer, I did the repair of two Spectrum this year with damaged diodes, so the one with which I did the attenuator tests today. Maybe you should do this check. Ideally, if you had another measuring instrument that would allow you to know the RF level at the J3 connector of the first converter, you could know if the first converter is OK. ? correction at OFF SPAN 100kHz resBW 10kHz vidBW 100Hz MKR peak REFlevel at -10dBm ? 300MHz | -20dBm | ATT | Level measured | 0 | -19.4 | 10 | -19.3 | 20 | -19.7 | 30 | -19.7 | 40 | -19.8 | 50 | -19.9 | 60 | -20.0 | | | 1500MHz | -20dBm | ATT | Level measured | 0 | -21.2 | 10 | -21.2 | 20 | -21.5 | 30 | -21.5 | 40 | -21.8 | 50 | -21.7 | 60 | -21.8 |
? Yves ? ? Continuing on the cal signal I checked the attenuator steps. After factor default and with correction off I found the following: I'm guessing my 20db attenuator is toast but I would have expected to have seen the issue coming back at the higher attenuation levels. Could this behavior be caused by something else??
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Hello!
I've used HP test gear all of my life (I'm 65), and now have a pretty well-equipped electronics lab at home with probably half HP and half everything else.? I also have some older HP computer gear, including HP 85A and 87XM computers I use to control the test gear with, and an HP 2100A that I'm restoring.
I use this gear professionally to design "widgets" that I sell to various customers - primarily industrial, but also some laboratories.? I also build boutique musical equipment and hope to introduce a product into that market next year.? Along the way I restore and maintain my older audio equipment.
Right now I'm searching for a battery for an HP 970A probe multi-meter.? It doesn't matter if it works (it almost surely wont); I want to measure the case, then 3D-print a drop-in replacement using modern lithium batteries.? I'm hoping that I can beg, borrow, trade, or buy one for that purpose.
Thanks!
|
Looking for an HP 970A probe multimeter *battery*
Hello!? A while back, I picked up a box full of HP 970A probe multimeters - the ones that had a little 3-digit display right near the tip.? There are about eight of them, in various stages of beat-up-ness, along with a few battery chargers of two different types and a few current shunts.? However, there isn't a single battery pack among them.
?
I'd really like to find just one battery pack, of any operational state (I can't imagine it would be working), so that I can take measurements and 3D-print a replacement, hopefully with modern lithium batteries inside.? Does anyone here happen to have one I could acquire (beg, borrow, buy, trade, whatever)?
?
Thanks!
~~
Mark
|
Dave McGuire
