Re: Old style oval HP power cords
I have, in an emergency, crimped individual Molex-style female pins to the power cord wires, added shrink-tubing insulation, and then pushed the female pins onto the male pins of the connector in the HP chassis. This obviously requires knowledge of which wire goes to which pin, and I'd be nervous about letting anyone other than myself use that equipment¡ªbut it does work. I suppose you could also cast or 3D print a plug to surround those pins, thus duplicating the lost original cord.
Jeremy N6WFO
On Wed, Jan 3, 2024 at 9:44?AM Greg Muir via <big_sky_explorer= [email protected]> wrote: If you have the power cords with reversed hot/neutral that were commonplace for use on Friden calculators simply cut off the AC plug end and install a new one wired in reverse.? I seriously doubt if anyone will take the time to disassemble the cord and look for wire color errors in regards to the modification.
?
Simplicity at its best.
?
Way back when the word was starting to circulate that Belden was going to discontinue manufacturer of these cords I made a quantity buy.? And at that time the amount of HP and other equipment that was coming onto the surplus market was rife with these style power receptacles. Over the 45 years or so I have slowly eaten up the supply and now have only a couple left.? But the ~$6 per cord at that time was easy on the pocketbook.
?
Use of a modified IEC power cord is rather Draconian given the mis-fit of the round versus flat contacts.? Brute force when mating such an arrangement will most probably result in damage to the contacts or even break them away from their mounting inside the equipment receptacle.
?
Greg
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Re: Old style oval HP power cords
If you have the power cords with reversed hot/neutral that were commonplace for use on Friden calculators simply cut off the AC plug end and install a new one wired in reverse.? I seriously doubt if anyone will take the time to disassemble the cord and look for wire color errors in regards to the modification.
?
Simplicity at its best.
?
Way back when the word was starting to circulate that Belden was going to discontinue manufacturer of these cords I made a quantity buy.? And at that time the amount of HP and other equipment that was coming onto the surplus market was rife with these style power receptacles. Over the 45 years or so I have slowly eaten up the supply and now have only a couple left.? But the ~$6 per cord at that time was easy on the pocketbook.
?
Use of a modified IEC power cord is rather Draconian given the mis-fit of the round versus flat contacts.? Brute force when mating such an arrangement will most probably result in damage to the contacts or even break them away from their mounting inside the equipment receptacle.
?
Greg
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Re: Opposite problem: disintegrating Old style Oval HP Receptacle ( ... was Old style oval HP power cords )
Note that these were made in grounded and ungrounded versions, there are a few that used the ungrounded variant with an inductor to the case, the 331A is one example.
Also they are used for many other brands of test equipment in the 1960s, not just HP.
David
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Re: HP8510B Reading and writing A13 EEPROM, problem with Xicor x28256
Hi Bruce,?
Thanks for the offer! Much appreciated, but what I really would like is to make sure I write to the EEPROMs?correctly. Is your impression that all writes work immediately or do you have to do repeated writes in order for the FW to be correctly entered?
I believe you have some of Wayne's documentation, and possibly also the code he used for writing to the x28256 EEPROMs? It would be great if you could upload this here to have a look at.?
I think I'm fairly close to having working code - only a few ICs won't accept data properly. Possibly the code is OK and I only have some bad ICs.
My goal is to make sure I have a working solution and I can then upload this code for anyone to use. It would then be possible to read/write the A13 EEPROMS using an Arduino MEGA2560 and DuPont cables only.?
Regards,
? Staffan
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Re: Opposite problem: disintegrating Old style Oval HP Receptacle ( ... was Old style oval HP power cords )
I have a used one - good condition - that you can have.
Thanks,
Barry - N4BUQ
From: "gren" <hrgerson@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Wednesday, January 3, 2024 10:42:18 AM
Subject: [HP-Agilent-Keysight-equipment] Opposite problem: disintegrating Old style Oval HP Receptacle ( ... was Old style oval HP power cords )
I have the opposite problem:
I have an instrument where the Old hp Oval Receptacle has disintegrated due to misuse or time.
It is so bad that it causes intermittent AC mains issues and is on the verge of shorting.
-? Does anyone have a?? spare,? good condition ? or?? NOS? hp Oval receptacle ?
thank you,
rick?
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Re: Opposite problem: disintegrating Old style Oval HP Receptacle ( ... was Old style oval HP power cords )
That is a PH-163 connector. Here's one:
Paul
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On Wed, Jan 03, 2024 at 08:42:18AM -0800, gren wrote: I have the opposite problem:
I have an instrument where the Old hp Oval Receptacle has disintegrated due to misuse or time.
It is so bad that it causes intermittent AC mains issues and is on the verge of shorting.
-? Does anyone have a?? spare,? good condition ? or?? NOS? hp Oval receptacle ?
thank you,
rick
!DSPAM:65958e70136296053426310!
--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@... | Unix/Linux - We don't do windows
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Opposite problem: disintegrating Old style Oval HP Receptacle ( ... was Old style oval HP power cords )
I have the opposite problem:
I have an instrument where the Old hp Oval Receptacle has disintegrated due to misuse or time.
It is so bad that it causes intermittent AC mains issues and is on the verge of shorting.
-? Does anyone have a?? spare,? good condition ? or?? NOS? hp Oval receptacle ?
thank you,
rick?
|
Re: Old style oval HP power cords
On Tuesday 02 January 2024 01:32:46 pm Dave McGuire wrote: On 1/2/24 13:26, John Griessen wrote:
On 1/2/24 09:57, Paul Amaranth wrote:
> I did run across a post from Dale Cook where he says you can often shave
> down a standard IEC cord to fit and it will have the correct
configuration.
On 1/2/24 11:08, Paul Amaranth wrote:
I just tried this, and not well. Oh well, square hole, round peg...
Back to filing and drilling. Are people really having such a difficult time finding the proper
cables? They do show up from time to time. I've never had much trouble
getting them when needed. It sure beats all this hacking about. I know that I haven't seen them around for a good long time. OTOH I have a big box of the more standard ones around here, including a few variations in color, some right angle, etc. I *may* have one of those older style ones somewhere, I'm not sure. I am sure that I don't have anything here that uses them. Some time back I had a guy who was looking for one, offered me $40 for one that I had, and I sent it off to him. That one might have been for a music synthesizer, I'm not sure any more. The two configurations of those is bothersome as well. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin
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Re: HP8510B Reading and writing A13 EEPROM, problem with Xicor x28256
If you wind up needing help, I can write a good Eprom for you
Cheers!
Bruce
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HP 54522A Firmware Re-flash Error
Hi,
I'm getting an error when I try to re-flash the firmware from disk on my HP 54522A oscilloscope that I purchased a year ago. The scope has been working fine for a year and started giving me trouble during the boot up check. I replaced the lithium nonvolatile ram battery and while trying to re-flash the latest firmware from the disk, I get an error during the update. The ROM image flashes successfully but after the re-flash of the System image I receive the following Message stating "Updating From File: System Failed: 4, 15, 38982". I'm wondering if this is indicating a bad flash Rom IC. Any help would be appreciated. Note: The disk read of the System image file reads successfully during the re-flash but fails on the writing to the Flash Rom (Attached picture shows error results).
Thanks in advance
DanV Fenton,MI
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Re: Old style oval HP power cords
Hello and happy new year to the group. I have a number of older HP test gear that has the small 3 pin cords and also have the correct cords. What I am seeing is the typical 40 year plus plastic/rubber degradation setting in. When buying cords ask the seller the condition of the cord. You may not be happy with what you receive. As far as changing things out it really is quite the pain. Maybe after you do a few and are committed to the effort it gets easier. Suspect one way or another I will become an expert. Not to excited. Regards Paul WB8TSL
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Re: Agilent E4406A / 16700 CPU issue
I am not sure if this will help but my E4406A had a black screen after
power on. I removed the 2 daughter boards on the motherboard (flash
board and additional RAM board).
After this, the E4406A started. I added back the flash board and it also
worked and booted correctly the OS.
After this I added the RAM board back and again black screen. I
inspected the RAM board and I have seen on the backside some dirty area,
looks like something burned the traces near one of the connectors. I
didn't manage to fix it since I don't know where the traces should go
but now my E4406A works fine without the extra memory.
The CPU board uses a PA-RISC CPU and a stripped down version of HP-UX.
Another issue with these devices is the fan board which has some caps
failing. From what I remember it can also prevent booting and behaves
strange.
EEPROM from what I know, it has only calibration data and maybe the
ID/Model/SN of the unit but this should not prevent booting if damaged.
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On 03/01/2024 09:49, Board via groups.io wrote: The crystal and clock is fine. I measured 150 MHz on the clock generator
IC, which is the correct frequency. The ROM is soldered to the board,
and desoldering it would be a pain. I have a programmer but I'd need to
get the boot ROM code (which I can't find anywhere) and the socket.
_._,_._,_
------------------------------------------------------------------------
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Re: HP8510B Reading and writing A13 EEPROM, problem with Xicor x28256
Hello,
Good points. I checked voltage and noticed only approx 20 mV drop during access to the ICs. Only checked one of the ones that were successful in writing. Will check the other ones also. Away from my lab right now so it will take a few days though.
Being an HP design of the 1980-ies, I would expect those issues to be taken care of, but perhaps a failing cap?
All signal lines to the EEPROMS are buffered on the board by the way and the Arduino seems to output levels well within TTL requirements.
I'm thinking if there is something with the IC itself, but wonder if there is really anything that can degrade from age? It is not that the complete IC is dead, but rather just bytes are off.
I know people have updated the firmware, but not sure if this was an immediate success or if this kind of behaviour is common - hoping there may be a workaround...
Regards,
? Staffan?
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Re: Agilent E4406A / 16700 CPU issue
The crystal and clock is fine. I measured 150 MHz on the clock generator IC, which is the correct frequency. The ROM is soldered to the board, and desoldering it would be a pain. I have a programmer but I'd need to get the boot ROM code (which I can't find anywhere) and the socket.?
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Re: 00105-6013 HP crystal oscillator wanted
On Tue, Jan 2, 2024 at 01:54 PM, J. L. Trantham wrote:
Thanks very much for the link. It's exactly what I was looking for! Morris
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Re: HP8510B Reading and writing A13 EEPROM, problem with Xicor x28256
Hi.
As in all things EEPROM related to programming trouble.
'Sope the Power rails, make sure they are not sagging during the actual writing phase, even for a fraction of the time..? Also, the actual address and data line signal voltages need to be "up to snuff" relative to the EEPROM's data sheet (probably needing decent buffers) along with the timing values too.
Commercial programmers have *Very* strict regulation during programming, and then verify them at the minimum, nominal and maximum specified Vdd rail voltages to ensure things are all good.
Modern EEPROMS are not as easy or forgiving as the old-school 27x series EPROMS to use.? (From first hand experience!)? They are easier to damage due to ESD though!? (Also, First hand experience!)
Take care.
Dave B.
--
Sent from a MicroSoft free zone:
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Re: Agilent E4406A / 16700 CPU issue
That's much newer than the ancient 8085 or 6809 micro that i'd rather be working on, but the same principles should apply. Does your micro IC have power and ground?, it sounds like it does. Did you measure the frequency of any CPU reference crystal, if drifted/failed? With a logic probe or oscilloscope, what does the I/O look like during boot up? Do you have another ROM to try?
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Agilent E4406A / 16700 CPU issue
I have an Agilent E4406A which has a broken CPU board. This is the same board in the 167xx logic analyzers, which I'm pretty sure a lot of people here have experience with. The board gets stuck during the boot cycle, and the graphics chip on it is never reset, so I can't get any debug information out of it.?
The board starts out with all four of the diagnostic LEDs lit. Then, the left one turns off, which happens according to the manual. The manual claims that the left LED should turn off and the others should turn off after, but this doesn't happen, and the CPU board just seems to hang. I've tried running it for a few minutes, but I got no change. The graphics chip is not being reset because it is outputting 32Hz VSYNC and 34.7kHz HSYNC, and it should be outputting 60Hz. I've tried removing various board connected to the CPU, like the digital board, floppy disk reader, and front panel, but nothing works. I also tried running just the motherboard off an external power supply. After hitting the two reset buttons randomly, I was able to get the CPU to enter another cycle, and I was able to get the graphics chip to reset, but there was no output from the VGA connector.??
So far I've fixed one issue with it, which was a badly soldered EEPROM (I have no idea how that made it out of the factory, but there was an EEPROM with some pins unsoldered). I noticed that the CPU was constantly trying to write to an EEPROM during the boot cycle, and that led me to discover the unsoldered pins. The LED pattern was - X - - (2nd LED on) before, and after it's - X X X. The CPU seems to be good. I believe the issue is with the bootrom or the Atmel 28C64 EEPROM on the back. Any ideas on how to identify the problem and fix it? My current guess is that the CPU wrote bad data into the EEPROM since one of the data pins was unsoldered, and after resoldering it the wrong data is causing the boot to fail.
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Re: Old style oval HP power cords
Greetings,
I may have some of these power cords.
Do I correctly remember that there were two different wiring relationships between the male plug and the female socket?
I¡¯m thinking I would like $10.00/ea plus postage.
Shall I look and see what I have in storage?
Regards,
Ken
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On Jan 2, 2024, at 11:32 AM, Dave McGuire <mcguire@...> wrote:
On 1/2/24 13:26, John Griessen wrote:
On 1/2/24 09:57, Paul Amaranth wrote:
I did run across a post from Dale Cook where he says you can often shave
down a standard IEC cord to fit and it will have the correct configuration. On 1/2/24 11:08, Paul Amaranth wrote:
I just tried this, and not well. Oh well, square hole, round peg...
Back to filing and drilling. Are people really having such a difficult time finding the proper cables? They do show up from time to time. I've never had much trouble getting them when needed. It sure beats all this hacking about.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
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Re: 00105-6013 HP crystal oscillator wanted
See if this helps. ? ? Good luck. ? Joe ?
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From: [email protected] < [email protected]> On Behalf Of Morris Odell Sent: Tuesday, January 2, 2024 3:16 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] 00105-6013 HP crystal oscillator wanted ? On Tue, Jan 2, 2024 at 10:11 AM, factory wrote: Some pictures for reference (from expired ebay listing) of the 18011 oscillator & the extra boards, I can't comment any further as I haven't got one of these.
Thanks David,
I have a possible source for a 18011 but if I go down that path I would need to make up a substitute for the 05061-6199 interface board shown in the pic. It doesn't look too complex.If anyone has a schematic of that board I would love to see it. Shoehorning the 18011 into the 5061A would be an interesting challenge.
Regards,
Morris
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Jeremy Nichols
factory
Board