I can choose not to participate.

Sean

The owner of every forum is exempt from every rule they set, and you
can't do anything about it. This forum, unlike others, states it
outright. I put this rule in explicitly so people who make trouble
don't start contrived technical legal babble arguments about what I
may or may not do when I'm moderating the platform. This prevents any
"gotcha" moments. This sort of trolling strategy comes up often enough
on well populated forums that it's a real time waster.

For example, let's say someone said a racist cuss word. I'll kick them
off saying "you're getting kicked off because you said X". Then
they'll start arguing that I should kick myself off, or something
equally stupid. I've had this happen a million times and I can't be
bothered with that. Hence rule 6.




On Tue, Jan 4, 2022 at 7:32 AM Sean Turner via groups.io
<sdturne@...> wrote:

Rule #6: "The server owner is exempt from all rules for obvious reasons"

I'll pass.

Sean

Hi Matt

My service manual P/N is 08663-90071, covering from 2234A to 2927A and found nothing about that keystrokes :(
However, my unit has serial 2846A opt 002, if you need data or whatever for comparison, tell me. Maybe I can help ;)

Regards,
R.

Does anyone have a copy of the 54720 or 54710 firmware disk? If I
could take a look at that, I can probably figure out how to make a
54717a eeprom image for you.

On Tue, 4 Jan 2022 at 16:55, Arkadiusz Gibes via groups.io
<arkadiusz.gibes@...> wrote:

I already found the 54712 eeprom image that you shared. Do you have any possibility, to download same firmware from the other unit ? I would like to compare. I have one 54712 unit, but still don't have programmer.

W wtorek, 4 stycznia 2022, 16:46:54 UTC, Ovidiu Popa [Business] <ovidiu.popa@...> napisa?(-a):


Sorry, no, I gave up and wrote off the 54720D. I have too many scopes anyway, from 100MHz to 50GHz, not enough incentive to spend more time on this. Meantime, watching for a 54717A, ideally someone owning one could dump the EEPROM. I know if I'd get one, this would be the first thing I'd do, this HP money grabbing calibration abomination has to end.

If someone wants to pick up, I can forward the 54712A EEPROM binary.

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On Tue, Jan 4, 2022 at 04:58 PM, nigel adams wrote:

9825 calculator

We used 9825s with automated headset test equipment at Plantronics in the 1980s. ?All of the test equipment and sound sources were connected via HPIB.

On 2022-01-04 6:16 p.m., Jim Ford wrote:

Hmmmm.... We used something similar at Varian Beverly Microwave Division in 1986.? I can't remember the model number, but like the 9825, what we used was more than a calculator and less than a full-blown computer.? Ours had an LCD screen, though.? We used it to calculate pi pad resistor values.? Anybody remember the model no?? ? ? ? ? ? ? ? ? ?Jim Ford

The only thing from HP I can think of from around that time? that had a LCD screen would have been the portable 45710A or portable plus 45711B both of which had MSDOS in ROM.? There was also the larger Integral which had a LCD like screen and ran HP-UX from ROM.

Paul.

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All,
I have unearthed a 98034A HPIB adaptor for the 9825 calculator.
I will also post in the for sale group but have seen people discuss such items on here to so hope admins will allow this indiscretion.
I don’t have anything else related to this unit - although there appears to be plenty on the web.
Looks in good condition - although I am unable to test it.
If anyone would like to make me an offer for it, based in uk.
Regards
Nigel

Sent from my iPad by banging a nail into a piece of wood...

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Mini oscilloscopes are one of my collecting and restoration interests.? I am looking for a Philps PM-3000 or 3010. Need not be working, completeness is important.? AND- I am still looking for a Tektronix 224 handheld scope at a reasonable price. Thanks,

?? Bruce Gentry, KA2IVY

Jeremy Nichols <jn6wfo@...> added the album HP-5347/48A and HP-5361A Coffee mug: “Two instruments in one.” Promotional item from the 1970s. Images appear when hot liquid is poured into the mug. My error was putting the mug in the microwave oven. Now the images are permanent. Free for shipping.

On 1/3/22 7:11 AM, Anders wrote:

I am testing a battery protector for LiFePO4. It measures individual cell voltages from a stack of four cells and cuts out if any of the cells fall under or goes over a preset value. The 44702 + 44711 lets me measure all cell voltages and the voltage over the shunt over time when testing charging and discharging. Data is sent over GPIB to Excel.
If anyone has one of these, then I have some collected program snippets here:?

I picked up one of these not long ago, largely because of the great info on your page. I've not gotten any modules for it yet, though.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

The keycode assembly on my HP 8663A is failing to interrupt the microprocessor. To narrow down the fault to an IC, I was hoping to use signature analysis on the keycode assembly. In the manual I have (2234A to 2927A, vol 2) under service sheet BD9 there is a "KEYCODE STIMULUS DIAGNOSTIC", which states the following:

This test stimulates the A2A1 Keycode Assembly for signature
analysis testing. Refer to Service Sheets 61 and 62 troubleshooting
information for procedures and the use of this Diagnostic.

However, when I refer to the these service sheets in vol 4 (same serial prefix range) I don't see any signature analysis information. Each service sheet contains a block diagram, a component locator and a schematic, but I don't see SA information on any of these. I was expecting to see 4-digit hex sequences by various nodes in the schematics. Or, I was expecting to see something like the signature analysis table in the "SIGNATURE ANALYSIS I/O DIAGNOSTIC". What am I missing?

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What did you use to make the connection?

Hi all,ive an old hp 545o3a scope,i was looking at the callibrator signal from my tek 2430 with this,it states on the front panel that it outputs 400mv into 1megohm and 200mv into 50 ohms,when set to 50 ohm input on my hp scope it reads about double! that,does it need the attenuators calibrating?,if so how do you do it?,Tia.

Sorry, no, I gave up and wrote off the 54720D. I have too many scopes anyway, from 100MHz to 50GHz, not enough incentive to spend more time on this. Meantime, watching for a 54717A, ideally someone owning one could dump the EEPROM. I know if I'd get one, this would be the first thing I'd do, this HP money grabbing calibration abomination has to end.

If someone wants to pick up, I can forward the 54712A EEPROM binary.

its sorted,when i first got this it had a bad psu,recapping the psu got it going,at the time i didnt have suitable load resistors to set the 5.2v output,when i finaly checked it was at about 5.8v,anyway i set it to 5.2 and recalibrated the scope,it now seems to be spot on,i can only think the first calibration i did when the psu output was too high caused the bad readings,after a recal its now fine.

Hi all,ive an old hp 545o3a scope,i was looking at the callibrator signal from my tek 2430 with this,it states on the front panel that it outputs 400mv into 1megohm and 200mv into 50 ohms,when set to 50 ohm input on my hp scope it reads about double! that,does it need the attenuators calibrating?,if so how do you do it?,Tia.