Re: HP 8901B/8902A History
¡°About 100¡± is what my memory says.?
On Sun, Feb 28, 2021 at 1:58 PM Mike Vande Voort < mike@...> wrote: Any idea what quantity that run was ?
On Sun, Feb 28, 2021, 2:31 PM Jeremy Nichols < jn6wfo@...> wrote: Making the decision on a ¡°lifetime buy¡± can be treacherous! I know of one specific case because I was there (at HP Santa Clara) when it happened, sometime in the 1970s. Someone determined that a particular HP-made IC was used only in obsolete equipment and, after making a lifetime buy of that chip, obsoleted the design. We, in HP¡¯s photomask group, dutifully obsoleted the tooling for that mask set.?
Sometime later, a product surfaced, still in ¡°support life,¡± and using that IC. Inventory was soon reduced to zero with customers demanding parts to fix their instruments. Fortunately, we had not destroyed the artwork masters and were able to create a one-off set of stepmasters, just enough for one run through IC fab. The resulting parts worked out to $1,000 each and that is what they charged the customers!?
Jeremy?
On Sun, Feb 28, 2021 at 9:32 AM Rick - WA6NDR < nungester@...> wrote: > Say, Rick, did you know Matt Hunton at HP Spokane Division?
Sorry no, but it could just be me not remembering.
> ...later versions of the 8902A did not use the F8 ... Do you know anything about that ...
Fairchild announced the F8 would become obsolete and HP made a projected lifetime purchase for all F8-based 890nx products. The estimates ended up being low and we ran out of F8 haredare, so the F8 assembly code was program-translated to another CPU but I forget which one. I wasn't involved in that effort but know the engineer that did it, who likewise still lives in Spokane, WA.
> I tried on mine with firmware 94.1991 and it didn't appear on any of those functions.
Thanks for trying. In 1983 I went on to other projects and had no idea HP production engineers were still doing firmware releases as late as 1991! Big surprise to me.
> ... the 11794A softpac ... how you can get the information from the 8902A keyboard?
Sorry but no knowledge about that.
Jeremy Nichols
6.
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Re: Historical question-HP frequency standards
Thanks, I¡¯m asking here too.
On Sun, Feb 28, 2021 at 2:10 PM Dave Daniel < kc0wjn@...> wrote: Time Nuts is hosted by Febo, not .
DaveD
> On Feb 28, 2021, at 16:33, Tom Holmes <tholmes@...> wrote:
>
> Jeremy...
>
> I'd bet someone on the time-nuts list could help
> answer that question. It is also on .
>
> Tom Holmes, N8ZM
>
>
>
>
>
>
>
>
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Re: Historical question¡ªHP frequency standards
I have a100-A or B not in working condition. ?The one with the crystal oven.
Leon Robinson ?K5JLR
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-------- Original message -------- From: Jeremy Nichols <jn6wfo@...> Date: 02/28/2021 2:48 PM (GMT-06:00) To: [email protected] Subject: [HP-Agilent-Keysight-equipment] Historical question¡ªHP frequency standards Does anyone know how many of its ¡°first family¡± of frequency standards HP made? That would be the HP-100A (starting in 1943) through HP-100E (ending 1967). Just curious¡ªI have a 100E, made in or after 1961.?
Jeremy? -- Jeremy Nichols
6.
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Re: Historical question-HP frequency standards
Time Nuts is hosted by Febo, not groups.io.
DaveD
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On Feb 28, 2021, at 16:33, Tom Holmes <tholmes@...> wrote:
Jeremy...
I'd bet someone on the time-nuts list could help
answer that question. It is also on groups.io.
Tom Holmes, N8ZM
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Re: HP8595A firmware request
At 2021-02-28 04:16 PM, Angelo M. Castellano via groups.io
wrote:
My HP8595A spectrum analyser is
stuck because of corrupted firmware on EPROM.
Could anybody please help?
I have an 8595E if that helps. I'm reluctant to open it up as it's
working fine. Is there a way to dump the EEPROMs via GPIB etc?
Steve Hendrix
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Re: HP 8901B/8902A History
Any idea what quantity that run was ?
On Sun, Feb 28, 2021, 2:31 PM Jeremy Nichols < jn6wfo@...> wrote: Making the decision on a ¡°lifetime buy¡± can be treacherous! I know of one specific case because I was there (at HP Santa Clara) when it happened, sometime in the 1970s. Someone determined that a particular HP-made IC was used only in obsolete equipment and, after making a lifetime buy of that chip, obsoleted the design. We, in HP¡¯s photomask group, dutifully obsoleted the tooling for that mask set.?
Sometime later, a product surfaced, still in ¡°support life,¡± and using that IC. Inventory was soon reduced to zero with customers demanding parts to fix their instruments. Fortunately, we had not destroyed the artwork masters and were able to create a one-off set of stepmasters, just enough for one run through IC fab. The resulting parts worked out to $1,000 each and that is what they charged the customers!?
Jeremy?
On Sun, Feb 28, 2021 at 9:32 AM Rick - WA6NDR < nungester@...> wrote: > Say, Rick, did you know Matt Hunton at HP Spokane Division?
Sorry no, but it could just be me not remembering.
> ...later versions of the 8902A did not use the F8 ... Do you know anything about that ...
Fairchild announced the F8 would become obsolete and HP made a projected lifetime purchase for all F8-based 890nx products. The estimates ended up being low and we ran out of F8 haredare, so the F8 assembly code was program-translated to another CPU but I forget which one. I wasn't involved in that effort but know the engineer that did it, who likewise still lives in Spokane, WA.
> I tried on mine with firmware 94.1991 and it didn't appear on any of those functions.
Thanks for trying. In 1983 I went on to other projects and had no idea HP production engineers were still doing firmware releases as late as 1991! Big surprise to me.
> ... the 11794A softpac ... how you can get the information from the 8902A keyboard?
Sorry but no knowledge about that.
Jeremy Nichols
6.
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Re: Historical question-HP frequency standards
Jeremy...
I'd bet someone on the time-nuts list could help
answer that question. It is also on groups.io.
Tom Holmes, N8ZM
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My HP8595A spectrum analyser is stuck because of corrupted firmware on EPROM.
Could anybody please help?
Thanks in advance.
73 de IK0BGG Angelo
IK0BGG(at)gmail(dot)com
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I transmitted into my 8657B and the protection circuitry activated.? After a reset, the output of the generator was down 20 dB from normal.? The problem was in the switches, two ICs, that switched the frequency doubler in and out.? After replacing those all was well again.
Bob
On Sunday, February 28, 2021, 01:16:40 PM PST, Eliud <carabe01@...> wrote:
It has options 1 and 2 but not 3 which may have helped. Posible it did suffer from accidentally TX from a transmitter- ive heard its quite common. Former owner said it was working ok until one day it stopped.?
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It has options 1 and 2 but not 3 which may have helped. Posible it did suffer from accidentally TX from a transmitter- ive heard its quite common. Former owner said it was working ok until one day it stopped.?
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Thanks Jon,
previous owner gave me a nice original copy of the service manual and it has all the diagrams. Ill give it some time TLC and will report back.?
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Re: Wanted: Foot for bottom panel, HP 13xx series
Search ebay for "hp feet". Their are many available.
Regards
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On 2/28/2021 3:57 PM, Toby wrote: Hi,
Just a shot in the dark to see if anyone has one of these feet to
replace a missing one, or the whole bottom panel, 208 x 468mm (this is a
1333A but the cabinet was fairly common i think):
--Toby
--
This email has been checked for viruses by Avast antivirus software.
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Wanted: Foot for bottom panel, HP 13xx series
Hi,
Just a shot in the dark to see if anyone has one of these feet to
replace a missing one, or the whole bottom panel, 208 x 468mm (this is a
1333A but the cabinet was fairly common i think):
--Toby
|
Corollary: An object's durability is inversely proportional to its cost.
Thanks,
Barry - N4BUQ
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----- Original Message ----- From: "Wilko Bulte" <wkb@...>
To: [email protected]
Sent: Sunday, February 28, 2021 2:43:50 PM
Subject: Re: [HP-Agilent-Keysight-equipment] HP8640B no rf out
And, generally, the sensitivity to irreparable damage due to abuse also
increases (kwadratically or so?) with price.
Another special case of Murphy's Law
Wilko
PA1WBU
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Historical question¡ªHP frequency standards
Does anyone know how many of its ¡°first family¡± of frequency standards HP made? That would be the HP-100A (starting in 1943) through HP-100E (ending 1967). Just curious¡ªI have a 100E, made in or after 1961.?
Jeremy? -- Jeremy Nichols
6.
|
And, generally, the sensitivity to irreparable damage due to abuse also increases (kwadratically or so?) with price.
Another special case of Murphy's Law
Wilko
PA1WBU
|
Re: HP 8901B/8902A History
Making the decision on a ¡°lifetime buy¡± can be treacherous! I know of one specific case because I was there (at HP Santa Clara) when it happened, sometime in the 1970s. Someone determined that a particular HP-made IC was used only in obsolete equipment and, after making a lifetime buy of that chip, obsoleted the design. We, in HP¡¯s photomask group, dutifully obsoleted the tooling for that mask set.?
Sometime later, a product surfaced, still in ¡°support life,¡± and using that IC. Inventory was soon reduced to zero with customers demanding parts to fix their instruments. Fortunately, we had not destroyed the artwork masters and were able to create a one-off set of stepmasters, just enough for one run through IC fab. The resulting parts worked out to $1,000 each and that is what they charged the customers!?
Jeremy?
On Sun, Feb 28, 2021 at 9:32 AM Rick - WA6NDR < nungester@...> wrote: > Say, Rick, did you know Matt Hunton at HP Spokane Division?
Sorry no, but it could just be me not remembering.
> ...later versions of the 8902A did not use the F8 ... Do you know anything about that ...
Fairchild announced the F8 would become obsolete and HP made a projected lifetime purchase for all F8-based 890nx products. The estimates ended up being low and we ran out of F8 haredare, so the F8 assembly code was program-translated to another CPU but I forget which one. I wasn't involved in that effort but know the engineer that did it, who likewise still lives in Spokane, WA.
> I tried on mine with firmware 94.1991 and it didn't appear on any of those functions.
Thanks for trying. In 1983 I went on to other projects and had no idea HP production engineers were still doing firmware releases as late as 1991! Big surprise to me.
> ... the 11794A softpac ... how you can get the information from the 8902A keyboard?
Sorry but no knowledge about that.
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Re: Old HP 8558B spectral analyzer
Re,
the serial number of the HP 8558B is 1321Axxxx
I¡¯m new to this agile forum.
So I don¡¯t have all the knowledge on the HP8558 yet
cdt
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Old HP 8558B spectral analyzer
Hello,
Good evening,
I¡¯m fixing an HP8558B spectrum analyzer.
It looks like it¡¯s working, but the displays aren¡¯t working. (Nothing)
I do have a voltage "Meter voltage" which work? with the frequency on the connector (904). All powers? are good.
The first problem is that I can¡¯t find the electronic diagram that manages the displays (A1..) Impossible to found something on the net
See pictures 2 and 3
It must be an old version, because it is made of 5 small pcb connected like an accordion. (See pictures)
Can¡¯t find the electronic sch¨¦matic. I even bought the 8558- 90043 version from Artec Manual, but it¡¯s not the right schematic.
it's alwaws a more recent diagram. (see picture no4)
If you have the diagram...>>> i would be happy
Some help please
cdt
cdt
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I was trying to figure out why I instinctively was so sure that
the DC and OHMs cables were coaxial, and I took a look at them.
I can easily see the braid texture through the outer plastic sheath,
and they are much stiffer than the ground lead, which feels just
like soft rubber test lead cable.
So, yes, both the grey DC lead, and the red OHMs/Amps leads are coax.
-Chuck Harris
n4buq wrote:
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I took a quick look last night and, yes, the DCV lead is a shielded cable on mine as well.
As for the OP, I suppose if banana jacks are employed, then one could also make the DCV lead with, perhaps, a BNC on one end and use one of those Pomona (or equivalent) banana to BNC adapters (provided the spacing is compatible).
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "mill_glen_chevy via groups.io" <brstpr@...>
To: [email protected]
Sent: Saturday, February 27, 2021 9:23:01 AM
Subject: Re: [HP-Agilent-Keysight-equipment] 410C probe leads
I'm looking at mine now.? It's part of the lead.? I think bandersontv on
YouTube showed that the shield is grounded to the outside of the probe as
well.? I'll have to make a probe since this one is missing.
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Jeremy Nichols
Mike Vande Voort
Gerard
