Re: Unknown component on HP1345A monitor
Agree. Probably 20V
Surprised it's not listed.
Mark
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Hi,
Its probably a 2.2uF tantalum capacitor.
Someone else might know for sure.
Regards,
Askild
Hello :)
I had a -15V supply short circuit on the XYZ board of an HP1345A monitor.?
?
I found this to be faulty but it is an unknown component and does not exist on the documentation.
?
It is written on it 9150 20K 225K
?
Can be found on the board 03577-66581.
?
?
THANKS
|
Re: Unknown component on HP1345A monitor
Hi,
Its probably a 2.2uF tantalum capacitor.
Someone else might know for sure.
Regards, Askild
Hello :)
I had a -15V supply short circuit on the XYZ board of an HP1345A monitor.?
?
I found this to be faulty but it is an unknown component and does not exist on the documentation.
?
It is written on it 9150 20K 225K
?
Can be found on the board 03577-66581.
?
?
THANKS
|
Re: Mating APC 3.5 with APC 2.92 connectors
Alright, I can’t resist:
With China, you get what you pay for. Sometimes you pay (extra) for quality you don’t get, but expected when you paid a premium.
All that said, part of the problem is either failure to force someone to adhere to tolerances and/or failure to reject the parts.
The other part is that something may look correct, and have the incorrect metallurgy, or had process changes without informing the customer.
My dad worked for a major HVAC company and their supplier initially rough machined, heat treated and finish ground motor shafts. As I recall, he told me that they deleted either the rough machine, heat treat or possibly both. Anyway, after a
few hundred motor starts the shafts started buckling internally, until the motor stator and armature made contact. It cost them a pile of money for school bus size rooftop units on large buildings to pay the warranty claims and it would’ve been much cheaper
to do before installation.
In stuff that’s a little more high tech, cutting corners might mean skipping electroless nickel diffusion barriers that keep precious metal coatings from diffusing into the substrate or plating less than the require thickness resulting in peeling,
or failing to live up to the number of connector mating cycles or intermittent contacts.
?If you need three nines quality, that means taking 13 random samples out of 1000 and having zero fail to meet specifications.
The thing is people do that less and less.
With the issue of SMA/3.5/2.92 connectors, since the tolerance is plus nothing minus (a half thousandth or something like that I’d have to check) on the center pin a go/no go gauge is really needed or perhaps a microscope and a straight edge
that can be check for light passing under a microscope.
I’ve also seen sma female sockets with the center above the Teflon or the Teflon itself proud. Again plus nothing minus something small.
Under and over side pins are probably harder to detect without a specific purpose made gage.
Silver lining, buckling from a pin sticking out too far is probably far more likely than spreading a contact that if not mated too many time, will last a while.
Ugly side of 3.5/2.92 connections….the biscuit supporting the center pin may allow a connector saver to transmit the thrust from a pin that’s too long.
YMMV
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Tam -
Interesting use of Decade - spoken lie a true engineer :-)
Cheers!
Bruce
Quoting Tam Hanna <tamhan@...>:
> China is easy to misunderstand. Sadly, I am not allowed by NDA with?
> a client to go into detail.
>
>
> Let me ONLY say that - while bashing the Chinese gets you brownie?
> points with the good looking Conservative girl down the road, and?
> pisses off the libz, you are dealing with an ancient civilization?
> which, until about 100 years ago, could and did easily rebuff offers?
> from Western powers. Then the century of shame came, but now they?
> are back again to the normal status.
>
>
> The Chinese are a deeply manufacturing oriented civilization, are?
> 1.2 billion strong in manpower, with a Conservative government and?
> no social decay. For them, manufacturing and trade of durable goods?
> is the core of civilization. By numbers alone, even if they were a?
> decade stupider, the sheer amount of more men would be enough to?
> ensure that they still have an equal absolute number of great?
> engineers to the USA. And to be clear there is no evidence of the?
> Chinese being stupider at all.
>
>
> Plus, their social order and culture means that they work together?
> more efficiently by and large. Do not let Conservative pundits?
> misguide you - OK, face orientation MAY lead to minimal?
> inefficiencies, but the otherwise higher work ethic compensates for?
> that. It is like a very fast one handed cigar roller, and a decently?
> fast two handed one.
>
>
> To my Conservative brothers: feel free to - misguidedly - hate the?
> Chinese. I incidentally still wait for someone to show me on the?
> doll, where the Chinese hurt him. But ignore them at your peril.
>
> I type this in English, but if I had a son, he would learn Chinese.
>
>
> Tam
>
>
>
> On 2023. 03. 03. 20:04, Dave McGuire wrote:
>> On 3/3/23 13:44, Martin Rickes wrote:
>>> Calma chicos :) there's no need for inappropriate language here.
>>
>> ? There certainly isn't.? And I'm sure that wasn't appreciated by?
>> any of the respected, educated engineers here who happen to be Asian.
>>
>> ? We are unified here by the purity of engineering, and common?
>> interests, passions, and professions.
>>
>> ???????????? -Dave
>>
> With best regards
> Tam HANNA
>
> --
> Enjoy electronics, 3D printing and cigars? Join more than 21000?
> followers on my Instagram at
>
>
>
>
|
Unknown component on HP1345A monitor
Hello :)
I had a -15V supply short circuit on the XYZ board of an HP1345A monitor.?
?
I found this to be faulty but it is an unknown component and does not exist on the documentation.
?
It is written on it 9150 20K 225K
?
Can be found on the board 03577-66581.
?
https://archive.org/details/HP1345AOSM1985
?
THANKS
|
Re: Mating APC 3.5 with APC 2.92 connectors
Tam -
Interesting use of Decade - spoken lie a true engineer :-)
Cheers!
Bruce
Quoting Tam Hanna <tamhan@...>:
toggle quoted message
Show quoted text
China is easy to misunderstand. Sadly, I am not allowed by NDA with a client to go into detail.
Let me ONLY say that - while bashing the Chinese gets you brownie points with the good looking Conservative girl down the road, and pisses off the libz, you are dealing with an ancient civilization which, until about 100 years ago, could and did easily rebuff offers from Western powers. Then the century of shame came, but now they are back again to the normal status.
The Chinese are a deeply manufacturing oriented civilization, are 1.2 billion strong in manpower, with a Conservative government and no social decay. For them, manufacturing and trade of durable goods is the core of civilization. By numbers alone, even if they were a decade stupider, the sheer amount of more men would be enough to ensure that they still have an equal absolute number of great engineers to the USA. And to be clear there is no evidence of the Chinese being stupider at all.
Plus, their social order and culture means that they work together more efficiently by and large. Do not let Conservative pundits misguide you - OK, face orientation MAY lead to minimal inefficiencies, but the otherwise higher work ethic compensates for that. It is like a very fast one handed cigar roller, and a decently fast two handed one.
To my Conservative brothers: feel free to - misguidedly - hate the Chinese. I incidentally still wait for someone to show me on the doll, where the Chinese hurt him. But ignore them at your peril.
I type this in English, but if I had a son, he would learn Chinese.
Tam
On 2023. 03. 03. 20:04, Dave McGuire wrote:
On 3/3/23 13:44, Martin Rickes wrote:
Calma chicos :) there's no need for inappropriate language here. ? There certainly isn't.? And I'm sure that wasn't appreciated by any of the respected, educated engineers here who happen to be Asian.
? We are unified here by the purity of engineering, and common interests, passions, and professions.
???????????? -Dave
With best regards
Tam HANNA
--
Enjoy electronics, 3D printing and cigars? Join more than 21000 followers on my Instagram at
|
Re: Mating APC 3.5 with APC 2.92 connectors
Ah, that's why the HPAK 84904, 84905, and 84906 40 GHz attenuators come with 2.4 mm connectors instead of 2.92 mm K connectors.? And why we have 2.4 mm connectors on Keysight gear at work.? Thanks for the history, Jeff.? ? ? ? ? Jim
Sent from my T-Mobile 4G LTE Device
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-------- Original message -------- From: "Jeff Kruth via groups.io" <kmec@...> Date: 3/3/23 8:44 AM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] Mating APC 3.5 with APC 2.92 connectors
?
Way back when in 1986,when I first purchased 2.92 Connectors from Wiltron ( the inventor, which was why HP did the 2.4, cause they couldnt stand buying connector from their competitor, Wiltron), Wiltron assured me that the 2.92 was backwards compatible to the APC-3.5 and the SMA. Of course, this does not include Chink SMA's as they are crap, but real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda, etc.
J. Kruth
In a message dated 3/3/2023 11:36:00 AM Eastern Standard Time, drkirkby@... writes:
?
On Fri, 3 Mar 2023 at 16:23, Dr. David Kirkby < drkirkby@...> wrote:
?
This might be the paper I was thinking of.?
?
?
No, that wasn’t the paper. There is one giving corrections between 2.92 and 3.5 mm, but ?concludes not to bother trying to correct with SMA.?
--
Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@...Telephone 01621-680100./ +44 1621 680100 Registered in England & Wales, company number 08914892. Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
|
Re: Mating APC 3.5 with APC 2.92 connectors
All I need to say is look up Dean Cheng & Peter Zeihan. China has 5-15 years to collapse. Sorry, demographics dont lie.
J. Kruth
In a message dated 3/3/2023 2:24:23 PM Eastern Standard Time, castellcorunas@... writes:
?
Hi,
I am Dutch, retired and live in Spain, worked long time in France, and shorter times with Universal Voltronics in Mount Cisco in the state of? New York, in several other countries of Europe, and in all countries I've learned something valuable?from local technicians.
I do not own an iPhone, but aren't these proud US phones also made in China as well??
So, calm down and shown some respect please.
Leo Kroonenburg?
|
Re: Mating APC 3.5 with APC 2.92 connectors
Hi,
I am Dutch, retired and live in Spain, worked long time in France, and shorter times with Universal Voltronics in Mount Cisco in the state of? New York, in several other countries of Europe, and in all countries I've learned something valuable?from local technicians.
I do not own an iPhone, but aren't these proud US phones also made in China as well??
So, calm down and shown some respect please.
Leo Kroonenburg?
|
Re: HP 8594A Spectrum Analyzer - garbled Display after 3.6V battery replacement
Hello Christian
Try to follow the Cal restore PDF i just uploaded to the file area under HP8590.
I just had the same issue with a HP8590 after replacing the backup battery and this solved the problem.
Best regards? Johnny
|
Re: Mating APC 3.5 with APC 2.92 connectors
Can't really disagree there.
Let's wrap this topic up now.
-Dave
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Show quoted text
On 3/3/23 14:13, Tam Hanna wrote: China is easy to misunderstand. Sadly, I am not allowed by NDA with a client to go into detail.
Let me ONLY say that - while bashing the Chinese gets you brownie points with the good looking Conservative girl down the road, and pisses off the libz, you are dealing with an ancient civilization which, until about 100 years ago, could and did easily rebuff offers from Western powers. Then the century of shame came, but now they are back again to the normal status.
The Chinese are a deeply manufacturing oriented civilization, are 1.2 billion strong in manpower, with a Conservative government and no social decay. For them, manufacturing and trade of durable goods is the core of civilization. By numbers alone, even if they were a decade stupider, the sheer amount of more men would be enough to ensure that they still have an equal absolute number of great engineers to the USA. And to be clear there is no evidence of the Chinese being stupider at all.
Plus, their social order and culture means that they work together more efficiently by and large. Do not let Conservative pundits misguide you - OK, face orientation MAY lead to minimal inefficiencies, but the otherwise higher work ethic compensates for that. It is like a very fast one handed cigar roller, and a decently fast two handed one.
To my Conservative brothers: feel free to - misguidedly - hate the Chinese. I incidentally still wait for someone to show me on the doll, where the Chinese hurt him. But ignore them at your peril.
I type this in English, but if I had a son, he would learn Chinese.
Tam
On 2023. 03. 03. 20:04, Dave McGuire wrote:
On 3/3/23 13:44, Martin Rickes wrote:
Calma chicos :) there's no need for inappropriate language here. ? There certainly isn't.? And I'm sure that wasn't appreciated by any of the respected, educated engineers here who happen to be Asian.
? We are unified here by the purity of engineering, and common interests, passions, and professions.
???????????? -Dave
With best regards
Tam HANNA
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: Mating APC 3.5 with APC 2.92 connectors
China is easy to misunderstand. Sadly, I am not allowed by NDA with a client to go into detail. Let me ONLY say that - while bashing the Chinese gets you brownie points with the good looking Conservative girl down the road, and pisses off the libz, you are dealing with an ancient civilization which, until about 100 years ago, could and did easily rebuff offers from Western powers. Then the century of shame came, but now they are back again to the normal status. The Chinese are a deeply manufacturing oriented civilization, are 1.2 billion strong in manpower, with a Conservative government and no social decay. For them, manufacturing and trade of durable goods is the core of civilization. By numbers alone, even if they were a decade stupider, the sheer amount of more men would be enough to ensure that they still have an equal absolute number of great engineers to the USA. And to be clear there is no evidence of the Chinese being stupider at all. Plus, their social order and culture means that they work together more efficiently by and large. Do not let Conservative pundits misguide you - OK, face orientation MAY lead to minimal inefficiencies, but the otherwise higher work ethic compensates for that. It is like a very fast one handed cigar roller, and a decently fast two handed one. To my Conservative brothers: feel free to - misguidedly - hate the Chinese. I incidentally still wait for someone to show me on the doll, where the Chinese hurt him. But ignore them at your peril. I type this in English, but if I had a son, he would learn Chinese. Tam On 2023. 03. 03. 20:04, Dave McGuire wrote: On 3/3/23 13:44, Martin Rickes wrote:
Calma chicos :) there's no need for inappropriate language here. ? There certainly isn't.? And I'm sure that wasn't appreciated by any of the respected, educated engineers here who happen to be Asian.
? We are unified here by the purity of engineering, and common interests, passions, and professions.
???????????? -Dave
With best regards Tam HANNA -- Enjoy electronics, 3D printing and cigars? Join more than 21000 followers on my Instagram at
|
Re: Mating APC 3.5 with APC 2.92 connectors
Dave - absolutely agree! IMO we (US) seem to have a bit of a learning problem and have not demonstrated the capability of LONG TERM LEARNING.
Cheers!
Bruce
Quoting Dave McGuire <mcguire@...>:
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Show quoted text
The Chinese make lots of truly excellent stuff. I've had occasion to work with Chinese engineers a few times over the last decade or so, and I've been very impressed.
However, us stupid Americans continue to think "cheaper is better", and so we keep buying bottom-rung crap. The Chinese, like any smart business people, are happy to fill the need.
The Chinese RF engineer that I worked with swore by on Huber-Suhner connectors.
-Dave
On 3/3/23 12:14, Bruce wrote:
Dave -
THANKS - It is simply uncalled for.? And YES some of the Chinese connectors are of poor quality - but part of the reason is that people insist on low prices.? The Chinese do make some excellent quality machine tools.
Cheers !
Bruce
Quoting Dave McGuire <mcguire@...>:
On March 3, 2023 11:44:29 AM "Jeff Kruth via groups.io" <kmec@...> wrote:
Of course, this does not include Chink SMA's as they are crap, but real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda, etc.J. Kruth ? Jeff!? There will be NO (Zero, NADA) racism on this mailing list.
?????????????? -Dave, moderator
--
Dave McGuire, AK4HZ
New Kensington, PA
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: Mating APC 3.5 with APC 2.92 connectors
On 3/3/23 13:44, Martin Rickes wrote: Calma chicos :) there's no need for inappropriate language here. There certainly isn't. And I'm sure that wasn't appreciated by any of the respected, educated engineers here who happen to be Asian. We are unified here by the purity of engineering, and common interests, passions, and professions. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: 87131A / 70340A hpib compatibility
I can remember MarvinTest did sth similar some years ago...they had some HP compatible gens On March 3, 2023 7:21:19 PM GMT+01:00, Ed Marciniak <ed@...> wrote:
Suppose I have an application that is picky and has a list of various supported signal generators. Are there anything that’s strictly compatible, with a subset or superset of commands I might be able to use?
it’s a little awkward because it’s 1-20GHz which isn’t a problem for my needs.
With best regards Tam HANNA -- Enjoy electronics, 3D printing and cigars? Join more than 21000 followers on my Instagram at
|
Re: Mating APC 3.5 with APC 2.92 connectors
The Chinese make lots of truly excellent stuff. I've had occasion to work with Chinese engineers a few times over the last decade or so, and I've been very impressed.
However, us stupid Americans continue to think "cheaper is better", and so we keep buying bottom-rung crap. The Chinese, like any smart business people, are happy to fill the need.
The Chinese RF engineer that I worked with swore by on Huber-Suhner connectors.
-Dave
toggle quoted message
Show quoted text
On 3/3/23 12:14, Bruce wrote: Dave -
THANKS - It is simply uncalled for.? And YES some of the Chinese connectors are of poor quality - but part of the reason is that people insist on low prices.? The Chinese do make some excellent quality machine tools.
Cheers !
Bruce
Quoting Dave McGuire <mcguire@...>:
On March 3, 2023 11:44:29 AM "Jeff Kruth via groups.io" <kmec@...> wrote:
Of course, this does not include Chink SMA's as they are crap, but real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda, etc.J. Kruth ? Jeff!? There will be NO (Zero, NADA) racism on this mailing list.
?????????????? -Dave, moderator
--
Dave McGuire, AK4HZ
New Kensington, PA
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: Mating APC 3.5 with APC 2.92 connectors
Calma chicos :) there's no need for inappropriate language here.
Jeff, it has not much to do with the origin it of the parts. There are certain precision SMAs, yes. But they have a similar price tag like a 3.5
However: A cable assembly from a proper manufacturer, for example a Huber Suhner Minibend is at a price of 30 Euros per piece. Usually they are of superb quality, I have seen and used dozens of them. But, with this price there is only limited resource for inspection, so a ooopsie could get out unnoticed. Now, as the law of maximum damage wants, you will for sure screw this cable into your best signal generator. And that's it for the connector.
Precision cables are always checked in my experience. Side note: I use SMAs (from China) up to 40 GHz in my self made semirigids, but I mechanically measured them with one of this connector measure thingies that look like a clock (sorry don't know the name right now).
But we're drifting off, sorry to have this started.
Tom, again, in my experience even the 2.92 to self made SMA transition did lead to proper figures in the VNA (I have a 8510C at home). So, I would not worry as long as the results do not give suspicion. But you know more than enough about VNAs, I don't need to tell you that :)
Cheers, Martin DL8RI Bruce < bruce@...> schrieb am Fr., 3. M?rz 2023, 18:14:
Dave -
THANKS - It is simply uncalled for.? And YES some of the Chinese?
connectors are of poor quality - but part of the reason is that people?
insist on low prices.? The Chinese do make some excellent quality?
machine tools.
Cheers !
Bruce
Quoting Dave McGuire <mcguire@...>:
> On March 3, 2023 11:44:29 AM "Jeff Kruth via "?
> <kmec=[email protected]> wrote:
>> Of course, this does not include Chink SMA's as they are crap, but?
>> real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda,?
>> etc.J. Kruth
>
>? ?Jeff!? There will be NO (Zero, NADA) racism on this mailing list.
>
>? ? ? ? ? ? ? ? -Dave, moderator
>
> --
> Dave McGuire, AK4HZ
> New Kensington, PA
>
>
>
>
>
|
Re: No IF latch when input 1G signal into HP 5350B
A12 maybe have damaged according to my test ?.? Tonight below test items have been finished:
1. The voltage on A1 test connector can meet manual value .? 2. The value of powers ?input to A12 are all correct .? 3. Some Diagnostics have been implemented . But no failure .
There are only 2 test have ?not been finished , LO and IF signals test , because my SMB to SMA connector not on hand .But i think the result will be bad .
And i start to look for the sampler , so does anyone have the information about HP5350B A12 module for sale ??
Thanks !
---- Replied Message ----
Dear Askild
Thanks for your help ! I am reading service manual now . And one 26.5Ghz spectrum analyzer and one 500Mhz oscillascope are on my hand .? So i think i will check the power ,signal ?according to the manual step by step .
---- Replied Message ----
Hi Samba,
Do you have the service manual? Have you read the trouble shooting section? Please be careful around the sampler, as it is a sensitive device.
I would follow the trouble shooting, and first check the DC voltages for voltage within the required range, and also check for ripple.
Next would be to check the LO signal. Notice this is around 14dBm, so use attenuators. What test equipment do you have? (spectrum analyzer, oscilloscope with 500MHz band with, frequency counter, power meter and so on.)
Regards, Askild
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Show quoted text
On Thu, Mar 2, 2023 at 5:10?PM wlk-0001 < wlk-0001@...> wrote:
Dear All
I need ?some help about HP 5350B . NO IF LATCH led and NOT PHASE LATCHED led are all on when 1Ghz signal input to INPUT 1 connector .? And It can be measured well when 500Mhz signal input to INPUT 2 connector . So i want to know if the GaAs Sampler has damaged and how to check .?
Thanks!
|
87131A / 70340A hpib compatibility
Suppose I have an application that is picky and has a list of various supported signal generators. Are there anything that’s strictly compatible, with a subset or superset of commands I might be able to use?
it’s a little awkward because it’s 1-20GHz which isn’t a problem for my needs.
|
Re: datasheet 1906-0231 on HP8980A
|
Re: Mating APC 3.5 with APC 2.92 connectors
Dave -
THANKS - It is simply uncalled for. And YES some of the Chinese connectors are of poor quality - but part of the reason is that people insist on low prices. The Chinese do make some excellent quality machine tools.
Cheers !
Bruce
Quoting Dave McGuire <mcguire@...>:
toggle quoted message
Show quoted text
On March 3, 2023 11:44:29 AM "Jeff Kruth via groups.io" <kmec@...> wrote:
Of course, this does not include Chink SMA's as they are crap, but real, SMA's made to Mil-spec standards, like OSM,Weinschel, Narda, etc.J. Kruth Jeff! There will be NO (Zero, NADA) racism on this mailing list.
-Dave, moderator
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Dave McGuire
Martin Rickes