¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
  2. Messages
Expanded Topics Messages
Date
Re: Book on Hp

 

Bill I think I know that telco supplier. Comments are accurate.
Yes HP and the others we know have gone away. Especially the research that delivered great equipment. But everything moves on.
I enjoy the HP history and the great gear I have picked up for pennies per pound. It all works with a?bit of TLC and help from folks on lists like this.
Regards
Paul.
Re: HP8562A Errors 304,335,317,333

 

¿ªÔÆÌåÓý

The Configuration is a voltage doubler directly coupled on the 60khz switch mode transformer. It is a well known failure that the capacitor goes open. Ofthen with cap getting bulky. Change it to a good 220uF Cap. this will work.
best regards Peter OZ1LPR

Fra: [email protected] <[email protected]> p? vegne af Stephen Hanselman <kc4sw.io@...>
Sendt: 21. april 2020 18:28
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333
?

I assume that the C301 is connected to the top of the transformer that the lower CR304 is connected.? They are coupling some of the AC from the transformer up to CR301/CR302. I don¡¯t work on doublers very much but that¡¯s what the diode configuration would suggest.? I¡¯m not sure what the +28 is used for but it won¡¯t be very much current and C301 being wonky will keep this circuit from working.

?

Steve

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: Tuesday, April 21, 2020 7:59 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

hello i think it is to galvanize isolate that supply. But it is exact the cap. I bet it is open. just use a 220uf i do that all the time to bring it back.

let me know once you tried

best regards Peter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 21. april 2020 16:54
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Peter,

?

Have a 2nd PSU to remove and use as Test components.

One quick question?

?

What type of PSU is this never seen this type of config before!

?

?

?

There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty).

Is this a voltage doubling circuit , not sure?

?

Cheers,

Stu.

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 17 April 2020 21:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent.

PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU.

best regards Peter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 17. april 2020 15:40
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Would Like to say Good news but?

?

Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there.

?

Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply.

?

Can the PSU work standalone, or is it load conscious?

?

Stu.

?

?

?

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 17 April 2020 09:51
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue.

If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz.

best regards Peter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 17. april 2020 10:04
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Peter,

?

Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct?

Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source.

Correct me if I¡¯m wrong.

?

I still think something burn¡¯t out although th PSU looks clean.

Just prepping up before getting My hands dirty..

?

Stu.

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 16 April 2020 20:34
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz.

Reason why you can?t measure anything is because the 600Mhz is used for third mixer.

best regards PEter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 16. april 2020 17:33
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Peter,

?

Which board are we talking about ?

Still looking for the LED PSU indicators on the A2 card.

?

Presume you are referring RF board..?

Is this an off the shelf part or HP proprietary?

?

Thanks,

?

Stu.

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 16 April 2020 06:59
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad.

I believe Harke has a Hp85629A TAM for sale.

best regards Peter Hansen

?

Fra: [email protected] <[email protected]> p? vegne af Don Bitters via groups.io <donbitters@...>
Sendt: 16. april 2020 06:58
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A.
Don Bitters
Re: Book on Hp

 

One of my favorite rants, modern engineering is all about churning out the minimum kit that a company can sell. HP lost its way long ago, friend of mine worked there on some of the fabulous stuff that HP did, got tossed aside when HP decided the future was in PCs. Curse one exec to Hell, you can guess which one. I just retired after a long telecom career, saw how dysfunctional modern telecom companies are. Don't believe any press you hear, we now protect bloated companies that forgot how to innovate years ago. It constantly amazes me how great the instruments are we can now get for a song (well, given a rational seller) are. I think my 54542A is just stunning. 2 Gs/sec simultaneous on 4 chans? Just wow. Before I quit and retired from a big telecom company, no name, but they are in Sweden :) I was stunned at how there was zero involvement with customers as to needs, all needs determined by 'architecture working groups', i.e, people that couldn't actually do anything useful, but could pontificate endlessly about 'how things should be done', with no experience to justify that. Oh well, end of rant.
Re: Seeking Spring Nuts for Series 1 cabinet

 

Forgot to say,
740B is Original "series I"
Re: Book on Hp

 

"Soul of a New Machine" was a great book.

Started reading it at lunch hour at college. I think in third year. Finished it in one sitting. Skipped?classes till I was done that day.

Changed the direction of? my career from Mechanical?( What my Graduation Paperwork says) to Electronics.
Looking back 35 years it was the best thing I ever did.

Dave
VE7HR


On Tue, Apr 21, 2020 at 11:21 AM n4buq <n4buq@...> wrote:
I'm not an avid book reader but I have read "Soul of a New Machine" (twice as I recall) and I found that book fascinating and kept my attention throughout.? Those guys worked so hard on that project.? I'll bet that even though the hours were unbelievably long, there was a spirit of commitment to get that product out the door that I'd guess is missing in most workplaces nowadays.

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Greg Muir via " <big_sky_explorer=[email protected]>
> To: [email protected]
> Sent: Tuesday, April 21, 2020 1:01:18 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] Book on Hp
>
> I also recommend the following:
>
> ¡°The HP Way: How Bill Hewlett and I Built Our Company¡± by David Packard
>
> ISBN 978-0-06-084579-7
>
> ¡°Bill & Dave¡¯s Memos: A Collection of Bill Hewlett & Dave Packard¡¯s Writings¡±
> edited by Albert Yuen
>
> ISBN 978-1-4243-2781-2
>
> There was also a book published years ago titled ¡°The Soul of a New Machine¡±
> by Tracy Kidder back in 1981 (reprinted in 2000 under ISBN
> 978-0-3164-9197-6) not related to HP but is a very absorbing book about how
> development of an electronic product nearly became a living entity in the
> eyes of the designers as it went through the design process. I highly
> recommend it as well.
>
> Nowadays companies are in the eyes of management simply something to acquire
> to make their company bigger and to reap more profits. Except for the tiny
> entrepreneur the average company no longer has time for management to feel
> like what they put into their products is part of their own being to give
> the best to customers. This was borne out by the theft of the HP name to put
> on cheap jelly bean products of which today¡¯s customers are clueless about
> the actual corporation and founders who put their entire lives into making
> that name so famous from the quality products that they offered.? In those
> days living customers were the focus, not the money that they offered.? The
> money was somewhat of a form of congratulation to tell Bill and Dave that
> they did a successful job and to promote more excellent products to be
> offered in the future.
>
> When I talk to Agilent/Keysight/whatever sales people & engineers I still use
> the HP name which either draws puzzled looks or pointed comments that the
> company is ¡°NOW KEYSIGHT!!¡± Yes, but where did this now-funny-named company
> originate?
>
> Greg
>
>
>
>





--
72 de Dave
VE7HR
Re: Seeking Spring Nuts for Series 1 cabinet

 

HP never called the original modular cases System I but did call the later one System II

Original (System I) had one piece cast alloy side panel frames with continious exposed edge and vinyl coated flat alloy side panel inserts. Front and rear panels were folded flat alloy sheet lacated in slots in the side frame and clamped between them.

System II had one piece cast alloy front and rear panel frames, connected by either two internal side castings (generally on small cases) or 4 corner casting on larger ones. Front an rear panels alloy and held in frame by hidden screws.

See the 1976 catalogue for pictuers of both.

Robert G8RPI.
Re: Series 1 & 2 boxes (was Seeking Spring Nuts for Series 1 cabinet)

 

Hi Dave!
Series One is the 200C, etc, series of rounded corner cabinets that housed Rack mount instruments. The 340 Noise figure meter is an example that comes to mind: A puce cabinet that is held in place by 2 set crews under the front edge that allows the cabinet to slip off and reveal a 19 inch rack panel inside, ready to bolt up. There were smaller instruments like the 200 CD, the 428A clip-on ammeter, 425A DC Microvoltmeter. Othe cases were the 608A-F Sig Gen, 606A/B sig gen, etc.
The series 2 were cases like the 432A power meter and the 8640B sig gen, 8690 sweeper, 141T Spec An, etc. These used the cast aluminum side rails.

Regards,
Jeff

In a message dated 4/21/2020 1:01:13 PM Eastern Standard Time, david_wise@... writes:

??Thank you, Jeff! ?I only need two. ?I'll send you my address off-list.

?

Now I'm confused. ?If I'm Series 2 (cast Al sides), then what was Series 1? ?Is there a cheat sheet, or representative example models?

?

Thanks,

Dave Wise

From: [email protected] <[email protected]> on behalf of Jeff Kruth via groups.io <kmec@...>
Sent: Tuesday, April 21, 2020 9:48 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Seeking Spring Nuts for Series 1 cabinet

I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc?

Jeff

In a message dated 4/21/2020 11:49:16 AM Eastern Standard Time, david_wise@... writes:

The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.

?

These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.

?

The sticking point is the?1/8-inch panel depth.

?

All I can find?are for a 1/16-inch?panel.

?

Got any leads?

?

Thanks,

Dave Wise

?

PS: I think U-style would work as well as J-style.
Re: Book on Hp

 

I'm not an avid book reader but I have read "Soul of a New Machine" (twice as I recall) and I found that book fascinating and kept my attention throughout. Those guys worked so hard on that project. I'll bet that even though the hours were unbelievably long, there was a spirit of commitment to get that product out the door that I'd guess is missing in most workplaces nowadays.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Greg Muir via groups.io" <big_sky_explorer@...>
To: [email protected]
Sent: Tuesday, April 21, 2020 1:01:18 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Book on Hp

I also recommend the following:

¡°The HP Way: How Bill Hewlett and I Built Our Company¡± by David Packard

ISBN 978-0-06-084579-7

¡°Bill & Dave¡¯s Memos: A Collection of Bill Hewlett & Dave Packard¡¯s Writings¡±
edited by Albert Yuen

ISBN 978-1-4243-2781-2

There was also a book published years ago titled ¡°The Soul of a New Machine¡±
by Tracy Kidder back in 1981 (reprinted in 2000 under ISBN
978-0-3164-9197-6) not related to HP but is a very absorbing book about how
development of an electronic product nearly became a living entity in the
eyes of the designers as it went through the design process. I highly
recommend it as well.

Nowadays companies are in the eyes of management simply something to acquire
to make their company bigger and to reap more profits. Except for the tiny
entrepreneur the average company no longer has time for management to feel
like what they put into their products is part of their own being to give
the best to customers. This was borne out by the theft of the HP name to put
on cheap jelly bean products of which today¡¯s customers are clueless about
the actual corporation and founders who put their entire lives into making
that name so famous from the quality products that they offered.? In those
days living customers were the focus, not the money that they offered.? The
money was somewhat of a form of congratulation to tell Bill and Dave that
they did a successful job and to promote more excellent products to be
offered in the future.

When I talk to Agilent/Keysight/whatever sales people & engineers I still use
the HP name which either draws puzzled looks or pointed comments that the
company is ¡°NOW KEYSIGHT!!¡± Yes, but where did this now-funny-named company
originate?

Greg
Re: Book on Hp

 

I also recommend the following:

?

¡°The HP Way: How Bill Hewlett and I Built Our Company¡± by David Packard

ISBN 978-0-06-084579-7

?

¡°Bill & Dave¡¯s Memos: A Collection of Bill Hewlett & Dave Packard¡¯s Writings¡± edited by Albert Yuen

ISBN 978-1-4243-2781-2

?

There was also a book published years ago titled ¡°The Soul of a New Machine¡± by Tracy Kidder back in 1981 (reprinted in 2000 under ISBN 978-0-3164-9197-6) not related to HP but is a very absorbing book about how development of an electronic product nearly became a living entity in the eyes of the designers as it went through the design process.? I highly recommend it as well.

?

Nowadays companies are in the eyes of management simply something to acquire to make their company bigger and to reap more profits.? Except for the tiny entrepreneur the average company no longer has time for management to feel like what they put into their products is part of their own being to give the best to customers.? This was borne out by the theft of the HP name to put on cheap jelly bean products of which today¡¯s customers are clueless about the actual corporation and founders who put their entire lives into making that name so famous from the quality products that they offered.? In those days living customers were the focus, not the money that they offered.? The money was somewhat of a form of congratulation to tell Bill and Dave that they did a successful job and to promote more excellent products to be offered in the future.

?

When I talk to Agilent/Keysight/whatever sales people & engineers I still use the HP name which either draws puzzled looks or pointed comments that the company is ¡°NOW KEYSIGHT!!¡± Yes, but where did this now-funny-named company originate?

?

Greg
Re: Seeking Spring Nuts for Series 1 cabinet

 

¿ªÔÆÌåÓý

??Thank you, Jeff! ?I only need two. ?I'll send you my address off-list.


Now I'm confused. ?If I'm Series 2 (cast Al sides), then what was Series 1? ?Is there a cheat sheet, or representative example models?


Thanks,

Dave Wise

From: [email protected] <[email protected]> on behalf of Jeff Kruth via groups.io <kmec@...>
Sent: Tuesday, April 21, 2020 9:48 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Seeking Spring Nuts for Series 1 cabinet
?
I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc?

Jeff

In a message dated 4/21/2020 11:49:16 AM Eastern Standard Time, david_wise@... writes:

The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.

?

These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.

?

The sticking point is the?1/8-inch panel depth.

?

All I can find?are for a 1/16-inch?panel.

?

Got any leads?

?

Thanks,

Dave Wise

?

PS: I think U-style would work as well as J-style.
Re: Seeking Spring Nuts for Series 1 cabinet

 

¿ªÔÆÌåÓý

??No joy there either. ?McMaster does have one "clip-on nut" for number 6 sheet metal screw and 1/8-inch panel but the throat depth (from bend to hole) is about twice the 3/16-inch I require. ?Fastenal has one "U-type spring nut" but it's?0.040-inch panel and everything else is thousand-dollar minimum?quantity. ?It was the same frustrating story everywhere I looked. ?Either no info, didn't meet spec, or out-of-reach price.


Jeff Kruth comes to the rescue up-thread with a personal stash. ?Thanks, Jeff!


Dave Wise

From: [email protected] <[email protected]> on behalf of ken chalfant via groups.io <kpchalfant@...>
Sent: Tuesday, April 21, 2020 9:15 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Seeking Spring Nuts for Series 1 cabinet
?
Greetings,

How about McMaster Carr or Fastenal?

Worth a shot.

Good hunting!

Ken


On 21Apr, 2020, at 9:49 AM, Dave Wise <david_wise@...> wrote:

The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.

These particular?spring?nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.

The sticking point is the?1/8-inch panel depth.

All I can find?are for a 1/16-inch?panel.

Got any leads?

Thanks,
Dave Wise

PS: I think U-style would work as well as J-style.
Re: Seeking Spring Nuts for Series 1 cabinet

 

I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc?

Jeff

In a message dated 4/21/2020 11:49:16 AM Eastern Standard Time, david_wise@... writes:

The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.

?

These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.

?

The sticking point is the?1/8-inch panel depth.

?

All I can find?are for a 1/16-inch?panel.

?

Got any leads?

?

Thanks,

Dave Wise

?

PS: I think U-style would work as well as J-style.
Re: Book on Hp

 

¿ªÔÆÌåÓý

I did love my coffee and donuts every morning at 10:00, I miss those days

?

steve

?

From: [email protected] <[email protected]> On Behalf Of John Lyles
Sent: Monday, April 20, 2020 11:29 PM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Book on Hp

?

This is an excellent book on the culture of the company when Bill and Dave ran it.

Re: HP K21-5321B Digital Clock

 

¿ªÔÆÌåÓý

Philipp,

?

What is the clock doing/not doing.? I went looking for our manuals and it seems they did not survive the purge.

?

One thing to do as a preventative measure is to look at the row of chips next to the NIXIE tubes.? In between them (I think I¡¯ve got the position right) are resistors.? These are the current limit resistors for the NIXIEs and they get hot enough to burn the board.? We always replace them, installing about a 0.25 in above the PCA.?

?

The circuit for this part is very similar to the display section of the 5327B.?

?

We built a replacement clock that actually remembers who it is when the power is cycled so all of the old stuff got packed.

?

I¡¯ll talk to my partner but I can¡¯t find the spare boards of manuals we used to have

?

Steve

?

From: [email protected] <[email protected]> On Behalf Of Philipp G
Sent: Tuesday, April 21, 2020 1:57 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP K21-5321B Digital Clock

?

Hello,

maybe anybody has a service Manual f¨¹r the K21-5321B Digital Clock.

My clock dosent work the right way. I already tryed swaping ICs but i think that more than one is faulty...

Best regards from Germany

Philipp Gr?mer

Re: new File called App notes

 

First place to look is the PSU caps as always...

Nigel Adams - Marconi Instruments Heritage Collection

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dave Wise
Sent: 21 April 2020 17:34
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes

My 400EL (S/N prefix 949) has succumbed to meter scale rot, but I hooked an analog DC voltmeter to the DC OUTPUT banana jacks on the rear panel. It reads 29mV +/- 1mV of jitter. It drops 1mV when I turn off the overhead fluorescent lights, and 1mV when I put a metal cover over the BNC.

This translates into about 3% of scale with barely perceptible jitter on the 400E, and far below scale on the 400EL.

To my surprise, I didn't see a noise spec in the manual, but what I observed doesn't sound out of line.

I think your instrument is troubled, Jim.

Dave Wise
________________________________________
From: [email protected] <[email protected]> on behalf of Jim Ford via groups.io <james.ford@...>
Sent: Monday, April 20, 2020 8:38 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes

Me, too. I have a 400E and just checked it after not having used it for some time. On the most sensitive range, -60 dB 0.001 V, the needle moves around a fair amount with open input BNC, and if that could be stopped, that would be great.

Or is there something else wrong with mine?

Thanks.

Jim Ford
Re: new File called App notes

 

My 400EL (S/N prefix 949) has succumbed to meter scale rot, but I hooked an analog DC voltmeter to the DC OUTPUT banana jacks on the rear panel. It reads 29mV +/- 1mV of jitter. It drops 1mV when I turn off the overhead fluorescent lights, and 1mV when I put a metal cover over the BNC.

This translates into about 3% of scale with barely perceptible jitter on the 400E, and far below scale on the 400EL.

To my surprise, I didn't see a noise spec in the manual, but what I observed doesn't sound out of line.

I think your instrument is troubled, Jim.

Dave Wise
________________________________________
From: [email protected] <[email protected]> on behalf of Jim Ford via groups.io <james.ford@...>
Sent: Monday, April 20, 2020 8:38 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes

Me, too. I have a 400E and just checked it after not having used it for
some time. On the most sensitive range, -60 dB 0.001 V, the needle
moves around a fair amount with open input BNC, and if that could be
stopped, that would be great.

Or is there something else wrong with mine?

Thanks.

Jim Ford
Re: HP8562A Errors 304,335,317,333

 

¿ªÔÆÌåÓý

I assume that the C301 is connected to the top of the transformer that the lower CR304 is connected.? They are coupling some of the AC from the transformer up to CR301/CR302. I don¡¯t work on doublers very much but that¡¯s what the diode configuration would suggest.? I¡¯m not sure what the +28 is used for but it won¡¯t be very much current and C301 being wonky will keep this circuit from working.

?

Steve

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: Tuesday, April 21, 2020 7:59 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

hello i think it is to galvanize isolate that supply. But it is exact the cap. I bet it is open. just use a 220uf i do that all the time to bring it back.

let me know once you tried

best regards Peter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 21. april 2020 16:54
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Peter,

?

Have a 2nd PSU to remove and use as Test components.

One quick question?

?

What type of PSU is this never seen this type of config before!

?

?

?

There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty).

Is this a voltage doubling circuit , not sure?

?

Cheers,

Stu.

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 17 April 2020 21:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent.

PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU.

best regards Peter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 17. april 2020 15:40
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Would Like to say Good news but?

?

Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there.

?

Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply.

?

Can the PSU work standalone, or is it load conscious?

?

Stu.

?

?

?

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 17 April 2020 09:51
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue.

If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz.

best regards Peter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 17. april 2020 10:04
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Peter,

?

Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct?

Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source.

Correct me if I¡¯m wrong.

?

I still think something burn¡¯t out although th PSU looks clean.

Just prepping up before getting My hands dirty..

?

Stu.

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 16 April 2020 20:34
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz.

Reason why you can?t measure anything is because the 600Mhz is used for third mixer.

best regards PEter

?

Fra: [email protected] <[email protected]> p? vegne af stur_mm via groups.io <stuart.ian.richardson@...>
Sendt: 16. april 2020 17:33
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Peter,

?

Which board are we talking about ?

Still looking for the LED PSU indicators on the A2 card.

?

Presume you are referring RF board..?

Is this an off the shelf part or HP proprietary?

?

Thanks,

?

Stu.

?

From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 16 April 2020 06:59
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad.

I believe Harke has a Hp85629A TAM for sale.

best regards Peter Hansen

?

Fra: [email protected] <[email protected]> p? vegne af Don Bitters via groups.io <donbitters@...>
Sendt: 16. april 2020 06:58
Til: [email protected] <[email protected]>
Emne: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333

?

I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A.
Don Bitters
Re: Book on Hp

 

¿ªÔÆÌåÓý

Greetings,

It IS a fantastic book. ?I have read and reread it.

I have also given several copies away - not just for historical reasons but to show managers how it is possible to create a great company and great working environment.

I am saddened to say that I doubt there will ever be another company like HP was when Mr. Hewlett and Mr. Packard were at the helm.

Regards,

Ken


On 21Apr, 2020, at 12:28 AM, John Lyles <jtml@...> wrote:

This is an excellent book on the culture of the company when Bill and Dave ran it. <Bill and Dave book.jpg>
Re: Seeking Spring Nuts for Series 1 cabinet

 

The ones McMac lists are not designed to be used on 1/8" thick panels, but for thinner sheet metal.? I too would like to find a source for spares, so I'm following this as well.

-Pat

On April 21, 2020 at 12:15 PM ken chalfant <kpchalfant@...> wrote:

Greetings,

How about McMaster Carr or Fastenal?

Worth a shot.

Good hunting!

Ken


On 21Apr, 2020, at 9:49 AM, Dave Wise < david_wise@...> wrote:

The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.

These particular? spring ?nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.

The sticking point is the?1/8-inch panel depth.

All I can find?are for a 1/16-inch?panel.

Got any leads?

Thanks,
Dave Wise

PS: I think U-style would work as well as J-style.


?


?
Re: Seeking Spring Nuts for Series 1 cabinet

 

¿ªÔÆÌåÓý

Greetings,

How about McMaster Carr or Fastenal?

Worth a shot.

Good hunting!

Ken


On 21Apr, 2020, at 9:49 AM, Dave Wise <david_wise@...> wrote:

The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.

These particular?spring?nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.

The sticking point is the?1/8-inch panel depth.

All I can find?are for a 1/16-inch?panel.

Got any leads?

Thanks,
Dave Wise

PS: I think U-style would work as well as J-style.
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