Re: Agilent E3640A part needed
Hi
?
Rochester Semiconductor manufacture a large range of
"obsolete" semiconductors and a search of their site reveals that
they indeed continue to make that part.
?
?
Only problem is thet have quite a high minimum order quantity
(MOQ). But they do list a lot of distributors on their website. Maybe one of them can help...
?
de G4LUA
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Re: Agilent E3640A part needed
Hi ? Rochester Semiconductor manufacture a large range of "obsolete" semiconductors and a search of their site reveals that they indeed continue to make that part. ? https://www.rocelec.com/parts/results/all/?s=CS8122+ ? Only problem is the have quite a high minimum order quantity (MOQ). But they do list a lot of distributors on their website. ? de G4LUA This email has been scanned by BullGuard antivirus protection.
For more info visit
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Agilent E3640A part needed
Hi, I have an Agilent E3640A PS with a defective CS8122 voltage regulator. This voltage regulator was fabricated by On Semiconductors and it became obsolete. I've been looking around the internet trying to find this part but I've been unsuccessful so far. I don't have experience with finding replacements for obsolete parts. Can anybody give me a hand on finding a replacement for this part? Thanks in advance. John
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?
Seeing the note on the Fine Tune joint, I wondered if
anyone had ideas on why mine does not seem to tune the Generator?
?
I have opened it up and the joint is still good
and the shaft is turning in the housing but the frequency does not
change.? Turning the knob from end to end is stiff but does turn, just
nothing happens.
?
Setting the frequency with the main tuning knob works just
fine, just not the fine tune..................................
?
?
Any ideas??
?
Chuck
N7UVZ
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I've had two couplers that broke and with both the fine tune mechanism was much stiffer than it should be. Taking them apart at the business end and cleaning and lubricating made them much easier to turn. And a lot less stress on the replacement flexible coupler.
Dan
ac6ao
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Re: [hp agilent equipment] HP-8640B fine tune plastic joint
That sounds like a much simpler idea than the model boat u joint thing I was thinking of.
Jeff
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Re: [hp agilent equipment] HP-8640B fine tune plastic joint
Hello Frank, I replaced my frequency vernier shaft coupling with a piece of small bore, high pressure flexible hosing. I cleaned both shafts with meths, wiped dry, fitted the tubing over the longer shaft, aligned the two ends and then slid the tubing back over the shorter section. I then fastened the tubing in place with two small hose clamps. 73 de Brian, VK2GCE, Brian Clarke BE, MBA, PhD, CPEng, FIEAust MD, Clarke & Associates P/L
On Sat, 24 Oct 2015 14:24:25 +0200, you asked:
Email sent using Optus Webmail
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HP 856X SA with 11970 series external mixers
Hi,
I have an HP 8563E spectrum analyzer that I use with the 11970 series of un-preselected external mixers. It has Firmware Revision 940622 installed.
According to the manual for the 11970 mixers, in order to use the Signal Identification function, you must either have Firmware Revision less than or equal to 920528 or else have Option 008. So it appears that, for some reason, HP removed this function from later versions of the 856X series of SAs. And my 8563E lacks Option 008.
Absent the Signal Identification function, does anyone know of a way to identify spurious signals when using the 11970 series of external mixers?
Thanks!
Ray Perrin VE3FN
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WG: Re: Problem with 3MHz Filter in IF Section 8552B
? Obviously I had done something wrong with uploading pictures. But now it worked:
Span for screen shot is 0,2MHz/Div. ? I think I have located the problem to L2/C2 which cannot be tuned to a definite maximum. I will desolder and measure the parts. ? Regards Ernst ? ? ?
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Re: Where to find EZGPIB?
Hello,
since a few days, the website is online again with the original content.
Best regards,
Hartmut
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Re: HP-8640B fine tune plastic joint
I think saw a YouTube video on this repair.?
-Kelly
On Saturday, October 24, 2015 7:25 AM, "'Thomas S. Knutsen' la3pna@... [hp_agilent_equipment]" wrote:
?
Model building stores have flexible coupling joints for engine axles and such that works great as replacement for the orginal joint.
BR. Thomas
?
Hi all,
does anyone have a clever idea on how to replace that stupid little
flexible plastic joint on the fine frequency tune shaft? I'm not even
going to dream about gluing the two broken parts together, joint
surface is so small that I think it's a miracle that it holds at all
from the beginning.
Thanks in advance.
Frank IZ8DWF
-- ?Please? avoid sending? me? Word? or? PowerPoint? attachments. ?See? <> PDF is an better alternative and there are always LaTeX!
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RESTORING HP 8160A HELP w/ ROM IMAGE - HINTS
hello, I am restoring a 8160A if someone has the ROM image (use uprocess MC6809) and can send the file ... The ROM image of the older model (7 ROMs use the MC6800 uprocess) would also be useful. Any other maintenance tip of this equipment would be welcome.
Thank you in advance to all colleagues ..!
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HP 182C scope parts needed
Hi guys looking for a HV board? or just a T1 inverter transformer? my one is O/C Dave GM3WIL
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8720B Option 003 Extended Dynamic Range
Hi
I would like to install option 003 in my 8720B. I understand that this entails adding a 6dB Att in the main arm of the port 2 coupler to the sampler. Does anyone have any more information or a copy of the field installation instructions? I have the Keyword.
Thanks, Kevin
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8720B Option 003 Extended Dynamic Range
Hi
?
I would like to install option 003 in my 8720B.
?
I understand it entails adding a? 6dB Att in the main arm
of the port 2 coupler to the sampler.
?
Does anyone have a copy of the field installation instructions?
?
Thanks, Kevin
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Re: HP 8341A power supply schematics
Thanks Dennis, this link help me perfectly , I am now in search of the 24 pin HP extender to troubleshoot the A52 power supply board. Any help will greatly appreciated
73's from Belgium ON1EV GUY
Le Vendredi 23 octobre 2015 23h16, "Dennis Czelusniak czelusniakd@... [hp_agilent_equipment]"
?
I will not stand on my head for this one but I have a suspicion the 40 and 41 supplies are the same.
>>> http://literature.cdn.keysight.com/litweb/pdf/08340-90245.pdf?id=809483 <<<
Link to 8340B power supply drawing is much clearer than the 8341A drawing.
Dennis
--------------------------------------------
On Fri, 10/23/15, on1ev@... [hp_agilent_equipment] wrote:
Subject: [hp_agilent_equipment] HP 8341A power supply schematics
To: hp_agilent_equipment@...
Date: Friday, October 23, 2015, 2:29 PM
HI, all the HP lovers, I have received an HP 8341A
with a bad? power supply , +12 V is missing as well the
+5.2 V ,the schematics and the flowchart as an aid to
troubleshoot the power supply?available on the web are
unreadable .Is there a good soul with
decent schematic to help me ?please sent
it to ONE1V at yahoo.fr.Best
regardsON1EVGuy
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Re: HP-8640B fine tune plastic joint
Model building stores have flexible coupling joints for engine axles and such that works great as replacement for the orginal joint.
BR. Thomas
?
Hi all,
does anyone have a clever idea on how to replace that stupid little
flexible plastic joint on the fine frequency tune shaft? I'm not even
going to dream about gluing the two broken parts together, joint
surface is so small that I think it's a miracle that it holds at all
from the beginning.
Thanks in advance.
Frank IZ8DWF
-- ?Please? avoid sending? me? Word? or? PowerPoint? attachments. ?See? <> PDF is an better alternative and there are always LaTeX!
|
HP-8640B fine tune plastic joint
Hi all,
does anyone have a clever idea on how to replace that stupid little
flexible plastic joint on the fine frequency tune shaft? I'm not even
going to dream about gluing the two broken parts together, joint
surface is so small that I think it's a miracle that it holds at all
from the beginning.
Thanks in advance.
Frank IZ8DWF
|
Re: Help with HP 8657B Signal Generator
Thanks for the caveats.? Actually I was concerned about many of those same issues.? I still would like to fool around with GPIB but I will wait on that.? Even at around $50 it wouldn't be cost effective for my desires, which are only to get acquainted with the bus and see what I can figure out to do with it.? I never was much of a digital guy but the technology has so much digital in it these days that I might as well bite the bullet and see what I can learn.
As for my sweep generator requirement, it's been solved in an entirely different manner, not using the HP generator at all, but a spectrum analyzer with a tracking generator.? The generator does the sweeping and the analyzer detects the filter output.
I am learning how to make the SA do some of the things I didn't realize it could do, and am very happy to have it.
My 8657B still needs work; it won't put out the full voltage in the spec, and when I command any output voltage above, say, 500 mV, I get distortion instead.? I don't need that much signal yet it would be cool if I could fix it.
Additionally, there is an output for a spectrum display on my Kenwood transceiver but nothing much seems to come out of it.? Nowhere in the documentation is that signal described.? I have another unit like it and it's the same way.
So many projects, so little time.? And electronics is by no means my only hobby...
Bob
On Friday, October 23, 2015 8:27 PM, "Bob Bownes bownes@... [hp_agilent_equipment]" wrote:
Bob,
Beware of a number of factors in doing what you're trying to do.?
1) As others have mentioned you will not actually get a smooth sweep. You are getting frequency as a step function with settling time in between steps. The settling time between steps can be quite significant and can introduce quite a few artifacts that will dramatically impact your measurements.?
2) Not only will the step function settling time impact the frequency output but the power as well. Sweepers are designed to keep a constant output amplitude while sweeping across the chosen range. A really good one will even let you choose between unlevelled, internal leveling, and using an external power sensor to level the output. The last lets you remove the attenuation curve of the cable and other bits between the sweeper and the DUT.?
You get what you pay for in an HPIB to USB adapter. The low-cost adapters quite frequently simply do not work and/or do not have the same command that as the more professional ones.?
When you use an actual sweep generator, you can frequently get a voltage which is proportional to frequency out of the back of the instrument. This can be used to coordinate your sweep with other instruments. In fact, if you have as an RF power sensor, a sweep generator, and an oscilloscope, you can build a simple network analyzer that can be used to tune those bandpass filters.?
On Sep 25, 2015, at 22:40, Bob Albert bob91343@... [hp_agilent_equipment] < hp_agilent_equipment@...> wrote:
?
That looks great!? So the next step for me is to get a HPIB interface.? I see one on ebay for about $40 so if I use that software with it I should have a sweep generator.? What do you think?
Bob
? | ? | | ? | ? | ? | ? | ? | US $39.99 New in Business & Industrial, Electrical & Test Equipment, Test Equipment | | | Preview by Yahoo | | ? |
This program from Lance Lascari ( ) should work on the 8657B. ? -- john, KE5FX ? ? ? I was hoping to program it to step frequency between certain limits, automatically, so I can see the frequency and amplitude on an oscilloscope, much as you'd do with an ordinary sweep generator.? This would enable me to adjust the bandpass filters on my ham transceiver, for instance.? Going from point to point isn't a good way, too time consuming and too hard to see the overall effects of each adjustment. A sweep generator of decent quality is an expensive affair.
|
Re: Help with HP 8657B Signal Generator
Bob,
Beware of a number of factors in doing what you're trying to do.?
1) As others have mentioned you will not actually get a smooth sweep. You are getting frequency as a step function with settling time in between steps. The settling time between steps can be quite significant and can introduce quite a few artifacts that will dramatically impact your measurements.?
2) Not only will the step function settling time impact the frequency output but the power as well. Sweepers are designed to keep a constant output amplitude while sweeping across the chosen range. A really good one will even let you choose between unlevelled, internal leveling, and using an external power sensor to level the output. The last lets you remove the attenuation curve of the cable and other bits between the sweeper and the DUT.?
You get what you pay for in an HPIB to USB adapter. The low-cost adapters quite frequently simply do not work and/or do not have the same command that as the more professional ones.?
When you use an actual sweep generator, you can frequently get a voltage which is proportional to frequency out of the back of the instrument. This can be used to coordinate your sweep with other instruments. In fact, if you have as an RF power sensor, a sweep generator, and an oscilloscope, you can build a simple network analyzer that can be used to tune those bandpass filters.?
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Show quoted text
On Sep 25, 2015, at 22:40, Bob Albert bob91343@... [hp_agilent_equipment] < hp_agilent_equipment@...> wrote:
?
That looks great!? So the next step for me is to get a HPIB interface.? I see one on ebay for about $40 so if I use that software with it I should have a sweep generator.? What do you think?
Bob
? | ? | | ? | ? | ? | ? | ? | US $39.99 New in Business & Industrial, Electrical & Test Equipment, Test Equipment | | | Preview by Yahoo | | ? |
This program from Lance Lascari ( ) should work on the 8657B. ? -- john, KE5FX ? ? ? I was hoping to program it to step frequency between certain limits, automatically, so I can see the frequency and amplitude on an oscilloscope, much as you'd do with an ordinary sweep generator.? This would enable me to adjust the bandpass filters on my ham transceiver, for instance.? Going from point to point isn't a good way, too time consuming and too hard to see the overall effects of each adjustment. A sweep generator of decent quality is an expensive affair.
|
Brian
bownes