I ended up finding a 432A for sale on ebay that included a 478A coaxial thermistor mount. It's in great shape (even still has both feet), but appears to have lost the little screw for mechanically zeroing the meter.
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Re: Correct rack mount bracket?
On Wed, Apr 10, 2019 at 03:13 PM, Jeremy Nichols wrote:
Is eBay item number:173844545405 the correct rack mounting bracket for my HP-3456A DVM? All these "with handles" and "without handles" descriptions are confusing (if the sellers are even correct).
?
Jeremy
?
As I understand it, the thinner instruments such as the 3455/56 voltmeters are 2U, with two screws. Most others are 3U. Really large ones such as the 8664 sig gen and the 8569 spectrum analyzer are 4U. I think what's pictured are indeed 2U rack ears, but you should confirm the measurements. Sean
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Re: Correct rack mount bracket?
Jeremy, Yes, those ears will fit a 3456A. They are definitely for use without handles. The ones for use with handles remaining attached have a notch at top and bottom to clear the handles. You will have to remove the handles to use the ones on offer. Note that the screws to mount the ears to the unit don’t appear to be included. The flathead screws that mount the handles are not long enough to use to mount the ears. You’ll also need either a shelf for the unit to sit on or the side mounted slides. The rack mount ears and front frame of the DVM are not designed to support the weight of the unit.?
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Show quoted text
On Apr 10, 2019, at 5:13 PM, Jeremy Nichols < jn6wfo@...> wrote: Is eBay item number:173844545405 the correct rack mounting bracket for my HP-3456A DVM? All these "with handles" and "without handles" descriptions are confusing (if the sellers are even correct).
Jeremy
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Re: Plastic snap-in bottom feet
Not sure about part numbers, but some of them were all plastic?+ metal legs, and others were plastic?+ rubber surface grip + metal legs.
On Tue, Apr 9, 2019 at 7:26 AM Paul Bicknell < paul@...> wrote: Hi
The larger unites used 5 of the small feet
Another type for the 1/3 units? such as a 432 power
Another type for the 1/2 units? such as a 431 power
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Steve
Sent: 09 April 2019 14:39
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Plastic snap-in bottom feet
As I look around the internet at the plastic snap-in bottom feet used on
older HP test equipment, I run into two HP part numbers: 5041-8821 and
5041-9167.
How do the feet differ between the two part numbers? Perhaps color? Or
something else?
Thanks.
Steve, K8JQ
-----
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
|
Correct rack mount bracket?
Is eBay item number:173844545405 the correct rack mounting bracket for my HP-3456A DVM? All these "with handles" and "without handles" descriptions are confusing (if the sellers are even correct).
Jeremy
|
Re: HP 3325A - Help with photos of Option 002 PCB?
I have been looking for the Hi-volt option ( 100v out ) for the Hp 3245A universal source if anyone has information.
That will be a simpler layout that the 3325A? Hi-volt option for it uses a Hi-Volt opamp.
You might look into that design.
George
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Re: HP8340B Attenuator Verification and Cal software
I just spent several hours trying to make a usable copy of the
8340BCAL.imd file from the files section. Constant data errors
reported by ImageDisk, despite spending time reading the
documentation and trying every combination of settings.
If the original disk is available I'm happy to pay for a copy, or
pay a security deposit, make true copies on an HP system, and
return the original.
Steve
On 1/29/2019 6:09 PM, peter bunge
wrote:
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I have 08340-90336 Vol2 and 08340-90307 if they
are any use.?
Are they already in the Files? PeterB
Does anyone have a copy
of the 8340B attenuator calibration and operation
verification test software, part number 08340-10009 they
could share? I’ve tried all the usual places and have been
watching for it on eBay for two years without success.
Thanks in advance,
Steve
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OT: NLS Series MX-1 digital voltmeter
Hi all,
OT, but I'm hoping someone here might know about this little nixie tube voltmeter from Non-Linear Systems in Del Mar, CA I found at my local surplus store while looking through a stack of (mostly badly beat up) HP power supplies. Haven't had much luck finding out anything about it searching the internet. Hoping to acquire manuals if possible.
I cleaned up the switches and tightened the rod that connects the power switch on the front panel to the actual mains switch at the rear of the case, and it works great!
Feel free to just email me directly and allow the topic to fall down the list.
Thanks!
Sean
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Re: HP 3325A - Help with photos of Option 002 PCB?
Yeah, I'm part of that thread. :)
I have got most of the stuff sorted out and cross referenced, I just need to find a source on short RCA cables with right angle plugs on each end.
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Re: HP 3325A - Help with photos of Option 002 PCB?
Hi,
Looks like others are interested in this project too and already cloned this board.
Szabolcs J. L. Trantham < jltran@...> ezt írta (id?pont: 2019. ápr. 4., Csü 13:35):
I, too, would like some pictures of Option 002. ? Perhaps they can be posted in the Files section. ? Thanks. ? Joe ? From: [email protected] [mailto:[email protected]] On Behalf Of Jared Cabot
Sent: Thursday, April 04, 2019 5:09 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 3325A - Help with photos of Option 002 PCB? ? That would be awesome if you could take a few good photos. :)
I have a source on the power connectors, and the signal connectors look to be just RCA style, so they should be easy to find too.
I think I'll just make a copy of the HP design (substituting parts where needed) to make it easy to get up and running.
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Re: Plastic snap-in bottom feet
Hi
The larger unites used 5 of the small feet
Another type for the 1/3 units such as a 432 power
Another type for the 1/2 units such as a 431 power
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected][mailto: [email protected]] On Behalf Of Steve Sent: 09 April 2019 14:39 To: [email protected]Subject: [HP-Agilent-Keysight-equipment] Plastic snap-in bottom feet As I look around the internet at the plastic snap-in bottom feet used on older HP test equipment, I run into two HP part numbers: 5041-8821 and 5041-9167. How do the feet differ between the two part numbers? Perhaps color? Or something else? Thanks. Steve, K8JQ ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18 Internal Virus Database is out of date.
|
Stuff Day is this saturday at Sphere!
Just a reminder, stuff day is this weekend (saturday) here at Sphere Research Corp. Hope to see? you there, we have a lot of HP goodies (modules, spares and boards) we are giving away to anybody that wants them and is going to show up in person. There are also tons of free parts, and Tek/HP CRTs for just C$10.?
?
Full details are located here: https://www.sphere.bc.ca/test/stuffday.html
?
hope to see you on saturday!
all the best,
walter (walter2 -at- sphere.bc.ca)
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Plastic snap-in bottom feet
As I look around the internet at the plastic snap-in bottom feet used on older HP test equipment, I run into two HP part numbers: 5041-8821 and 5041-9167.
How do the feet differ between the two part numbers? Perhaps color? Or something else?
Thanks.
Steve, K8JQ
|
Re: Power Switch Button for HP 1631D
Dario
Thanks for the offer but I think I will
go with a 3D print.
Mine has broken off right at the end,
probably where yours below transitions from dark grey to light
grey, so I should be able to slide it in from the front. Probably
got broken when someone threw it on to the roadside rubbish
collection where I found it.?
Good work on the forming and thanks
again.
Dave
On 9/04/2019 2:56 am, Dario via
Groups.Io wrote:
toggle quoted message
Show quoted text
Hi Dave
Some time ago, for mine, I redid one using a plastic
profile, folded with hot air, to which I then pasted a button.
It is not the original but it works. I had made one as a spare, if you want I can
send it to you.
 
Dario IU3ARP
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Re: HP8657B doubler issue
It's a small world I guess.
If I had that doubler I might try to reverse engineer it a bit to see if the problem is tractable.? It seems you have no trouble with the doubling circuitry, but the control circuit is messed up.? When the supply dropw, is it due to overload or insufficient available current?? Or perhaps voltage instability.? Lift the appropriate wire and insert a milliammeter.? Without a diagram it's more challenging.
I have a similar problem with a 3455A voltmeter.? It works great excapt it won't switch into 4 wire Ohms mode.? I have the cover off and am trying to see how that works.? I think there are relays involved so I might look for a burnt out relay driver or a bad connection.? It could also be a logic problem, and if so I am out of luck.
Bob
On Monday, April 8, 2019, 1:44:10 PM PDT, Ted Cuff <tcuff65@...> wrote:
I think that was my post on EEVBlog. :)
On Sat, Apr 6, 2019, 12:26 PM Bob Albert via Groups.Io <bob91343= [email protected]> wrote:
I suggest you go to EEVblog and connect with a guy there who has what seems to be the same issue.
As you probably know, HP has no available information on the innards of the doubler.? I repaired mine but it had a different problem.? The factory, even when it was supporting the unit, required that the doubler be returned to the factory for repair or replacement.? I don't know how much they charged for that but I suspect it would have been well over $1000, since the whole generator went for something like $13k.
I think this guy already tried relacing the regulator.? Anyway perhaps between you two a solution can be found.
Bob
On Saturday, April 6, 2019, 6:02:34 AM PDT, < tcuff65@...> wrote:
I read through a lot of the posts on the 8657b doubler issues, but haven't found any ideas that match my issue.
I seem to have the same issue VE2ZAZ had with his.
When my doubler acts up, a red led lights up inside the doubler, and the -5.2v supply gets loaded down.
Then after a little bit, the led goes out and the -5.2v supply recovers, and all is well again.
There is a power resistor by the 723 regulator that has overheated some.
I'm guessing that the led is tied to that regulator somehow.
But I have no idea where to begin with no service data available.
Also, is the 38v supply only for the doubler as well?
Thanks for any help.
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Re: Need original Service Manual of 8970B Noise Figure Meter
Glenn & ALberto
Thanks for the plug? and while our manual has 600 dpi large size scans of the schematics etc, it is unfortunately for 26xxA and 27xxA serial number units , may be useful for some boards, not for others his unit is31xx which is 4 years later production
Dave
manuals@...
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Show quoted text
On 4/8/2019 3:22 PM, Glenn Little wrote: Artek has the scan of both the operator and service manual for $15.00 USD.
His quality is excellent.
73
Glenn
WB4UIV
On 4/8/2019 11:17 AM, Alberto, IZ2EWV wrote:
Hello friends,
I live in Italy (for the scope of the help I'm going to ask...) and own a hp 8970B Noise Figure Meter and the only copy of its Service Manual (standard version, up to 1600 MHz - for S/N prefixed 3106A and above) that I found in the Web is poor - surely scanned from a copy:
* block and schematic diagrams of larger size are scanned in
pieces, but the left/right sides are missing;
* too dark photos cannot show the tagged parts;
* too light pictures of the PCBs cannot show the tracks in
transparency.
I ask if anybody could send me a good copy of the Service Manual or borrow me an original paper folder, which I could scan by myself. Obviously, I would pay for round trip shipping.
Thank you in advance,
Alberto, IZ2EWV --
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIVwb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
--
Dave
Manuals@...
www.ArtekManuals.com
|
Re: HP8657B doubler issue
I think that was my post on EEVBlog. :)
On Sat, Apr 6, 2019, 12:26 PM Bob Albert via Groups.Io <bob91343= [email protected]> wrote:
I suggest you go to EEVblog and connect with a guy there who has what seems to be the same issue.
As you probably know, HP has no available information on the innards of the doubler.? I repaired mine but it had a different problem.? The factory, even when it was supporting the unit, required that the doubler be returned to the factory for repair or replacement.? I don't know how much they charged for that but I suspect it would have been well over $1000, since the whole generator went for something like $13k.
I think this guy already tried relacing the regulator.? Anyway perhaps between you two a solution can be found.
Bob
On Saturday, April 6, 2019, 6:02:34 AM PDT, < tcuff65@...> wrote:
I read through a lot of the posts on the 8657b doubler issues, but haven't found any ideas that match my issue.
I seem to have the same issue VE2ZAZ had with his.
When my doubler acts up, a red led lights up inside the doubler, and the -5.2v supply gets loaded down.
Then after a little bit, the led goes out and the -5.2v supply recovers, and all is well again.
There is a power resistor by the 723 regulator that has overheated some.
I'm guessing that the led is tied to that regulator somehow.
But I have no idea where to begin with no service data available.
Also, is the 38v supply only for the doubler as well?
Thanks for any help.
|
Re: Need original Service Manual of 8970B Noise Figure Meter
Artek has the scan of both the operator and service manual for
$15.00 USD.
His quality is excellent.
73
Glenn
WB4UIV
On 4/8/2019 11:17 AM, Alberto, IZ2EWV
wrote:
Hello friends,
I live in Italy (for the scope of the help I'm going to ask...)
and own a hp 8970B Noise Figure Meter and the only copy of its
Service Manual (standard version, up to 1600 MHz - for S/N
prefixed 3106A and above) that I found in the Web is poor - surely
scanned from a copy:
- block and schematic diagrams of larger size are scanned in
pieces, but the left/right sides are missing;
- too dark photos cannot show the tagged parts;
- too light pictures of the PCBs cannot show the tracks in
transparency.
I ask if anybody could send me a good copy of the Service Manual
or borrow me an original paper folder, which I could scan by
myself. Obviously, I would pay for round trip shipping.
Thank you in advance,
Alberto, IZ2EWV
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
|
Re: Power Switch Button for HP 1631D
Hi Dave Some time ago, for mine, I redid one using a plastic profile, folded with hot air, to which I then pasted a button. It is not the original but it works. I had made one as a spare, if you want I can send it to you.
 
Dario IU3ARP
|
Re: Need original Service Manual of 8970B Noise Figure Meter
Thank you Siggi,
I just asked them, in order to know about the quality of the manual. Il giorno 08 apr 2019, alle ore 19:02, Siggi < siggi@...> ha scritto:
Hey Alberto,
looks like Artek Manuals has a scan (). Maybe you should hit them up for a copy?
Regards, Siggi On Mon, Apr 8, 2019 at 12:11 PM Alberto, IZ2EWV < iz2ewv@...> wrote: Hello friends,
I live in Italy (for the scope of the help I'm going to ask...) and own a hp 8970B Noise Figure Meter and the only copy of its Service Manual (standard version, up to 1600 MHz - for S/N prefixed 3106A and above) that I found in the Web is poor - surely scanned from a copy:
- block and schematic diagrams of larger size are scanned in pieces, but the left/right sides are missing;
- too dark photos cannot show the tagged parts;
- too light pictures of the PCBs cannot show the tracks in transparency.
I ask if anybody could send me a good copy of the Service Manual or borrow me an original paper folder, which I could scan by myself. Obviously, I would pay for round trip shipping.
Thank you in advance,
Alberto, IZ2EWV
Tnx es 73 deAlberto CalderaraVia Santa Marta, 2620871 Vimercate (MB) - ItalyIZ2EWV?amateur radio stationITU?28?– CQ?15?– WWL?JN45qo
|
Jeremy Nichols
Jared Cabot
Paul Bicknell
Dario