Re: Using the 3440A - Why is the 432A manual asking for 10K isolation resistors
Thanks, @ALM - I don't think this is the case as the book refers to using an RC filter:
to filter out the noise pulses. The actual plug-in for the 3440A from the 432A manual is a 3443A so could there be some sort of capacitive coupling inside the plug that makes this a filter?
TonyG
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Re: 3335A - extender cards
These are all original extender cards for the 3335A, unfortunatly not for sale. Pictures are for the connector numbers, although I think the second one is unreadable. Verstuurd vanaf mijn iPhone
toggle quoted message
Show quoted text
Op 23 sep. 2022 om 21:48 heeft Radu Bogdan Dicher <vondicher@...> het volgende geschreven:
? Well, I rushed my reply, and, mind captive to the context of the rest of the conversation, I thought those are DIYed. Then I realized one bears a visible "hp" logo. Are both of those HP genuine risers?? Radu.? On Fri, Sep 23, 2022 at 12:44 PM Radu Dicher < vondicher@...> wrote: Stijn, Wow, that's some handsome work. I think the third picture depicts the exact riser I am looking for.? Is this available? We can discuss privately if you prefer. Thank you, Radu.?
On Fri, Sep 23, 2022 at 10:16 AM Stijn Nestra < maillist@...> wrote:     Verstuurd vanaf mijn iPhone Op 23 sep. 2022 om 16:45 heeft Radu Bogdan Dicher <vondicher@...> het volgende geschreven:
? Does anyone happen to have information on the correct edge connector that would work for this particular riser/extender? As specific as?possible, part number would be best.? Thank you, Radu.? On Fri, Sep 23, 2022 at 4:38 AM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Dave, There's two (one is for the short assemblies and has RF connectors for the A8 module), and I'm not sure I can point out which one's which, but per SM:? Radu.?
On Thu, Sep 22, 2022 at 8:34 PM Dave Casey < polara413@...> wrote: What's the part number for the card(s) you need? I can check my stash.
Dave Casey
On Thu, Sep 22, 2022 at 7:50 PM Radu Bogdan Dicher < vondicher@...> wrote: Douglas Electronics doesn't have ready-to-go 3335A cards. Not sure I can go custom on these cards for this one project. I have no pricing on that yet (still talking to them), but I can't imagine that path is feasible for a hobbyist project.?
If anyone has files to share to create a PCB for this, that would be fantastic.? Radu.?
You could see if Douglas Electronics are still going in CA.
They offered a large stock of extenders for common pitches/widths.? I bought a bunch and used some as-is, others I modified or cut down to suit particular instruments.? Gave me a very useful result.
|
HP 8642A/8642B Disintegrating Foam
What's the consensus for dealing with the disintegrating foam in an HP
8642A/B? Example images attached. I'm tempted to remove it before it
causes problems. But, I've heard its purpose is to provide airflow
channels and is therefore important for cooling. Last thing I want to do
is cause premature failure from excess component heating. I'm also not
too eager to replace it with other foam that will just disintegrate
somewhere down the line.
Thoughts? How have other people handled this problem?
Thanks,
Matt
|
Re: HP 400E sticky needle
Hi,
Yes, Galva is good tool. It has many examples, to help understand how to use it. It even has a HP 431 scale example, so that should help a lot.
Just scan your original scale, and add it as a background, and construct your scale on top of it. I'm using it on Linux (wine)
Regards, Askild
On Thu, Sep 22, 2022 at 10:49 AM, W6KX wrote:
Is this the program you were referring to?
That's one of them (but not the one I was referring to.) (The Tonnes one cost 55.00USD? for the better version of the progam... the basic version is free, but limited)
I was thinking of F5BU's program called Galva.
AFAIR, they both work under WIndows (I think both are 32 bit programs... so? might require older versions of Windows too.)
I like F5BU's Galva... not only because it is free... but, also because it will draw dials, and potentiometer scales, as well as charts (like a Smith Chart.)
F5BU's program is a kind of 'command interpreter' that requires a little programming akin to something like building a Spice file.
The above two programs are well known... But... If you have a nice laser printer, (or a good inkjet, or good plotter), and the software skills (or are willing to learn the software skills) there are many free (and very good) drawing and plotting programs, the penultimate... I'm supposing to be.. Tex.
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Re: Read frequency list from HP 8510C via HP-IB
"Leonard Schmidt via groups.io" <schmidtleonard@...> writes: Yeah, OUTPFREL is only for reading back a frequency list that you gave it, not a start/stop/count. I struggled with this too and never did figure it out, so when I wrote the HP8510C module for scikit-rf I always just kept track in python before sending the commands to the instrument.
I don't know if you are using python, but if you are, skrf.vi.vna.hp8510c has a few useful abstractions: set_frequency_step() which allows start/stop/npoints with npoints>801, and set_hz() that takes a bag of (possibly >>801) assorted frequencies even if the spacing is mixed / weird. Then two_port() (or .s11, .s21, etc) do the measurements. The returned Network object has both S params and frequencies. No magic is happening for the !=801 point sweeps, it's just breaking down the big sweeps that the 8510 can't handle into little sweeps that it can, it uses the faster FORM2 binary transfer mode and start/stop/n sweeps when it can, it has the correct loop structure to take advantage of 8360 fast-lock, etc. Hope it helps.
Cheers,J
On Saturday, September 10, 2022 at 08:07:32 PM EDT, vk2bea via groups.io <vk2bea@...> wrote:
I looked at the manual and I think my assumption is correct.
At least the HP8510 has a command to read the list segments...? I had to jump through hoops to do it on the 8753 8-( ...? Thanks Leonard and Michael, Yeah I'd misunderstood that command. And thanks for pointing me to scikit - sounds useful. I am using python to control it, but just python-vxi11 at the moment with my E5810. Matt
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Re: Pozidrive screws on HP covers
I agree with you, Ed. That is exactly what I would do.
toggle quoted message
Show quoted text
On 2022-09-23 3:36 pm, Ed Breya via groups.io wrote: I gave up long ago trying to find the "exact right" screws for things, especially the HP mixed English/metric situation on some instruments, and the Pozidrive/Philips/Torx etc heads. I have all the driver types, and just use what fits and works. Those cover retaining screws are a PITA to use anyway - yes, they stay put so don't get lost, but gradually the heads and threads and holes get worn out, and often the clip ring breaks. It's also difficult sometimes to even get a cover installed if it's deformed a little, and you have to fiddle around jamming it into place while working the captive retainer screw.
My recommendation is to forget about the special screw and just keep a supply on hand of regular panhead head English and metric ones in the right thread size and length. Don't even worry about flatheads - regulars work better anyway. Just jam the cover in place, and pick the right screw that fits - done. If you loose it next time, get another.
Ed
--
This email has been checked for viruses by AVG antivirus software.
www.avg.com
|
Re: 3335A - extender cards
Well, I rushed my reply, and, mind captive to the context of the rest of the conversation, I thought those are DIYed. Then I realized one bears a visible "hp" logo. Are both of those HP genuine risers?? Radu.?
On Fri, Sep 23, 2022 at 12:44 PM Radu Dicher < vondicher@...> wrote: Stijn, Wow, that's some handsome work. I think the third picture depicts the exact riser I am looking for.? Is this available? We can discuss privately if you prefer. Thank you, Radu.?
On Fri, Sep 23, 2022 at 10:16 AM Stijn Nestra < maillist@...> wrote:     Verstuurd vanaf mijn iPhone Op 23 sep. 2022 om 16:45 heeft Radu Bogdan Dicher <vondicher@...> het volgende geschreven:
? Does anyone happen to have information on the correct edge connector that would work for this particular riser/extender? As specific as?possible, part number would be best.? Thank you, Radu.? On Fri, Sep 23, 2022 at 4:38 AM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Dave, There's two (one is for the short assemblies and has RF connectors for the A8 module), and I'm not sure I can point out which one's which, but per SM:? Radu.?
On Thu, Sep 22, 2022 at 8:34 PM Dave Casey < polara413@...> wrote: What's the part number for the card(s) you need? I can check my stash.
Dave Casey
On Thu, Sep 22, 2022 at 7:50 PM Radu Bogdan Dicher < vondicher@...> wrote: Douglas Electronics doesn't have ready-to-go 3335A cards. Not sure I can go custom on these cards for this one project. I have no pricing on that yet (still talking to them), but I can't imagine that path is feasible for a hobbyist project.?
If anyone has files to share to create a PCB for this, that would be fantastic.? Radu.?
You could see if Douglas Electronics are still going in CA.
They offered a large stock of extenders for common pitches/widths.? I bought a bunch and used some as-is, others I modified or cut down to suit particular instruments.? Gave me a very useful result.
|
Re: 3335A - extender cards
Stijn, Wow, that's some handsome work. I think the third picture depicts the exact riser I am looking for.? Is this available? We can discuss privately if you prefer. Thank you, Radu.?
On Fri, Sep 23, 2022 at 10:16 AM Stijn Nestra < maillist@...> wrote:     Verstuurd vanaf mijn iPhone Op 23 sep. 2022 om 16:45 heeft Radu Bogdan Dicher <vondicher@...> het volgende geschreven:
? Does anyone happen to have information on the correct edge connector that would work for this particular riser/extender? As specific as?possible, part number would be best.? Thank you, Radu.? On Fri, Sep 23, 2022 at 4:38 AM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Dave, There's two (one is for the short assemblies and has RF connectors for the A8 module), and I'm not sure I can point out which one's which, but per SM:? Radu.?
On Thu, Sep 22, 2022 at 8:34 PM Dave Casey < polara413@...> wrote: What's the part number for the card(s) you need? I can check my stash.
Dave Casey
On Thu, Sep 22, 2022 at 7:50 PM Radu Bogdan Dicher < vondicher@...> wrote: Douglas Electronics doesn't have ready-to-go 3335A cards. Not sure I can go custom on these cards for this one project. I have no pricing on that yet (still talking to them), but I can't imagine that path is feasible for a hobbyist project.?
If anyone has files to share to create a PCB for this, that would be fantastic.? Radu.?
You could see if Douglas Electronics are still going in CA.
They offered a large stock of extenders for common pitches/widths.? I bought a bunch and used some as-is, others I modified or cut down to suit particular instruments.? Gave me a very useful result.
|
Re: spectrum analyzer comparison
On 9/23/22 15:38, Glenn Little wrote: If you have a 8566, is there any reason to get a 8568? Lower noise floor, for one. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
spectrum analyzer comparison
If you have a 8566, is there any reason
to get a 8568?
Thanks
Glenn
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
|
Re: Pozidrive screws on HP covers
I gave up long ago trying to find the "exact right" screws for things, especially the HP mixed English/metric situation on some instruments, and the Pozidrive/Philips/Torx etc heads. I have all the driver types, and just use what fits and works. Those cover retaining screws are a PITA to use anyway - yes, they stay put so don't get lost, but gradually the heads and threads and holes get worn out, and often the clip ring breaks. It's also difficult sometimes to even get a cover installed if it's deformed a little, and you have to fiddle around jamming it into place while working the captive retainer screw.
My recommendation is to forget about the special screw and just keep a supply on hand of regular panhead head English and metric ones in the right thread size and length. Don't even worry about flatheads - regulars work better anyway. Just jam the cover in place, and pick the right screw that fits - done. If you loose it next time, get another.
Ed
|
FS: HP active probe 3-pin connector and cable
Hard to find vintage 3-pin connector and cable in excellent condition. Removed from an old HP 1120A probe. See my ebay listing.
-Gary NA6O
|
Re: Pozidrive screws on HP covers
I was in a Fastenal a couple weeks ago and bought some 2-56 hardware.
They had a sign up that said no cash sales, but credit cards were fine.
Not my favorite supplier, I'd rather go to an industrial fastener
supplier. Lots of those around and many will sell you 1 piece,
although I usually just buy a box.
Unfortunately that 0570-1171 screw is not a standard screw. Keysight
probably contracted with a screw machine products company to run off
a couple hundred thousand so to get an exact replacement you either
have to go to Keysight or find somebody with a machine shop. Then
you can pay $50 for a screw :-)
Paul
toggle quoted message
Show quoted text
On Fri, Sep 23, 2022 at 10:29:56AM -0700, Bill Martin wrote: Maybe. Last time I stopped by my local Fastenal store, they informed me that
they no longer sell retail, commercial accounts only! Bah, Humbug.
Bill m
On 9/23/22 09:37, Dave Daniel wrote:
Also, check Fastenal. Their only downside is that one has to purchase a bag, but the cost works out to much less than $4 per fastener.
DaveD
On Sep 23, 2022, at 11:23, Matt Huszagh <huszaghmatt@...> wrote:
?"Guy Dunphy" <guykd@...> writes:
Does anyone have a commercial source for the metric 3.5mm dia, 12mm long countersunk posidrive head screws used on later HP covers? The ones with a groove for the retaining circlip.
I'm currently fixing up another instrument with a missing cover retaining screw. This happens quite frequently, so I'd like to buy say 100, and not get stuck on this problem again.
The HP part number mentioned by a label inside the cover for the metric screws is 0515-1245. Both google and Ebay come up with nothing.
Some of the non-metric ones ( 0570-1171 ) would be good to have too. Google is pretty much useless for this sort of stuff; I'd go directly to
the Keysight part detail.
I've ordered the 0515-1245 from Keysight directly (see
). You'll need an
account on their parts store. FYI they're not cheap: like $4 each (when
I bought them), so 100 is going to cost you. Also, they're torx, not
pozidriv.
Unfortunately, the 0570-1171 appears to be obsolete. But, if you can
find another part number that might work. Or, you can reach out to
Keysight and they may be able to tell you a compatible replacement. If
you find that out, please report back! I'd be interested in that as
well.
The retaining rings are also orderable (eg 0510-0043), but typically you
can just reuse the retaining ring from the existing screw.
I also posted this information a few months ago here:
/g/HP-Agilent-Keysight-equipment/message/127168.
Matt
--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@... | Unix/Linux - We don't do windows
|
Re: OT:Tektronix SG5010 Service Manual
It's got schematics, parts list and about 45 pages of "Perfoemance Check, Maintenance and? Adjustment Procedure". That might be enough.
|
Re: Pozidrive screws on HP covers
I should mention that I don't know if this is an overall Fastenal policy, I'm located in California, where many things are at the whim of government...
Bill M
toggle quoted message
Show quoted text
On 9/23/22 10:49, Dave Daniel wrote: Ah. Well, that¡¯s new to me. Bummer.
DaveD
On Sep 23, 2022, at 13:30, Bill Martin <wwm@...> wrote:
?Maybe. Last time I stopped by my local Fastenal store, they informed me that they no longer sell retail, commercial accounts only! Bah, Humbug.
Bill m
On 9/23/22 09:37, Dave Daniel wrote:
Also, check Fastenal. Their only downside is that one has to purchase a bag, but the cost works out to much less than $4 per fastener.
DaveD
On Sep 23, 2022, at 11:23, Matt Huszagh <huszaghmatt@...> wrote: ?"Guy Dunphy" <guykd@...> writes:
Does anyone have a commercial source for the metric 3.5mm dia, 12mm long countersunk posidrive head screws used on later HP covers? The ones with a groove for the retaining circlip.
I'm currently fixing up another instrument with a missing cover retaining screw. This happens quite frequently, so I'd like to buy say 100, and not get stuck on this problem again.
The HP part number mentioned by a label inside the cover for the metric screws is 0515-1245. Both google and Ebay come up with nothing.
Some of the non-metric ones ( 0570-1171 ) would be good to have too. Google is pretty much useless for this sort of stuff; I'd go directly to
the Keysight part detail.
I've ordered the 0515-1245 from Keysight directly (see
). You'll need an
account on their parts store. FYI they're not cheap: like $4 each (when
I bought them), so 100 is going to cost you. Also, they're torx, not
pozidriv.
Unfortunately, the 0570-1171 appears to be obsolete. But, if you can
find another part number that might work. Or, you can reach out to
Keysight and they may be able to tell you a compatible replacement. If
you find that out, please report back! I'd be interested in that as
well.
The retaining rings are also orderable (eg 0510-0043), but typically you
can just reuse the retaining ring from the existing screw.
I also posted this information a few months ago here:
/g/HP-Agilent-Keysight-equipment/message/127168.
Matt
|
Yue, thanks for the information Yue. As I had already written, I had checked the power supplies of the YTO and they were correct, including that of the 5V.
Is't possible to have more information on the modifications you made to install other YIG oscillators? Thanks.
I hope you will soon be able to design a modern oscillator to replace HP's fragile YTO. You would have me as your first buyer!
|
Re: Pozidrive screws on HP covers
Ah. Well, that¡¯s new to me. Bummer.
DaveD
toggle quoted message
Show quoted text
On Sep 23, 2022, at 13:30, Bill Martin <wwm@...> wrote:
?Maybe. Last time I stopped by my local Fastenal store, they informed me that they no longer sell retail, commercial accounts only! Bah, Humbug.
Bill m
On 9/23/22 09:37, Dave Daniel wrote:
Also, check Fastenal. Their only downside is that one has to purchase a bag, but the cost works out to much less than $4 per fastener.
DaveD
On Sep 23, 2022, at 11:23, Matt Huszagh <huszaghmatt@...> wrote: ?"Guy Dunphy" <guykd@...> writes:
Does anyone have a commercial source for the metric 3.5mm dia, 12mm long countersunk posidrive head screws used on later HP covers? The ones with a groove for the retaining circlip.
I'm currently fixing up another instrument with a missing cover retaining screw. This happens quite frequently, so I'd like to buy say 100, and not get stuck on this problem again.
The HP part number mentioned by a label inside the cover for the metric screws is 0515-1245. Both google and Ebay come up with nothing.
Some of the non-metric ones ( 0570-1171 ) would be good to have too. Google is pretty much useless for this sort of stuff; I'd go directly to
the Keysight part detail.
I've ordered the 0515-1245 from Keysight directly (see
). You'll need an
account on their parts store. FYI they're not cheap: like $4 each (when
I bought them), so 100 is going to cost you. Also, they're torx, not
pozidriv.
Unfortunately, the 0570-1171 appears to be obsolete. But, if you can
find another part number that might work. Or, you can reach out to
Keysight and they may be able to tell you a compatible replacement. If
you find that out, please report back! I'd be interested in that as
well.
The retaining rings are also orderable (eg 0510-0043), but typically you
can just reuse the retaining ring from the existing screw.
I also posted this information a few months ago here:
/g/HP-Agilent-Keysight-equipment/message/127168.
Matt
|
Re: Pozidrive screws on HP covers
Waves hand in air:
Poof!? You're a company.
Worked for Graingers.
Harvey
toggle quoted message
Show quoted text
On 9/23/2022 1:29 PM, Bill Martin wrote: Maybe. Last time I stopped by my local Fastenal store, they informed me that they no longer sell retail, commercial accounts only! Bah, Humbug.
Bill m
On 9/23/22 09:37, Dave Daniel wrote:
Also, check Fastenal. Their only downside is that one has to purchase a bag, but the cost works out to much less than $4 per fastener.
DaveD
On Sep 23, 2022, at 11:23, Matt Huszagh <huszaghmatt@...> wrote:
?"Guy Dunphy" <guykd@...> writes:
Does anyone have a commercial source for the metric 3.5mm dia, 12mm long countersunk posidrive head screws used on later HP covers? The ones with a groove for the retaining circlip.
I'm currently fixing up another instrument with a missing cover retaining screw.? This happens quite frequently, so I'd like to buy say 100, and not get stuck on this problem again.
The HP part number mentioned by a label inside the cover for the metric screws is 0515-1245.? Both google and Ebay come up with nothing.
Some of the non-metric ones ( 0570-1171 ) would be good to have too. Google is pretty much useless for this sort of stuff; I'd go directly to
the Keysight part detail.
I've ordered the 0515-1245 from Keysight directly (see
). You'll need an
account on their parts store. FYI they're not cheap: like $4 each (when
I bought them), so 100 is going to cost you. Also, they're torx, not
pozidriv.
Unfortunately, the 0570-1171 appears to be obsolete. But, if you can
find another part number that might work. Or, you can reach out to
Keysight and they may be able to tell you a compatible replacement. If
you find that out, please report back! I'd be interested in that as
well.
The retaining rings are also orderable (eg 0510-0043), but typically you
can just reuse the retaining ring from the existing screw.
I also posted this information a few months ago here:
/g/HP-Agilent-Keysight-equipment/message/127168.
Matt
|
Re: Pozidrive screws on HP covers
Maybe. Last time I stopped by my local Fastenal store, they informed me that they no longer sell retail, commercial accounts only! Bah, Humbug.
Bill m
toggle quoted message
Show quoted text
On 9/23/22 09:37, Dave Daniel wrote: Also, check Fastenal. Their only downside is that one has to purchase a bag, but the cost works out to much less than $4 per fastener.
DaveD
On Sep 23, 2022, at 11:23, Matt Huszagh <huszaghmatt@...> wrote:
?"Guy Dunphy" <guykd@...> writes:
Does anyone have a commercial source for the metric 3.5mm dia, 12mm long countersunk posidrive head screws used on later HP covers? The ones with a groove for the retaining circlip.
I'm currently fixing up another instrument with a missing cover retaining screw. This happens quite frequently, so I'd like to buy say 100, and not get stuck on this problem again.
The HP part number mentioned by a label inside the cover for the metric screws is 0515-1245. Both google and Ebay come up with nothing.
Some of the non-metric ones ( 0570-1171 ) would be good to have too. Google is pretty much useless for this sort of stuff; I'd go directly to
the Keysight part detail.
I've ordered the 0515-1245 from Keysight directly (see
). You'll need an
account on their parts store. FYI they're not cheap: like $4 each (when
I bought them), so 100 is going to cost you. Also, they're torx, not
pozidriv.
Unfortunately, the 0570-1171 appears to be obsolete. But, if you can
find another part number that might work. Or, you can reach out to
Keysight and they may be able to tell you a compatible replacement. If
you find that out, please report back! I'd be interested in that as
well.
The retaining rings are also orderable (eg 0510-0043), but typically you
can just reuse the retaining ring from the existing screw.
I also posted this information a few months ago here:
/g/HP-Agilent-Keysight-equipment/message/127168.
Matt
|
Re: 3335A - extender cards
toggle quoted message
Show quoted text
Op 23 sep. 2022 om 16:45 heeft Radu Bogdan Dicher <vondicher@...> het volgende geschreven:
? Does anyone happen to have information on the correct edge connector that would work for this particular riser/extender? As specific as?possible, part number would be best.? Thank you, Radu.? On Fri, Sep 23, 2022 at 4:38 AM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: Dave, There's two (one is for the short assemblies and has RF connectors for the A8 module), and I'm not sure I can point out which one's which, but per SM:? Radu.?
On Thu, Sep 22, 2022 at 8:34 PM Dave Casey < polara413@...> wrote: What's the part number for the card(s) you need? I can check my stash.
Dave Casey
On Thu, Sep 22, 2022 at 7:50 PM Radu Bogdan Dicher < vondicher@...> wrote: Douglas Electronics doesn't have ready-to-go 3335A cards. Not sure I can go custom on these cards for this one project. I have no pricing on that yet (still talking to them), but I can't imagine that path is feasible for a hobbyist project.?
If anyone has files to share to create a PCB for this, that would be fantastic.? Radu.?
You could see if Douglas Electronics are still going in CA.
They offered a large stock of extenders for common pitches/widths.? I bought a bunch and used some as-is, others I modified or cut down to suit particular instruments.? Gave me a very useful result.
|
Dave McGuire