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OT: SEMs, Re: [HP-Agilent-Keysight-equipment] 8566B inconsistent amplitude

 

On 6/16/22 11:26, ChrisBeee via groups.io wrote:
interesting to read that you are into electron microscopy too! This is clarly off-topic in this group, but maybe there are even more people here who share the same interest. So my first post is public before diverting it (into another group?).
What type of instrument are you repairing?
Yes, it's OT for here, but others may be interested.

The instrument I'm working on now is an antique, an Amray 1200 benchtop SEM. It's working nicely now, but still needs more adjustments and calibration.

My regular instrument is a much more modern Topcon ABT-32, with a digital imaging front end.

I have a JEOL SEM-T330A in my lab that I recently acquired.
Very nice! I recently picked up a JEOL JSM-T300, also from a university auction. It was local and cheap, and it came with schematics (!) so I couldn't pass it up.

Still a lot of things to do until I will dare to fire it up. It sat unused in a university lab for a couple of years, so all fluids including lubricants must be replaced. Especially the transformer oil does not impress me, it is degraded and likely will facilitate arcing inside the tank.
Yes, bad HV tank oil is definitely a risk. Hopefully it's not hard to get.

Once running, the T330A should be a great instrument for the usual household applications... ;o)
Of course! :-) My SEMs are in a working lab now, but my first SEM, about 25 years ago, was in my living room. I was popular back then. :-)

I got acquainted to a guy in Brazil who also bought a T330a recently, so we are already two for this instrument type. Do you by chance know about a (groups.io-) group dealing with electron microscopy?
I don't know of any, aside from the one that I created a few years ago specifically for the ETEC Autoscan SEM.

I'm thinking about creating a new one for SEMs in general. I'll email you about it off-list.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Torx head variety of top/bottom cover retaining screw

 

"Dave McGuire" <mcguire@...> writes:

Those will almost definitely be Pozidriv, not Philips, BTW.
Yes, they are pozidriv, thanks for the correction Dave. I'd written
these notes a while back when I didn't really appreciate the difference
and just copied them in here. Apparently I should have proofread it more
closely.

Matt
Re: Torx head variety of top/bottom cover retaining screw

 

On 6/16/22 11:33, Matt Huszagh wrote:
As far as I can tell, HP used two different types of screws to fasten
top/bottom covers to the rear chassis of an instrument: 6-32 0.46-in and
M3.5x0.6 12mm-LG. I have seen the M3.5 come in Phillips and Torx and the
6-32 only in Phillips. I checked a number of my instruments and the M3.5
seems to be a lot more common than the 6-32. The 0515-1245 mentioned
above is an M3.5 screw.
Those will almost definitely be Pozidriv, not Philips, BTW.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Torx head variety of top/bottom cover retaining screw

 

I tracked down the part number for a Torx variety of the cover retaining
screw: 0515-1245. This is directly orderable from the Keysight parts
store:



The price is pretty outrageous, but it's there if you need it. The
retaining ring (0510-0043) is also orderable, though this is less useful
as you should be able to just reuse the one from the existing screw.

A bit more background:

As far as I can tell, HP used two different types of screws to fasten
top/bottom covers to the rear chassis of an instrument: 6-32 0.46-in and
M3.5x0.6 12mm-LG. I have seen the M3.5 come in Phillips and Torx and the
6-32 only in Phillips. I checked a number of my instruments and the M3.5
seems to be a lot more common than the 6-32. The 0515-1245 mentioned
above is an M3.5 screw.

I'd previously investigated modifying existing screws for this purpose
but I don't think that's possible. The OEM screws have a thicker
diameter in the region where the slot is cut than normal screws. Even if
you got something to work I'd expect you would just end up with weak
screw. But someone who knows more about this sort of thing can weigh in.

I use the Jonard Tools CS-1022 for replacing this screw-retainer ring
assemblies:



It works great.

Hopefully someone else finds this useful.

Matt

PS I reached out to Torx Products a while back about this and they
claimed to have no knowledge of P/N 920-46590-570. That could be just
due to poor internal records. I ordered a few of the 0515-1245 and IIRC
they came from Singapore. I'll see if I can find a company name.
Re: 8566B inconsistent amplitude

 

Hi Dave,

interesting to read that you are into electron microscopy too! This is clarly off-topic in this group, but maybe there are even more people here who share the same interest. So my first post is public before diverting it (into another group?).
What type of instrument are you repairing? I have a JEOL SEM-T330A in my lab that I recently acquired. Still a lot of things to do until I will dare to fire it up. It sat unused in a university lab for a couple of years, so all fluids including lubricants must be replaced. Especially the transformer oil does not impress me, it is degraded and likely will facilitate arcing inside the tank. Once running, the T330A should be a great instrument for the usual household applications... ;o)
I got acquainted to a guy in Brazil who also bought a T330a recently, so we are already two for this instrument type. Do you by chance know about a (groups.io-) group dealing with electron microscopy?

Chris
Re: Does anyone have a copy of the HP Basic for Windows INSTALLING AND USING manual

 

Sorry for reviving an older thread but I did want to say that I'm using HP BASIC 7.1 with an NI GPIB-ENET/100 controller without issue.?

The first thing I did was to setup then GPIB-ENET/100 using the NI Ethernet Wizard and confirm that it was operating using NI MAX. Once that was set up I then installed HP BASIC 7.1 and made a change to line 340 of my AUTOST program:

340? ? ? ?LOAD BIN "GPIBNI;DEV GPIB0 ISC 7"? ? ?! National Instruments GPIB boards

I think this is a binary file on disk so I use RE-STORE to save it again (if it is an ASCII file then I would have used SAVE) - Once I did that it's been working fine with the GPIB-ENET/100.

I'm hoping to upgrade to a GPIB-ENET/1000 at some point but everyone seems to want to get around $750 for them on the auction sites so I'm waiting out for a better price...

TonyG
Re: HP 8594E downgrade after battery replacement

 

If you care about setting your serial number back to 1870, you can run
the command:

??? SERSET 1870

via either the GPIB port or the EXECUTE TITLE facility.

In the service manual, the command:

? FACTSET 11023,1

sets the analyzer to a C series.? You could try "FACTSET 11023,0" to
see if it will put it back to an E series.? Just a guess.

-mark
HP 70,000 hp70k MMS Are there any hidden SW Options, diagnostics, or hacks in (or for) the Rom code of the hp70k ?

 


Wondering if anyone has come across any 'hidden' Options, diagnostics or possible hacks within the hp 70k MMS Rom codes ?
Or? any possible code enhancements? of any the MMS modules (having Rom's)? via SW code ?

A]
Inspired by other HP systems? ( ... but may not be at all relevant to the hp70k MMS ):



/g/HP-Agilent-Keysight-equipment/topic/91729380

B]
.... Or hp70k fixes:


/g/HP-Agilent-Keysight-equipment/message/105414?p=%2C%2C%2C20%2C0%2C0%2C0%3A%3Arecentpostdate%2Fsticky%2C%2C70000+disassemble%2C20%2C2%2C0%2C73156863

/g/HP-Agilent-Keysight-equipment/message/87257?p=%2C%2C%2C20%2C0%2C0%2C0%3A%3Arecentpostdate%2Fsticky%2C%2C70000+code+DLP%2C20%2C2%2C0%2C24816200

thank you,
rick
OT: NE334S01 Device S2P Files

Lothar baier
 

this is a bit off topic and a long shot but is there anyone on this group that happen to have S2P or MDIF files for the NE334S01 or CE334S01 HEMT ?? the data sheet has the numbers but before i start going through the hassle of entering them manually i was just wondering if anyone has them
Re: 8566B inconsistent amplitude

 

Vladan and Dave

A very good point to consider but from what I recall no active devices where immediately sitting on top of the display section. I did have active devices nearby in the room which I will experiment with to see if I can reproduce the problem, if so I will report it here. Thanks
Re: NOS YIG oscillator for 141T 18GHz RF Plugin 8555A

 

sold
Re: 8566B inconsistent amplitude

 

I added a animated GIF file demonstrating my problem, click here to see it

Connecting the calibrator to the input, pressing Recall 7, and then going to zero span is the easiest way to see my problem. Notice the oscillation of the trace, this would happen continuously. I tried to connect other sources like a signal generator and function generator but the result was still the same.

I captured this at the time of the issue, now the trace is smooth and steady so far.
Re: low noise power supplies looking for suggestions

 

On Thu, 9 Jun 2022 at 20:25, Lothar baier <Lothar@...> wrote:

The last company I worked for we had Keithley source meters but they are too costly for hobby


The HP 4145A semiconductor analyzer sells on eBay quite cheaply. It has at 4 source measurement units (SMUs) in it.? I don¡¯t know how good they are, but recall thinking that they might be a cheap way of getting what is otherwise an expensive item. If I wanted an SMU, I would at least give consideration to buying an HP 4145A,?

Of course, it¡¯s not very desirable to use 19¡±rack mount equipment to run an LNA. ??

Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
Re: low noise power supplies looking for suggestions

 

On Thu, 9 Jun 2022 at 19:24, green <hrgerson@...> wrote:

hi Lothar,

When I prototype uW? LNA's I use batteries in a shielded minibox, with various o/p selections,?
a bit of a pain perhaps, but it is quiet DC.

rick


And battery chemistries are quieter than others. ?


Dave.?

--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
Re: HP 8566 A11U1 sampler interface and testing

 

"pianovt via groups.io" <pianovt@...> writes:

I am pretty sure I haven't seen a screw like this anywhere in the 8566. I think someone worked on this instrument before you got it. If hasn't been worked on since leaving the factory, then my best guess is that the screw fell out of some tool on the production line (e.g. electric screwdriver).
Thanks for the input Vladan. I've removed the screw and returned the
assembly to the instrument. No YTO unlock so far and I'm hopeful it
won't come back, but I'll post back if it does.

Thanks for all the help.

Matt
Re: 8566B inconsistent amplitude

 

Working on it...
Re: HP 8566 A11U1 sampler interface and testing

 

I am pretty sure I haven't seen a screw like this anywhere in the 8566. I think someone worked on this instrument before you got it. If hasn't been worked on since leaving the factory, then my best guess is that the screw fell out of some tool on the production line (e.g. electric screwdriver).

Vladan
Re: HP 8566 A11U1 sampler interface and testing

 

Matt Huszagh <huszaghmatt@...> writes:

I checked the leads too but none of them looked that long. At least none
of them looked longer than the sampler socket pins. I still clipped a
few down to be sure.
FWIW, I performed a more accurate test of this. I used the depth gauge
on a set of calipers to determine the amount of space between the bottom
of the PCB and the metal enclosure (about 3.15mm). The longest leads are
only about half that depth, so I think it's fair to say there's no lead
shorting to the enclosure. The screw still seems promising though.

Matt
Re: HP 8566 A11U1 sampler interface and testing

 

The image is rotated differently on the Groups.io page from the way I
see it locally. For the image on Groups.io, the potential screw hole is
in the upper right.

Matt
Re: 8566B inconsistent amplitude

 

On 6/14/22 21:26, pianovt via groups.io wrote:
This thread morphed from a amplitude accuracy problem to a wobbling trace problem. Regarding the second problem, it would have been good to see a video. Lacking that, did you have a piece of equipment sitting on top of the display when you noticed this wobbling? Even with the good mu-metal shield that's covering the 8566 crt, you can get some problems when another piece of equipment with a power transformer sits right on top of it.
I just had exactly this problem with an antique electron microscope that I've been restoring. I looked ALL OVER the power supplies and deflection circuits looking for the source of the wobble, for two solid days. In the end, I had a TE chiller sitting atop the console. Extended the hoses and moved the chiller the wobble went away. Man I was pissed.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
24761 - 24780 of 151671