Re: Service manual scan post processing
Thanks, Alexandre? I will take a look.?
Seems like Acrobat Pro v11 is no longer supported? - any idea experience of their current product?
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Re: Service manual scan post processing
I scan a lot of manuals, pdfize it and thrown in my esquemateca (link in my sig)
I use Adobe Acrobat Pro (I believe V11), using low compression and clearscan. The output is great. Remember to mark the option "full page on screen" in properties before saving.
---8<---Corte aqui---8<---
- High quality schematics and service manuals FREE scanned by me
---8<---Corte aqui---8<---
I have recently been scanning sections of microfiched service manuals for a couple of group members using a Canon MS-800
There is a significant tradeoff between file size and readability (especially with circuit diagrams)
To simplify the scanning process I have been acquiring everything at maximum equipment resolution but this leads to files that might be 200Mb+ per fiche
These are unwieldy but get the job done
?
Does anyone in the group have experience with tools that might be used to post process these scans to reduce size whilst maintaining small font fidelity?
Any recommendations?
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Service manual scan post processing
I have recently been scanning sections of microfiched service manuals for a couple of group members using a Canon MS-800
There is a significant tradeoff between file size and readability (especially with circuit diagrams)
To simplify the scanning process I have been acquiring everything at maximum equipment resolution but this leads to files that might be 200Mb+ per fiche
These are unwieldy but get the job done
?
Does anyone in the group have experience with tools that might be used to post process these scans to reduce size whilst maintaining small font fidelity?
Any recommendations?
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Fan and ball bearings on 8340/8341 Sweep Generators
Just want to share my experience dealing with my noisy fan on my 8340s.
?
One of my 8340s started to develop loud fan noise to the point I need to do something. The fan is an ETRI 148VP 028030 AC fan. I took it apart, there are 2 miniature metal seal ball bearings. The mark on the bearing reads "ADR FRANCE Y3/16Z".? It's an unobtanium. After a lot of googling, it suggests it's a R3ZZ bearing. I measured and confirmed the demission.
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I then order some R3ZZ bearings from Amazon, it's a 20-piece pack. Out of 20 bearings, only 4 will fit into the shaft, and it's loud as hell. So the cheap bearings one could easily buy is a no go. Don't even waste your time.
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When I work on cars, I know NSK makes good ball bearings. They do have R3ZZ bearings but certainly not cheap. Does anyone have experience with NSK or other high quality miniature bearings?
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Is there a way to somehow remove the seal and re-grease the bearings?
?
Regards,
Calvin?
?
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Re: Looking for RF Limiter specs
Dave, the first place I would look would be in the HP, Agilent, Keysight Microwave Accessory catalog. Probably looking at several years from 1990¡¯s through 2006 will help you. All 5086-xxxx are listed as parts for instrumentation (not spec¡¯d), they have equivalent model nos. listed in the Microwave Accessory (MA Cat) catalog (these are spec¡¯d). Some of the catalog years also listed the part nos., but not always.
You will have to look at the instrumentation circuitry to get a rough idea of the frequency range, power level, etc. to match that instrument part no. to an instrument no. in the MA Cat.
Don Bitters
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Re: 5345A electronic counter *restoration adventure*
After reading a little more, I discovered that the clock signal for the display is not generated in A15, but in A14, specifically in U13 (pn 1820-1194 or 74LS193 up/down binary counter) . This signal is the result of divide by 64 the decimal point signal to use it for refresh the display.
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I leave you the high quality diagrams of A14 and A15. I have put them together, because in the Artek manuals they are divided and it is very uncomfortable to explore them.
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Re: HP 8563E Shows Signal Present at 100MHz and below without an Input
What marker frequency do you get on the 0dBm signal?
It sounds like you are looking at the LO feed through signal, if so the marker on peak signal will be 0 MHz @ 0 dBm.
What do you see if you do an instrument preset (green button)?
At turn on, what is the start frequency? What is the stop frequency? With cal signal connected, can you run the self cal procedure? What happens when you narrow the span to 100, 10, 5.01, 5.00, 1 MHz, and 100KHz? Do it with the phantom signal, then with the cal signal. Cal signal 300 MHz @ -10 dBm
Please report back your findings.
Don Bitters
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Re: IPA type for 3.5mm connector cleaning
On Sun, Feb 16, 2025 at 07:51 PM, David Speck wrote:
Isopropanol (Often sold as rubbing alcohol) is very definitely toxic,
and does not require denaturing.
Non-the-less, the label on my CVS brand isopropyl alcohol clearly states that it has a bitterant added to it, and it does leave a residue.
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Re: Agilent 8753ES P? and up arrow on left side of display ?
The up arrow means fast sweep mode P? I found to mean unlevelled power at the start or end of the sweep.
Perhaps the power settings are causing it to be out of range at the start or end of the sweep.
Considering the noisy trace, the red error message - it looks like it is not locked. Maybe it is just not able to phase lock due to the power being set too low. - is that possible on a good 8753ES with a built in test set? (assuming it is not option 011) Of course it could be a bad YIG too
Details here page 44 (1-8)
Here's a pic of the up arrow & P?.. What do they mean?? If I look closely I can see in red what might be the beginning of the word CAUTION. Any ides appreciated.
Thanks
Hank
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Re: IPA type for 3.5mm connector cleaning
There have been a number of recent posts about various alcohols for cleaning.
I wonder if there has been confusion between ethanol (EtOH) (grain alcohol) and isopropanol.? When distilling? grain mash, the best alcohol concentration you can get is about 70% EtOH and 30% water.? To get 99% EtOH, like Everclear, you have to dry the EtOH / H2O mix with a desiccant like silica gel.? 99% EtOH will avidly absorb water from the atmosphere until it reaches the 70/30 ratio again.
If EtOH is sold without a liquor tax stamp, it is denatured with something like Methanol, isopropanol, acetone, or MEK to keep it from being consumed internally.
Isopropanol (Often sold as rubbing alcohol) is very definitely toxic, and does not require denaturing.
Methanol (wood alcohol) is also toxic, and causes blindness if ingested in a significant quantity.? Methanol comes off the fermented mash in the early stages of distillation, in the "heads", and is supposed to be discarded.
Dave
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On 2/16/2025 6:39 PM, Steve Byan via groups.io wrote: The 91% isopropyl at my CVS has a bitterant added to it to prevent people from drinking it. It leaves a white residue behind. Since discovering that, I use only 99% isopropyl. Try asking the pharmacist for the 99% variety, some pharmacies stock it. Otherwise you can buy it from electronics distributors such as Mouser and DigiKey.
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Re: Agilent 8753ES P? and up arrow on left side of display ?
Here's a pic of the up arrow & P?.. What do they mean? ?If I look closely I can see in red what might be the beginning of the word CAUTION. Any ides appreciated.
Thanks
Hank
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The following items have been added to the Files area of the [email protected] group.
By: Yves Tardif <yves_tardif@...>
Description:
Firmware Pulse Generator 8130A
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Re: IPA type for 3.5mm connector cleaning
The 91% isopropyl at my CVS has a bitterant added to it to prevent people from drinking it. It leaves a white residue behind. Since discovering that, I use only 99% isopropyl. Try asking the pharmacist for the 99% variety, some pharmacies stock it. Otherwise you can buy it from electronics distributors such as Mouser and DigiKey.
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Re: IPA type for 3.5mm connector cleaning
On 2025-02-16 6:09 PM, Dave Daniel via groups.io wrote: Oh. Like separating sugar from gasoline by adding water, agitating and siphoning off the walter/sugar solution. I hadn't thought of that. Cool. Thanks. I bet there's a story behind that knowledge, maybe one that can only be told with the passing of the years..... Steve Hendrix
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Re: IPA type for 3.5mm connector cleaning
Oh. Like separating sugar from gasoline by adding water, agitating and siphoning off the walter/sugar solution. I hadn't thought of that. Cool. Thanks.
On Sun, Feb 16, 2025 at 17:56 Roger Henderson via <hendorog= [email protected]> wrote: My simple minded approach: IPA can be purified using a salting out process - because salt is not soluable in IPA but is soluable in water.?
I dont know which process is actually used. But because I worry about residual salt in the remaining water portion, I avoid the low conc. versions.
Roger AFAIK, the difference between IPA solutions of different concentrations is the amount of water in them. IPA is naturally hydroscopic and will absorb water over time. For lab purposes, I use the highest concentration that I can find in the local stores, which is usually 99% IPA.
I've actually been wondering if there is an easy method to determine the concentration of water in IPA solutions, since I assume that 99% IPA becomes less concentrated as it is exposed to the atmosphere over time. Perhaps specific gravity measurement.
Hi,
?
I am trying to clean the connector threads and surface of my 3.5mm VNA Calibration kits.
Keysight manual says use IPA but it doesn't say what kind of IPA. My local CVS has 70% and 91%, amazon has 99.9%.
Which one the best and saftest for the delicate devices like a cal kit?
?
Regards,
Calvin
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Re: HP 8670B amplifier - does it ring a bell with anyone?
OK, very sorry I still don't have photo(s) to post.
I expect to be where the unit is (a distance away) next weekend, I'll get photo(s) and post those then.
In the meantime thanks so much for the comments and discussion, and I'll be sure to come back to this as soon as I have access to the unit for photo(s).
Dave
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Re: IPA type for 3.5mm connector cleaning
My simple minded approach: IPA can be purified using a salting out process - because salt is not soluable in IPA but is soluable in water.?
I dont know which process is actually used. But because I worry about residual salt in the remaining water portion, I avoid the low conc. versions.
Roger
AFAIK, the difference between IPA solutions of different concentrations is the amount of water in them. IPA is naturally hydroscopic and will absorb water over time. For lab purposes, I use the highest concentration that I can find in the local stores, which is usually 99% IPA.
I've actually been wondering if there is an easy method to determine the concentration of water in IPA solutions, since I assume that 99% IPA becomes less concentrated as it is exposed to the atmosphere over time. Perhaps specific gravity measurement.
Hi,
?
I am trying to clean the connector threads and surface of my 3.5mm VNA Calibration kits.
Keysight manual says use IPA but it doesn't say what kind of IPA. My local CVS has 70% and 91%, amazon has 99.9%.
Which one the best and saftest for the delicate devices like a cal kit?
?
Regards,
Calvin
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Re: IPA type for 3.5mm connector clean ing
Some hardware stores also sell 99% IPA. For electronics I find 91% or higher has the best cleaning action.
?
Doug
---------- Original Message ---------- From: "Dave Daniel via groups.io" <kc0wjn@...> To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] IPA type for 3.5mm connector cleaning Date: Sun, 16 Feb 2025 17:36:23 -0500
AFAIK, the difference between IPA solutions of different concentrations is the amount of water in them. IPA is naturally hydroscopic and will absorb water over time. For lab purposes, I use the highest concentration that I can find in the local stores, which is usually 99% IPA.
?
I've actually been wondering if there is an easy method to determine the concentration of water in IPA solutions, since I assume that 99% IPA becomes less concentrated as it is exposed to the atmosphere over time. Perhaps specific gravity measurement.
?
Hi,
?
I am trying to clean the connector threads and surface of my 3.5mm VNA Calibration kits.
Keysight manual says use IPA but it doesn't say what kind of IPA. My local CVS has 70% and 91%, amazon has 99.9%.
Which one the best and saftest for the delicate devices like a cal kit?
?
Regards,
Calvin
?
?
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Re: IPA type for 3.5mm connector cleaning
AFAIK, the difference between IPA solutions of different concentrations is the amount of water in them. IPA is naturally hydroscopic and will absorb water over time. For lab purposes, I use the highest concentration that I can find in the local stores, which is usually 99% IPA.
I've actually been wondering if there is an easy method to determine the concentration of water in IPA solutions, since I assume that 99% IPA becomes less concentrated as it is exposed to the atmosphere over time. Perhaps specific gravity measurement.
Hi,
?
I am trying to clean the connector threads and surface of my 3.5mm VNA Calibration kits.
Keysight manual says use IPA but it doesn't say what kind of IPA. My local CVS has 70% and 91%, amazon has 99.9%.
Which one the best and saftest for the delicate devices like a cal kit?
?
Regards,
Calvin
|
IPA type for 3.5mm connector cleaning
Hi,
?
I am trying to clean the connector threads and surface of my 3.5mm VNA Calibration kits.
Keysight manual says use IPA but it doesn't say what kind of IPA. My local CVS has 70% and 91%, amazon has 99.9%.
Which one the best and saftest for the delicate devices like a cal kit?
?
Regards,
Calvin
|
Alexandre Souza
RubenRubio
Steve Byan
