Re: Question / Survey: actual Longevity ( years, time ) of Hp ThinkJet 51604a & 99261a InkJet ink cartridges ?
I guess for clarity I should have pointed out that I repaired the 2225A around 2018, I bought those cartridges new for that repair and the sample image I sent was from the one I installed then in 2018 which I assume would have had a similar install by date (Jul 2020) to the still sealed one that I have on the shelf.?
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I took that photo today, so for my environment, that 6-year-old cartridge is still pretty good.
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TonyG
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Re: HP8753B VNA question regarding if I purchase one
I think that you will find that the user interface of the 8753 (for typical operation) is quite intuitive even though it will appear quite dated. However, things aren't so great if you want to add and manage your own 'user' cal kit.
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There is some old Win98/2k/XP PC software called VNA Cal Manager that makes this stuff easier. It will probably work under Win10 or Win11 but I haven't tried it. You can also get screenshots and data from it using the KE5FX toolkit software and the KE5FX VNA software package.
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You would need to obtain a USB to GPIB cable if you wanted to be able to use the VNA cal Manager or if you wanted to dump screenshots or data from the HP 8753B model as it doesn't have a floppy drive.
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Re: Question / Survey: actual Longevity ( years, time ) of Hp ThinkJet 51604a & 99261a InkJet ink cartridges ?
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Yes, I would expect that *sealed* unopened new ThinkJet cartridges would have a lifetime between 1 to 3 years,
from some of the sales literature on-line.
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I did come across one research paper that identified InkJet ink chemistry degradation over a 1 month & 1 year time period,
?but that article did not describe whether actual (practical)? printing was affected.
?
What I want to know is ...? if the ThinkJet ink? is still good for practical printing
?? after 3, 5, 7, and 10+ years, of sitting on a shelf, UN-opened,
.... and then tried in a working printer !
?
Anyone use a? 3+ year?? older? 51604a? Or? 92261a ? unopened cartridge? in their ThinkJet
with? great/ good/ bad? print results ?
?
?
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I'm not sure if it's wise to put up my final ENR table for my 346A (HP 346A made in 1993) as there will be spreads between these devices. So it is going to be of limited use to anyone else. Also, I don't know how stable the noise output will be below 10MHz over time and temperature. So it might be quite different in a few months or years.
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But here it is anyway...
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2MHz? 4.65dB
3MHz 5.05dB
5MHz? 5.47dB
10MHz? 5.59dB This is the factory calibrated value stamped on it at 10MHz.
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So it looks like the ENR is just under 1dB lower at 2MHz compared to the factory value stamped on it at 10MHz. This is about 0.65dB lower than my initial estimate at 2MHz but I didn't spend much time on it back in 2019.?
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A lot depends on the value of the blocking cap after the attenuator and also the noise output of the diode at low frequencies. I really don't know how stable it will be over time. Above 10MHz it is remarkably stable because I've had consistent results from it for many years and I can leave it for several hours on the analyser without seeing any drift.
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I also checked out the Noisecom diode on the RSA3408A and it does appear to be flat to almost 200kHz. There is some rolloff below about 500kHz but not much. My other homebrew noise source is the one with a Schottky diode. This is a low barrier device with a guard ring and it gives remarkably flat noise out to about 5GHz. It is also essentially flat down to about 500kHz. It is a bit drifty with temperature changes though...?
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?
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Re: Question / Survey: actual Longevity ( years, time ) of Hp ThinkJet 51604a & 99261a InkJet ink cartridges ?
I bought a couple of new 51604A's when I got my 2225A to repair from Office Depot or Staples etc - They're marked "Install By Jul 2020" - I haven't opened the spare one yet but here is what my current one (which should have had the same or very close install by date on it):
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Hope that helps.
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TonyG
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To investigate this further, I measured four different 346A noise sources on an E5080A VNA. These are all made in 2004 and the serial numbers are quite close together. They are all within 150 of each other.
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The reactive part of the impedance looks quite similar but the resistive part is different and you can see some spread in VSWR. I suppose it's possible they may have been stressed by reverse power at some point but this is unlikely.
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This might represent the typical spread in VSWR seen with these noise sources. It may be that one or more of the resistors in the matching section is a select on test device with the aim of achieving low VSWR and best noise response out to 18GHz.
I'm not sure how much spread to expect in the attenuation value of the 16dB attenuator at the output port of the noise source.
?
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?
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Question / Survey: actual Longevity ( years, time ) of Hp ThinkJet 51604a & 99261a InkJet ink cartridges ?
?
Anyone have any *actual* experience of their? *unopened*? Longevity of either Hp 51604a &/or Hp 92261a ink cartridges ?
?( years on-the-shelf? *till use*? in the printer ;??
??
>>?? Not asking about how long one had an "opened" ThinkJet 51604a or 92261a cartridge sitting in a printer,
? Nor the mess that made !!
?
Trying to understand the longevity and viability of the ThinkJet ink, on the shelf ( storage life ) & actual use.
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Newer Hp 51604a ink cartridges come with an "Install Before"? expiry date.
Don't recall if any of the older Hp 92261a ink cartridges had such.
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I recently purchased some Hp 51604a cartridges on eBay with 2004, 2006, 2007 & 2008 expiration dates and am examining them for print-ability & efficacy.? So far varied results and am tabulating this.
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Has anyone opened older expired cartridge packages, installed them in their Hp 2225 or QuietJet or QuietJet + printers
?? and had any terrible or nonproductive results ?
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If so, can you state the expiry date of your cartridge & date of the print test & outcomes ?
?
thank you !
?
?
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Hi all?
I am looking for Scales for the HP 8620 especially ones that Say HUGHES on them
Alternatively any that I can use to put a custom scale onto
?
Regards Paul ?located in the UK
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Re: Anyone able to do GC or GC-MS on Hp ThinkJet Black ink ( for the Hp ThinkJet 2225 printer; Hp 9226a Or Hp 51604a ink cartridges ) ?
?
A compendium of Hp SDS or MSDS sheets? for the Hp 2225 ThinkJet printer inks:
?
More chemistry data:?
?? Different year SDSor MSDS sheets provide different,? & sometimes additional clues, of the InkJet ink? recipes.
? ? ? Hp was tinkering with different ink compositions.
?
?Early Hp 9226a black ink ( for "treated paper" )
&
?the? later Hp 51604a? black ink? ( for plain paper )?
?
?? Note:? unable to find earlier Hp 92261a ink cartridge SDS or MSDS data sheets.
??? { please look in your? Hp 92261a cartridge boxes?? & post scans of the MSDS sheet or rear of package info !! }
?
?
A]
Hp 92261a ThinkJet Ink MSDS sheets: { used with the original Hp "treated" printer paper }
?
2003 Hp 92261a Ink? pH at 7.7 to 8.3? { lists Food Black 2 Acid salt #1 & Food Black 2 Acid salt #2 }
?
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{ Note: the Original ThinkJet cartridge, Hp 92261a, had a *clear* plastic housing, as shown in the photo at the Hp Museum
one could easily look through the cartridge & see the internal collapsible black-rubber bladder containing the ink:
-- the Hp Museum listed this photos as the Hp part# 51604a for both ThinkJet & QuietJet printers.
??? Later Hp 51604a plastic cartridges were *Black* in colour,
... not certain when this change took effect.
-- perhaps the black plastic cartridge was an attempt by Hp to possibly protect the ink from room-light photo degradation ??
?
**? **? ** **
B]?
Hp 51604a ThinkJet Ink MSDS sheets:
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2001 Hp MSDS lists ph at 7.7 to 8.3
https://www.officeworld.com/msds/HEW51604A.pdf
?
2002 Hp MSDS lists the pH at 7.5 to 8.5
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2003 Hp MSDS lists pH at 7.7 to 8.3
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2004 Hp MSDS lists pH as 7.2 ( 7.0 - 7.4 ) { Black plastic cartridge Rev. B. ;? Note: earlier Hp 9226a cartridges were clear plastic }
?
2013 Hp MSDS lists the pH as 7.0 - 7.4?? for the Rev. B 51604a Ink
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2015 Clover MSDS sheet lists pH as 7.7 - 8.7
https://www.bettymills.com/product/MSDS/IVR51604A.PDF?srsltid=AfmBOoqeKWAOcX3YhS2WCLOy6D0u9cN3YmVWdNBrnskEyLgxoypgxS_H
?
2015 Hp MSDS? lists pH as 7.0 to 7.4
?
**
? OT:
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Hp Library of SDS or MSDS Data sheets for other, modern Inks:
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?
?
?
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Re: HP8753B VNA question regarding if I purchase one
On Sunday 20 October 2024 03:47:46 pm Dr. David Kirkby, Kirkby Microwave Ltd wrote: On Sun, 20 Oct 2024 at 17:55, Roy J. Tellason, Sr. via groups.io <roy=
[email protected]> wrote:
Where you buy it matters. There's a list on the nanovna groups io that
lists recommended vendors, where you'll get the real thing and not a
clone. I bought mine from R&L, along with some adapters and such. No
connection other than I'm a satisfied customer.
The word ¡°clone¡± is talked of by a lot of nano VNA vendors. But they are
all derived from an open source project. In typical Chinese fashion they
1) Try to improve
2) Copy each others improvements
3) Moan about others coping them.
So there¡¯s no guarantee that any particular design, which is being
constantly changed, will be the best. I don't recall the way the term is used in that group, but basically it seems to mean that some things simply won't work the way you'd expect. I think that includes firmware updates. I've had mine for a few years, and not too long ago updated the firmware in it to what was then the latest version, giving me a few new functions in the menu tree, and things went smoothly. I had an early NanoVNA, but found the small screen too small. An 8753 has a
bigger screen than any NanoVNA. The first one I saw, at a local ham radio club, was one of those. I thought it kinda neat that you could stick something like that in your shirt pocket, but I couldn't have lived with that small screen either, so I got the bigger one, the "h4". It does what I need it to. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin
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Agilent Logic Analyzers 90-pin connectors
Hi,
Considering refurb pods demential prices, I'm planning to rebuild a series of Agilent pods. Flat cables of 16700 series input on flat "90-pin high-density connectors".
Found nowhere any reference for a male mating connector. And Mousikey is a real maze for connectors.
Anyone has the answer?
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Hello,
?
I am looking for the DD image for a DSOS254A
?
Best regards
Eric
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Re: HP 8970A (B) NF meter
I have used enthanol to fix my keys, works great, too. I still vote for taking the keyboard pcb out of the instrument and giving it a thorough soak while operating the keys. There can be a lot of goo on the board and you do not want the goo from the upper key to soak into the lower key.
Also, it is a good idea to check if all key springs are still where they are supposed to be. Missing springs can be homemade by cutting thin steel foild into shape.
But make sure they do not meander inside the instrument and cause shorts there.
?
Tom
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Re: HP8753B VNA question regarding if I purchase one
Michael,
I note you are prepared to wait until the "right" 8753A/B/C turns up. This is a good approach.? I picked up a one owner 8753B setup for less than a LibreVNA.
For lower frequency the DG8SAQ unit's are much better quality
?
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VNAs with external test sets
The venerable Hp8753A-E series (and Agilent) were especially accommodating for? testing active amplifiers using external high power directional couplers. The separate test set was removed and the Ref, A, B channels were driven directly with attenuators from various couplers before and after the amplifier.
?
Keysight has made it very difficult to do this without spending much more money. In their ENA line which is considerably less costly than their PNA line, the 5081A ENA-X is tthe only model with external jumpers to allow disconnecting the internal test set couplers. This is a 20 GHz machine (in the lowest version) with 3.5 mm connectors. Prior to discontinuance, the E5072A was closest thing to do what the 8753 models with separate test sets could. E5072A has type N connectors, can be bought with a 4.5 or 8.5 GHz top end. They can still be found used or demo, for less than $25K, and have a little cover on the front panel covering the hard coax jumpers that can be removed to allow accessing the receiver channels. I have two of these at work, just bought the second one from one of the test equipment rental/used dealers.
?
John Lyles
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Re: HP8753B VNA question regarding if I purchase one
One of the things I¡¯ll add is that I had a ¡®dim screen¡¯ 8753 turned out to be dirt built up on the face of the CRT and the back of the flat plastic cover over it. It was a PITA, but once I got it apart and cleaned it it was bright and gorgeous!
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Show quoted text
On Oct 20, 2024, at 19:35, Edward Prest via groups.io <prest.edward.3@...> wrote:
? I will recommend going with a nano vna to start with. At the hobby/ham/education level of use you can do quite a lot. It will cost you less than just 1 phase stable cable, never mind the cal standards and connectors.? You can design filters, fix front ends, tune antenna (with care) for all of $200. PC plot your smith charts too. They work out of the box, no fiddling around, battery powered, portable like a multi meter. There are PC apps to do much more lab type work too. You have to understand that 30 year old boxes don't have that much compute power compared to modern ARM devices.
?
Downside is way less dynamic range and input protection, overall quality can vary. Connecting to a antenna can blow up the front as they have no static protection whatsoever (a useful little project however) . Not really worth repairing. Avoid clones at all costs. Nano firmware is open sourced C? and is stable for official releases. Research the store carefully.
?
Spend 6 months with it and then, if necessary, get the lab unit. You will know what you need by then.
Want vs need is another issue you need to resolve too.
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Re: HP8753B VNA question regarding if I purchase one
LibreVNA fan example.? I saw a LibreVNA V3 for sale somewhere with fins on both?sides.
Jim Cotton?
n8qoh
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Show quoted text
Very interesting, thanks for this information.?
I have had LibreVNA in the back of my mind for a while as an option instead of a NanoVNA. Haven't heard much firsthand knowledge about LibreVNA, just tons about NanoVNA, so this is valuable info. Might bump VNA aquisition up on the never ending
to do pile and go the LibreVNA route.
-Michael Bierlein
As an owner of an 8753C and a LibreVNA I will say the the LibreVNA performs quite well compared against the 8753C.? Using the LiberVNA at 5GHz does show its limitations above 3 GHz though.??
To make the LibreVNA overcome its thermal issues, I found a stick-on heat sink that was 10mm short in one dimension on eBay and installed it on the top.? I then put a large quiet fan on each?side and added legs to the bottom fan.? I will note that if one uses
phase stable cables and real calibration standards with it, it can be a challange to keep?the mess from sliding around the bench.
For repeatability, I vote for the 8753C, for general hobby use, the LibreVNA is better than the pile of nano VNAs and clones I have collected over the years.? The nanoVNAs and clones make nice presents for interested students to use for preliminary data on
their projects when working outside the university labs.
Some of the cheaper devices described on eBay as VNA's are actually scalar network analyzers...
Jim Cotton
n8qoh
One needs to be careful about NanoVNAs.? There are a lot of clones out there. Most don't have the noise or return loss specs like the authentic product. The real NanoVNA website:?
Some while ago I came across a NanoVNA site that seemed to be a fairly valid site ().? But the info mentions that they use harmonics for the higher frequency measurement ranges.? Their product
also appears to have a higher noise floor.? The drawback regarding the harmonic issue is explained in the earlier
site above who uses fundamental frequencies instead.?
Another up-and-comer seems to be the LibreVNA that works out to 6 GHz.? The developers site is ().? He says it is still in a "work-in-progress" status.? The board
layout is impressive though.? I looked into it a bit for my own use and my research has found while it's a good "hobbyist" level VNA it does suffer from heat issues. This in turn causes performance problems. Many users have circumvented this by building their
own heatsink platform or underside fan arrays to mitigate thermal issues. Supposedly this problem is being addressed for the next generation on the unit. I haven't seen any news about a V3 release yet.
Greg
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Re: HP8753B VNA question regarding if I purchase one
On Sun, Oct 20, 2024 at 04:59 PM, Jim n8qoh wrote:
As an owner of an 8753C and a LibreVNA I will say the the LibreVNA performs quite well compared against the 8753C.?
Jim, just a few questions regarding the LibreVNA...
?
1.? How big of a problem is the heat issue?
?
2.? Is there software that can be run on a PC (e.g. Windows 10) that allows download of SnP files in Touchstone format to the PC?
?
3.? And can parameters of calibration standards be entered (similar to what one can do with an 8753 VNA)?
?
Thanks!
?
- Jeff, k6jca
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Re: HP8753B VNA question regarding if I purchase one
Very interesting, thanks for this information.?
I have had LibreVNA in the back of my mind for a while as an option instead of a NanoVNA. Haven't heard much firsthand knowledge about LibreVNA, just tons about NanoVNA, so this is valuable info. Might bump VNA aquisition up on the never ending to do pile and go the LibreVNA route.
-Michael Bierlein
As an owner of an 8753C and a LibreVNA I will say the the LibreVNA performs quite well compared against the 8753C.? Using the LiberVNA at 5GHz does show its limitations above 3 GHz though.??
To make the LibreVNA overcome its thermal issues, I found a stick-on heat sink that was 10mm short in one dimension on eBay and installed it on the top.? I then put a large quiet fan on each?side and added legs to the bottom fan.? I will note that if one uses
phase stable cables and real calibration standards with it, it can be a challange to keep?the mess from sliding around the bench.
For repeatability, I vote for the 8753C, for general hobby use, the LibreVNA is better than the pile of nano VNAs and clones I have collected over the years.? The nanoVNAs and clones make nice presents for interested students to use for preliminary data on
their projects when working outside the university labs.
Some of the cheaper devices described on eBay as VNA's are actually scalar network analyzers...
Jim Cotton
n8qoh
One needs to be careful about NanoVNAs.? There are a lot of clones out there. Most don't have the noise or return loss specs like the authentic product. The real NanoVNA website:?
Some while ago I came across a NanoVNA site that seemed to be a fairly valid site ().? But the info mentions that they use harmonics for the higher frequency measurement ranges.? Their product also appears
to have a higher noise floor.? The drawback regarding the harmonic issue is explained in the earlier site above who uses fundamental frequencies instead.?
Another up-and-comer seems to be the LibreVNA that works out to 6 GHz.? The developers site is ().? He says it is still in a "work-in-progress" status.? The board layout is impressive
though.? I looked into it a bit for my own use and my research has found while it's a good "hobbyist" level VNA it does suffer from heat issues. This in turn causes performance problems. Many users have circumvented this by building their own heatsink platform
or underside fan arrays to mitigate thermal issues. Supposedly this problem is being addressed for the next generation on the unit. I haven't seen any news about a V3 release yet.
Greg
|
Re: HP8753B VNA question regarding if I purchase one
As an owner of an 8753C and a LibreVNA I will say the the LibreVNA performs quite well compared against the 8753C.? Using the LiberVNA at 5GHz does show its limitations above 3 GHz though.??
To make the LibreVNA overcome its thermal issues, I found a stick-on heat sink that was 10mm short in one dimension on eBay and installed it on the top.? I then put a large quiet fan on each?side and added legs to the bottom fan.? I will note that if one uses
phase stable cables and real calibration standards with it, it can be a challange to keep?the mess from sliding around the bench.
For repeatability, I vote for the 8753C, for general hobby use, the LibreVNA is better than the pile of nano VNAs and clones I have collected over the years.? The nanoVNAs and clones make nice presents for interested students to use for preliminary data on
their projects when working outside the university labs.
Some of the cheaper devices described on eBay as VNA's are actually scalar network analyzers...
Jim Cotton
n8qoh
toggle quoted message
Show quoted text
One needs to be careful about NanoVNAs.? There are a lot of clones out there. Most don't have the noise or return loss specs like the authentic product. The real NanoVNA website:?
Some while ago I came across a NanoVNA site that seemed to be a fairly valid site ().? But the info mentions that they use harmonics for the higher frequency measurement ranges.? Their product also appears
to have a higher noise floor.? The drawback regarding the harmonic issue is explained in the earlier nanorfe.com site above who uses fundamental frequencies instead.?
Another up-and-comer seems to be the LibreVNA that works out to 6 GHz.? The developers site is ().? He says it is still in a "work-in-progress" status.? The board layout is impressive
though.? I looked into it a bit for my own use and my research has found while it's a good "hobbyist" level VNA it does suffer from heat issues. This in turn causes performance problems. Many users have circumvented this by building their own heatsink platform
or underside fan arrays to mitigate thermal issues. Supposedly this problem is being addressed for the next generation on the unit. I haven't seen any news about a V3 release yet.
Greg
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Paul Bicknell
Christian F1GWR
bownes
