Re: Sticky ink of schematics
Personally, I have found that the laser printer at home doesn't do this while the ones at work and in the print shop I use do --- the difference may be that the one at home is black+white only and is
By
David Slipper
·
#148719
·
|
Re: HP 8341B 1992 firmware version
That is correct, the firmware is the same for both. I have used exactly this firmware to update my 8341B without issues.
By
saevar
·
#148718
·
|
Re: HP 8594E PSU repair/debug safety checklist
Hi Group check the power switch they tend to fail on those. if the PSU is faulty contact me on OZ11LPR@... I have alot of parts for those units. It is a pain to work on that powersupply type.
By
Peter Hansen
·
#148717
·
|
Re: Sticky ink of schematics
Like Chuck said, laser printed items tend to stick to other stuff over time. I haven't seen it too bad from one paper sheet to another, but definitely from paper to plastics, or (toner sides) face to
By
ed breya
·
#148716
·
|
Re: HP 8341B 1992 firmware version
There is no differences in CPU board and firmware between 8340B and 8341B. Calibration constants 79 and 98 must 2 for 8340B and 5 for 8341B, according to service manual.
By
§¥§Þ§Ú§ä§â§Ú§Û §À§â§î§Ö§Ó
·
#148715
·
|
Re: VNA Resonance Methodology
Jinxie, I should return to the lab in a few weeks. Can crank up my HP 4195A network -Spectrum analyzer (500 MHz) Also the Boonton / Measurements GDO and Q meter With a photo and specs of the coils you
By
Froggie the Gremlin
·
#148714
·
|
Re: VNA Resonance Methodology
OK..... quite a lot to digest there and it's rather late at night in my zone right now so I'll have to re-read this in the stark light of morning. I think it would be illustrative to post a photo of
By
Jinxie
·
#148713
·
|
Re: Sticky ink of schematics
Modern laser printers and copiers use a finely powdered plastic toner to create the letters and pictures that are on the page. The plastic dust is placed onto the paper electrostatically, and is fused
By
Chuck Harris
·
#148712
·
|
Re: HP 8594E PSU repair/debug safety checklist
Don't get too enamored with tracing out and debugging your power supply, 9 times out of 10, the problem will be simply a case of bad electrolytic capacitors. I am not being casual with my statistics,
By
Chuck Harris
·
#148711
·
|
Re: VNA Resonance Methodology
Note that the 6cm diameter loop antenna ideally needs to form a closed loop, so one end of the loop connects to the centre pin of the coaxial connector and the other end of the loop connects to the
By
jmr
·
#148710
·
|
Re: VNA Resonance Methodology
If it helps, I dug out one of my test solenoids and put a 390pF ATC 800B cap across it and used the loop antenna method to find the resonance with the VNA set to s11. See the image below where the
By
jmr
·
#148709
·
|
Re: Troubleshooting a 8591e with opt 130
Marco, For A1-A5 and G1 to G3: +0.019V/ 1=+4.8V For G4 to G6: -7.4V / +14.28V With my 8595E, A5 -16dB is activated with CORR=ON, and OFF when CORR=OFF. This would mean that I would probably have a
By
Yves Tardif
·
#148708
·
|
Pulling CT2 Demodulator (opt 110) from HP8594E
I have a 8595E that I want to remove the CT2 Demodulator (option 110) card from. Now I am wondering if any rewiring is required? I tried to find the option 110 installation instructions, but sofar no
By
Wilko Bulte
·
#148707
·
|
Re: Troubleshooting a 8591e with opt 130
Yves, I finally had some time to solder and to the measurements, sorry for the hold up. Below are the results ** Next I checked all the lines to see if they would ever change by changing the ref level
By
Marco
·
#148706
·
|
Re: Sticky ink of schematics
Greetings, I asked a longtime friend who spent his career in the printing and photo lithography industry. He suggested reaching out to the ¡°American Academy of Forensic Sciences¡± located in
By
ken chalfant
·
#148705
·
|
Re: HP 8341B 1992 firmware version
Hi saevar, I saw them but these are labeled as for 8340B not 8341B. Do you know whether firmware for 8340B and 8341B is exactly the same? Regards
By
wojciechoo@...
·
#148704
·
|
Re: VNA Resonance Methodology
Yes, and also the ferrite can introduce non-linear artefacts at levels below saturation. This type of distortion can happen if you use the ferrite in a narrow bandpass filter for example. Note that
By
jmr
·
#148703
·
|
Re: Sticky ink of schematics
I read in your links to the threads...that ISO...which I paraphrase here... they think "if there is transfer, and sticking, it is likely toner." AFAIK, that... if I have articulated their claim
By
Roy Thistle
·
#148702
·
|
Re: VNA Resonance Methodology
Check the double tuned LC network theory. As you change the coupling between two tuned ckts, they interact, and the usual resonant peak becomes split. In a GDO your exciting the LC DUT with the GDO
By
Froggie the Gremlin
·
#148701
·
|
Re: Sticky ink of schematics
If they were stacked...heat, pressure, and time. > > >
By
Roy Thistle
·
#148700
·
|