¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
  2. Messages
Expanded Topics Messages
Date
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 ) ?

 

It could be that Food Black 2 is used but what they have made confidential is the salt that they use to neutralize the dye.? In this case Food black 2 has 4 sulfonic acid groups that need to be neutralized to stabilize it.? Sometimes this is done with Sodium.? It could be they are using something else that they don't wish to disclose.? This does have implications for the GC-MS analysis and sample preparation.? It can make analysis more difficult requiring some kind of acidic work up to remove the salt.
Re: Boonton 92BD Troubleshooting

 

Brought a 260 q meter back to life earlier this year.? Had some idea of what happened with them and hp, but not that detailed.? Thanks for that!? :)


On Fri, Oct 4, 2024, 6:57?PM Richard Knoppow via <dickburk=[email protected]> wrote:
? ? FWIW, I was one of those who promoted the Boonton list. There were
two Boonton companies: Boonton Radio, who made the Q-Meter, RX-Meter and
a series of signal generators,? and Boonton Electronics who made RF
millivoltmeters and other intruments. There may even have been another
Boonton company.
? ? Hewlett-Packard bought Boonton Radio Co, and continued to make
Q-Meters and other Boonton instruments. I don't know what happened to
Boonton Electronics. Originally, the Boonton list was aimed at those who
had the instruments made by Hewlett-Packard but because of the confusion
of the names and difficulty of finding authentic information on some of
the devices, the list became a sort of general catch all for anything
with boonton in the name.
? ? ?From what I see here the Boonton List is almost moribund, so I
think we should not object to questions being posted here although they
probably should also go to the Boonton list. Both companies made some
unique instruments and had reputations for high quality.
? ? There are many Boonton Radio handbooks and other literature at the
-hp- archive site but perhaps not for Boonton Electronics. However, its
worth a look.
? ? ?Boonton N.J. was a sort of center of electronics in the 1940s and
on including the famous Aircraft Radio Co (ARC). The smaller companies,
like Boonton Electronics, seem almost forgotten now. Sad.

On 10/4/2024 2:47 PM, Dave Daniel wrote:
> There is a Boonton group.
>
> DaveD
> KC0WJN
>


--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
Re: Boonton 92BD Troubleshooting

 

FWIW, I was one of those who promoted the Boonton list. There were two Boonton companies: Boonton Radio, who made the Q-Meter, RX-Meter and a series of signal generators, and Boonton Electronics who made RF millivoltmeters and other intruments. There may even have been another Boonton company.
Hewlett-Packard bought Boonton Radio Co, and continued to make Q-Meters and other Boonton instruments. I don't know what happened to Boonton Electronics. Originally, the Boonton list was aimed at those who had the instruments made by Hewlett-Packard but because of the confusion of the names and difficulty of finding authentic information on some of the devices, the list became a sort of general catch all for anything with boonton in the name.
From what I see here the Boonton List is almost moribund, so I think we should not object to questions being posted here although they probably should also go to the Boonton list. Both companies made some unique instruments and had reputations for high quality.
There are many Boonton Radio handbooks and other literature at the -hp- archive site but perhaps not for Boonton Electronics. However, its worth a look.
Boonton N.J. was a sort of center of electronics in the 1940s and on including the famous Aircraft Radio Co (ARC). The smaller companies, like Boonton Electronics, seem almost forgotten now. Sad.

On 10/4/2024 2:47 PM, Dave Daniel wrote:
There is a Boonton group.
DaveD
KC0WJN
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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 ) ?

 

Well, RIT dye contains salt, and what dyes doesn't
FDA think are food dyes? They allow Red #40, and
yellow #5...

It is said that if you hear the sound of hoof beats
on the commons, it is more likely to be horses than
zebras.

I think it is quite likely that HP would have used
a cheap, easy to get dye like used by RIT in their
printer. By doing so, they get to piggy back on all
the years RIT sold their safe product to consumers.

The salt in RIT dye serves to improve its permanent
nature.

-Chuck Harris


On Fri, 04 Oct 2024 12:36:09 -0700 "Roy Thistle"
<roy.thistle@...> wrote:
On Wed, Oct 2, 2024 at 10:17 AM, gren wrote:


Possibly the MSDS
HP MSDS data for 2002, for 51604A Black

Component/Substance CAS Number ?EU Number % by Weight
Ethylene glycol ? 107-21-1 203-473-3 <35%
Triethylene glycol 112-27-6 203-953-2 <15%
Food Black 2 acid salt confidential confidential <6%
Water 7732-18-5 231-791-2 > 50%
note that the secret sauce is the Food Black 2 @ acid salt combo.
They are not fessing up to what the 'acid salt is' or how much of it
is used.

2002 is relatively recent; but, older MSDS might even be less
informative... as they are only required in them... new or old... to
mostly list 'hazardous' materials... and one man's hazard is another
man's fun, on YouTube.
Re: Boonton 92BD Troubleshooting

 

¿ªÔÆÌåÓý

I personally don't mind your post. I just mentioned the other group in case you were unaware of it.

DaveD
KC0WJN

Thanks for all the fish.
==============================
All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994)
==============================

On Oct 4, 2024, at 17:57, Bill Berzinskas via groups.io <bberzinskas@...> wrote:

?

It looked very underloved but if that's not the case I can move this post.


On Fri, Oct 4, 2024, 5:47?PM Dave Daniel via <kc0wjn=[email protected]> wrote:
There is a Boonton group.

DaveD
KC0WJN

Thanks for all the fish.
==============================
All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994)
==============================

On Oct 4, 2024, at 17:45, Bill Berzinskas via <bberzinskas=[email protected]> wrote:

?
Boonton stuff ok in this group?? If not, I can delete.? ??

I picked up a mostly dead Boonton 92BD RF Millivoltmeter, seemed like a handy tool should i get it working. I've replaced the electrolytics and one of the LM723 regulators bringing back _some life_.. I started through the calibration steps and all power supplies are adjusted to spec. I move on down the list of performance / calibration steps and there are steps that involve adjusting 0v while monitoring the recorder port. This port is currently ALWAYS presenting ~13.5v.

I have tested with a scope all of the test points in the chassis and the chopper amp and first pass looks _mostly_ ok in those areas. There is one test on the chopper board, test #14 that shows no trace but all others are ok. On the Slope Amp in and out, I'm not seeing much - noise at best. I do hear noise from the mechanical chopper.

I'm assuming the digital board is ok, because the display does function, might be a naive assumption. Visually, I get an UP arrow, DB and the flashing dash.

Anyone worked on these before? Not looking for THE answer, just guidance in debugging. I'm using this manual from BAMA and have attached a few relevant clips of the schematic.


Thanks for any help,?
Bill - WW1H?
<Screenshot 2024-10-04 at 5.35.19 PM.png>
<Screenshot 2024-10-04 at 5.40.44 PM.png>
<Screenshot 2024-10-04 at 5.40.22 PM.png>
<Screenshot 2024-10-04 at 5.35.37 PM.png>
Re: Boonton 92BD Troubleshooting

 

It looked very underloved but if that's not the case I can move this post.


On Fri, Oct 4, 2024, 5:47?PM Dave Daniel via <kc0wjn=[email protected]> wrote:
There is a Boonton group.

DaveD
KC0WJN

Thanks for all the fish.
==============================
All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994)
==============================

On Oct 4, 2024, at 17:45, Bill Berzinskas via <bberzinskas=[email protected]> wrote:

?
Boonton stuff ok in this group?? If not, I can delete.? ??

I picked up a mostly dead Boonton 92BD RF Millivoltmeter, seemed like a handy tool should i get it working. I've replaced the electrolytics and one of the LM723 regulators bringing back _some life_.. I started through the calibration steps and all power supplies are adjusted to spec. I move on down the list of performance / calibration steps and there are steps that involve adjusting 0v while monitoring the recorder port. This port is currently ALWAYS presenting ~13.5v.

I have tested with a scope all of the test points in the chassis and the chopper amp and first pass looks _mostly_ ok in those areas. There is one test on the chopper board, test #14 that shows no trace but all others are ok. On the Slope Amp in and out, I'm not seeing much - noise at best. I do hear noise from the mechanical chopper.

I'm assuming the digital board is ok, because the display does function, might be a naive assumption. Visually, I get an UP arrow, DB and the flashing dash.

Anyone worked on these before? Not looking for THE answer, just guidance in debugging. I'm using this manual from BAMA and have attached a few relevant clips of the schematic.


Thanks for any help,?
Bill - WW1H?
<Screenshot 2024-10-04 at 5.35.19 PM.png>
<Screenshot 2024-10-04 at 5.40.44 PM.png>
<Screenshot 2024-10-04 at 5.40.22 PM.png>
<Screenshot 2024-10-04 at 5.35.37 PM.png>
Re: Boonton 92BD Troubleshooting

 

¿ªÔÆÌåÓý

There is a Boonton group.

DaveD
KC0WJN

Thanks for all the fish.
==============================
All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994)
==============================

On Oct 4, 2024, at 17:45, Bill Berzinskas via groups.io <bberzinskas@...> wrote:

?
Boonton stuff ok in this group?? If not, I can delete.? ??

I picked up a mostly dead Boonton 92BD RF Millivoltmeter, seemed like a handy tool should i get it working. I've replaced the electrolytics and one of the LM723 regulators bringing back _some life_.. I started through the calibration steps and all power supplies are adjusted to spec. I move on down the list of performance / calibration steps and there are steps that involve adjusting 0v while monitoring the recorder port. This port is currently ALWAYS presenting ~13.5v.

I have tested with a scope all of the test points in the chassis and the chopper amp and first pass looks _mostly_ ok in those areas. There is one test on the chopper board, test #14 that shows no trace but all others are ok. On the Slope Amp in and out, I'm not seeing much - noise at best. I do hear noise from the mechanical chopper.

I'm assuming the digital board is ok, because the display does function, might be a naive assumption. Visually, I get an UP arrow, DB and the flashing dash.

Anyone worked on these before? Not looking for THE answer, just guidance in debugging. I'm using this manual from BAMA and have attached a few relevant clips of the schematic.


Thanks for any help,?
Bill - WW1H?
<Screenshot 2024-10-04 at 5.35.19 PM.png>
<Screenshot 2024-10-04 at 5.40.44 PM.png>
<Screenshot 2024-10-04 at 5.40.22 PM.png>
<Screenshot 2024-10-04 at 5.35.37 PM.png>
Boonton 92BD Troubleshooting

 

Boonton stuff ok in this group?? If not, I can delete.? ??

I picked up a mostly dead Boonton 92BD RF Millivoltmeter, seemed like a handy tool should i get it working. I've replaced the electrolytics and one of the LM723 regulators bringing back _some life_.. I started through the calibration steps and all power supplies are adjusted to spec. I move on down the list of performance / calibration steps and there are steps that involve adjusting 0v while monitoring the recorder port. This port is currently ALWAYS presenting ~13.5v.

I have tested with a scope all of the test points in the chassis and the chopper amp and first pass looks _mostly_ ok in those areas. There is one test on the chopper board, test #14 that shows no trace but all others are ok. On the Slope Amp in and out, I'm not seeing much - noise at best. I do hear noise from the mechanical chopper.

I'm assuming the digital board is ok, because the display does function, might be a naive assumption. Visually, I get an UP arrow, DB and the flashing dash.

Anyone worked on these before? Not looking for THE answer, just guidance in debugging. I'm using this manual from BAMA and have attached a few relevant clips of the schematic.


Thanks for any help,?
Bill - WW1H?

Screenshot 2024-10-04 at 5.35.19 PM.png
Screenshot 2024-10-04 at 5.40.44 PM.png
Screenshot 2024-10-04 at 5.40.22 PM.png
Screenshot 2024-10-04 at 5.35.37 PM.png

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 ) ?

 

Here's one from 2015.? It seems they omitted the Food black two or Black 7984 (a complex diazo dye) which is cataloged by NIH. Not sure if it is the same since it says proprietary and does not give a CAS #.? ? Probably because they stopped using it as it is not permitted for use in the US and Europe.? As Roy said, the MSDS will likely only list the hazardous materials.? It is a good starting point though.??
?
If the dye is anything like Black 7984, you're going to have a tough time resolving that with GC-MS.? At 800 g/mol, that is going to be tough to sufficiently vaporize.? You might be better off with LC-MS to characterize the dye and then GC-MS for the smaller residual and volatiles.
?
-Frank
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 ) ?

 

On Wed, Oct 2, 2024 at 10:17 AM, gren wrote:
Possibly the MSDS
HP MSDS data for 2002, for 51604A Black

Component/Substance CAS Number ?EU Number % by Weight
Ethylene glycol ? 107-21-1 203-473-3 <35%?
Triethylene glycol 112-27-6 203-953-2 <15%?
Food Black 2 acid salt confidential confidential <6%
Water 7732-18-5 231-791-2 > 50%?
note that the secret sauce is the Food Black 2 @ acid salt combo. They are not fessing up to what the 'acid salt is' or how much of it is used.
?
2002 is relatively recent; but, older MSDS might even be less informative... as they are only required in them... new or old... to mostly list 'hazardous' materials... and one man's hazard is another man's fun, on YouTube.
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 ) ?

 

Are you asking for someone to do this for free for you? As a favor?? I don't know how much experience you have with GC-MS (I worked as an analytical chemist for years) but there's a lot of work that goes into developing a method to run your sample.? Also, without having the standards required, GC-MS will only tell you what analytes are in your sample; it will not tell you in what concentrations unless you perform additional method development.? That means performing linearity, precision, and accuracy studies (i.e. validation) so that you can quantify the amount in the sample using known standards.? All this to say, this takes a lot of work and it isn't cheap.? So if this is something you were planning to pay for, then you can look up any number of GC-MS labs online that offer services to the public to do this kind of work.
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 ) ?

 

?
?
-- Am? Still?? Looking for anyone able to do GC or GC-MS .... on the Hp black ThinkJet inks:
?
I am trying to experiment on the inks & the printer for various purposes...
?
? So knowing ? what,? ? & [?? ]'s?? are? actually? in the Hp 51604a & Original Hp 9226a
?
??? would help !
?
thank you,
rick
?
**
Anyone have access to a GC-MS lab that might want to elucidate the ThinkJet ink adventure ?
?
Expected major components in the ?Hp 51604A ?Thinkjet black ink cartridge:
? ?( ?3.0mL to 3.7mL ; 0.13 fOz)
?
2-Pyrrolidone
Ethelyne Glycol
Food Back 2
Acid Salt 3
water
?
UFI: 6UE7 - CQTV -A205 - GHXV
?
Possibly the MSDS ?(Materials Safety) data sheet ( inserted into product box ), might have additional information ?
?
.... but would be nice to have the GC-MS results,
?
?
?
Looking for POWER keycap for 3586B

 

Anyone got a parts mule? ?I am looking for the Power button keycap for the 3586B. ?This is the standard "shadow" switch type keycap approximately 0.55 inch x 0.325 inch. ?The old one got lost probably when someone chucked this unit into an e-cycling dumpster. ?I replaced the switch, but need the cap. ?Otherwise the unit is working as intended, and passes all calibrations. ?Cosmetic only, I know.
--
Tim Wright
Senior Engineer
Cumulus Media Chicago - WLS-AM
AL7DS
Re: problems with an E4407B spectrum analyzer

 

¿ªÔÆÌåÓý

Hej Peter

Pr?v og ring til mig

Mvh

Hardy

?

Fra: [email protected] <[email protected]> P? vegne af Peter Hansen
Sendt: 4. oktober 2024 11:00
Til: [email protected]
Emne: [HP-Agilent-Keysight-equipment] problems with an E4407B spectrum analyzer

?

Hi guys I am trying to learn about the ESA 4407B analyzer. I have "bricked" a unit. I pressed ESC + view/trace key during powerup. So the EEprom is erased. I need to enter new firmware now.

But it will not take my floppy(s). It starts to blink the light on the floppy but nothing then happens. Unit has option B72 so the EEProm size is 12Mb to store the firmware. The unti was working before the upgrade. What I am doing wrong how can I load new firmware.

?

best regards OZ1LPR
Re: 8131A Error F500

 

¿ªÔÆÌåÓý

Hi,

?

Swapping the cards between the two instruments is a good idea, you will have a better idea which cards are faulty. And if you have a fully functional generator, you can work on the first one in your spare time.

Now is there any impact on the calibration, you will know if you do some performance test measurements (service manual section 4).

There are also adjustments on the output card if necessary (service manual section 3).

For the timing board, this alignment is done in the factory only according to the manual.

?

?

?

I assume you already have the manuals, but here is a link anyway.

Yesterday I uploaded both the user's and service guide to the site.

?

/g/HP-Agilent-Keysight-equipment/files/All%20HP,%20Agilent%20and%20Keysight%20instruments%20in%20folders%20by%20part%20numbers/8000%20to%208999/8131A%20High%20speed%20pulse%20generator%20%28pulse%20width%20500%20ps%20to%2099.9%20ms%29

?

Yves

?

?

De?: [email protected] <[email protected]> De la part de vee-dub565 via groups.io
·¡²Ô±¹´Ç²â¨¦?: 4 octobre 2024 05:59
??: [email protected]
Objet?: Re: [HP-Agilent-Keysight-equipment] 8131A Error F500

?

Yes that's true, I may have been a bit hasty. I had a brief look at it today and Channel 2 does indeed work correctly. I also found that channel 1 although it has the same error code as my existing 8131A it appears to be a different fault.?

?

Unit 1 (single channel) - Channel 1 just outputs DC, the DC level varies as the output level is changed.

Unit 2 (dual channel) - Channel 1 does output a pulse/square wave, but at a reduced amplitude from what it should be. Channel 2 works normally.?

?

With Unit 1 I 100% know the fault is on the timing board as I tested the other boards in a known good working unit I borrowed. I don't know if it's a fault that affects both channels as it's only a single channel unit. I'll have to try it with an extra output board and see if it throws an error for channel 2 as well (E404)

?

With unit 2 the fault could be on the timing board or output board, I haven't got into it yet. It's possible the output board is at fault here. So I maybe able to take the known good output board from the first unit and fit it to this one to fix it.? Admittedly wouldn't be learning much, but at least it would work.?

?

?

Unit 2 also has a defective power button (it won't stay latched pushed in), some sticky front panel buttons, an old schaffner filter, and rather sluggish fans. All of these are good in the first unit so definitely going to be swapping bits around to make one good unit.??

?

?

?

?
Re: problems with an E4407B spectrum analyzer

 

¿ªÔÆÌåÓý

Hi,

In my case I did not have the B72 option.

I had bought and installed the missing circuits on the flash card and repositioned a jumper.

I also used an old PC under XPpro to create the diskettes.

But during the installation there were difficulties with the loader diskette and another diskette during the second attempt.

I had recreated another diskette kit and everything had worked fine.

Don't worry too much, you will eventually get there

?

Yves

De?: [email protected] <[email protected]> De la part de Peter Hansen
·¡²Ô±¹´Ç²â¨¦?: 4 octobre 2024 05:00
??: [email protected]
Objet?: [HP-Agilent-Keysight-equipment] problems with an E4407B spectrum analyzer

?

Hi guys I am trying to learn about the ESA 4407B analyzer. I have "bricked" a unit. I pressed ESC + view/trace key during powerup. So the EEprom is erased. I need to enter new firmware now.

But it will not take my floppy(s). It starts to blink the light on the floppy but nothing then happens. Unit has option B72 so the EEProm size is 12Mb to store the firmware. The unti was working before the upgrade. What I am doing wrong how can I load new firmware.

?

best regards OZ1LPR
Re: 8131A Error F500

 

Here's a link I found online to the service manual for 8131A if you don't have it already. ? https://www.doe.carleton.ca/~nagui/labequip/datagen/8131A_Service%20Manual.pdf
Re: E8401A VXI Mainframe Power Supply

 

That's what I first thought - no signs or smell. I took the filter out and nothing suspicious on the outside.
?
Thx, Wolfgang
Re: problems with an E4407B spectrum analyzer

 

¿ªÔÆÌåÓý

Hi Peter,

I have used second option Razvan mentioned to upgrade my 4402B (after upgrading flash module by soldering 2 more memory chips).


What I did:

1. download A.14.06 firmware package (.exe) from Keysight (or A.07.06 version for smaller 8MB flash option)

2. create 9 floppy disks - I used old WinXP computer with internal floppy drive (tried external USB connected floppy drive but it didn't work) to run exe file from keysight, some feature sw packages are also downloadable in exe form and this exe writes it to floppy disks

3. erase flash by holding ESC + view/trace key during turn-on

4. wait 10 minutes for flash erase completion, then turn off analyser by disconnecting power plug (power button doesn't work)

5. for a while disconnect battery what is placed on CPU board - this will clear NVRAM but you wont loose any hardware based options (software based will have to be enabled again after firmware installation with appropriate pass keys)

6. insert floppy disk 1 with bootloader and turn analyser on

You should see that floppy drive will start reading disk, it will take 20-30s, then it will display bootloader on the screen and will show you what to do next. If floppy drive will try to read disk just for few seconds and then nothing happens, something is wrong - dirty floppy drive, incorrectly created or faulty floppy disk, or....


Vladimir


Hello Peter,

The E4407B is not having EEPROMs, it has NAND flash memory. In total
there are 4 NAND chips, one is on the CPU board soldered directly there
and the other 3 are on a so called Flash SIMM board parallel to the RAM
memory stick. Each NAND chip is 4MB in size for the total of 16MB flash
if you have B72 option.

Now for the floppy disks. First disk is the called LOADER disk and this
is a little bit tricky since it needs to be written in a way that the SA
will read it.

You can try the following 2 options:
1) format the floppy on the analyzer and after that move it to PC and
copy the LOADER files.

2) use an old PC/Laptop with windows xp/2000 and run the .exe file that
makes all disks. It will not work on newer windows machines.

I think point 1) you cannot try because you already formatted the NAND
flash and the analyzer will not boot now...

Try second one with the old windows xp or windows 2000.

Regards,
Razvan

On 04/10/2024 10:59, Peter Hansen via groups.io wrote:
Hi guys I am trying to learn about the ESA 4407B analyzer. I have
"bricked" a unit. I pressed ESC + view/trace key during powerup. So the
EEprom is erased. I need to enter new firmware now.
But it will not take my floppy(s). It starts to blink the light on the
floppy but nothing then happens. Unit has option B72 so the EEProm size
is 12Mb to store the firmware. The unti was working before the upgrade.
What I am doing wrong how can I load new firmware.

best regards OZ1LPR
_._,_._,_





Re: problems with an E4407B spectrum analyzer

 

Hello Peter,

The E4407B is not having EEPROMs, it has NAND flash memory. In total
there are 4 NAND chips, one is on the CPU board soldered directly there
and the other 3 are on a so called Flash SIMM board parallel to the RAM
memory stick. Each NAND chip is 4MB in size for the total of 16MB flash
if you have B72 option.

Now for the floppy disks. First disk is the called LOADER disk and this
is a little bit tricky since it needs to be written in a way that the SA
will read it.

You can try the following 2 options:
1) format the floppy on the analyzer and after that move it to PC and
copy the LOADER files.

2) use an old PC/Laptop with windows xp/2000 and run the .exe file that
makes all disks. It will not work on newer windows machines.

I think point 1) you cannot try because you already formatted the NAND
flash and the analyzer will not boot now...

Try second one with the old windows xp or windows 2000.

Regards,
Razvan

On 04/10/2024 10:59, Peter Hansen via groups.io wrote:
Hi guys I am trying to learn about the ESA 4407B analyzer. I have
"bricked" a unit. I pressed ESC + view/trace key during powerup. So the
EEprom is erased. I need to enter new firmware now.
But it will not take my floppy(s). It starts to blink the light on the
floppy but nothing then happens. Unit has option B72 so the EEProm size
is 12Mb to store the firmware. The unti was working before the upgrade.
What I am doing wrong how can I load new firmware.

best regards OZ1LPR
_._,_._,_
3961 - 3980 of 151184