Re: Make backup PCMCIA card for E8285A?
Hi,
The mian issue is having software that works in linear mode. I use Windows 98 or XP and ELAN MCE. Not sure if MCE will work under Windows 3.1
Robert.
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Re: HP 3330B Logic boards
Hi Jeff, ? Could you contact me off-list I¡¯ve tried to send you a PM but your mail is masked on groups.io and the only other address I have is your paypal address. You can reach me on hp-fix_ad_xs4all.nl ? -Rik ?
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Van: [email protected] < [email protected]> Namens Jeff Kruth via Groups.Io Verzonden: donderdag 18 april 2019 14:00 Aan: [email protected]Onderwerp: Re: [HP-Agilent-Keysight-equipment] HP 3330B Logic boards ? I am about to begin the process of scrapping two complete 3330B units for gold content. Let me know if you dont find what you need.? I gave up trying to find a home for these. I used to have the complete setups with the 5370 NA and 5371 SA. In a message dated 4/16/2019 2:57:06 PM Eastern Standard Time, hp-fix@... writes: I¡¯ve acquired a nice HP 3330B Automatic Synthesizer after some testing it started up with a wrong value on the amplitude display. Some testing revealed some other quirks when I want to alter the frequency it displays the input on the amplitude display and changing the frequency and amplitude with the up down keys also gives strange results on the display, also some other keys don¡¯t work as they should. After some searching, I¡¯m convinced something is wrong in one of the processor boards. I¡¯ve looked with the logic analyzer and can see the logic is starting up as it should it follows the state diagrams in the same order as in the service manual.
I¡¯ve tested measured a lot and can¡¯t find the fault at the moment, so I¡¯m looking for a working set of logic board (A7 ALU board and A8 control board) and if some body have them an image of the control roms (4 x 256bit ROMS) so I can check these against the images I¡¯ve made of my ROM¡¯s (82S126 compatible). If someone has a set of boards ?(A8, HP 03330-66575 and A7, HP 03330-66507) and/or the rom images, that would be very nice and should make me possible to fix the 3330B so I can use it in conjunction with the HP3570A to restore a HP 3041A VNA. ? -Rik ?
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Re: HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked
Oops, I replied to an earlier post - the more recent ones were not showing on my PC at the time. It looks like you've already been down the power supply checking road. If the power is good, then the problem must be in the oscillator itself, so again, a loose or intermittent item could do it. If you have the unit removed, shake it and see if anything rattles inside, before you open it up.
I've never opened one of these, but I believe the oscillator topology is a common type with an NPN bipolar microwave transistor with grounded-base, biased up for negative resistance into the resonator. The -10V through a resistance sets more or less constant DC emitter current through the transistor, while the +20V is applied to the resonator structure and collector. The supply currents you mentioned indicate this possibility - the emitter current should be slightly large than collector, accounting for the base current into ground. With your numbers, it looks like the DC current gain is around 30, so the transistor seems intact DC-wise.
If it was a MESFET-based design, the -10V supply current would likely be small, just to bias the gate, while the drain to (grounded) source current from the +20V would be whatever it was supposed to be.
Ed
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Re: Existing HP 70K, HP 7000 thread on EEVBlog, was .... Keypad for 70820A module,
Hi could you please post a link to the EEV blog
regards? 70000 user?
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Re: HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked
The current draws seem about right. Did you check for line ripple on the supplies already? If you get two frequencies apparently simultaneously, this could be caused by severe modulation of the supplies. Also, in some applications of this oscillator type in other instruments, there may be a bias control regulator for the oscillator to fine tune it via collector (+) supply variation, or with a varactor in the cavity (there would be another feedthrough connection for this). I don't know what's in this model, but there may be some more stuff involved.
If the supplies are OK, and it simply jumps between two frequencies while adjusting the cavity, I'd suspect a loose or intermittent part inside.
Ed
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wanted service manual and clips for a HP 8592A
hi all
looking for service manual and clips for a HP 8592A 22 ghz spectrum analyzer
Best regards Paul Bicknell? England?
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Re: HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked
Hello,
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On Mon, Apr 22, 2019 at 03:42 AM, jfphp wrote:
Open the cavity and see if there are signs of corrosion -- frequent problem-- Put it out and try with a known good power supply. Did you change both capacitors ? Then the transistor in the cavity is defective
--------------------------------------------
Many thanks for the comment! Tried with separate power supplies and got the same result. The currents indicated that the caps were working.?
Do you have a recommendation on how to remove the oscillator? What other parts need to be taken away? It's mentioned in the manual that the A16 modulator is sensitive to static discharge - I guess this is related to the gate bias lines? Is it necessary to remove the A16 and A16A1?
What kind of transistor is there in the cavity - packaged or bare die? Do you know if there are replacements available?
I'm thinking of replacing the complete oscillator with a synthesized source instead. Perhaps easier than fixing this oscillator?
Regards,
? Staffan
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Re: Make backup PCMCIA card for E8285A?
Robert:
You said an old computer might be able to read the card.
I have an old Compac Laptop from 1993. Windows 3.1 It has a PCMCIA port. Should the ROM/RAM PC cards work with it??
Wally KC9INK?
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Re: HP 53310A POST errors
Hello Jack,
I would recap them - the Boeschert cartridges are known to be,
um, leaky.
Tam
On 2019. 04. 22. 17:53, Jack2015 wrote:
Tam,
I had switched the power supply of 53310A with my HP1650A for
couple days.
nothing changed.thus I decided to look somewhere else.
Jack
--
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
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Re: HP3457A missing power button
If it's the same size button as the 3468A/3478A, there's a 3D printable part which will do the job.
http://www.eevblog.com/forum/testgear/list-your-test-equipment-score-here!/msg1255227/#msg1255227
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Re: HP 53310A POST errors
Tam,
I had switched the power supply of 53310A with my HP1650A for couple days.
nothing changed.thus I decided to look somewhere else.
Jack
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Re: Make backup PCMCIA card for E8285A?
What data / software are you trying to backup and what format are the files from Amtronix.
I may be able to write them to a FLASH card or you. I can supply FR tools on FLASH if anyone needs it.
Robert G8RPI
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Re: Make backup PCMCIA card for E8285A?
Hi,
I have actually done this with the older 892xB testset (the E8285A is the same generation) and am confident in my comments above. The earlier test sets are NOT PC based so will not work with cards formatted as ATA PC drives. The E7495 is probably PC based so will work with ATA cards.
The older units used "dumb" cards with no on-board controllers, they treat the cards as RAM or ROM (not PROM or EEPROM). This is because the 892xA series were based on th 892xA series that used EPSON NVRAM or PROM cards with side (edge) connections. The controller architecture did not change with the move to PCMCIA, just the card connector.
Robert G8RPI.
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Re: Service notes library on microfiche (5951-6511)
Still trying to find any information on these service notes microfiche sets. Seem to be really rare.?
Thank you,
Wolfgang, KI7PFX
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On Sun, Apr 7, 2019 at 08:07 AM, Wolfgang Schraml wrote:
Below an example of the reference to the service notes library from the 1992 2nd,?3rd. 4th Quarter Bench Briefs:
Thank you,
Wolfgang Schraml, KI7PFX
--------------------------------------------------------------------------------
On Thu, Mar 28, 2019 at 11:38 PM, Wolfgang Schraml wrote:
I have seen a service notes library referenced in many?of the older "Bench Briefs". Part number was 5951-6511 or H5320A.?
There was also a subscription service that could be ordered under part number 5951-6517 or H5299A.
Has anyone ever seen one of these microfiche packages? I keep looking on eBay but no success so far.
Thank you,
Wolfgang, KI7PFX
?On Thu, Mar 28, 2019 at 11:38 PM, Wolfgang Schraml wrote:
H5320A
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Re: HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked
Tin whiskers in cavity?
Sent from my 20" Texas sized
iPhone....
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On Apr 22, 2019, at 5:42 AM, jfphp via Groups.Io <jfphp@...> wrote:
Open the cavity and see if there are signs of corrosion -- frequent problem-- Put it out and try with a known good power supply. Did you change both capacitors ? Then the transistor in the cavity is defective
--------------------------------------------
On Mon, 4/22/19, Staffan <testjarfalla63@...> wrote:
Subject: Re: [HP-Agilent-Keysight-equipment] HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked
To: [email protected]
Date: Monday, April 22, 2019, 9:21 AM
Hello,
On Sat, Apr 20, 2019 at 02:37
PM, jfphp wrote:
In the 8359XX plug ins, the cavity oscillator is
not phase locked and there is only a plunger adjustement
with a screw.
--------------------------------------------
Yes, noted it. Don't know how much it
will do to help in this case. Disconnected the bias lines
and hooked the output to a spectrum analyzer. Output is
either at 3.522 GHz and -16 dBm or 3.830 GHz and -1 dBm so
at least power level is far from the expected +9 dBm.
The current draw on the +20 and -10 V bias
lines is +27 and -28 mA - anyone knows whether this is
normal or not? It seems like current draw is governed by the
-10 V supply.
Anyone has a
schematic of the oscillator? Anyone has repaired this
oscillator before?
Regards,
Staffan
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Re: HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked
Open the cavity and see if there are signs of corrosion -- frequent problem-- Put it out and try with a known good power supply. Did you change both capacitors ? Then the transistor in the cavity is defective
--------------------------------------------
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On Mon, 4/22/19, Staffan <testjarfalla63@...> wrote: Subject: Re: [HP-Agilent-Keysight-equipment] HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked To: [email protected] Date: Monday, April 22, 2019, 9:21 AM Hello, On Sat, Apr 20, 2019 at 02:37 PM, jfphp wrote: In the 8359XX plug ins, the cavity oscillator is not phase locked and there is only a plunger adjustement with a screw. -------------------------------------------- Yes, noted it. Don't know how much it will do to help in this case. Disconnected the bias lines and hooked the output to a spectrum analyzer. Output is either at 3.522 GHz and -16 dBm or 3.830 GHz and -1 dBm so at least power level is far from the expected +9 dBm. The current draw on the +20 and -10 V bias lines is +27 and -28 mA - anyone knows whether this is normal or not? It seems like current draw is governed by the -10 V supply. Anyone has a schematic of the oscillator? Anyone has repaired this oscillator before? Regards, ? Staffan
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Re: HP83592A 0.01 - 20 GHz RF plugin cavity oscillator unlocked
Hello,
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Show quoted text
On Sat, Apr 20, 2019 at 02:37 PM, jfphp wrote:
In the 8359XX plug ins, the cavity oscillator is not phase locked and there is only a plunger adjustement with a screw.
--------------------------------------------
Yes, noted it. Don't know how much it will do to help in this case. Disconnected the bias lines and hooked the output to a spectrum analyzer. Output is either at 3.522 GHz and -16 dBm or 3.830 GHz and -1 dBm so at least power level is far from the expected +9 dBm. The current draw on the +20 and -10 V bias lines is +27 and -28 mA - anyone knows whether this is normal or not? It seems like current draw is governed by the -10 V supply. Anyone has a schematic of the oscillator? Anyone has repaired this oscillator before? Regards, ? Staffan
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Re: HP 53310A POST errors
Hello, well. This is very strange, all of it. When your unit locks up, do the LEDs keep marching? Just powered on mine again, and he is a happy camper. IMHO, one of us needs to look at the schematics of the power supply card and find out what can halt the CPU startup. I would do it, but am already going to bed for today. Someone at eevblog mentioned a 5V lockout circuit, which could also malfunction of course. Also, let us start with the basics. Was the power supply recapped? Tam
With best regards Tam HANNA (emailing on a BlackBerry PRIV) Enjoy electronics? Join 14k other followers by visiting the Crazy Electronics Lab at Am 22. April 2019 06:22:17 MESZ schrieb Jack2015 <tolkien@...>:
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Tam,
I will try to replace the NVRAM when same issue comes back.
but don't expect too much on it because my 53310A restores last panel settings at powering up.
Jack
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Re: HP 53310A POST errors
Tam,
I will try to replace the NVRAM when same issue comes back.
but don't expect too much on it because my 53310A restores last panel settings at powering up.
Jack
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Re: Make backup PCMCIA card for E8285A?
Bill and Robert:
I spent a lot of time on this problem and got nowhere. If anyone could explain to me what I did wrong I would be very happy
I tried lots of ways to read the cards. I do not recall using Memory Card Explorer. Perhaps that is the trick.
I could easily be entirely wrong but:
I think the Centennial cards used with the HP units use something like supersign driver to read them
SuperSign_PQ-00-03_PLAYER%28v1.1.0.1%29_C.wim
I tried this with two different? old computers with PCMCIA ports. Including one with Windows 3.1
Nothing worked. One computer got so far as to identify the card as DOS but I do not remember this well.
Anyway I gave up.
I think there is something on the card that is specific to the HP type unit otherwise, I do not know how to read it.
Maybe supersign is a way to password the PCMCIA to make it only read on the instrument it is intended for.
I have used the PCMCIA card slot for use with my E7495 to change the Linux boot files to deal with the 1024 week problem, worked just fine for that purpose. Copied and edited without a problem.
Any information would be welcome.
Wally KC9INK
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Rik Bos
Paul Bicknell