¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
  2. Messages
Expanded Topics Messages
Date
Re: HP8160A & HP E1420B Wanted

 

¿ªÔÆÌåÓý

Hi Fred

How is my Rohde & Schwarz coming along

?

From: [email protected] [mailto:[email protected]] On Behalf Of MARC CHRISTIAN
Sent: 03 February 2019 16:45
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP8160A & HP E1420B Wanted

?

Dear Group - Looking To Buy HP8160A Pulse Generator & HP E1420B VXI Module if any Member has available.

?? Regards
?????? Marc Christian

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
Re: HP 3314A - experience

 

¿ªÔÆÌåÓý

Regarding ?HP 3314 exhalant bit of kit? ?it is also a VCO?

?

If you are repairing hp equipment of that generation you must get a HP signature analyzer

Infect most of use have at lest 2 as I typically pay ?10 at radio rallies

?

Paul

?

From: [email protected] [mailto:[email protected]] On Behalf Of amirb
Sent: 03 February 2019 12:58
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 3314A - experience

?

very nice instrument with clean and precise waveforms

If I remember correctly there are 2 custom designed chips on the analog board and the rest?
one was the sine shaper I recall...they hardly fail really. the rest of the components are?
all through hole and can be found from various sources. even the custom chips show up on ebay.
in the two cases that I have repaired which were really old (~1982) the masked ROMs had failed plus the SRAMs
the masked ROMs (there were 6 of them containing the firmware) are those that are used in old Commodores (MK36000?)
so I had to make an adapter and fit in 28 pin EPROMs which is easy and the ROM images are available on internet.
The RAM chips I had to buy from china...

for troubleshooting the digital board having a signature analyzer (like Tektronix 308) is very very useful or even necessary.

the service manual is excellent


On Sun, Feb 3, 2019 at 05:51 AM, Tobias Pluess wrote:

Hi guys,
I saw a 3314A generator in very nice condition. The user says he has no way to test it. As usual :-)
I could use the 3314A's VCO and PLL capabilities. Besides that, it would come in handy as replacement for my old analog function generator.
So I wonder whether some people on the list have experience with the 3314A. Are there some common problems, are they easy to repair, or is it just a pile of unobtanium ASICs, etc.
If there are good chances for repair, I would even buy a possibly nonworking unit and repair it...

Tobias
HB9FSX


?On Sun, Feb 3, 2019 at 05:51 AM, Tobias Pluess wrote:

VCO and PLL

No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
HP8160A & HP E1420B Wanted

 

Dear Group - Looking To Buy HP8160A Pulse Generator & HP E1420B VXI Module if any Member has available.

?? Regards
?????? Marc Christian
Re: HP 3314A - experience

 

and when you do get one, hook up a speaker to the output, hold down blue (shift), "SW/TR INTVL", and "START FREQ" buttons simultaneously, turn on power, then release the buttons and....Hellelujah!

Adrian

On 2/3/2019 2:54 PM, Artekmedia wrote:
Tobias

This unit is pretty much "off the shelf "(at the time) standard discrete IC's and transistors. I do not think there is any custom silicon in there although maybe some of the Siliconix switches and things like that might be hard to source these days. Beyond that electrolytics in power supply etc

Dave
manuals@...

On 2/3/2019 5:51 AM, Tobias Pluess wrote:
Hi guys,
I saw a 3314A generator in very nice condition. The user says he has no way to test it. As usual :-)
I could use the 3314A's VCO and PLL capabilities. Besides that, it would come in handy as replacement for my old analog function generator.
So I wonder whether some people on the list have experience with the 3314A. Are there some common problems, are they easy to repair, or is it just a pile of unobtanium ASICs, etc.
If there are good chances for repair, I would even buy a possibly nonworking unit and repair it...

Tobias
HB9FSX
Re: hp 8657A

 

Get a quality scan of the diagram for starters.

From your description I cant not tell which schematic you are looking at?



Ciao
Dave
NR1DX
manuals@...

On 2/3/2019 10:58 AM, gianni vecchietti IK4EWH via Groups.Io wrote:

Since the diagram I got is so small that need the microscope to see some things, but quality is low, so at end I can't see nothing!!!!
Some suggestions?
Thanking !!!!
gianni
--
Dave
Manuals@...
www.ArtekManuals.com
Re: hp 8657A

 

really I make confusion , but helped from HP mistak:
. On PIC 8657-1 can see the write under the connector. Seeing the letter , seem that the first letter can be a M.
On secon PIC 8657-2? without connector the letter are HHZ.....(???)
Comparing with PIC 8646-3 ( another generator but 8656) is clear that are KHZ. !!!!!
At end the situation is :
on OUT 100 KHz , there is nothing
on OUT 5 MHz? ? there is nothing? .....? ?but are 5 volt that came out? from module? ?
on other machine 8556 are 2 volt and also 5 MHz....
Since the diagram I got is so small that need the microscope to see some things, but quality is low, so at end I can't see nothing!!!!
Some suggestions?
Thanking !!!!
gianni
Re: HP 3314A - experience

 

Tobias

This unit is pretty much "off the shelf "(at the time) standard discrete IC's and transistors. I do not think there is any custom silicon in there although maybe some of the Siliconix switches and things like that might be hard to source these days. Beyond that electrolytics in power supply etc

Dave
manuals@...

On 2/3/2019 5:51 AM, Tobias Pluess wrote:
Hi guys,
I saw a 3314A generator in very nice condition. The user says he has no way to test it. As usual :-)
I could use the 3314A's VCO and PLL capabilities. Besides that, it would come in handy as replacement for my old analog function generator.
So I wonder whether some people on the list have experience with the 3314A. Are there some common problems, are they easy to repair, or is it just a pile of unobtanium ASICs, etc.
If there are good chances for repair, I would even buy a possibly nonworking unit and repair it...

Tobias
HB9FSX
--
Dave
Manuals@...
www.ArtekManuals.com
Re: Help to fix power supply (A80) of an old HP 3586A

 

Nicad battery juice must be neutralized with a weak
acid. I use clear distilled vinegar straight from
the bottle. A toothbrush helps. Let it soak until
it stops fizzing, brush it a bit, and then rinse
with water... preferably deionized.

Any solder mask that comes off has nicad juice under
it, and must be removed anyway, so don't sweat it.

Dry with compressed air to remove *all* of the water
droplets, and then put it in a warm dry place for
several hours. I use a convection oven set to 50C.

Degreaser is good for removing grease. This isn't
grease, but rather a very strong alkali (KOH) and
copper hydroxide. The KOH won't stop eating the
copper traces until it and the traces are totally
consumed.

Simple green is another cleaner that is loaded with
butyl cellosolve. Avoid using it on plastics.

-Chuck Harris

cc@... wrote:

Hi,
I tried with simple green degreaser diluted with distilled water but after 12h I still notice the residues from the old battery. The old battery is a NiCd ... so is a normal degreaser enough to remove that green residues in your opinion?

Now I am going to try a second wash with the same degreaser but with a warm water and brushing. Below I highlight with red arrows some points:

Attachments:
IMG_1708.jpg: /g/HP-Agilent-Keysight-equipment/attachment/94091/
Re: hp 8657A

 

i Check better.....
Re: Help to fix power supply (A80) of an old HP 3586A

 

Hi,
I tried with simple green degreaser diluted with distilled water but after 12h I still notice the residues from the old battery. The old battery is a NiCd ... so is a normal degreaser enough to remove that green residues in your opinion?

Now I am going to try a second wash with the same degreaser but with a warm water and brushing. Below I highlight with red arrows some points:
Re: HP 3314A - experience

 

very nice instrument with clean and precise waveforms

If I remember correctly there are 2 custom designed chips on the analog board and the rest?
one was the sine shaper I recall...they hardly fail really. the rest of the components are?
all through hole and can be found from various sources. even the custom chips show up on ebay.
in the two cases that I have repaired which were really old (~1982) the masked ROMs had failed plus the SRAMs
the masked ROMs (there were 6 of them containing the firmware) are those that are used in old Commodores (MK36000?)
so I had to make an adapter and fit in 28 pin EPROMs which is easy and the ROM images are available on internet.
The RAM chips I had to buy from china...

for troubleshooting the digital board having a signature analyzer (like Tektronix 308) is very very useful or even necessary.

the service manual is excellent


On Sun, Feb 3, 2019 at 05:51 AM, Tobias Pluess wrote:
Hi guys,
I saw a 3314A generator in very nice condition. The user says he has no way to test it. As usual :-)
I could use the 3314A's VCO and PLL capabilities. Besides that, it would come in handy as replacement for my old analog function generator.
So I wonder whether some people on the list have experience with the 3314A. Are there some common problems, are they easy to repair, or is it just a pile of unobtanium ASICs, etc.
If there are good chances for repair, I would even buy a possibly nonworking unit and repair it...

Tobias
HB9FSX

?On Sun, Feb 3, 2019 at 05:51 AM, Tobias Pluess wrote:
VCO and PLL
Re: HP8714ET Suggestions

 

yes, that's right. when doing the CAL you should select 50ohm from the CAL menu.




On Sun, Feb 3, 2019 at 07:37 AM, Steve Hendrix wrote:
The collective knowledge and willingness to help is positively
awesome in this group!

So if I'm understanding correctly, assuming I would only ever want to
work in a 50 ohm environment with my 75 ohm HP8714ET, I would buy the
minimum-loss pads to convert both ports to 50 ohms, and a 50 ohm cal
kit. I would also want to select 50 ohm normalization in the menus so
the Smith chart is centered at 50 ohms, etc. Am I understanding that correctly?

Steve Hendrix

?On Sun, Feb 3, 2019 at 07:37 AM, Steve Hendrix wrote:
willingness
Re: HP8714ET Suggestions

 

The collective knowledge and willingness to help is positively awesome in this group!

So if I'm understanding correctly, assuming I would only ever want to work in a 50 ohm environment with my 75 ohm HP8714ET, I would buy the minimum-loss pads to convert both ports to 50 ohms, and a 50 ohm cal kit. I would also want to select 50 ohm normalization in the menus so the Smith chart is centered at 50 ohms, etc. Am I understanding that correctly?

Steve Hendrix
HP 3314A - experience

 

Hi guys,
I saw a 3314A generator in very nice condition. The user says he has no way to test it. As usual :-)
I could use the 3314A's VCO and PLL capabilities. Besides that, it would come in handy as replacement for my old analog function generator.
So I wonder whether some people on the list have experience with the 3314A. Are there some common problems, are they easy to repair, or is it just a pile of unobtanium ASICs, etc.
If there are good chances for repair, I would even buy a possibly nonworking unit and repair it...

Tobias
HB9FSX
Re: Unleveled E4436B

 

You are right, Colby, replacement motherboards do not have model number and serial number programmed - they are christened by PC software allowing one-off field programming (this is PC software restriction.) The rest of the modules are not model-specific (within a group, of course.)

I was accidentally involved in helping few Tek 2467 owners find out that they have bought modded and rebadged 2465B. /g/TekScopes/topic/2465b_vs_2467/7652505? It is almost the same but not quite the same when you look at pulse response carefully.?

This group is public - anybody can now convert E4434B into E4437B for the cost of a plastic fascia plastic badge.? I doubt your average eBay chancer would care that calibration got blasted in the process. Cal labels stay intact in the process - that's all that matters for eBay.? I wouldn't want to inadvertently facilitate this even if I upset good people in the process.? It's really an ethical question rather than technical.

Leo
Re: Unleveled E4436B

 

From HP/Agilent, if a part has the same model number, it has full capabilities. You can expect that all models are capable of 4GHz. it is just some form of "licensing". More money, more GHz or options.

And thank You for the information. I will test it the next week, and try to figure out what is changed in the ROMs. Maybe it is possible to do this without loosing CAL.

Peter
Re: HP 3490A repair

 

¿ªÔÆÌåÓý

Good morning Greg,

Congratulations for a job well done. If you're serious about restoring old and venerable instruments, you've got to read this chapter "The importance of fixing" by the late Jim Willams:



And you'll be convinced you're not alone. Welcome to the group, and I can't wait to hear more about your 34702/34740, more fun is on the way !

Have a great Sunday,

Joel

Virus-free.

Re: HP8714ET Suggestions

 

it seems I was thinking too hard and making it too complicated!
https://

of course the situation in this thread is the opposite (75 to 50)
Re: HP 3490A repair

 

On 2/2/19 6:22 PM, gregdunn@... wrote:
Yes it was U3.? Clean display now, with no extra dots to mar its
beauty.? Time to let it warm up and see how close it is to my three
reference sources.

And the next unit is in fact a 34702A with its companion 34740A.?
Working, except ohms mode deviates further from correct values at higher
and higher resistances.? I've done some troubleshooting on it already
and suspect the current source - but I'll post that in its own thread soon.

Meanwhile, many thanks for the cross-confirmation and encouragement!? I
now have four working pieces of vintage HP gear.
Absolutely gorgeous. Nice work!

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: HP8714ET Suggestions

 

¿ªÔÆÌåÓý

Hmmm, interesting question. I have a 75 ohm test set for my VNA, but don¡¯t think I have those pads to try that out.?


Peter

On Feb 2, 2019, at 10:52 PM, amirb <amir.borji@...> wrote:

yes these seem pretty good

but with regard to the CAL kit, my understanding is that the when you do OSLT calibration the way that VNA calculates and extracts the
error factors from those 4 measurements, it necessarily assumes that the the characteristic impedance from the VNA port surface all the way to the DUT ports
is constant (75 or 50). when you have a 75-to-50 pad in between it messes up the error calculations, I might be wrong about this though...

On Sat, Feb 2, 2019 at 10:41 PM, Peter Gottlieb wrote:
I would just leave the minimum loss pads in there all the time. Minicircuits
makes decent enough ones and they're reasonable. Something like this:



Then use the 50 ohm cal kit.



On 2/2/2019 10:29 PM, amirb wrote:
I remember I specifically mentioned to be careful about option 1EC (75ohm).
That's the reason these units are cheaper than the 50 ohm ones
I think there are minimum loss pads ( some even made by HP)? to match 75 ohm
to 50 ohm over a fairly wide bandwidth
they re N type on both ends (M to F) but kinda expensive.

forget about firmware revisions or option. the first thing you need is a good
calibration kit.
you can find cal kits for 75 ohm and do the cal in 75 ohm system and then just
add the impedance matching pads
and do your measurements and tolerate the errors introduced by the pads. But
if you connect them to the ports
and then use a 50 ohm cal kit, I don't know how that will work really. I think
for scalar measurements (just amplitude of reflection and transmission)
that's probably OK but for vector measurement I think that would be problem I
guess...I mean for accurate phase measurement...


On Sat, Feb 2, 2019 at 09:35 PM, Steve Hendrix wrote:

I finally managed to catch a nice VNA from eBay. My new HP8714ET is a bit
dirty and has seen a few bumps over its lifetime, but it seems to be fully
functional. I have downloaded a ton of documentation for it that I need to
wade thru, mostly finding out just how much I still have to learn about RF
despite working in the field for some years. A couple of quick questions,
that I'm thinking I'm unlikely to find in the manuals:

1) What are the differences between version E.06.01 (installed) and
E.06.02 (I've downloaded the files but haven't attempted to install them).

2) The unit came with 75 ohm couplings. I mistakenly expected it to be
switchable between 50 ohms and 75 ohms. Since I do most of my work at 50
ohms, is there an easy way to make that adaptation, either internally or
externally?

3) Are there additional options I should consider installing? It came with
option 100 (TDR) and 1EC (75 ohm).

Any other tips to speed my process of learning my way around this critter?

Steve Hendrix
57341 - 57360 of 151418