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Howdy folks,

? Some time ago, in this forum, I described how I repaired the contact fingers of an 8558 spectrum analyzer without taking the front panel off (the involvement and commitment of taking that panel off scared me!).? I managed to repair the thing "my way" and parted out much of it years ago.? The photos were here:?/g/HP-Agilent-Keysight-equipment/album?id=68557

? But now I need more shop space.? I want to get rid of all the remaining spare parts.? ?I have photographed what I have and I put them in a photo album here:??/g/HP-Agilent-Keysight-equipment/album?id=291560
Please let me know if you want any of these, and I will ship them to you.? I would like to keep it really simple.? $20 gets you a small flat rate box from the USPS.? I can put 2 boards in a box.? If you want all of them, please inquire.? ?If you want me to ship internationally, I'll consider it if you can't get the parts elsewhere, but please make it simple for me.

? ?Note that most of the goodies were gone years ago.? ?Just offering the rest of these parts in case someone has a more complicated repair and they need them.? The remaining parts include (going in the orders of the photos in the album):
1) Unknown.? Marked 00182-66519 - come to think of it, from the number it may be a 182T part, but it's got mini coax connectors on it... donno.
2) 8558 Log amplifier board
3) A10 2nd IF
4) 08558-60115 board
5) A9 3rd converter
6) A5 2nd converter assembly - this can fit in a small flat rate box, but not with much padding!
7) A12 Step gain assembly
8) A4 1st converter.? This part is damaged.? Looks like the previous owner attempted a bad repair, and it was hacked.? ?Sold for curiosity only.? See pics.
9) What's left of the front panel/mechanical/switch assembly PCB.? ?Missing the frequency span/resolution switch and the trigger switch.? No fingers on any of them.? See pics.

? So I hope these can be of use to someone.? ?If you are repairing a 182T and need some parts, let me know and I will post those too.?

? Thanks!

?Dan

I cannot read what the span is on the SA, is it 2MHz, or 2KHz?
If 2 KHz span, then it looks like you have 60Hz noise or spurs. For this case check or ground all your chassis together, operate them from the same power strip or outlet. Check the the power plug ground pin on each instrument’s power receptacle, and the power cord on each. Also consider placing a 1 inch or better soft foam pad or pads between the instruments in the stack (from the video).
If 2MHz span, then it looks like you have 60KHz noise or spurs. What is the FM lock loop frequency for the 5344S? What can you do to change the lock loop frequency to change the spur frequency on the SA display? Consider reducing the span, RBW’s, Video BW’s, sweep time , etc. If these changes affect the frequency of the spurs then it is related to the 5344S lock loop frequency. If the frequency is not affected by these changes then either the 8350 sweeper combo or the 5344S is causing the 60KHz modulation.

Don Bitters

Always wondered why a HPAKwiki (in the vein of TekWiki) wasnt started earlier, so good work Dave!

On 12/10/23 15:44, Reginald Beardsley via groups.io wrote:

As a practical matter I cannot hire people without specifying the task to be done and arranging for some supervision of the result. So I made up a trial statement of work without knowing anything about hpwiki.org and asked Dave if he'd host it. Dave reminded me he had one. It doesn't get enough attention for a search to return it.

You have a fundamental misunderstanding of how search engines work. People using the site do not affect search results. People searching for it and then going to it in search engine results affect search results.

That led to accusations I was fundamentally trying to change the wiki. All I was trying to do was describe in generic terms the task of creating wiki entries in *any* wiki.

First, you wanted to hire people abroad to "build" the wiki. Then you wanted me to rewrite the file upload system to enable a user to enter a URL for a manual on Keysight's web site and have my server go retrieve the file that it points to. From that point, your only focus was slurping manuals from Keysight, when it was already made clear that the intent is not to be a(nother) manual archive site.

Perhaps I misunderstood, but these seem like pretty fundamental changes to me.

Without a complete and clear explanation of the structure of the wiki, the reasoning behind it and complete examples of what a page should look like the chances of getting the desired result are a random walk. And no one is happy. Generating hundreds of malformed or incomplete pages is not helpful. They will just get deleted.

The reasoning behind it is clear. There are existing pages there that serve as the complete examples that you claim are absent. I even put together a template page to make it easier.

There are currently 73 user accounts on HPWiki. About a dozen of them have contributed pages. They didn't seem to have any trouble.

So if there are any REAL issues, I hope someone will let me know.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

Argentina has the world's highest official rate of inflation. Zimbabwe changed how they calculated theirs to put Argentina in the top spot.

I thought I'd hire some hams in Argentina at low wages to build an HPwiki with manuals, photos, etc.

As a practical matter I cannot hire people without specifying the task to be done and arranging for some supervision of the result. So I made up a trial statement of work without knowing anything about hpwiki.org and asked Dave if he'd host it. Dave reminded me he had one. It doesn't get enough attention for a search to return it.

That led to accusations I was fundamentally trying to change the wiki. All I was trying to do was describe in generic terms the task of creating wiki entries in *any* wiki.

Without a complete and clear explanation of the structure of the wiki, the reasoning behind it and complete examples of what a page should look like the chances of getting the desired result are a random walk. And no one is happy. Generating hundreds of malformed or incomplete pages is not helpful. They will just get deleted.

I thought documenting 600-800 instruments in the wiki with local copies of all the available documentation would be a nice Christmas present to all and stimulate others adding to it. But I no longer see any way to accomplish that.


My apologies to all,
Reg

Thanks
I think that's a separate thing because it is also included with 8515A but the part list for 8515A does not have 10dB pad in it (only 6dBx4 and 13dBx2)
also it is not designated at AT6. In the part list it is clearly designated at AT6 although it is not shown in the block diagram but none of the others are also shown there

On 12/10/23 11:48, Jim Adney wrote:

Long term sustainability is the most important factor. In my mind, the critical part of this is that there are at least TWO people who control it, and that's two people who don't live together but have a long term friendly relationship. This is necessary, because bad things happen to people. There needs to be a way to continue even if the unthinkable happens to the key person.

I agree, but there have been no volunteers yet.

There needs to be a way to pay for this continuation, even if it seems to be free now. I get requests for donations from WikiPedia maybe once a year. I give generously to those drives, simply because I believe it deserves my, and many other's, support.

Hey, don't get me wrong, if people want to send me cash I'll never turn it down. But there are no financial costs associated with this project.

A continuation after my death may change that, but I'm folding it in with another organization that is designed to continue past my death. Those legal arrangements are not yet complete, but they're being worked on, and hopefully that won't be an issue for a while yet. (I'm 54)

Finally, a comment on the 5005A. It's fine for something to be in two, or more, categories, but there should not be duplicate listings. If this is how things are now, it's a mistake. Redundancy can be tempting, but in cases like this, it is crippling, because it means that someone has to remember to make edits to both, or several, so you never know which is correct. [A man with two watches is never sure of the correct time.] Multiple pointers pointing to a single entry is fine, but having multiple entries quickly goes bad.

Pete set up multiple pointers to a single entry. If he hadn't, I'd have requested that he change it. (I do understand data, and so does Pete)

I have not been to the HP Wiki yet, because the TekWiki is already soaking up too much of my time, but I'm sure I'll get there eventually, and I hope I'll be able to contribute what I can, when I can.

That would be great.

This is a worthy effort, long overdue.

Thanks, and I agree. I don't recall this degree of scrutiny and negativity (not from you, but from others) being aimed at TekWiki when it started, but these are all very valid questions, especially with the ephemeral nature of so many things on the net today, and so many people who don't know what they're doing starting big projects. I believe I've set things up the correct way. I come from the startup company world; I know how to set things up to be inexpensive and resilient.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

I've been a contributor to TekWiki for awhile now. It's a beautiful resource and I'm pleased to hear that something similar is happening for HP products. I like to add my 2 cents on a couple of things.

Long term sustainability is the most important factor. In my mind, the critical part of this is that there are at least TWO people who control it, and that's two people who don't live together but have a long term friendly relationship. This is necessary, because bad things happen to people. There needs to be a way to continue even if the unthinkable happens to the key person.

There needs to be a way to pay for this continuation, even if it seems to be free now. I get requests for donations from WikiPedia maybe once a year. I give generously to those drives, simply because I believe it deserves my, and many other's, support.

Finally, a comment on the 5005A. It's fine for something to be in two, or more, categories, but there should not be duplicate listings. If this is how things are now, it's a mistake. Redundancy can be tempting, but in cases like this, it is crippling, because it means that someone has to remember to make edits to both, or several, so you never know which is correct. [A man with two watches is never sure of the correct time.] Multiple pointers pointing to a single entry is fine, but having multiple entries quickly goes bad.

I have not been to the HP Wiki yet, because the TekWiki is already soaking up too much of my time, but I'm sure I'll get there eventually, and I hope I'll be able to contribute what I can, when I can.

This is a worthy effort, long overdue.

I suspect that AT6 was supplied seperately to the unit see item 10 of accessories supplied.


Robert.

I picked up a physically damaged HP 8513A Trans/Refl test set (surprisingly in a garage sale!) to harvest some RF components
According to the service manual there must be a 8493C-10dB attenuator (designated by AT6) in the unit but I cannot find where it is
The block diagram in the manual is poorly drawn and misses all attenuators except one. Does anybody know if the 10dB pad
even exist in 8513A and if so where it is located?
I am sure I have looked everywhere. The RF parts are all visible so I am guessing the service manual is wrong

Interested in that. Let me know.?
Best regards

On Sat, Dec 9, 2023 at 08:46 AM, Dave McGuire wrote:

On 12/9/23 10:44, n4buq wrote:

I notice the 5005A is listed twice (under different categories). Is that intentional?

I don't know, I wasn't the one who added it. But it does fit into both of those categories.

-Dave

I uploaded the 5005A, a year or two ago I think. I deliberately put it in both categories - it is a multi-purpose instrument.

Pete

I've signed up, going to need to learn how to use DokuWiki, but editing to correct an error was easy enough.

David

On 12/9/23 13:17, Reginald Beardsley via groups.io wrote:

But you "question" a piece of software because of the color of the buttons?
Seriously?

I have dry macular degeneration. Contrast is a *MAJOR* issue. I am quite certain I'm not alone. Glaucoma doesn't make it any easier. Not being able to find the edit box is a daily experience. So yes, I do take it very seriously.

I'm sorry to hear it. I'm pretty sure there are accessibility tools out there for contrast enhancement, etc, in web browsers.

But "I question using" is a strange way to express "I have visual limitations which make this difficult". It's an unfortunate fact thatbut very little of the Internet is structured for accessibility for the disabled.

All I wanted to do is hire some people in Argentina who are dealing with inflation greater than Zimbabwe make some money by uploading HPAK manuals and datasheets to HPwiki.org. As I had proposed spending several thousand USD paying to have the files archived on Dave's server I had expected a bit more cooperation.

By "cooperation" you wanted to change the nature of the project in impractical and unsustainable ways. And, once again, "Dave's server" is not a file archive site. Uploading files is a small fraction of this project. There are already file archive sites, the most popular being KO4BB. Availability of files is not a problem that this community has.

Oh, well. I'll find another project for the money.

That's your prerogative.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

I forgot to mention: the 3335A is fed from a distribution amplifier and that source is rock solid (I checked.)? The unit also does the same when using it's internal reference.

Hal

My 3335A recently developed an jitter in it's output.? I first noticed it on a counter and then verified it on a 'scope.? I then looked at the output on my 53310A and saw it was primarily a variance of +- a couple KHz or less across all frequency outputs.? I'm attaching pics of the 53310A screen along with a listing of measured output - the curve shown on the screen shot is mostly the same across all frequencies.? Further there is a copy of the SA output for a 50MHz input - again, the same response across varying frequencies.? The 3335A is not the simplest or easiest animal to troubleshoot so I am asking here in the hopes that someone else has experience that might narrow down the problem area before I start.

Thanks to all!

Hal

On Sat, Dec 9, 2023 at 10:04 AM, Dave McGuire wrote:

But you "question" a piece of software because of the color of the buttons?
Seriously?

I have dry macular degeneration. Contrast is a *MAJOR* issue. I am quite certain I'm not alone. Glaucoma doesn't make it any easier. Not being able to find the edit box is a daily experience. So yes, I do take it very seriously.

All I wanted to do is hire some people in Argentina who are dealing with inflation greater than Zimbabwe make some money by uploading HPAK manuals and datasheets to HPwiki.org. As I had proposed spending several thousand USD paying to have the files archived on Dave's server I had expected a bit more cooperation.

Oh, well. I'll find another project for the money.

Reg

You're welcome Barry, and I'm glad you like it. These sorts of things are always a slow process.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

According to this compatibility matrix:

? https://www.keysight.com/us/en/assets/9018-06749/reference-guides/9018-06749.pdf

it's just the 16500C.? The 16500A and 16500B don't support the 16534A module.

-mark