Yeah, what Paul said. I have a 70k series I pieced together, works great although it's heavy and bulky. I have the HP 70206A and the HP 70001 populated with the HP 70904A RF section, HP 70903A, 70902A IF sections, HP70900A local oscillator and the HP 70310A Precision reference oscillator. Most modules can be had for under $100 but some can still run for several hundred dollars like the HP 70900.??

Greetings all, I recently picked up a HP 43113B pulsed event timer. However I cannot seem to find any information on the web outside of images for this unit, or can I find it in any of the late 70's HP catalogs I have. I would love to get some basic operation/service manual information on this unit. My guess is that this was some sort of custom made instrument for the military or telecommunications industry. Thanks in advance.?

Nice. I’ve joined.

DaveD

Generally I do not cross post, but it seems to me appropriate in this case. These are the lists where the people I admire hang out.

Some time ago I created the group, but only informed a single person that I had done so.? However, enough people found it and joined that I decided I should take it live.

This is intended to be a forum primarily for discussing QEX articles as that should save authors from repeating the same answers to multiple correspondents.?

However, I should also like it to serve as a forum for serious work on a variety of topics from modulation systems similar to FT8 to teaching how to design an HF amplifier or oscillator from scratch as opposed to simply copying older designs.? Experts conversing with experts and also taking the time to instruct novices. I am hoping for a substantial educational content.

The group is unmoderated.? Unless someone gets seriously outside the bounds of polite social behavior I have no intent of exercising any control unless compelled to do so.

It is also my hope that in conjunction with QEX becoming a print option for ARRL members it will help stimulate readership and advertising revenue to support QEX. I have requested that option and my ARRL membership hangs in the balance. I will continue to subscribe to QEX in print independent of whether I continue as an ARRL member.

It is my hope that this will help QEX develop the technical stature that QST once enjoyed. I have no interest in contests and trophies. I'd like to believe I am not alone in my passion for the technology of radio.

Have Fun!
Reg

On Sun, Oct 18, 2020 at 03:58 AM, Marco Marchesi wrote:

Hi Leo and Group,?
could I revamp this old post?

My HP 5216A has one of its nixie driver HP PN 1820-0092 broken.
I read almost everywhere that there is no commercial equivalent for this component.

So two questions:
- does anyone have this part to sell?
- could someone re-share the drawing of the above-mentioned adapter made up with 7404 and 74141? Link are broken (maybe expired)?

Thank you in advance??

Marco
?

Curiosity got the better of me this afternoon, so I started looking in earnest for a solution ?I found a web page that had a file that someone had created that describes the pinout and functions of the 1820-0092 chip. ?I started Diptrace and drew a schematic of what I THINK is the correct way to do it. ?I had to create a 74171 component in Diptrace, and decided to use a 7400 quad NAND instead of the 7404. ?
Both files are attached. ?Try my solution at your own risk, but as a best guess, it should work. ?

Good luck,
Dave M

Siggi, Dave,?
Thank you so much!

Ciao

Looking for the special glass piece that goes in frt of CRT on the 85662A display section ( other models use same) , anyone got one for sale?

thank you

Dan

On 2020-10-18 10:27 a.m., bsdphk wrote:

As far as I know, 1349A is a 1345A with a bigger CRT, so you should be
able to use the 1345A docs, but distrust things like anode voltages etc.

Is there any commonality with 1347A? I'm looking for service manual for
one of those.

--Toby

On Sun, Oct 18, 2020 at 10:39 AM, David M wrote:

On Sun, Oct 18, 2020 at 03:58 AM, Marco Marchesi wrote:

Hi Leo and Group,?
could I revamp this old post?
My HP 5216A has one of its nixie driver HP PN 1820-0092 broken.
I read almost everywhere that there is no commercial equivalent for this component.

So two questions:
- does anyone have this part to sell?
- could someone re-share the drawing of the above-mentioned adapter made up with 7404 and 74141? Link are broken (maybe expired)?
Thank you in advance??
Marco
?

Marco,
Here are links to some online vendors that claim to have the?1820-0092 in stock. ?I can't vouch for any of them, so you're on your own for any dealings with them.
The links are:
https://www.rgranderp.com/index.php?main_page=product_info&products_id=279485
https://www.hongkoogl.com/index.php?main_page=product_info&products_id=263385
https://www.etdmaks.com/index.php?main_page=product_info&products_id=318829

Here's a link to a post describing a kludge workaround for the chip that involves piggy-backing a 7404 onto a 74141 to make his counter work. ?

Good luck in your repair.

Dave M

Oops!! ?Forgot the link to the post. ?It's at?


Good luck,
Dave M

On Sun, Oct 18, 2020 at 03:58 AM, Marco Marchesi wrote:

Hi Leo and Group,?
could I revamp this old post?
My HP 5216A has one of its nixie driver HP PN 1820-0092 broken.
I read almost everywhere that there is no commercial equivalent for this component.

So two questions:
- does anyone have this part to sell?
- could someone re-share the drawing of the above-mentioned adapter made up with 7404 and 74141? Link are broken (maybe expired)?
Thank you in advance??
Marco
?

Marco,
Here are links to some online vendors that claim to have the?1820-0092 in stock. ?I can't vouch for any of them, so you're on your own for any dealings with them.
The links are:
https://www.rgranderp.com/index.php?main_page=product_info&products_id=279485
https://www.hongkoogl.com/index.php?main_page=product_info&products_id=263385
https://www.etdmaks.com/index.php?main_page=product_info&products_id=318829

Here's a link to a post describing a kludge workaround for the chip that involves piggy-backing a 7404 onto a 74141 to make his counter work. ?

Good luck in your repair.

Dave M

开云体育

Hi?

Here is what I've tried so far:

The original 44-pin drive that has a mSATA board inside and uses the 3.5" to 2.5" adapter to connect inside the scope to IDE cable

A brand new SSD drive through a 2.5" to 3.5" IDE with a separate Molex power adapter powered by a hard drive USB power supply. This drive has the original drive image the previous owner used to create the mSATA drive (I was able to contact him and he still had the image but not the drive)

A junk 3.5" IDE drive with the image obtained from the previous owner as listed above.

In all three cases, using three different drives, and two different images, the scope gives the same error. I tried the SSD in a junk laptop and it booted to a DOS screen that read something about insufficient memory and then showed a Agilent type large print logo that read: it's safe to shut down now.

I'm uncertain about that error but assume it's because the scope software was trying to boot in a laptop, however, it shows the drive is capable of loading (at I believe this to be the case).

I looked for everything in BIOS related to booting from the network and can't find a single thing. I even used the 'default 1' setting and that didn't help.

This is crazy because all I did was remove the cover, looked at the cheap hard drive adapter, re-seated the cover, discovered the ribbon cable for video slipped out (I wasn't getting any video), re-seated the cable, and then the system failed to boot.

I never went into BIOS prior to this issue, and, should I get this scope to load, still have the 50ohm and self diagnosis issue to deal with - the initial message that began this thread.

As far as I know, 1349A is a 1345A with a bigger CRT, so you should be able to use the 1345A docs, but distrust things like anode voltages etc.

Hi,
I was revamping this old post
/g/HP-Agilent-Keysight-equipment/message/58574?p=,,,20,0,0,0::Created,,1820-0092,20,2,0,24810866
where an adapter is mentioned to substitute the 1820-0092.

In my HP 5216A the central nixie is always dark.
I think the guilt is its driver because there is no activity at all on its outputs whilst there is activity on its inputs.
Do you think I'm wrong to suspect of this driver?

Thank you
??

开云体育

Hello Matthias,

take it from a fellow expat: Mouser.com. And, if needs be, have PCBway shoot you some custom adapter PCBs.

My former lab gypsy and I did this at our militia employer, where we had to maintain ancient TMI. Whenever a cap failed, we designed a replacement PCB and used modern technology, sometimes even SMT. We, in fact, found that modern capacitors, in some cases, were so "good" that the circuits no longer worked as their designers had calculated with a loss inside the capacitor.

Either way, we did also try to restuff ancient caps. But this turned out to be an expensive and slow operation....with questionable results. With a restuffed cap, you can no longer see from the outside if Mr. Capacitor has gone on summer vacation.

Tam

With best regards
Tam HANNA 

Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at  

开云体育

Hi group,

I have a defective HP214A pulser. There a tubes inside.
I do not know if all of those are still ok.

Seems to be that at least some of the electrolytics are bad.
There are some high cans inside. Diameter 35mm.

The servicemanual talks of:

• 3 times 120uF + 40uF 450V
• 1 time 40uF 450V
• 1 time 600uF 200V
• 1 time 8uF 350V
• 1 time 430uF 250V
• 1 time 20uF 50V (should be easy to get)

Where could I ask for those?

Thank you in advance?
Matthias