开云体育

Dave McGuire
Do you still have these ?? Could? you test one in the 3852A?

Maciej

Does anyone know what size and where I could get "O" rings for my HP 8714 VNA.Attenuator??
One is not there and attenuator is not working properly.

wally KC9INK

Howdy folks,

? ?I am selling the subject line parts, and I understand this group is not primarily for selling stuff, but it *IS* for?
repairing equipment.? ?Since I am willing to part out the sweeper, I figured I would quickly post a link to it here
in case anyone is looking for parts.? ?There are more details and pictures in my original post here:



? To keep down the clutter, I'll take any responses THERE, not in this group.? ?Thanks!

?Dan

He was talking to me.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

开云体育

Which Dave?

Hi all, i appreciate this isnt a HPAK instrument but being Boonton it kinda is :)

Has anyone got a full service manual for these please. Ive managed to find one online but it doesnt have a circuit diagram.

I also have a pdf of Boontons no35 notebook? by G.Raymond. Polen who designed the instrument, but id really like the full manual if possible and it will save me trying to draw out the circuit by hand.

?

And definatly off brand topic, has anyone any details/specs on a Marconi TM9701 VHF/UHF Detector, test accessory. Its an accessory with both a positive and negative output via seperate diodes. Id like to test it but manufacturers specs would be handy.

Many thanks in advance Pete Harrison.

looks exactly like the HP 98257A . Thank you all.

Hi Don,

Your statement that Motorola handled I/O well, but Intel
didn't, puzzles me.

Would you care to elaborate?

-Chuck Harris


On Fri, 3 May 2024 19:26:48 +0000 (UTC) "Don Bitters via groups.io"
<donbitters@...> wrote:

Way back when instrument control was the "Thing" in the
instrumentation world. The HP controllers were focused on I/O control
(Motorola based, PA RISC, etc.) (9825A, 9830A, 9845A, series
9000/200, 300, 500, 700, C110, C180, C270). PC based (Intel, etc.)
generally did not handle I/O well, at least for instrument control.
HP Basic was a great tool and generally established the market for
instrumentation control, especially when they gave it to the
marketplace.It evolved and then HP was splitting itself into Agilent
(instruments) and become a computer company (ies) and HP ported HP
Basic to HP-UX, then a little later dropped support for HP Basic.?HT
Basic created/ported HP Basic to the Intel platform and the rest is
history.Don Bitters

Yahoo Mail: Search, Organize, Conquer

On Fri, May 3, 2024 at 03:30 PM, Dave McGuire wrote:

David Kuder

Two Daves? - got confused. Either way I am grateful.? Holes added to fit 3852A

On 5/3/24 15:22, Maciej Kawalkowski, Liberty Electronics Design and Service LLC wrote:

I managed to find your SMD version.
Only one issue is the hole locations -? other than that I think i will try your design on the 3852A. Will try up to 8 chips. I dont thin you can use more than 4MB in the 3852A

To be clear, I did not design that board; I fixed a few issues, readied it for production, and made a few boards. The original design was done by David Kuder.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

Way back when instrument control was the "Thing" in the instrumentation world. The HP controllers were focused on I/O control (Motorola based, PA RISC, etc.) (9825A, 9830A, 9845A, series 9000/200, 300, 500, 700, C110, C180, C270). PC based (Intel, etc.) generally did not handle I/O well, at least for instrument control.?

Dave

I managed to find your SMD version.



Only one issue is the hole locations -? other than that I think i will try your design on the 3852A. Will try up to 8 chips. I dont thin you can use more than 4MB in the 3852A
Maciej

On 5/3/24 13:11, Maciej Kawalkowski, Liberty Electronics Design and Service LLC wrote:

The Hp 9000 DIO board has the same pin out where it matters and looks like the same board type.

Yes, it does look to be the same thing.

I too have a 3852A by the way. It has never given me trouble, so I've never needed to open it up.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

On 5/3/24 12:59, Maciej Kawalkowski, Liberty Electronics Design and Service LLC wrote:

HP-9000 DIO RAM
Your post helped a lot . I think I found the cloned memory info by Dr. Scott M. Baker :
<>

That's not the project I worked on; the one I was involved in is just pure RAM, 7.5MB to fill the address space. No ROM. There was no discrete logic; everything was implemented in a GAL, and it was all surface-mount.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

On Fri, May 3, 2024 at 05:38 AM, Scott Townley wrote:

Ozan,
Thank you for the tips.? My observations:
1. I was able to verify +15VF, +5A and +10UF voltages directly on A7.? I need to get an extender to really dig into it :-(
2. In the system diagnostics, +10V Reference (presumably +10UF?) is quite unstable
3. In verifying +10UF, I measured at one end of R105, which connects +10UF to V(REF)+ of the DAC in the third converter ref_cal circuit.? Not knowing which end was which, it was easy enough to find the +10UF (and checking with an o-scope it's quite stable, unlike the system diagnostic), but as it happens the other side of R105 has a very small voltage on it (less than 100 mV).? This doesn't seem right to me.??
As I await my extender, any further insights would be appreciated!

===
Hi Scott,
Other end of R105 goes to a virtual ground inside the IC , seeing ~0V is expected. Current through R105 becomes the reference current for the DAC.

+10V test voltage should go through muxes mentioned in the previous message and show up as 1V at top of R18 (ANA_TEST). If you see 1V then this board is fine, the issue is either connectivity between this board and the CPU board or the MUX on the CPU board is damaged.?

Instead of extenders I usually solder kynar wires to critical test points and take out for measurement. At the measurement end I put different number of knots to distinguish which wire is which. A battery powered soldering iron works well for these small soldering jobs.?
Ozan

Hi,

I was also looking into these boards to add the 3rd channel and I found
out that all boards on eBay that have more than 3GHz you need to set the
SCALE to 4 otherwise it will not count correctly.

Below are the links for 12GHz and even 18GHz version:

18GHz Model:


12GHz Model:


Regards,
Razvan

Tony:

The 53131A had three options for the channel 3 input, 3GHz, 5GHz, and 12GHz.

I have never seen anything on EBAY over 3GHz installed in a unit.

I have seen Chinese Channel 3 boards for 3GHz (a lot of them) and 6GHz (just 1) currently listed.
I do not see the 12GHz board listed at this time, although it was listed in the past.

I did a board a few years back using the HMC432 (divide by 2) and two HMC434 (divide by 8) that could get to 6GHz or higher.

A less expensive version would use the HMC432 driving an MC12079 programmed to divide by 64, have the layout for it but never made it.

Never did any follow up on these because the Chinese clone boards were so inexpensive it was not worth pursuing.

ed

Dave
The Hp 9000 DIO board has the same pin out where it matters and looks like the same board type.