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On 4/11/25 11:11, John Kolb wrote:

Anyone know where I can find a copy of the 8402A power meter calibrator manual?

has the manual without schematics,
and I found those somewhere, and here they are:

On 4/11/25 11:11, John Kolb wrote:

Anyone know where I can find a copy of the 8402A power meter calibrator manual?

I have an army tech bulletin on it.

TB 9-4931-393-35


TB 9-4931-393-24

Chased down reference #2 in the HP 1975-10 file

P. A. Szente, S. Adam, and R.B. Riley, "Low-Barrier..."

It's cited many places including this large publication:

An Introduction to Microwave Measurements

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Reading this thread reminded me of my 431 & 432. Anyone know where I can find a copy of the 8402A power meter calibrator manual? Not at the usual suspects.

John??? KK6IL

Hi Sergey,

Many institutions have recently decided that they need to
know the location of their customers. For those that are
ignorant about internet fraud, using Microsoft and Apple
products, out-of-the-box, suffices, as they will all blab
everything they know about you to anyone that asks during
a web connection.

Those with moderate knowledge of such things often use a
variety of nonsense blockers that abort such requests for
location as a matter of course... or spoof them, giving a
random location. Those that use VNC, are skipped around the
world until they are virtually at another location, so any
information their browsers give is someone elses.

Brave is particularly bad in this regard, as it dutifully
blocks or spoofs just about everything asked that might
identify you and your location...

So, unless you give a little, most of commerce will ignore
you, and you will be as lonely as the lighthouse keeper on
the edge of the universe...

I find I have to allow brave to give my location, for certain
transactions, or they fail to work for me.

-Chuck Harris


On Wed, 9 Apr 2025 14:45:20 -0700 (PDT) "Sergey Kubushyn"
<ksi@...> wrote:

On Wed, 9 Apr 2025, Sergey Kubushyn wrote:

BTW, it also depends on where you are as everything is going via some
proxy (CDN) like Akamai/Imperva/Cloudfare/whatever these days and
those are falling apart.

There was couple of weeks when I was not even able to login into my
Cox Business account to pay my bill -- it's been telling me I'm
trying to login from abroad (they used/use Imperva and that routed me
via Israel) and they don't allow that.

On Wed, 9 Apr 2025, Lynn C via groups.io wrote:

You were lucky to catch that very rare moment it worked. I don't
need those connectors much -- have a bunch of dead sensors that I
can use to build my own calibrator and those already have the
entire driving circuitry in them so I don't have to build it from
scratch. Just tried to get some to have them in stock, just in
case. I actually don't see any other use for them except building a
calibrator so not a big loss...

I just purchased 12 pcs without difficulty using a credit card for
payment.

Lynn C. KA7FPH

On Wed, Apr 9, 2025 at 3:03?PM Sergey Kubushyn via groups.io
<ksi= [email protected]> wrote:

On Wed, 9 Apr 2025, David Feldman via groups.io wrote:

They were $4.12 when I added 10 to my cart. Then, when tried to
checkout they suddenly became $9.15 and "We can't process Credit
Crd payments at this
time. Please try again later".

Newark became a buggy horror, I was not been able to purchase
ANYTHING from
them for last 2 years or so -- there was ALWAYS an issue and
their site never worked since something like couple of years ago.

Do NOT buy anything from them, don't support the incompetence.

This is about the Amphenol Tuchel female connector discussed in
this

thread's history (used by HP for panel and device mounting the
8480 series
power sensors and 43x series power meters.)

This posting (9 April 2025) probably has limited utility and
will at

some point become moot, but wanted pass this along in case
anyone was interested in homebrewing HP power sensor or power
meter, as the ebay listing (offering the same connector) cited
previously in the thread disappeared some time ago.

I located stock (in US distributor Newark) a version of the
female panel

connector cited in the discussion thread. They appear to be a
"close out" (from time to time, Newark reprices an item in what
appears to be an end-of-stock circumstance (the notation includes
"available in quantity shown".)

This connector is female, panel mount, with solder cup pins (12
pins.)

There are other variants of the same connector type (solder
pins, etc.)

The part appears to show stock of 82 pieces (in US) at price of
USD 4.12

today 9 April 2025.

Amphenol-Sine has online a data catalog which includes
mechanical

drawings for this specific connector:

See page 22 for PCB layout applicable to the 12 pin thru-hole
version

(PNG captured from that page is attached).

I rotated the (above) drawing of the 12 pin connector by 37.5
degrees

counter-clockwise - using powerpoint - to bring the key down to
the bottom
of the connector, matching how it is used in the HP devices -
and scaled it
(pins E and K are separated by 9.0 mm) so that I could use the
circles representing the 12 pins as a position guide for
corresponding holes in a PC board layout (idea is a small PCB
that adapts the connector's rear pins
to a 2x4 2.54mm header for mating to a prototyping board.)
Somewhat brute-force but this was a last-minute add to a PCB
layout that was headed
out for fab.

I ordered and received a couple of these connectors and they
appear to

mate with the typical HP sensor cable without difficulty. The
panel mounting nut (ring) - included - would require a 2-pin hand
tool to tighten.

I have a similar question as most-recent posting to this thread
asked -

about whether this project got built and what the experience
was!

Dave

---
*
* KSI@home KOI8 Net < > The impossible we do immediately. *
* Las Vegas NV, USA < > Miracles require 24-hour notice. *
*

The files are in a folder called

A homemade diode power sensor for HP meters 92636

Files (8) are uploaded. They used the names given by the original link.

David Feldman <wb0gaz@...> added folder /All HP, Agilent and Keysight instruments in folders by part numbers/8000 to 8999/8481A, 8482A and 8483A Power Sensors/A homemade diode power sensor for HP meters 92636

Description:
Files referenced in thread that started Feb 1 2019. Retrieved using Internet Archive Wayback machine.

Aside from HP and Mini Circuits there are numerous other documents available from other sources talking about his subject.

I used to attend seminars at NBS (now NIST) when living in Boulder, Colorado Some of them touched on connector characteristics and care. I was surprised to learn about the limited number of mate/unmate cycles on some connectors before they degraded the signals passing through them.

Greg

Solder-tail version of the same connector, also from Newark, also at unusual unit price.



Roy - if this is contrary to group guidelines, please accept my apology (I presumed that this would be of interest due to the very specialized nature of the parts and the prior reference to an ebay seller being defunct.)

Below is a listing of the file names I retrieved using internet archive during my brief review of the thread this morning (anyone could do this, but of course it will be convenient to have them cached online).

I've not uploaded them anywhere at this point - they can be retrieved using internet archive to search on each of the (defunct) URLs that were in the postings from earlier times.

If someone can tell me where these files should be uploaded, I'll be happy to do that.

(DOS command of the directory where I put the files retrieved)

Directory of D:\848x homebrew power sensor

04/10/2025 05:22 PM <DIR> .
04/10/2025 05:22 PM <DIR> ..
04/10/2025 10:54 AM 2,658,520 08484-90019-PowerSensor.pdf
04/10/2025 11:01 AM 5,261,326 1975-10.pdf
04/10/2025 10:51 AM 4,021,004 20181117_170657.jpg
04/10/2025 10:50 AM 3,350,675 20181117_173101.jpg
04/10/2025 10:52 AM 234,284 8481schem.png
04/10/2025 10:55 AM 11,393,180 8484a.pdf
04/10/2025 10:56 AM 211,615 HP 11683A H01 ops_service.pdf
04/10/2025 11:03 AM 6,653,962 WTG_RefGuide_F1128_sm_web.pdf

I went back to the start of the thread to capture local copies of the various cited references. Most of the links are dead, however, internet archive wayback machine got me to almost all of them, so I have the files cached here now (mostly commercial reference material from HP and Boonton, along with Tobias' hand drawn schematics (I don't believe Tobias published schematics after his first few drafts, and don't know if he maintains a repository anywhere.)