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A homemade diode power sensor for HP meters


 

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. *
*


 

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. *
*


 

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

They used to be OK until some time in the past when they got totally broken
and never recovered ever since.

They are not alone though -- e.g. Keysight (I have numerous calibration
agreements with them) was also broken several years ago and never fixed ever
since. Same with Tektronix.

Hi Sergey,

I too have had system problems with Newark online ordering in the past - they are not my favorite, but sometimes low-cost items appear that I can use (and these prices appear in octopart.com search engine, so that is how I found this item). Also, sometimes when I have ordered a low-cost item and went back to order more a few days later, the price had increased.

Before giving up, maybe try other browser on your computer? I tried with other browser and was able to reach "check out as guest" without unexpected price change.

Good luck!

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


 

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 <ksi=[email protected]> wrote:
On Wed, 9 Apr 2025, David Feldman via 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.? ?*
*






 

Hi Sergey,

I too have had system problems with Newark online ordering in the past - they are not my favorite, but sometimes low-cost items appear that I can use (and these prices appear in octopart.com search engine, so that is how I found this item). Also, sometimes when I have ordered a low-cost item and went back to order more a few days later, the price had increased.

Before giving up, maybe try other browser on your computer? I tried with other browser and was able to reach "check out as guest" without unexpected price change.

Good luck!

Dave


 

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. *
*


 

I can't speak to having built the project, but... I just took the precaution of ordering a dozen of these connectors for my stash. Considering how widely they were used in HP gear, and how heavily discounted they are (AND their likely disappearance from this plane of existence), I figure I should keep some around.

??? That still leaves Newark with 70 pieces. Get 'em while you can!

On 09-Apr-25 13:15, David Feldman via groups.io wrote:
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



--
Bruce Lane, ARS KC7GR,
kyrrin@...
"Quando Omni Flunkus Moritati" (Red Green)


 

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


 

Hi Jeff:
Isn't this a years old thread?
Did this home brew power sensor project go anywhere, in the mean time?


 

auto zero function explained on page 15 of the 8481A service manual.


 

I may have missed it. But what diode was used and then how was it mounted please.
If this was covered very sorry for repeating the question.
Regards
Paul


Lothar baier
 

开云体育

You can get the connectors from binder which is preferred if you are in Europe ( RS Components , buerklin, farnell )? or you can buy them from amphenol !

A few words of wisdom though based on experience :

First of use connectors that are gold plated if you use other plating options you can end up with issues at low power levels ( noise ? thermal voltages ???? ) the second thing is that you have to follow the original stackup of the cable , the agilent cable uses 12 wires but 2 wires are shielded separately and you have to keep it that way to avoid problems !

Back when I build up cables what I did is to order a 100ft 11730 cable from agilent which cost me about $1200 , I cut the cable in 3ft sections ordered C091 Amphenol connectors and then used them to build the cables !

?

https://www.mouser.com/datasheet/2/18/C09131C0122002-1285663.pdf

?

?

From: [email protected] <[email protected]> On Behalf Of Paul Bicknell via groups.io
Sent: Thursday, May 19, 2022 3:10 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

?

The connecters are available, Binder make 3 types and they did cost ?10 , ? 13 ?and ?16? each

?

Regarding Diode sensors do not forget the 430 meter was made for Diode sensors? also I believe the early 431 A had a switch position for Diode

?

Personally looking for a modern meter ( not expensive ) for wave guide diode detectors but calibrated in dB

Paul

?

From: [email protected] [mailto:[email protected]] On Behalf Of Alexandre Souza
Sent: 19 May 2022 20:49
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

?

Talking about power sensor, I got lucky enough to get a (working) 436b and a WORKING \o/ sensor. But unfortunately, got it without the cable. Is there a cheaper source for the cable than ebay?

?

73 de PU2SEX Alexandre

?

---8<---Corte aqui---8<---

---8<---Corte aqui---8<---

?

?

Em qui., 19 de mai. de 2022 às 13:41, visitslovenija <musto102@...> escreveu:

An interesting and long running thread.

Like many, I have a bit of a soft spot for the old HP435 meters and would like to have one working on the bench.

Since broken detectors do show up now and again at a decent price, has anyone successfully reworked one with busted thermocouples and modified for a diode front end? I know it’s small and very fiddly, but is that not easier than trying to build one from scratch?


Lothar baier
 

The 8484A used a single diode and had no temperature compensation , I think that HP tried to minimize the impact of temperature variations by using a heavier all metal case .... the 8481D uses a thermistor

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Paul Bicknell via groups.io
Sent: Thursday, May 19, 2022 4:22 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

OK Dave

Re the 8484 I actually have 2 of the black 2 grey and one D version a lot better than my original 430 power meter and Sensor with an N connecter on it So just a thought how dues the 8484A do its temperature compensation as I do not think I have ever looked at the CCT diagram for the 8484 A

Paul

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Lothar baier
Sent: 19 May 2022 22:08
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

The 8484A was the first diode sensor that HP produced , it was a horrible piece of equipment prone to drift especially if you got one with the black case .
Eventually HP redesigned the sensor to solve the issues and the new sensor was the 8481D
On May 19, 2022, at 15:37, Paul Bicknell via groups.io <admin@...> wrote:

?Thank you Dave for those kind words of love Paul

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dave
McGuire
Sent: 19 May 2022 21:26
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power
sensor for HP meters

On 5/19/22 16:19, Paul Bicknell wrote:
Do not worry about Typos as I must be the worst speller on this sight
Of that there can be NO doubt. But we all love you anyway. ;)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA











 

Paul
Was in no way trying to solve everyones needs.
It was just a terrible thing to waste the nice analog devices detector and the poor old HP435 on the shelf.?
With the arduino in there I also get a usb 232 output the prints information. That was just because I could. It wasn't expensive but did require soldering various disassembly and such.
Your diode approach sounds like a better answer to get the hp meter closer to teh?original design.
Regards
Paul.


 

OK Dave

Re the 8484 I actually have 2 of the black 2 grey and one D version a lot better than my original 430 power meter and Sensor with an N connecter on it
So just a thought how dues the 8484A do its temperature compensation as I do not think I have ever looked at the CCT diagram for the 8484 A

Paul

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Lothar baier
Sent: 19 May 2022 22:08
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

The 8484A was the first diode sensor that HP produced , it was a horrible piece of equipment prone to drift especially if you got one with the black case .
Eventually HP redesigned the sensor to solve the issues and the new sensor was the 8481D
On May 19, 2022, at 15:37, Paul Bicknell via groups.io <admin@...> wrote:

?Thank you Dave for those kind words of love Paul

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dave
McGuire
Sent: 19 May 2022 21:26
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power
sensor for HP meters

On 5/19/22 16:19, Paul Bicknell wrote:
Do not worry about Typos as I must be the worst speller on this sight
Of that there can be NO doubt. But we all love you anyway. ;)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA











Lothar baier
 

The 8484A was the first diode sensor that HP produced , it was a horrible piece of equipment prone to drift especially if you got one with the black case .
Eventually HP redesigned the sensor to solve the issues and the new sensor was the 8481D

On May 19, 2022, at 15:37, Paul Bicknell via groups.io <admin@...> wrote:

?Thank you Dave for those kind words of love
Paul

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dave McGuire
Sent: 19 May 2022 21:26
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

On 5/19/22 16:19, Paul Bicknell wrote:
Do not worry about Typos as I must be the worst speller on this sight
Of that there can be NO doubt. But we all love you anyway. ;)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA











 

Thank you Dave for those kind words of love
Paul

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dave McGuire
Sent: 19 May 2022 21:26
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

On 5/19/22 16:19, Paul Bicknell wrote:
Do not worry about Typos as I must be the worst speller on this sight
Of that there can be NO doubt. But we all love you anyway. ;)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA


 

On 5/19/22 16:19, Paul Bicknell wrote:
Do not worry about Typos as I must be the worst speller on this sight
Of that there can be NO doubt. But we all love you anyway. ;)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA


 

Hi Bruce
Thank you for confirming the 8484A is a Diode front end and On re reading your previews mail again it is as clear as MUD

Do not worry about Typos as I must be the worst speller on this sight
Paul

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Bruce
Sent: 19 May 2022 21:12
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

It is a type - I meant Diode

The 8484 is a DIODE sensor - many other HP diode ensors have a D in the model number as explained B4

Cheers!
Beruce

Quoting Paul Bicknell <admin@...>:

OK Bruce please explain !

You say (The 8484 is a dione power sensor. Many other HP diode
sensors end with t "D" instead of an "A" in the model number.)

I do not understand ?? also is dione in the above line a typo

So Is the 8484A power sensor is a diode front end ??
Paul

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Bruce
Sent: 19 May 2022 20:45
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power
sensor for HP meters

The 8484 is a dione power sensor. Many other HP diode sensors end
with t "D" instead of an "A" in the model number.

E.g. 8485D as opposed to 8485A

Cheers!

Bruce

Quoting Paul Bicknell <admin@...
<mailto:admin@...> >:

From memory the 8484 power sensor is a diode front end



But a working 8481 or 8484 go for about ?120 to ?160 in the UK
equivalent to a day’s wages

And it would take best part of a day to modify busted thermocouples
for a diode by the time you did any calibration

Regards Paul



From: [email protected]
<mailto:[email protected]>
[mailto:[email protected]] On Behalf Of
visitslovenija
Sent: 19 May 2022 11:20
To: [email protected]
<mailto:[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power
sensor for HP meters



An interesting and long running thread.

Like many, I have a bit of a soft spot for the old HP435 meters and
would like to have one working on the bench.

Since broken detectors do show up now and again at a decent price,
has anyone successfully reworked one with busted thermocouples and
modified for a diode front end? I know it’s small and very fiddly,
but is that not easier than trying to build one from scratch?















 

It is a type - I meant Diode

The 8484 is a DIODE sensor - many other HP diode ensors have a D in the model number as explained B4

Cheers!
Beruce

Quoting Paul Bicknell <admin@...>:

OK Bruce please explain !

You say (The 8484 is a dione power sensor. Many other HP diode sensors end with t "D" instead of an "A" in the model number.)

I do not understand ?? also is dione in the above line a typo

So Is the 8484A power sensor is a diode front end ??
Paul

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Bruce
Sent: 19 May 2022 20:45
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters

The 8484 is a dione power sensor. Many other HP diode sensors end with t "D" instead of an "A" in the model number.

E.g. 8485D as opposed to 8485A

Cheers!

Bruce

Quoting Paul Bicknell <admin@... <mailto:admin@...> >:

From memory the 8484 power sensor is a diode front end



But a working 8481 or 8484 go for about ?120 to ?160 in the UK
equivalent to a day’s wages

And it would take best part of a day to modify busted thermocouples
for a diode by the time you did any calibration

Regards Paul



From: [email protected] <mailto:[email protected]>
[mailto:[email protected]] On Behalf Of
visitslovenija
Sent: 19 May 2022 11:20
To: [email protected] <mailto:[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] A homemade diode power
sensor for HP meters



An interesting and long running thread.

Like many, I have a bit of a soft spot for the old HP435 meters and
would like to have one working on the bench.

Since broken detectors do show up now and again at a decent price, has
anyone successfully reworked one with busted thermocouples and
modified for a diode front end? I know it’s small and very fiddly, but
is that not easier than trying to build one from scratch?