Re: WANTED HP8482H Power Sensor

#114196

They are former HP people.
Hardy

-----Oprindelig meddelelse-----
Fra: [email protected] [mailto:[email protected]] P? vegne af Bruce
Sendt: 27. februar 2021 19:37
Til: [email protected]
Emne: Re: [HP-Agilent-Keysight-equipment] WANTED HP8482H Power Sensor

Parkertest is a seller on ebay, I also posted a link to their D&B stats - seem to be a real business.

I'm attaching a picture of the certificate they supply with a calibration.

Cheers!

Bruce

Quoting Roy Thistle <roy.thistle@...>:

On Sun, Feb 21, 2021 at 12:49 PM, Bruce wrote:

Parkertest will rebuild the sensor and provide a certificate of
calibration equal to new.What is a "Parkertest?" ... there are several interpretations of that
based on Google.
Does "Parkertest" refer to an Ebay entity?
I'm not saying "Parkertest" ... as referenced in Bruce's post...
can't/won't/doesn't provide a "... certificate of calibration equal to
new." But, how do we know "Parkertest" does?

--
Denne mail er kontrolleret for vira af AVG.

Re: A few questions on a newly acquired 8902A

#114195

It is not too difficult to make one of these.  And for a LOT less
money - BEAUTY isn't everything but CASH might be in the running :-)

Cheers!

Quoting Harold Foster <halfoster@...>:

Show quoted text

I agree, and the more I learn about the unit the more impressed that
I am - also, finally clued in on the reason for the 11722A, it
enables calibrated tuning of the measurement (which, in turn, allows
further refinements) whereas with using only a power sensor? I only
get broadband results with any accuracy.? It looks like I'll wind up
getting one, but they are pretty spendy so I'll wait until I can
find a good deal or actually need it.? Or, until I have an impulsive
moment - of course, one of those moments is how I got the 8902A in
the first place - watching one of Tony's excellent videos on one and
went all "I gotta have that!"
Hal

Re: WANTED HP8482H Power Sensor

#114194

Parkertest is a seller on ebay, I also posted a link to their D&B  stats - seem to be a real business.

I'm attaching a picture of the certificate they supply with a calibration.

Cheers!

Bruce

Quoting Roy Thistle <roy.thistle@...>:

Show quoted text

On Sun, Feb 21, 2021 at 12:49 PM, Bruce wrote:


Parkertest will rebuild the sensor and provide a certificate of
calibration equal to new.What is a "Parkertest?" ... there are several interpretations of  that based on Google.
Does "Parkertest" refer to an Ebay entity?
I'm not saying "Parkertest" ... as referenced in Bruce's post...  can't/won't/doesn't provide a "... certificate of calibration equal  to new." But, how do we know "Parkertest" does?

Pwr sensor report.jpg

Re: WANTED HP8482H Power Sensor

#114193

On Sun, Feb 21, 2021 at 12:49 PM, Bruce wrote:

Parkertest will rebuild the sensor and provide a certificate of calibration equal to new.

What is a "Parkertest?" ... there are several interpretations of that based on Google.
Does "Parkertest" refer to an Ebay entity?
I'm not saying "Parkertest" ... as referenced in Bruce's post... can't/won't/doesn't provide a "... certificate of calibration equal to new." But, how do we know "Parkertest" does?

Lots of fresh HP/Agilent goodies being uploaded for spring stuff season

walter shawlee

#114192

I haven't finished uploading all the HP/Agilent items yet, but you may want to have a look at what is there, and let me know if you want to see something I have left out so far. Per previous requests I have added 10MHz ovenized oscillators, custom ICs, counter parts, and so on. The is also a huge pile of Tek and other items up already. I still have some hp scope/logic analyzer stuff and more counter items to go.
HP stuff is here:?
Tek stuff is here: https://www.sphere.bc.ca/test/stuffday.html#tekfans
the main gateway is here:?
Please let me know if you are looking for some weird items, it's hard too know what is most useful to everybody.
Should I put up more microscopes or power semiconductors? What about microwave stuff?
Anybody interested in older HF receivers like R390A, etc? I have a buddy in Calgary who has some great gear to liquidate.
please don't forget to visit the FREE Stuff section at the bottom, just above all the CRTs.
all the best,
walter (walter2 -at- sphere.bc.ca)
sphere research corp.

Re: WANTED HP8482H Power Sensor

#114191

On Wed, Feb 24, 2021 at 02:33 PM, Keith Monahan wrote:

"...It ended up being approximately 40% of the original new price."

Hi All:
Well, 40% of "way way too much" is approximately "way too much".... especially...since Keysight won't release service information/schematics, and Keysight sourced parts are very expensive... if parts are even available from Keysight.
I don't work for Keysight, or for a competitor, or run a business, or sell...
But, if one does do some of the above.... then buying from Keysight might be worth it... since the "unit" somehow generates revenue.
I know for sure that some of us posting here are having a "business."?
I'm not trying to imply anything further with this claim... except... if one does do a "business"... that fact ought to be clearly stated. Sometimes (but perhaps not always?) applicable posts do.
Best regards to all.

Looking for manuals: HP 1333A XY, 1347A Display

#114190

Hi,

I've posted this before, but retrying.

Paper or Microfiche OK. Will pay to ship to Toronto Canada, can return
after scanning, or any reasonable price to purchase.

Thanks for any help,
--Toby

HP6227B or similar

Dick

#114189

开云体育

Looking for a dead HP6227B. Need not work as long as the

Meters are good.

Will consider other types , ie: similar form factor with two

working meters.

Thanks, Dick, W1KSZ

Re: A few questions on a newly acquired 8902A

#114188

I agree, and the more I learn about the unit the more impressed that I am - also, finally clued in on the reason for the 11722A, it enables calibrated tuning of the measurement (which, in turn, allows further refinements) whereas with using only a power sensor? I only get broadband results with any accuracy.? It looks like I'll wind up getting one, but they are pretty spendy so I'll wait until I can find a good deal or actually need it.? Or, until I have an impulsive moment - of course, one of those moments is how I got the 8902A in the first place - watching one of Tony's excellent videos on one and went all "I gotta have that!"??
Hal

Re: 410C probe leads

#114187

I'm looking at mine now.? It's part of the lead.? I think bandersontv on YouTube showed that the shield is grounded to the outside of the probe as well.? I'll have to make a probe since this one is missing.

Re: 410C probe leads

#114186

And, now, I'm curious.  Figure 5-13 (Range and Function Switching (Pictorial) ) shows a shielded wire for DCV, but it's unclear whether that's part of the lead wire or only the internal cabling.  The other schematics don't seem to show a shield for the DCV probe.  I suspect that's just the internal wiring but I'll have to open one (or more) of mine up now to satisfy my curiosity.

Thanks,
Barry - N4BUQ

Show quoted text

----- Original Message -----
From: "n4buq" <n4buq@...>
To: [email protected]
Sent: Saturday, February 27, 2021 8:45:45 AM
Subject: Re: [HP-Agilent-Keysight-equipment] 410C probe leads

I had one that was done that was and rather liked it.  I have a few more
410Cs and have been very tempted to do that but I've elected to keep them
stock.

As far as I know, it doesn't have a negative effect - especially since the AC
probe has a separate jack/plug so you don't need to worry about the triax
for that one.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "mill_glen_chevy via groups.io" <brstpr@...>
To: [email protected]
Sent: Friday, February 26, 2021 10:25:50 PM
Subject: [HP-Agilent-Keysight-equipment] 410C probe leads

Is there a compelling reason, besides HP did it this way so it must be
right,
not to replace the fixed test leads with banana plugs or BNC’s? ?Mine need
to be replaced and I’ll do it with plug in leads if it’s not going to cause
problems.

Thanks for the help

Re: 410C probe leads

#114185

I had one that was done that was and rather liked it.  I have a few more 410Cs and have been very tempted to do that but I've elected to keep them stock.

As far as I know, it doesn't have a negative effect - especially since the AC probe has a separate jack/plug so you don't need to worry about the triax for that one.

Thanks,
Barry - N4BUQ

Show quoted text

----- Original Message -----
From: "mill_glen_chevy via groups.io" <brstpr@...>
To: [email protected]
Sent: Friday, February 26, 2021 10:25:50 PM
Subject: [HP-Agilent-Keysight-equipment] 410C probe leads

Is there a compelling reason, besides HP did it this way so it must be right,
not to replace the fixed test leads with banana plugs or BNC’s? ?Mine need
to be replaced and I’ll do it with plug in leads if it’s not going to cause
problems.

Thanks for the help

Re: A few questions on a newly acquired 8902A

#114184

The 8902A as well as the predecessors in that line ( 8901B and 8901A)? are extremely capable pieces of test equipment and quite honestly the current replacements do not seem as good. ( at least from Keysight )

I do not consider myself an expert on anything? and still learning on these devices as well even though I use them every day.

The TUNED RF LEVEL does go down to -130dbm? which is the low limit on most of the equipment I am testing as well so yes you do end up using the full range of low power measurements.

Most SA's can barely measure down to -100 dbm and not really usable below -90dbm so to get another 40db of range for an accurate measurement? is pretty good and why they are still in demand today.

Re: 410C probe leads

#114183

Yep, I checked the manual and it shows a coax which is grounded at the instrument.? Also a 1 meg resistor in the probe end of the DC lead.? The usual issue with the AC probe is the small vacuum tube diode in the probe.??

Ed

Show quoted text

-----Original Message-----
From: mill_glen_chevy via groups.io <brstpr@...>
To: [email protected]
Sent: Sat, Feb 27, 2021 8:23 am
Subject: Re: [HP-Agilent-Keysight-equipment] 410C probe leads

I do believe the DC volts in on mine is coaxial. The shield is grounded inside the instrument. I can put a BNC on that one and make the appropriate probe. There’s not one now.?

I haven’t tackled the AC side yet, except to see it isn’t doing much. DC and ohms respond to input. I wanted to change out the dried up leads early on so they won’t cause issues while I get at the rest of it.?

Cheers to you all for the input. I’ll drop a picture when I figure it out

Re: 410C probe leads

#114182

Now I have to retract my retraction:

After my eyes cleared, I went back and took a second look
at the manual..., and this time went past the block diagram.

The schematic clearly shows that both the DC and the OHMS
leads are shielded, and grounded directly to the Common lead's
terminal.  The AC is also grounded, but through a 0.002uf cap.

Look at Figure 5-14, on page 5-15 of the manual... which is
the schematic of the wafer switches and probes.

-Chuck Harris


Chuck Harris wrote:

Show quoted text

Hi Stephen,

You are indeed right.

I was thinking about all of the Heathkits, the RCA VoltOhmists
the Heathkits were copied from, and several other VTVM's I have
used.... Except the 410B/C, and an odd Triplett or two...

I wonder why it isn't coaxial?

Sorry for the disinformation.

-Chuck Harris

Stephen Hanselman wrote:
Chuck,

The DC lead is not co-axial at least on my 410C. ?I suspect the just didn’t think
about it. The 410E still has fixed ohms and dc but a plug-in AC probe?

Regards,

?

Stephen Hanselman

Datagate Systems, LLC

On Feb 26, 2021, at 21:13, Chuck Harris <cfharris@...> wrote:

?Kind of hard to do given that the DC lead is coaxial...

-Chuck Harris

mill_glen_chevy via groups.io wrote:
Is there a compelling reason, besides HP did it this way so it must be right, not to
replace the fixed test leads with banana plugs or BNC’s? ?Mine need to be replaced
and I’ll do it with plug in leads if it’s not going to cause problems.?

Thanks for the help

Re: 410C probe leads

#114181

I do believe the DC volts in on mine is coaxial. The shield is grounded inside the instrument. I can put a BNC on that one and make the appropriate probe. There’s not one now.?

I haven’t tackled the AC side yet, except to see it isn’t doing much. DC and ohms respond to input. I wanted to change out the dried up leads early on so they won’t cause issues while I get at the rest of it.?

Cheers to you all for the input. I’ll drop a picture when I figure it out

Re: 410C probe leads

#114180

Hi Stephen,

You are indeed right.

I was thinking about all of the Heathkits, the RCA VoltOhmists
the Heathkits were copied from, and several other VTVM's I have
used.... Except the 410B/C, and an odd Triplett or two...

I wonder why it isn't coaxial?

Sorry for the disinformation.

-Chuck Harris

Stephen Hanselman wrote:

Show quoted text

Chuck,

The DC lead is not co-axial at least on my 410C. ?I suspect the just didn’t think
about it. The 410E still has fixed ohms and dc but a plug-in AC probe?

Regards,

?

Stephen Hanselman

Datagate Systems, LLC

On Feb 26, 2021, at 21:13, Chuck Harris <cfharris@...> wrote:

?Kind of hard to do given that the DC lead is coaxial...

-Chuck Harris

mill_glen_chevy via groups.io wrote:
Is there a compelling reason, besides HP did it this way so it must be right, not to
replace the fixed test leads with banana plugs or BNC’s? ?Mine need to be replaced
and I’ll do it with plug in leads if it’s not going to cause problems.?

Thanks for the help

Re: HP 85640A RF Tracking with HP 8591E

Rob VE3RWY

#114179

Thanks for the suggestion Don.? I ended up getting an 8560A SA.

I liked the project Marcus Bannerman took on a year ago modifying the internal clock frequency of of a BG7TBL to the 8591E and pulling the LO out the back.? I think I am going to try that.

Rob VE3RWY

Re: 410C probe leads

#114178

开云体育

Chuck,

The DC lead is not co-axial at least on my 410C. ?I suspect the just didn’t think about it. The 410E still has fixed ohms and dc but a plug-in AC probe?

Regards,

?

Stephen Hanselman

Datagate Systems, LLC

Show quoted text

On Feb 26, 2021, at 21:13, Chuck Harris <cfharris@...> wrote:

?Kind of hard to do given that the DC lead is coaxial...

-Chuck Harris

mill_glen_chevy via groups.io wrote:
Is there a compelling reason, besides HP did it this way so it must be right, not to
replace the fixed test leads with banana plugs or BNC’s? ?Mine need to be replaced
and I’ll do it with plug in leads if it’s not going to cause problems.?

Thanks for the help

Re: 410C probe leads

#114177

Kind of hard to do given that the DC lead is coaxial...

-Chuck Harris

mill_glen_chevy via groups.io wrote:

Show quoted text

Is there a compelling reason, besides HP did it this way so it must be right, not to
replace the fixed test leads with banana plugs or BNC’s? ?Mine need to be replaced
and I’ll do it with plug in leads if it’s not going to cause problems.?

Thanks for the help