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Re: HP 8970B calibration / account for loss during calibration

 

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Are you measuring 50 or 75 ohm devices??

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If 50 ohm devices, then the pad has to go on the output of the noise source, which affects the ENR of the source¡¯s input to the DUT, and needs to be accounted for in the ENR table. If you are using a nominal 5 dB source, that gets the ENR down close to zero, which, for high gain, low noise devices, is actually a good thing so long as it doesn¡¯t go negative. With a 15 dB ENR source, no problem but the table still needs to be corrected for the pad.

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If you are measuring 75 ohm devices, then the pad will go on the input to the NF meter, and the cal will take care of it.

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SF34 is there, as you said, to correct for things that were not present during the cal process. This is always an approximation so best avoided if you can as it increases the measurement uncertainty, which is going to be around .2 dB at best.

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From: [email protected] <[email protected]> On Behalf Of Marc73
Sent: Thursday, February 17, 2022 2:37 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP 8970B calibration / account for loss during calibration #141-66513

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Is it possible to account for a loss between HP8970B and the noise source during calibration? I.e. to have the same loss during calibration and during the measurement.

The HP 8970B manual says, that special function 34 (loss compensation) assumes that the loss wasn't present during calibration.

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Background: I have 75Ohm noise sources and I would like to use them in combination with the HP8970B. As this instrument has 50Ohm system impedance a permanent 75<->50 Ohm matching pad (5,72 dB loss) has to be used to transfer the system impedance. However this has to be accounted for during the calibration and measurement.
Re: HP 182T display/8559A SA - display only visible with beam find.

 

yes


On Thu, 17 Feb 2022 at 14:55, Francesco <realfran@...> wrote:
Hello Tony, when pushing the button "DISPLAY" get a vertical beam?

HP 8970B calibration / account for loss during calibration

 

Is it possible to account for a loss between HP8970B and the noise source during calibration? I.e. to have the same loss during calibration and during the measurement.
The HP 8970B manual says, that special function 34 (loss compensation) assumes that the loss wasn't present during calibration.
?
Background: I have 75Ohm noise sources and I would like to use them in combination with the HP8970B. As this instrument has 50Ohm system impedance a permanent 75<->50 Ohm matching pad (5,72 dB loss) has to be used to transfer the system impedance. However this has to be accounted for during the calibration and measurement.
Re: FS HP/AGILENT 70205A MMS display

 

I¡¯m interested. Did you have a price in mind?
Mike

On Thu, Feb 17, 2022 at 4:14 AM jfphp via <jfphp=[email protected]> wrote:
For sale small display for the 70K MMS system. Tested OK but the front faceplate and RFI gasket are missing : front plate of the CRT is directly exposed (like the old 180X oscilloscopes), very bright display but don't use a hammer to adjust the tube... PM please.

Re: Selling experience, sorry OT again

 

Dr Dave,
Just put a long Dispatch Time in when you list an item. I use 5 Days. (next option is 10) That is the time you hve from the buyer paying and you shipping before it affects your seller ratings. I find 5 days is enough for payment to be cleared into my bank account.

Robert G8RPI
Agilent 86100B recovery operating system software

 

For sale genuine? recovery operating system software ( envelope, CD, licence and recovery instructions --86100-00036-- ) for Infinium DCA 86100B. MP please.
Re: HP 182T display/8559A SA - display only visible with beam find.

 

Hello Tony, when pushing the button "DISPLAY" get a vertical beam?
Re: HP 182T display/8559A SA - display only visible with beam find.

 

FWIW, I've repaired a good number of 182C and 182T in a distant past
and often there was a carbon composition resistor (100 ohms) going
open in the cathode drive circuit.
Frank

On Thu, Feb 17, 2022 at 3:07 PM paulswed <paulswedb@...> wrote:

Well at least the problem is big and bold.
When just beam fid works it will be any of the following.
Blanking Z is cutoff for some reason.
X or Y or both are totally unbalanced. Typically some sort of supply failure if you find the delection all the way to one side.
But if just x or y then most likely a transistor in that deflection circuit.
Generally reasonable to find.
Good luck
Paul
WB8TSL
Re: HP 182T display/8559A SA - display only visible with beam find.

 

Well at least the problem is big and bold.
When just beam fid works it will be any of the following.
Blanking Z is cutoff for some reason.
X or Y or both are totally unbalanced. Typically some sort of supply failure if you find the delection all the way to one side.
But if just x or y then most likely a transistor in that deflection circuit.
Generally reasonable to find.
Good luck
Paul
WB8TSL
Re: HP 182T display/8559A SA - display only visible with beam find.

 

No, I'm in the UK



On Thu, 17 Feb 2022 at 10:32, Francesco <realfran@...> wrote:
you hare locate on USA?
?
?
Sent:?Thursday, February 17, 2022 at 7:54 AM
From:?"Tony" <tonycox01@...>
To:?[email protected]
Subject:?Re: [HP-Agilent-Keysight-equipment] HP 182T display/8559A SA - display only visible with beam find.
No - I have not been able to work out what is going on at all. I have two units affected in the?same way. Its pretty frustrating!
?
Tony
?
?
On Wed, 16 Feb 2022 at 23:21, Francesco <realfran@...> wrote:
Hello Tony, I got the same problem when I switch on work for 30 minutes after starting fading, if I push the "find beam" display only visible with beam find. Do you find the fault?
Best regards.
Francesco.

?

?
Re: Selling experience, sorry OT again

 

[quote] I don¡¯t like their new payment system. [/quote]

Same here. eBay Managed Payments is a bookeeping nightmare. But payments have been made the day after shipment quite reliably.
FS HP/AGILENT 70205A MMS display

 

For sale small display for the 70K MMS system. Tested OK but the front faceplate and RFI gasket are missing : front plate of the CRT is directly exposed (like the old 180X oscilloscopes), very bright display but don't use a hammer to adjust the tube... PM please.

IMG_20220217_120733.jpg

Re: Selling experience, sorry OT again

 

PayPal fees for FX are incredibly high, 3..5% worst foreign currency exchange rate, plus fees, etc.

You always have the option to dump epay all together and simply sell on your own website, our firm has done so since 1995, and never sell on epay.

For epay, What about payment via bank transfer? Physical paper bank check? Still.aloowed?

Jon
Re: HP 182T display/8559A SA - display only visible with beam find.

 

you hare locate on USA?
?
?
Sent:?Thursday, February 17, 2022 at 7:54 AM
From:?"Tony" <tonycox01@...>
To:[email protected]
Subject:?Re: [HP-Agilent-Keysight-equipment] HP 182T display/8559A SA - display only visible with beam find.
No - I have not been able to work out what is going on at all. I have two units affected in the?same way. Its pretty frustrating!
?
Tony
?
?
On Wed, 16 Feb 2022 at 23:21, Francesco <realfran@...> wrote:

Hello Tony, I got the same problem when I switch on work for 30 minutes after starting fading, if I push the "find beam" display only visible with beam find. Do you find the fault?
Best regards.
Francesco.

?

?
Re: Selling experience, sorry OT again

 

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Worse than that. Bay charges a higher transaction fee than PayPal.

73 de Brian,VK2GCE

?

From: [email protected] [mailto:[email protected]] On Behalf Of Dr. David Kirkby, Kirkby Microwave Ltd
Sent: Thursday, 17 February 2022 8:05 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Selling experience, sorry OT again

?

On Wed, 16 Feb 2022 at 02:33, peter bunge <bunge.pjp@...> wrote:

I sold something on Ebay but my money was put on hold for 2 weeks. My item is already delivered.
Here is the explanation:

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I may have no option than to accept eBays new terms and conditions, as I am losing sales. But at the minute, I have no auctions for VNA calibration kits on eBay, as I don¡¯t like their new payment system.?

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At least when payments were made via PayPal, you could confirm receipt of payment before shipping goods, we no longer have that.?

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I have definitely lost business as a result of not accepting eBay¡¯s new payment system, but I think it is morally wrong.?

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eBay are now getting interest-free loans on every transaction.?

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Dave

--

Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
Re: Selling experience, sorry OT again

 

On Wed, 16 Feb 2022 at 02:33, peter bunge <bunge.pjp@...> wrote:
I sold something on Ebay but my money was put on hold for 2 weeks. My item is already delivered.
Here is the explanation:

I may have no option than to accept eBays new terms and conditions, as I am losing sales. But at the minute, I have no auctions for VNA calibration kits on eBay, as I don¡¯t like their new payment system.?

At least when payments were made via PayPal, you could confirm receipt of payment before shipping goods, we no longer have that.?

I have definitely lost business as a result of not accepting eBay¡¯s new payment system, but I think it is morally wrong.?

eBay are now getting interest-free loans on every transaction.?

Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom
Re: Selling experience, sorry OT again

 

On 2/16/2022 5:55 PM, Andrew Hakman wrote:
> I thought they changed years ago to charging fees on the item price?+
> shipping.

Yes. And now they charge fees on any sales tax collected as well. So if you sell to a buyer who is not tax exempt, you get screwed even more! Almost sounds illegal.
Re: HP 182T display/8559A SA - display only visible with beam find.

 

No - I have not been able to work out what is going on at all. I have two units affected in the?same way. Its pretty frustrating!

Tony


On Wed, 16 Feb 2022 at 23:21, Francesco <realfran@...> wrote:
Hello Tony, I got the same problem when I switch on work for 30 minutes after starting fading, if I push the "find beam" display only visible with beam find. Do you find the fault?
Best regards.
Francesco.

Re: 8660C option H07, C12

 

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Thank you so much!

Gary Appel

On 2/16/2022 1:01 PM, bigpapak507@... wrote:

H07:?Provides contact closure on rear panel to ind. REMOTE or LOCAL operation?
C12:?Increased air circulation though modified Top Cover?

Re: Selling experience, sorry OT again

 

¿ªÔÆÌåÓý

Politicians shooting themselves in the foot again.? ? ? ? ? ?Jim Ford (in California)



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Jeremy Nichols <jn6wfo@...>
Date: 2/16/22 5:39 PM (GMT-08:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Selling experience, sorry OT again

One big example of an inventory tax is California, which has caused many companies to store their inventory in neighboring Nevada. Overnight shipping from Reno or Las Vegas to LA or San Francisco is relatively inexpensive so Nevada gains while California loses.?



On Wed, Feb 16, 2022 at 5:13 PM Harvey White <madyn@...> wrote:

No tax is stupid.? It does exactly what it's designed to do, generate revenue for a government.

Some states evaluate your car each year and tax you on a percentage of the value.? (Alabama is one)

Some states "evaluate" your personal property, decide what it's worth, and then tax you on that (property taxes).

All of them generate revenue.

That's the idea.

A stupid tax only is stupid if it doesn't generate money.

Harvey



On 2/16/2022 7:53 PM, Dave Seiter wrote:
Inventory tax is common (and stupid)

-Dave


On Wednesday, February 16, 2022, 01:51:19 PM PST, Andrew Curlik <kb2lmn@...> wrote:


My work place had to pay tax on spare parts over a limit kept for future possible use. How crazy is that? Buy a new part and pay tax then pay a yearly tax based on your inventory!?

Andrew


On Feb 16, 2022, at 4:33 PM, Mike Feher <n4fs@...> wrote:

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Most private sales are used items. Some have been sold many many times, yet in the States sales tax is collected every time any item is sold. They collect sales tax even if the item is from a foreign country. Now, they are informing the IRS with transactions every time your total goes over $600 in sales, you get a 1099K and has to be declared as income. Ridiculous. I no longer sell on eBay but I still buy, sadly way too much at my age. 73 ¨C Mike

?

Mike B. Feher, N4FS

848-245-9115

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From: [email protected] <[email protected]> On Behalf Of Robert G8RPI via
Sent: Wednesday, February 16, 2022 4:20 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] Selling experience, sorry OT again

?

Unfortunatly ebay have us over a barrel to some extent. My personal opinion is they don't want small qty private sellers. Probably becuse a number of them cause too many claims. You have to use "managed payments" in the UK now. Ieven if there is no holding period you still have to wait a few days for the payment to come through. I now put? 3 or 4 day shipping time on my listings so I at least have the postage cost in my account.

The worst thing I have had is an item sold to europe and not only did ebay charge me an additional international sales fee, they charged the seller 20% VAT and then charged me 10% comission on the VAT! As far as I can tell as a private individual selling a used item VAT should not have been charged in the first place.

Unfortunatly none of the alternative marketplaces have the exposure that ebay has.

Robert G8RPI.

--
Jeremy Nichols
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