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Re: E8285A dead

 

Just posting an update for the archives...

I replaced 29 capacitors on the power supply board: 28 electrolytic and one tantalum. Also replaced primary and secondary memory backup batteries as preventive maintenance.

On the first boot it came up error code 0040 on the self diagnostics. The service manual says that is Real-Time Clock failure, Memory board. The error appeared just the one time. It has come up all self tests passed on subsequent boots. I will assume that was just some clock confusion due to replacing the memory battery. I didn't even know it had a real time clock but will look into that.

All functions seem to be working normally.

73,
Paul N1BUG
Re: Selling experience, sorry OT again

 

The evidence:
I am now selling on test-equip-trader and Kijiji and looking at other?options.
I am still waiting for my money. Note the positive feedback and Ebay fees.?
I'm not sure if the fees are based on the $100 sale or the total including $35.97 postage.
If on the total a $5 sale with $50 shipping could actually lose you money. Ebay would take about $10.45

order1.png

deliver.png

FB.png

account.png

On Tue, Feb 15, 2022 at 9:33 PM peter bunge via <bunge.pjp=[email protected]> 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:

Me: No one has ever given me less than 100% FB in over 20 years.

12:37:53 UTC Arnel

Yes I totally understand and I can see that the system detected that the account was a casual seller on site. As for your reference, for this not to happen in the future, you need meet these three (3) requirements: You have to be actively selling on site for more than 90 days. The account have more than 25 domestic transactions. The account have more than ?165 total sales. Once you have met these three (3) requirements the funds will never be placed on hold again.

What is more they took 20% and I have to fight to get my funds which I have not yet seen.Maybe they hope some people will forget.
I am looking for an alternative to ebay. Has anyone used Bonanza? What are you guys using? I just started using test-equip-trader.
What about Paypal? Any suggestions or are they still reasonable to use to buy and sell.
Re: Newbie question about Agilent 53131a Universal Counter

 

No inputs on back but good info to know!

thanks
Re: Newbie question about Agilent 53131a Universal Counter

 

Dan, you are spot on after reading the manual last night, was up very, very late! I did look at the specs and realize the signal was extremely week and once hooked to back it worked perfectly.?


thanks?
Re: Newbie question about Agilent 53131a Universal Counter

 

Also worth checking is whether you have a model with the rear A/B inputs.

Both front and back inputs are active at the same time so if you leave the back ones unterminated you will get reflections causing attenuation. You need to terminate the back inputs if present (or disconnect them internally).
Re: HP 8595E Restore and Tracking Generator Questions

 

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Dave,

The mod looks pretty straight forward. I¡¯ll get it done this weekend. ? We¡¯re you ever able to repair any of those relays?


- Chad

On Feb 15, 2022, at 10:35 AM, Dave Wright <davewrightsplace@...> wrote:

?Jim,

HP uses a mechanically latched relay in the 8593E and others. But, the drive circuit is not an impulse type. The current is continuous, and leads to excess dissipation in the coils.
Details here:?/g/HP-Agilent-Keysight-equipment/topic/31717125#96700

_Dave KC6UPS

Re: 141S Operation and Service manual

 

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Hi Christopher,
I have a paper one dated Oct 1968 for instruments with prefix 825
I've attached a quick and dirty scan of the adjustments section if that helps at all?
I only have an Epson A4 scanner with document feeder hinged along the 'long' edge of the platform - which is not great for scanning books (let alone the fold-out schematics!) but if there are other sections that would be helpful, let me know and I'll give it a go.
Adrian
On 16/02/2022 09:51, Christopher Tucker via groups.io wrote:

All,

Would anyone have a paper or digital version of the 141S Display Section Operation and Service manual? I have been able to share some of the adjustments with my 140S and 140T manuals, but the board in the photo I am looking to understand how to adjust it. I assume it is for the storage/persistence feature that differentiates it from a 140S.

The issue I am having with one is the intensity will increase, then drop-off when the knob is turned more than halfway. I saw some threads that this could be material building up on the electrodes in the tube.

On the other, the intensity is working normally, but I would like to optimize the settings for storage and write time periods.

Christopher

Attachments:


HP141S_Adjustments.pdf
HP141S_Adjustments.pdf

141S Operation and Service manual

 

All,

Would anyone have a paper or digital version of the 141S Display Section Operation and Service manual? I have been able to share some of the adjustments with my 140S and 140T manuals, but the board in the photo I am looking to understand how to adjust it. I assume it is for the storage/persistence feature that differentiates it from a 140S.

The issue I am having with one is the intensity will increase, then drop-off when the knob is turned more than halfway. I saw some threads that this could be material building up on the electrodes in the tube.

On the other, the intensity is working normally, but I would like to optimize the settings for storage and write time periods.

Christopher

board-1.jpg
board-2.jpg

Re: Newbie question about Agilent 53131a Universal Counter

 

On 2/15/2022 6:41 PM, Andrew Curlik wrote:

I took a video of what I¡¯m seeing.
Drew according to your SA in the video you are putting about -60 dBm into the counter, that will not work.? Try the 10 MHz output from the counter,

Dan
Re: Newbie question about Agilent 53131a Universal Counter

 

On 2/15/2022 5:20 PM, Andrew Curlik wrote:

Hello all, this may be a stupid question but I just purchased a 53131a with 3GHz option and can¡¯t get a frequency to show up on input 1 or 2.
Drew,

If it runs the self test on power up, and you get the message SELFTST: PASS followed by the HPIB address it should then default to Channel 1 frequency measurement.? Simplest check is to connect the 10 MHz output at the back to Channel 1 input, then switch to channel 2 and do the same.? This is all covered in the manual which I'm pretty sure can be found on line.? There is also a full self test you can invoke, details in the (service) manual.

There's a lot to learn from the manuals, hours of fun reading :^)

Dan

ac6ao / g3ncr
Re: Newbie question about Agilent 53131a Universal Counter

 

I took a video of what I¡¯m seeing.?


?
Selling experience, sorry OT again

 

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

Me: No one has ever given me less than 100% FB in over 20 years.

12:37:53 UTC Arnel

Yes I totally understand and I can see that the system detected that the account was a casual seller on site. As for your reference, for this not to happen in the future, you need meet these three (3) requirements: You have to be actively selling on site for more than 90 days. The account have more than 25 domestic transactions. The account have more than ?165 total sales. Once you have met these three (3) requirements the funds will never be placed on hold again.

What is more they took 20% and I have to fight to get my funds which I have not yet seen.Maybe they hope some people will forget.
I am looking for an alternative to ebay. Has anyone used Bonanza? What are you guys using? I just started using test-equip-trader.
What about Paypal? Any suggestions or are they still reasonable to use to buy and sell.
Re: Newbie question about Agilent 53131a Universal Counter

 

Exact, I mistyped the correct funcion...I have a similar problem on my 53131a but it looks like to be a relay. Ch1 does not work, but if I change to ch2 and back to ch1 it works flawlessly

Enviado do meu Tele-Movel

Em ter, 15 de fev de 2022 23:03, Andrew Curlik <kb2lmn@...> escreveu:

I¡¯ve selected input 1 and 2 via the Frequency & Ratio button and channel 1 or 2 light blinks. It¡¯s in Run if that¡¯s Auto??

Drew


On Feb 15, 2022, at 8:56 PM, Alexandre Souza <alexandre.tabajara@...> wrote:

?
No question is stupid, but...have you selected input 1 or input 2? Is it in auto or single?

Enviado do meu Tele-Movel

Em ter, 15 de fev de 2022 22:28, Andrew Curlik <kb2lmn@...> escreveu:

Hello all, this may be a stupid question but I just purchased a 53131a with 3GHz option and can¡¯t get a frequency to show up on input 1 or 2. Being new to this I¡¯m not sure if I have a setting wrong possibly as input 3 functions.?
I¡¯m feeding a 20MHz up to 200MHz 0.0dbm signal from my HP 8656A and the counter won¡¯t show anything on input 1 or 2. When I put signal to port 3 at 200MHz and up I get a frequency reading on the counter. I verified the Signal Generator is working with my spectrum analyzer.?


Drew
Re: Newbie question about Agilent 53131a Universal Counter

 

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I¡¯ve selected input 1 and 2 via the Frequency & Ratio button and channel 1 or 2 light blinks. It¡¯s in Run if that¡¯s Auto??

Drew


On Feb 15, 2022, at 8:56 PM, Alexandre Souza <alexandre.tabajara@...> wrote:

?
No question is stupid, but...have you selected input 1 or input 2? Is it in auto or single?

Enviado do meu Tele-Movel

Em ter, 15 de fev de 2022 22:28, Andrew Curlik <kb2lmn@...> escreveu:

Hello all, this may be a stupid question but I just purchased a 53131a with 3GHz option and can¡¯t get a frequency to show up on input 1 or 2. Being new to this I¡¯m not sure if I have a setting wrong possibly as input 3 functions.?
I¡¯m feeding a 20MHz up to 200MHz 0.0dbm signal from my HP 8656A and the counter won¡¯t show anything on input 1 or 2. When I put signal to port 3 at 200MHz and up I get a frequency reading on the counter. I verified the Signal Generator is working with my spectrum analyzer.?


Drew
Re: Newbie question about Agilent 53131a Universal Counter

 

No question is stupid, but...have you selected input 1 or input 2? Is it in auto or single?

Enviado do meu Tele-Movel

Em ter, 15 de fev de 2022 22:28, Andrew Curlik <kb2lmn@...> escreveu:

Hello all, this may be a stupid question but I just purchased a 53131a with 3GHz option and can¡¯t get a frequency to show up on input 1 or 2. Being new to this I¡¯m not sure if I have a setting wrong possibly as input 3 functions.?
I¡¯m feeding a 20MHz up to 200MHz 0.0dbm signal from my HP 8656A and the counter won¡¯t show anything on input 1 or 2. When I put signal to port 3 at 200MHz and up I get a frequency reading on the counter. I verified the Signal Generator is working with my spectrum analyzer.?


Drew
Newbie question about Agilent 53131a Universal Counter

 

Hello all, this may be a stupid question but I just purchased a 53131a with 3GHz option and can¡¯t get a frequency to show up on input 1 or 2. Being new to this I¡¯m not sure if I have a setting wrong possibly as input 3 functions.?
I¡¯m feeding a 20MHz up to 200MHz 0.0dbm signal from my HP 8656A and the counter won¡¯t show anything on input 1 or 2. When I put signal to port 3 at 200MHz and up I get a frequency reading on the counter. I verified the Signal Generator is working with my spectrum analyzer.?


Drew
Re: Agilent 44xx ESG RF Generator question

 

Hi all,

and a 401 point sweep with minimal dwell time of 1ms takes around 22-23s to complete.

Br
Marcus
Re: Agilent 44xx ESG RF Generator question

 

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Hi,

?

The E44xx series generators do not have continuous sweep. So, as you mentioned, there are sweep from a list or by defined step, but only for 401 points maximum.

?

Yves

De?: [email protected] <[email protected]> De la part de Howard Hoyt
·¡²Ô±¹´Ç²â¨¦?: 15 f¨¦vrier 2022 16:18
??: [email protected]
Objet?: [HP-Agilent-Keysight-equipment] Agilent 44xx ESG RF Generator question

?

Hello,
I am considering the purchase of an RF generator for R&D and RF alignment purposes.? Looking at the Agilent 44xx series, it looks like the sweep functions are Step and List Sweeps.? I read the manual for these generators and could not find any reference to a continuous frequency sweep.? Has anyone experience with these to clarify?? In order to see ripple on a filter passband, continuous sweeps would be most valuable.
Cheers!

Howard Hoyt
Agilent 44xx ESG RF Generator question

 

Hello,
I am considering the purchase of an RF generator for R&D and RF alignment purposes.? Looking at the Agilent 44xx series, it looks like the sweep functions are Step and List Sweeps.? I read the manual for these generators and could not find any reference to a continuous frequency sweep.? Has anyone experience with these to clarify?? In order to see ripple on a filter passband, continuous sweeps would be most valuable.
Cheers!

Howard Hoyt
Re: HP141T SA Blowing Fuses

 

Listen to Dave Wise. His info on the TL431 fix for the Krypton doped neon lamp works very well.
It¡¯s in the group photo section, page 4 I think. Add the diode he mentions in the text for better thermal stability.

Chris
W9RP

On Feb 15, 2022, at 2:53 PM, Steve Hendrix <SteveHx@...> wrote:

?I had a very similar rig and had to replace the fuses with slo-blo types. That feels like mostly a band-aid, but it worked.

Steve Hendrix

On 2022-02-15 02:05 PM, Tim Barrett K9VB wrote:
I was recently given an HP141T / 8552B / 8554B spectrum analyzer by a retired electronics engineer. It looks ine xcellent condition and I believe he would have looked after it. He warned me that it tended to blow fuses when it had not been powered up for a while and he even gave me a pack of 1 amp fuses.
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