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Wanted: spare internal 10 dB pad for HP 8562A A9 input attenuator

f1gwr
 

Anyone knows how to get?at decent price?a working order 22 or 26.5 GHz 10 dB glass replacement pad (so-called "Attenuation Card"), that's found in the 70 dB A9 input step attenuator of my 8562A SA?
Several part numbers, electrically matching A9 may be found:
5086-7371
5086-7783
5086-5783
5086-7796
5086-7822
5086-7842
8340-60175
8673-60043
8673-60044
33321-60038
33321-60039
33321-60057
33321-60058
33321-60061
33321-60080
83595-60019
85660-60301
HP8495K
HP 33321D/K/RF/RG/RU/RV/T
HP 33323K
N4413-80004



So I'm just looking for that 10 dB pad, not necessarily a $100-300+ complete assembly.
Please note: 18 GHz 10 dB pads mechanically don't fit.
Re: Weinschel step attenuator gets stuck

 

Hi Ian,

many thanks for the warm welcome. Now it's over with being incognito ;-)
I'm trying to get into the high GHz field using high notch second hand HP equipment.
Here's my complete HP inventory for the records:
HP425A (excellent uV meter with valves, that I could rescue from junk and fix it successfully)
HP3430A (DVM, also rescued from junk, nice, but a bit bulky, not used lately)
HP34401A (impressive 6.5 digit multimeter, purchased recently)
HP8350B+HP83529A (cool sweeper 10MHz...20GHz, purchased recently. I'm using it a lot. Quite instructive to see how various coax cables behave at 18GHz.)
HP8593E (my latest purchase, 26.5GHz SA to replace a borrowed HP8591A).
I might need advice on the HP8593E soon when I have time to take care. I have the impression that the highest band (19GHz...26GHz) shows 10dB to low amplitudes, verified with the sweeper as signal source up to 20.4GHz and double-checked against a Gigatronics power meter, which nicely matches the HP83529A output power display within a few tenths of a dB). The noise floor of that band displays 5dB lower that that of the previous band. I would have expected it to be 5dB higher than that of the previous band as harmonic mixing gets increasingly less efficient at higher harmonics. I wonder if this can be fixed with a software setting.

Best regards,
Tom DG8SAQ
Re: Weinschel step attenuator gets stuck

 

Hi Rastro,

many thanks for the very informative links! From what I can tell, the Weinschel attenuators are mechanically absolutely identical with the HP ones, either one builts in license from the other or all come from the same source.

Best regards,
Tom
Re: Need HP34401A GPIB help

 

Many thanks for helping me on the syntax. Works great!
Somehow, I thought nothing ought to follow the question mark...
Re: HP3326A Noisy fan

 

Hi Gary,

I had a similar problem with a HP5335A counter. What I did was to design a circuit board and place 10 series resistors on it, each 15 ohm, 0.25 W. These resistors were placed in series with the DC fan. I mounted the board inside the unit on the right side with four screws.
Perfect, nice and quiet.

G?ran
Re: HP 3709B Constellation Analyzer

Dave Brown
 

----- Original Message -----
From: "f1gwr f1gwr@... [hp_agilent_equipment]" <hp_agilent_equipment@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, February 25, 2016 9:28 PM
Subject: Re: [hp_agilent_equipment] HP 3709B Constellation Analyzer


A bit late but if you didn't find yet here's one:

A the related HP Journal:

Link is valid on a 30 days since last download basis. Later just drop a request direct to my email.

Christian


Le 21 nov. 2015 ??? 17:48, starmux64@... [hp_agilent_equipment] a ???crit :


I have acquired one of these in good condition and apparently working. I have not been able to find a Manual for it online. Before I try powering it up, has anyone got a .pdf Manual that they can send me please?



It was used to display constellation patterns of digital radios with distortion measurements and is described in HP Journal of July 1987. It needed a high impedance interface kit 15709A which I don't have. It looks too good to scrap so I wondered if it had any other general purpose use.



Steve
Re: HP 3709B Constellation Analyzer

 

Bonjour Christian
Merci beaucoup pour le manual et journal.
Cordialement
Steve


From: "f1gwr f1gwr@... [hp_agilent_equipment]"
To: hp_agilent_equipment@...
Sent: Thursday, February 25, 2016 8:28 AM
Subject: Re: [hp_agilent_equipment] HP 3709B Constellation Analyzer

?
A bit late but if you didn't find yet here's one:
A the related HP Journal:

Link is valid on a 30 days since last download basis. Later just drop a request direct to my email.

Christian


Le 21 nov. 2015 ¨¤ 17:48, starmux64@... [hp_agilent_equipment] a ¨¦crit :

?

I have acquired one of these in good condition and apparently working. I have not been able to find a Manual for it online.? Before I try powering it up, has anyone got a .pdf Manual that they can send me please?

It was used to display constellation patterns of digital radios with distortion measurements and is described in HP Journal of July 1987.? It needed a high impedance interface kit 15709A which?I don't have.? It looks too good to scrap so I wondered if it had any other general purpose use.

Steve?
Re: HP 3709B Constellation Analyzer

f1gwr
 

A bit late but if you didn't find yet here's one:
A the related HP Journal:

Link is valid on a 30 days since last download basis. Later just drop a request direct to my email.

Christian


Le 21 nov. 2015 ¨¤ 17:48, starmux64@... [hp_agilent_equipment] a ¨¦crit :

?

I have acquired one of these in good condition and apparently working. I have not been able to find a Manual for it online.? Before I try powering it up, has anyone got a .pdf Manual that they can send me please?


It was used to display constellation patterns of digital radios with distortion measurements and is described in HP Journal of July 1987.? It needed a high impedance interface kit 15709A which?I don't have.? It looks too good to scrap so I wondered if it had any other general purpose use.


Steve?
Re: OT Rod terminating resistor

 

Yes, I asking for 3 samples and few days later was contacted by guy from France, company representing them for Europe. Typical story, what's project, annual prevision....and at end he come with small quantity "sample" price of about 25USD for BeO and 20USD for Alumina substrate!
BTW, I have very good experience with many other companies regarding the free samples of semiconductors, IC's and optoelectronics.

Milan

On 24 Feb 2016 11:25 pm, "robert8rpi@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:

?

Hi,
Have you tried asking them for a sample? you would be surprised what results a nice letter or even email can get.

Robert G8RPI
Re: Spring loaded Old Style Front Panel Buttons

 

¿ªÔÆÌåÓý

Ok that makes more sense! Thanks Chuck.

?

Gary? K4FMX

?

From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Wednesday, February 24, 2016 11:19 PM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] Spring loaded Old Style Front Panel Buttons

?

?

Oh, one thing I didn't make clear, you have to remove
the panel circuit board from the panel bezel and overlay.
You do not have to, nor should you, remove the key tops
from the switches.

-Chuck Harris

Chuck Harris cfharris@... [hp_agilent_equipment] wrote:
> Hi Gary,
>
> What I do is remove the front panel from the instrument, and set
> it on a pan to catch the drippings. Then I take a little pump
> sprayer, like is used for windex, and liberally hose down the
> entire switch area with IPA. While I do this, I push the buttons
> multiple times to get the IPA under the springs, and wash out the
> remnants of the grease. I then hose it down a couple of times more
> with more IPA.
>
> After that is done, I let the panel drip, for a few minutes, and
> then blow the IPA off gently with compressed air. The more IPA
> you can remove mechanically, the cleaner the springs and switches
> will be.
>
> After blowing the IPA off, put the panel in a warm place, and let
> the remaining IPA evaporate, and you are back in business.
>
> -Chuck Harris
>
> 'Gary Schafer' garyschafer@... [hp_agilent_equipment] wrote:
>> Hi Chuck,
>>
>>
>>
>> Are you saying that you can clean the switches with IPA without taking the
>> keyboard apart or removing it from the instrument? Do you just spray it in
>> along side of the keys?
>>
>>
>>
>> I have an HP 3326A with keys that are kind of hard to push.
>>
>>
>>
>> Thanks
>>
>> Gary K4FMX
>>
>>
>>
>> _____
>>
>> From: hp_agilent_equipment@...
>> [mailto:hp_agilent_equipment@...]
>> Sent: Wednesday, February 24, 2016 4:56 PM
>> To: hp_agilent_equipment@...
>> Subject: Re: [hp_agilent_equipment] Spring loaded Old Style Front Panel
>> Buttons
>>
>>
>>
>>
>>
>> I have advocated washing the assembled keyboards with
>> 91 or 99% IPA before on this board. It changes the
>> character of the keys from something that feels like
>> you are going to do damage, to something that feels
>> nice.
>>
>> I think that HP put the grease on the springs to modify
>> the feel.... perhaps preferring a strong click? The grease
>> will stick the spring to the plunger until it abruptly
>> gives way, and the key pushed down.
>>
>> I think it was a bad idea given the adverse long term
>> effects of dried grease.
>>
>> I have left all of my keyboards dry, and they seem
>> perfect.
>>
>> -Chuck Harris
>>
>> Barry n4buq@... [hp_agilent_equipment] wrote:
>>> Hi Adrian,
>>>
>>> Okay - I may give that a try. I wonder if there was any grease originally
>> in the
>>> mechanisms that has dried up and possibly should be replaced after
>> cleaning?
>>>
>>> Thanks, Barry - N4BUQ
>>>

>>> ----- Original Message -----
>>>> From: "Adrian Nicol fenland787@... [hp_agilent_equipment]"
>>>> To: "hp agilent equipment"
>>>> Sent: Wednesday, February 24, 2016
>>>> 9:52:43 AM Subject: Re: [hp_agilent_equipment] Spring loaded Old Style
>> Front
>>>> Panel Buttons
>>>>
>>>> Hi Barry, short answer is yes, that is the reason and the fix is dead
>> easy and
>>>> really effective, if my experience is anything to go by. There is a
>> parallel
>>>> thread running where I and others have posted their solutions - I just
>> did a
>>>> 3456A and 3455A as well as an 8566A and other gear - but this is what I
>> did:
>>>>
>>>> Remove the switch PCB from the panel, flood spray the switches with IPA
>> (Isoprop
>>>> alcohol) and operate each a few times, within just three or four
>> operations they
>>>> free up like magic going from clunky
>> 'feels-like-something-is-about-to-bust' to
>>>> almost silky smooth! Then blow it off with an air-gun and give it another
>> dose
>>>> for luck. Works for me anyway!
>>>>
>>>>
>>>> On Wednesday, February 24, 2016 3:09 PM, "Chuck Harris cfharris@...
>>>> [hp_agilent_equipment]" >>
>>
>>
>>
>
>
> ------------------------------------
> Posted by: Chuck Harris
> ------------------------------------
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>
>
Re: HP 16505a and 16500b/c scsi interface

 

On Wed, Feb 24, 2016 at 7:00 PM, Marc Howard marc.howard@...
[hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

I had the opposite problem. I had the disk but not the adapter. But they pop up often on eBay without the software.

I wish there was a 16700 port of that software.

Anyway, I'll try to pull it off my 16500 and upload it to the files section this weekend.

Marc
But there is. By coincidence I just installed the 16700 native config
and IA files on a 16700B for an E2423A SCSI Bus Preprocessor.

Just grab the FuturePlus FS2230 / FS2232 files:

(16700)
(16500)

The 16700 files (DISK1.DAT, INDEX.TXT, INFO.TXT) need to be copied to
a floppy and then you need to do a software installation from the
files on the floppy.

-Glen
Re: Spring loaded Old Style Front Panel Buttons

 

Oh, one thing I didn't make clear, you have to remove
the panel circuit board from the panel bezel and overlay.
You do not have to, nor should you, remove the key tops
from the switches.

-Chuck Harris

Chuck Harris cfharris@... [hp_agilent_equipment] wrote:

Hi Gary,

What I do is remove the front panel from the instrument, and set
it on a pan to catch the drippings. Then I take a little pump
sprayer, like is used for windex, and liberally hose down the
entire switch area with IPA. While I do this, I push the buttons
multiple times to get the IPA under the springs, and wash out the
remnants of the grease. I then hose it down a couple of times more
with more IPA.

After that is done, I let the panel drip, for a few minutes, and
then blow the IPA off gently with compressed air. The more IPA
you can remove mechanically, the cleaner the springs and switches
will be.

After blowing the IPA off, put the panel in a warm place, and let
the remaining IPA evaporate, and you are back in business.

-Chuck Harris

'Gary Schafer' garyschafer@... [hp_agilent_equipment] wrote:
Hi Chuck,



Are you saying that you can clean the switches with IPA without taking the
keyboard apart or removing it from the instrument? Do you just spray it in
along side of the keys?



I have an HP 3326A with keys that are kind of hard to push.



Thanks

Gary K4FMX



_____

From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: Wednesday, February 24, 2016 4:56 PM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] Spring loaded Old Style Front Panel
Buttons





I have advocated washing the assembled keyboards with
91 or 99% IPA before on this board. It changes the
character of the keys from something that feels like
you are going to do damage, to something that feels
nice.

I think that HP put the grease on the springs to modify
the feel.... perhaps preferring a strong click? The grease
will stick the spring to the plunger until it abruptly
gives way, and the key pushed down.

I think it was a bad idea given the adverse long term
effects of dried grease.

I have left all of my keyboards dry, and they seem
perfect.

-Chuck Harris

Barry n4buq@... [hp_agilent_equipment] wrote:
Hi Adrian,

Okay - I may give that a try. I wonder if there was any grease originally
in the
mechanisms that has dried up and possibly should be replaced after
cleaning?

Thanks, Barry - N4BUQ

----- Original Message -----
From: "Adrian Nicol fenland787@... [hp_agilent_equipment]"
<hp_agilent_equipment@...> To: "hp agilent equipment"
<hp_agilent_equipment@...> Sent: Wednesday, February 24, 2016
9:52:43 AM Subject: Re: [hp_agilent_equipment] Spring loaded Old Style
Front
Panel Buttons

Hi Barry, short answer is yes, that is the reason and the fix is dead
easy and
really effective, if my experience is anything to go by. There is a
parallel
thread running where I and others have posted their solutions - I just
did a
3456A and 3455A as well as an 8566A and other gear - but this is what I
did:

Remove the switch PCB from the panel, flood spray the switches with IPA
(Isoprop
alcohol) and operate each a few times, within just three or four
operations they
free up like magic going from clunky
'feels-like-something-is-about-to-bust' to
almost silky smooth! Then blow it off with an air-gun and give it another
dose
for luck. Works for me anyway!


On Wednesday, February 24, 2016 3:09 PM, "Chuck Harris cfharris@...
[hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:



------------------------------------
Posted by: Chuck Harris <cfharris@...>
------------------------------------


------------------------------------

Yahoo Groups Links
Re: Spring loaded Old Style Front Panel Buttons

 

Hi Gary,

What I do is remove the front panel from the instrument, and set
it on a pan to catch the drippings. Then I take a little pump
sprayer, like is used for windex, and liberally hose down the
entire switch area with IPA. While I do this, I push the buttons
multiple times to get the IPA under the springs, and wash out the
remnants of the grease. I then hose it down a couple of times more
with more IPA.

After that is done, I let the panel drip, for a few minutes, and
then blow the IPA off gently with compressed air. The more IPA
you can remove mechanically, the cleaner the springs and switches
will be.

After blowing the IPA off, put the panel in a warm place, and let
the remaining IPA evaporate, and you are back in business.

-Chuck Harris

'Gary Schafer' garyschafer@... [hp_agilent_equipment] wrote:

Hi Chuck,



Are you saying that you can clean the switches with IPA without taking the
keyboard apart or removing it from the instrument? Do you just spray it in
along side of the keys?



I have an HP 3326A with keys that are kind of hard to push.



Thanks

Gary K4FMX



_____

From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: Wednesday, February 24, 2016 4:56 PM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] Spring loaded Old Style Front Panel
Buttons





I have advocated washing the assembled keyboards with
91 or 99% IPA before on this board. It changes the
character of the keys from something that feels like
you are going to do damage, to something that feels
nice.

I think that HP put the grease on the springs to modify
the feel.... perhaps preferring a strong click? The grease
will stick the spring to the plunger until it abruptly
gives way, and the key pushed down.

I think it was a bad idea given the adverse long term
effects of dried grease.

I have left all of my keyboards dry, and they seem
perfect.

-Chuck Harris

Barry n4buq@... [hp_agilent_equipment] wrote:
Hi Adrian,

Okay - I may give that a try. I wonder if there was any grease originally
in the
mechanisms that has dried up and possibly should be replaced after
cleaning?

Thanks, Barry - N4BUQ

----- Original Message -----
From: "Adrian Nicol fenland787@... [hp_agilent_equipment]"
<hp_agilent_equipment@...> To: "hp agilent equipment"
<hp_agilent_equipment@...> Sent: Wednesday, February 24, 2016
9:52:43 AM Subject: Re: [hp_agilent_equipment] Spring loaded Old Style
Front
Panel Buttons

Hi Barry, short answer is yes, that is the reason and the fix is dead
easy and
really effective, if my experience is anything to go by. There is a
parallel
thread running where I and others have posted their solutions - I just
did a
3456A and 3455A as well as an 8566A and other gear - but this is what I
did:

Remove the switch PCB from the panel, flood spray the switches with IPA
(Isoprop
alcohol) and operate each a few times, within just three or four
operations they
free up like magic going from clunky
'feels-like-something-is-about-to-bust' to
almost silky smooth! Then blow it off with an air-gun and give it another
dose
for luck. Works for me anyway!


On Wednesday, February 24, 2016 3:09 PM, "Chuck Harris cfharris@...
[hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:
Re: HP 16505a and 16500b/c scsi interface

 

Thanks a lot!

2016-02-25 0:42 GMT-03:00 brunonorth@... [hp_agilent_equipment] <hp_agilent_equipment@...>:

?

Thanks, that would be great to have the?E2423A?files online.? That's a bit of sad news that they don't work with 16700.? Though it justifies keeping a 16500 around.
Re: BRIGHT Replacement LCD for 8753/8720 VNAs with dim LCD displays

 

Unfortunately the SimmConn kits are not designed to replace the 8753D/E displays.
Re: 8555a indicator/cord mod for DVM..

 

¿ªÔÆÌåÓý

Back in the day when I worked on a LOT of these 8555A's, I considered making a small digital voltmeter to emulate the digital readout in the 8445 Preselector: It reads a gated voltage from the 141T/8555A to display the center frequency and is scaled to read in 1 Volt/GHz. Very easy. Nice thing would be that all the mechanical dials, etc go away in the plug-in, only the bandswitch and the pot remain. You would lose the harmonic indicator stuff though, if you even use it.? You could also just get a preselector with readout and use that, ignore the dial cord issue completely.
?
Jeff Kruth
WA3ZKR
?
Re: HP 16505a and 16500b/c scsi interface

 

Thanks, that would be great to have the?E2423A?files online. ?That's a bit of sad news that they don't work with 16700. ?Though it justifies keeping a 16500 around.
HP3326A Noisy fan

 

I have an HP3326A with a very noisy fan. It doesn't sound like the motor has
bad bearings or anything else. Just lots of air noise. It is a lot louder
than other HP gear that I have.
Is there any cure for this? Is it a good idea to slow the fan down in this
generator?

Thanks
Gary K4FMX
Re: HP 16505a and 16500b/c scsi interface

 

I had the opposite problem.? I had the disk but not the adapter.? But they pop up often on eBay without the software.

I wish there was a 16700 port of that software.

Anyway, I'll try to pull it off my 16500 and upload it to the files section this weekend.

Marc

On Wed, Feb 24, 2016 at 6:41 PM, brunonorth@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
?

By source, I mean an online respository such as the HP/Agilent Test Equipment Group Files or similar were I (or others) could access them to use them with a used E2423A that doesn't include the disk.
Re: 8555a indicator/cord replacement or modification

 

One more thing - depending on the microwave counter used, and it's signal kickout, it may add some spurs to the displayed signal. There's not much isolation on the 1LO port. If anything looks suspicious, it can be confirmed by disconnecting the counter.

Ed
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