Re: 8568B fan replacement
It also makes pretty darn good emergency gasket material for flanges in water systems. Some of that and a Leatherman and you're back in service in minutes.
I like the vice idea too.
toggle quoted message
Show quoted text
On 7/2/2017 11:48 AM, Dave McGuire Mcguire@... [hp_agilent_equipment] wrote:
I have effectively unlimited storage space for this sort of stuff.
That said, however, a 30yd dumpster would probably be a bit much. ;) I
myself don't foresee needing a bunch; my idea is to save enough to pass
around, as not everyone happens across a commercial roofing job just
when they happen to need something like this.
-Dave
On 07/02/2017 11:40 AM, Peter Gottlieb hpnpilot@...
[hp_agilent_equipment] wrote:
Last job I was a part of there was a 30 yard dumpster full of scraps. Be
careful what you ask for! I saved about 20 pounds of the stuff in good sized
pieces, probably a lifetime supply.
On 7/2/2017 11:34 AM, Dave McGuire Mcguire@... [hp_agilent_equipment]
wrote:
I am three days away from starting a re-roofing project on a large
commercial building. We're putting a rubber roof up there. I will ask
the roofers to save the scraps for me; I'll set them aside in case
anyone needs them. I expect that they'll be at that stage in about a week.
-Dave
On 07/02/2017 10:23 AM, Peter Gottlieb hpnpilot@...
[hp_agilent_equipment] wrote:
Interesting idea. Commercial roofs are made with rubber sheet and any
friendly roofer will gladly give you as much as you care to carry off
from the trimmings.
Peter
On Jul 2, 2017, at 9:57 AM, Jeremy Nichols jn6wfo@...
<mailto:jn6wfo@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
That's a good idea, Chris. Another source of rubber sheeting is the
stuff people buy to line backyard water features. A dealer might sell
you a scrap of a few feet for almost nothing.
Jeremy
On Sun, Jul 2, 2017 at 1:40 AM chris.hayes60@...
<mailto:chris.hayes60@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
__
I find fan noise annoying, so I replace 5" fans with quiet 3" or
4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner
tube). Most equipment has a convenient supply. I've even run a 12V
fan from the raw dc supply going to the 5V regulator. The rubber
sheet acts as a good vibration isolator as well as a airtight
seal. Just make sure that the cf/m rating is high enough.
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: 8568B fan replacement
I have effectively unlimited storage space for this sort of stuff. That said, however, a 30yd dumpster would probably be a bit much. ;) I myself don't foresee needing a bunch; my idea is to save enough to pass around, as not everyone happens across a commercial roofing job just when they happen to need something like this. -Dave On 07/02/2017 11:40 AM, Peter Gottlieb hpnpilot@... [hp_agilent_equipment] wrote: Last job I was a part of there was a 30 yard dumpster full of scraps. Be
careful what you ask for! I saved about 20 pounds of the stuff in good sized
pieces, probably a lifetime supply.
On 7/2/2017 11:34 AM, Dave McGuire Mcguire@... [hp_agilent_equipment]
wrote:
I am three days away from starting a re-roofing project on a large
commercial building. We're putting a rubber roof up there. I will ask
the roofers to save the scraps for me; I'll set them aside in case
anyone needs them. I expect that they'll be at that stage in about a week.
-Dave
On 07/02/2017 10:23 AM, Peter Gottlieb hpnpilot@...
[hp_agilent_equipment] wrote:
Interesting idea. Commercial roofs are made with rubber sheet and any
friendly roofer will gladly give you as much as you care to carry off
from the trimmings.
Peter
On Jul 2, 2017, at 9:57 AM, Jeremy Nichols jn6wfo@...
<mailto:jn6wfo@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
That's a good idea, Chris. Another source of rubber sheeting is the
stuff people buy to line backyard water features. A dealer might sell
you a scrap of a few feet for almost nothing.
Jeremy
On Sun, Jul 2, 2017 at 1:40 AM chris.hayes60@...
<mailto:chris.hayes60@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
__
I find fan noise annoying, so I replace 5" fans with quiet 3" or
4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner
tube). Most equipment has a convenient supply. I've even run a 12V
fan from the raw dc supply going to the 5V regulator. The rubber
sheet acts as a good vibration isolator as well as a airtight
seal. Just make sure that the cf/m rating is high enough.
-- Dave McGuire, AK4HZ New Kensington, PA
|
Re: 8568B fan replacement
It makes good material to place in the jaws of your vice or pliers to keep from marring the surface of what you are working on.
Glenn
toggle quoted message
Show quoted text
On 7/2/2017 11:40 AM, Peter Gottlieb hpnpilot@... [hp_agilent_equipment] wrote: Last job I was a part of there was a 30 yard dumpster full of scraps. Be
careful what you ask for! I saved about 20 pounds of the stuff in good sized
pieces, probably a lifetime supply.
On 7/2/2017 11:34 AM, Dave McGuire Mcguire@... [hp_agilent_equipment]
wrote:
I am three days away from starting a re-roofing project on a large
commercial building. We're putting a rubber roof up there. I will ask
the roofers to save the scraps for me; I'll set them aside in case
anyone needs them. I expect that they'll be at that stage in about a week.
-Dave
On 07/02/2017 10:23 AM, Peter Gottlieb hpnpilot@...
[hp_agilent_equipment] wrote:
Interesting idea. Commercial roofs are made with rubber sheet and any
friendly roofer will gladly give you as much as you care to carry off
from the trimmings.
Peter
On Jul 2, 2017, at 9:57 AM, Jeremy Nichols jn6wfo@...
<mailto:jn6wfo@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
That's a good idea, Chris. Another source of rubber sheeting is the
stuff people buy to line backyard water features. A dealer might sell
you a scrap of a few feet for almost nothing.
Jeremy
On Sun, Jul 2, 2017 at 1:40 AM chris.hayes60@...
<mailto:chris.hayes60@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
__
I find fan noise annoying, so I replace 5" fans with quiet 3" or
4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner
tube). Most equipment has a convenient supply. I've even run a 12V
fan from the raw dc supply going to the 5V regulator. The rubber
sheet acts as a good vibration isolator as well as a airtight
seal. Just make sure that the cf/m rating is high enough.
--
Dave McGuire, AK4HZ
New Kensington, PA
------------------------------------
Posted by: Peter Gottlieb <hpnpilot@...>
------------------------------------
------------------------------------
Yahoo Groups Links
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
---------------------------------------------------------------------------
|
Re: 8568B fan replacement
Last job I was a part of there was a 30 yard dumpster full of scraps. Be careful what you ask for! I saved about 20 pounds of the stuff in good sized pieces, probably a lifetime supply.
toggle quoted message
Show quoted text
On 7/2/2017 11:34 AM, Dave McGuire Mcguire@... [hp_agilent_equipment] wrote:
I am three days away from starting a re-roofing project on a large
commercial building. We're putting a rubber roof up there. I will ask
the roofers to save the scraps for me; I'll set them aside in case
anyone needs them. I expect that they'll be at that stage in about a week.
-Dave
On 07/02/2017 10:23 AM, Peter Gottlieb hpnpilot@...
[hp_agilent_equipment] wrote:
Interesting idea. Commercial roofs are made with rubber sheet and any
friendly roofer will gladly give you as much as you care to carry off
from the trimmings.
Peter
On Jul 2, 2017, at 9:57 AM, Jeremy Nichols jn6wfo@...
<mailto:jn6wfo@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
That's a good idea, Chris. Another source of rubber sheeting is the
stuff people buy to line backyard water features. A dealer might sell
you a scrap of a few feet for almost nothing.
Jeremy
On Sun, Jul 2, 2017 at 1:40 AM chris.hayes60@...
<mailto:chris.hayes60@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
__
I find fan noise annoying, so I replace 5" fans with quiet 3" or
4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner
tube). Most equipment has a convenient supply. I've even run a 12V
fan from the raw dc supply going to the 5V regulator. The rubber
sheet acts as a good vibration isolator as well as a airtight
seal. Just make sure that the cf/m rating is high enough.
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Re: 8568B fan replacement
I am three days away from starting a re-roofing project on a large commercial building. We're putting a rubber roof up there. I will ask the roofers to save the scraps for me; I'll set them aside in case anyone needs them. I expect that they'll be at that stage in about a week. -Dave On 07/02/2017 10:23 AM, Peter Gottlieb hpnpilot@... [hp_agilent_equipment] wrote: Interesting idea. Commercial roofs are made with rubber sheet and any
friendly roofer will gladly give you as much as you care to carry off
from the trimmings.
Peter
On Jul 2, 2017, at 9:57 AM, Jeremy Nichols jn6wfo@...
<mailto:jn6wfo@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
That's a good idea, Chris. Another source of rubber sheeting is the
stuff people buy to line backyard water features. A dealer might sell
you a scrap of a few feet for almost nothing.
Jeremy
On Sun, Jul 2, 2017 at 1:40 AM chris.hayes60@...
<mailto:chris.hayes60@...> [hp_agilent_equipment]
<hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>> wrote:
__
I find fan noise annoying, so I replace 5" fans with quiet 3" or
4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner
tube). Most equipment has a convenient supply. I've even run a 12V
fan from the raw dc supply going to the 5V regulator. The rubber
sheet acts as a good vibration isolator as well as a airtight
seal. Just make sure that the cf/m rating is high enough.
-- Dave McGuire, AK4HZ New Kensington, PA
|
Re: 8568B fan replacement
Interesting idea. Commercial roofs are made with rubber sheet and any friendly roofer will gladly give you as much as you care to carry off from the trimmings.?
Peter
toggle quoted message
Show quoted text
?
That's a good idea, Chris. Another source of rubber sheeting is the stuff people buy to line backyard water features. A dealer might sell you a scrap of a few feet for almost nothing.?
Jeremy?
?
I find fan noise annoying, so I replace 5" fans with quiet 3" or 4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner tube). Most equipment has a convenient supply. I've even run a 12V fan from the raw dc supply going to the 5V regulator. The rubber sheet acts as a good vibration isolator as well as a airtight seal. Just make sure that the cf/m rating is high enough.
--
4.
|
Re: 8590a passes CAL, fails CONF
A GOOGLE of the series indicates others replaced the battery. Antique Radios forum from 2012.
Dennis
--------------------------------------------
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Show quoted text
On Sun, 7/2/17, ckuni@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: [hp_agilent_equipment] 8590a passes CAL, fails CONF
To: hp_agilent_equipment@...
Date: Sunday, July 2, 2017, 1:40 AM
Hello all--first posting.?
When my 8590a powers up, the screen shows many moving spikes
that extend the entire vertical height of the screen, as if
sensitivity is extremely high and the spikes represent
noise.? If I do CAL->CORRECT->OFF, the screen
shows the expected spectrum with the internal 299.9Hz
calibration signal connected to the input.? It passes
both frequency and amplitude CAL tests but fails the
confidence test on, as far as I can see, every one of the
many steps.? If I attempt to store and later fetch the
CAL data, I get the moving spikes; as before, turning off
CORRECT causes the analyzer to act normally, although I
haven't carefully checked amplitude and frequency
accuracy of the display under this uncorrected condition.
I've searched this forum and elsewhere and have come up
dry.? Any ideas?
Thanks,
Christopher Kuni
|
Re: 8568B fan replacement
That's a good idea, Chris. Another source of rubber sheeting is the stuff people buy to line backyard water features. A dealer might sell you a scrap of a few feet for almost nothing.?
Jeremy?
?
I find fan noise annoying, so I replace 5" fans with quiet 3" or 4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner tube). Most equipment has a convenient supply. I've even run a 12V fan from the raw dc supply going to the 5V regulator. The rubber sheet acts as a good vibration isolator as well as a airtight seal. Just make sure that the cf/m rating is high enough.
|
Re: Question about side handle for a 140B scope
The link worked for me, but I am State Side.
Dennis
--------------------------------------------
toggle quoted message
Show quoted text
On Sun, 7/2/17, Barry n4buq@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: Re: [hp_agilent_equipment] Question about side handle for a 140B scope
To: "hp agilent equipment" <hp_agilent_equipment@...>
Date: Sunday, July 2, 2017, 7:39 AM
Hi Paul,
If I click on it, it displays the image in
Google Drive.? That was supposed to be a sharable link to
that image.? I wonder if anyone else was able to view
it?
Thanks,
Barry - N4BUQ
----- Original Message -----
> From: "'Paul Bicknell' paul@...
[hp_agilent_equipment]" <hp_agilent_equipment@...>
> To: "hp agilent equipment"
<hp_agilent_equipment@...>
> Sent: Sunday, July 2, 2017 3:54:31 AM
> Subject: RE: [hp_agilent_equipment]
Question about side handle for a 140B scope
>
> Hi Barry
>
> The link
>
>
> dues not work for me
>
Paul B
>
>?
_____
>
> From: hp_agilent_equipment@...
> [mailto:hp_agilent_equipment@...]
> Sent: 30 June 2017 15:57
> To: hp agilent equipment
> Subject: [hp_agilent_equipment] Question
about side handle for a 140B scope
>
>?
>
>?
>
> The side handle holes on my 140B have a
plate installed that looks like
>
this:
>
>
>
> Can someone tell me
what that plate's intended purpose is? I think the
> standard side handles that went with that
scope had a plate similar to the
> ones
for gear like an 8640B, etc.; however, the plates from an
8640B don't
> fit this hole (the
handles may be the same but the plates are different).
>
> Are the plates shown
in the picture for some kind of bail or other stand in
> lieu of a handle?
>
> Thanks,
> Barry -
N4BUQ
>
>
>
> No virus found in
this message.
> Checked by AVG -
www.avg.com <>
>
Version: 2016.0.8013 / Virus Database: 4779/14623 - Release
Date: 06/29/17
>
>
------------------------------------
Posted by: Barry <n4buq@...>
------------------------------------
------------------------------------
Yahoo Groups Links
Traditional
? ? (Yahoo! ID required)
? ? hp_agilent_equipment-fullfeatured@...
|
Re: HP 70206A switch cable needed.
Paul,
I am State Side, Ohio.
Dennis
--------------------------------------------
toggle quoted message
Show quoted text
On Sun, 7/2/17, 'Paul Bicknell' paul@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: RE: [hp_agilent_equipment] HP 70206A switch cable needed.
To: hp_agilent_equipment@...
Date: Sunday, July 2, 2017, 5:00 AM
Re
the 70206A
I
assume you are not in the UK ? as I could
find a home for one
Paul
B
From:
hp_agilent_equipment@...
[mailto: hp_agilent_equipment@... ]
Sent: 29 June
2017 21:17
To:
hp_agilent_equipment@...
Subject:
[hp_agilent_equipment] HP
70206A switch cable needed.
?
?
If anyone
has a switch actuator cable, please contact me off list.
I finally opened the display to see why it always stayed on,
surprise,
no cable. I have no need for this display if anyone is
interested before
it hits ebay.
HEWLETT PACKARD 70206A SYSTEM GRAPHICS DISPLAY
Part Number:??? ??? 3131-0492???
Part Description:??? CABLE, SWITCH ACTUATOR???
Item Status:??? ??? Obsolete???
Item Type:??? ??? ? ? ? ?
Keysight Qualified Part
Products using part??? ??? 3131-0492
71100C, 71200C, 71209A, 71210C, 71400C, 71401C, 71910A
Dennis
No virus found in this
message.
Checked by AVG - www.avg.com
Version: 2016.0.8013 / Virus Database: 4779/14620 - Release
Date: 06/28/17
|
Re: Question about side handle for a 140B scope
On 07/02/2017 07:39 AM, Barry n4buq@... [hp_agilent_equipment] wrote: Hi Paul,
If I click on it, it displays the image in Google Drive. That was supposed to be a sharable link to that image. I wonder if anyone else was able to view it?
Thanks,
Barry - N4BUQ Works fine for me too. Mark
|
Re: We could use a wiki for HP test equipment
Dr. David Kirkby (Kirkby Microwave Ltd)
|
Re: Question about side handle for a 140B scope
Hi Paul,
If I click on it, it displays the image in Google Drive. That was supposed to be a sharable link to that image. I wonder if anyone else was able to view it?
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "'Paul Bicknell' paul@... [hp_agilent_equipment]" <hp_agilent_equipment@...>
To: "hp agilent equipment" <hp_agilent_equipment@...>
Sent: Sunday, July 2, 2017 3:54:31 AM
Subject: RE: [hp_agilent_equipment] Question about side handle for a 140B scope
Hi Barry
The link
dues not work for me
Paul B
_____
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: 30 June 2017 15:57
To: hp agilent equipment
Subject: [hp_agilent_equipment] Question about side handle for a 140B scope
The side handle holes on my 140B have a plate installed that looks like
this:
Can someone tell me what that plate's intended purpose is? I think the
standard side handles that went with that scope had a plate similar to the
ones for gear like an 8640B, etc.; however, the plates from an 8640B don't
fit this hole (the handles may be the same but the plates are different).
Are the plates shown in the picture for some kind of bail or other stand in
lieu of a handle?
Thanks,
Barry - N4BUQ
No virus found in this message.
Checked by AVG - www.avg.com <>
Version: 2016.0.8013 / Virus Database: 4779/14623 - Release Date: 06/29/17
|
Re: HP 70206A switch cable needed.
Re the 70206A
I assume you are not in the UK? as I could
find a home for one
Paul B
From:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: 29 June 2017 21:17
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP
70206A switch cable needed.
?
?
If anyone
has a switch actuator cable, please contact me off list.
I finally opened the display to see why it always stayed on, surprise,
no cable. I have no need for this display if anyone is interested before
it hits ebay.
HEWLETT PACKARD 70206A SYSTEM GRAPHICS DISPLAY
Part Number:??? ??? 3131-0492???
Part Description:??? CABLE, SWITCH ACTUATOR???
Item Status:??? ??? Obsolete???
Item Type:??? ??? ? ? ? ?
Keysight Qualified Part
Products using part??? ??? 3131-0492
71100C, 71200C, 71209A, 71210C, 71400C, 71401C, 71910A
Dennis
No virus found in this message.
Checked by AVG -
Version: 2016.0.8013 / Virus Database: 4779/14620 - Release Date: 06/28/17
|
Re: Question about side handle for a 140B scope
Hi Barry
The link
https://drive.google.com/open?id=0B2VPoDbeC5jfclQ5X0pzVU80Tmc
dues not work for me
Paul B
From:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sent: 30 June 2017 15:57
To: hp agilent equipment
Subject: [hp_agilent_equipment]
Question about side handle for a 140B scope
?
?
The side handle holes on my 140B have a plate
installed that looks like this:
https://drive.google.com/open?id=0B2VPoDbeC5jfclQ5X0pzVU80Tmc
Can someone tell me what that plate's intended purpose is? I think the standard
side handles that went with that scope had a plate similar to the ones for gear
like an 8640B, etc.; however, the plates from an 8640B don't fit this hole (the
handles may be the same but the plates are different).
Are the plates shown in the picture for some kind of bail or other stand in
lieu of a handle?
Thanks,
Barry - N4BUQ
No virus found in this message.
Checked by AVG -
Version: 2016.0.8013 / Virus Database: 4779/14623 - Release Date: 06/29/17
|
Re: 8568B fan replacement
I find fan noise annoying, so I replace 5" fans with quiet 3" or 4" 12 Vdc fans mounted in a flat sheet of rubber (like car inner tube). Most equipment has a convenient supply. I've even run a 12V fan from the raw dc supply going to the 5V regulator. The rubber sheet acts as a good vibration isolator as well as a airtight seal. Just make sure that the cf/m rating is high enough.
|
Re: 8590a passes CAL, fails CONF
Christopher,
K04bb.com has (hand drawn) schematics for the 8593a power supply. ?I'm not sure if the 8590a supply is similar.
--John Gord ---In hp_agilent_equipment@..., <tmiller11147@...> wrote : ? If I had to take a guess, I would take a look at the power
supply rails. Check the levels and look for ripple with a scope.?This unit
uses a switching power supply and there is a real good chance you have a bad
filter capacitor on one or more?of the low voltage supplies. Pull the
supply out and look at the output filter caps to see if any are bulging or
leaking. ? As far as I know, there are no schematics of the supply as it
was sourced outside of HP. I have seen replacement supplies (that require slight
modification) sometimes on ebay or other sources. Maybe you will get lucky and
just need to replace a few caps. ? Regards, Tom ? ? ?
----- Original Message ----- Sent: Sunday, July 02, 2017 1:40 AM Subject: [hp_agilent_equipment] 8590a
passes CAL, fails CONF
?Hello all--first posting.?
When my 8590a powers up, the screen
shows many moving spikes that extend the entire vertical height of the screen,
as if sensitivity is extremely high and the spikes represent noise.? If I
do CAL->CORRECT->OFF, the screen shows the expected spectrum with the
internal 299.9Hz calibration signal connected to the input.? It passes
both frequency and amplitude CAL tests but fails the confidence test on, as
far as I can see, every one of the many steps.? If I attempt to store and
later fetch the CAL data, I get the moving spikes; as before, turning off
CORRECT causes the analyzer to act normally, although I haven't carefully
checked amplitude and frequency accuracy of the display under this uncorrected
condition.
I've searched this forum and elsewhere and have come up
dry.? Any ideas?
Thanks,
Christopher Kuni?
|
Re: 8590a passes CAL, fails CONF
?
If I had to take a guess, I would take a look at the power
supply rails. Check the levels and look for ripple with a scope.?This unit
uses a switching power supply and there is a real good chance you have a bad
filter capacitor on one or more?of the low voltage supplies. Pull the
supply out and look at the output filter caps to see if any are bulging or
leaking.
?
As far as I know, there are no schematics of the supply as it
was sourced outside of HP. I have seen replacement supplies (that require slight
modification) sometimes on ebay or other sources. Maybe you will get lucky and
just need to replace a few caps.
?
Regards,
Tom
?
?
?
----- Original Message -----
Sent: Sunday, July 02, 2017 1:40 AM
Subject: [hp_agilent_equipment] 8590a
passes CAL, fails CONF
?
Hello all--first posting.?
When my 8590a powers up, the screen
shows many moving spikes that extend the entire vertical height of the screen,
as if sensitivity is extremely high and the spikes represent noise.? If I
do CAL->CORRECT->OFF, the screen shows the expected spectrum with the
internal 299.9Hz calibration signal connected to the input.? It passes
both frequency and amplitude CAL tests but fails the confidence test on, as
far as I can see, every one of the many steps.? If I attempt to store and
later fetch the CAL data, I get the moving spikes; as before, turning off
CORRECT causes the analyzer to act normally, although I haven't carefully
checked amplitude and frequency accuracy of the display under this uncorrected
condition.
I've searched this forum and elsewhere and have come up
dry.? Any ideas?
Thanks,
Christopher Kuni?
|
8590a passes CAL, fails CONF
Hello all--first posting.?
When my 8590a powers up, the screen shows many moving spikes that extend the entire vertical height of the screen, as if sensitivity is extremely high and the spikes represent noise.? If I do CAL->CORRECT->OFF, the screen shows the expected spectrum with the internal 299.9Hz calibration signal connected to the input.? It passes both frequency and amplitude CAL tests but fails the confidence test on, as far as I can see, every one of the many steps.? If I attempt to store and later fetch the CAL data, I get the moving spikes; as before, turning off CORRECT causes the analyzer to act normally, although I haven't carefully checked amplitude and frequency accuracy of the display under this uncorrected condition.
I've searched this forum and elsewhere and have come up dry.? Any ideas?
Thanks,
Christopher Kuni?
|
I was recently gifted a 8568B (missing interconnect cables unfortunately, so if anyone has a surplus set let me know as I'd like to run this on another bench from my 8566B which has cables).
The RF section has a tag marked with "damaged fan."
The markings on the fan are very faded and unreadable. It is an IMC Boxer fan which, even after I oiled it, will not run properly. It's an odd one, the shroud is part of the instrument and the fan is a "spider" mount with motor and blades. The spider arms are mounted to rubber vibration isolators, two of which are broken. The others are close to failing.
Has anyone found a replacement? I'd prefer a new fan and isolators but perhaps someone has had luck with something standard as a replacement and willing to share their findings? It's a 115 VAC 50/60 Hz motor.
Internally it's a little dusty but otherwise looks pretty good.
Peter
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Dave McGuire
Jeremy Nichols
Paul Bicknell