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FS: GPIB cables, TM5006 RackMount, Tektronix K420 cart

Howard Ashcraft
 

I have been consolidating the shop and have the following available.


GPIB Cables (all were installed and working until I disassembled a rack
today.

(1) HP9220R 12" GPIB $7.50
(2) HP108331 48" GPIB $12.00, each

TM5006 Rack Mount $45.00 (I was using this unit until 1 week ago, when I
sold the modules in the rack)

Tektronix K420 equipment cart with straps $75

All prices are based on pickup in Alameda, California. Shipping at cost
(including packing, if required). K420 will not be shipped and is only
available for pick-up.

email me off list if you want any of these items.
545xx scope fails time null cal

Alexander Whiplash
 

I was running through the cal procedure for a 54522A and it completes everything with a pass except for the time null cal on "chan 1 & ext" with a code of 0000 0000 0001 0001. Does anyone know what this code means, or if this is something that is practical repair ? I posted a similar inquiry on the Agilent scope forum but so far no comments. Thanks for any tips.

AW
Re: HP 3575A

snurfl
 

--- In hp_agilent_equipment@..., "m8jpk" <ttesenq@...> wrote:

Hello Folks
I am trying to Source the following HP Parts
Any Advice or Offers most appreciated.
1826-0195
1820-1252
1820-0944
Thanks M8JPK

The 1820-0944 is a CD4025
The 1820-1252 is a LD110CJ
The 1826-0195 is a LD111CJ

The CD4025 is easy enough to find; but the LD110 and LD111 are going to be really, really hard to find. They weren't in production all that long, and were hard to find even while the were being produced. Best bet on those two is to find a donor multimeter somewhere and salvage them.

Cheers!!
Dave M
HP 3575A

 

Hello Folks
I am trying to Source the following HP Parts
Any Advice or Offers most appreciated.
1826-0195
1820-1252
1820-0944
Thanks M8JPK
Re: HP-182C repair

 

Hi all,

just an update, I found an open resistor on the gate amplifier board,
A7R28, it's in the path to the control grid.
After replacing it I have a spot, rather large and almost can't be
focused correctly.
Now intensity kind of works, but moves the spot with varying intensity.
Also horizontal position works, but the spot moves on a curved path
and focusing varies through the path.
The more I think about it the more I suspect a bad CRT.
As always any hint is welcome.

best regards
Frank

On 9/26/09, francesco messineo <francesco.messineo@...> wrote:
Hi Ken,

thanks for the answer, my findings after your test follow

On 9/26/09, ken chalfant <kpchalfant@...> wrote:
Greetings Frank,

Please advise as to the plug-ins you have in the main frame.
for now, no plugins installed, until at least I can see something on
the CRT. The other mainframe shows a spot even with no plugins if I
set to ext display.


I can't remember for certain - the 182C is not storage - correct?
right, it's not storage.


What happens when you depress the "BEAM FINDER"?
nothing happens.


What happens when you depress the "BEAM FINDER" and move both the X and Y
position knobs?
nothing seen, with no plugins I have only the horizontal knob anyway.


Please turn the intensity up to very bright - just once - and power the
unit
OFF. Does the off screen dot move toward the center of the CRT before it
fades away?
no, and probably it's not an off screen dot since I can see it only
when turning the scale illumination knob, not the intensity.
However if I have the intensity up and I power on the mainframe I see
a fast spot moving and disappearing in less than one second.
Maybe a problem on the intensity circuitry?


Let's see if we can figure out why it does not want to behave.
I hope so :-)


Warm regards,
thanks a lot and best regards

Frank

Ken

----- Original Message -----
From: francesco messineo<mailto:francesco.messineo@...>
To: hp_agilent_equipment<mailto:hp_agilent_equipment@...>
Sent: Friday, September 25, 2009 2:55 PM
Subject: [hp_agilent_equipment] HP-182C repair


Hello all,

I'm trying to revive a 182C oscilloscope. I have the service manual,
but it's for a different serial group. I think it should be enough
close anyway.
So far I've checked and set all low voltages and the cathode voltage.
Then I tried to set the intensity limit but there's no visible spot on
the CRT (I checked on another working 182T and with the same controls
set there's a spot and can be moved with horizontal position).
It seems there's a spot just off screen around the lower right corner
of the CRT, however it doesn't move with horizontal control.
I checked the control grid and focus voltages and they seem to be ok,
also the grid voltage changes with the intensity limit trimmer.
On the first two times I powered the scope I heard crackling sounds
and seen some "lightning-like" tracks on the CRT, the next times it
didn't make any sound or firework on the screen.
Now I think I should start to troubleshoot vertical and horizontal
drivers, but the cracks and fireworks made me wonder about the CRT,
can it be damaged?
Please don't suggest me to swap the CRT with the working unit, I just
tried to remove the connections on the neck but they seem stuck and
I'm afraid I can damage the glass.
I'm seeking for hints and advices, if the CRT is likely damaged I'm
going to sell the old thing for spares and not spend more time with
it.

Thanks in advance and best regards

Frank IZ8DWF
Re: HP-182C repair

 

Hi Ken,

thanks for the answer, my findings after your test follow

On 9/26/09, ken chalfant <kpchalfant@...> wrote:
Greetings Frank,

Please advise as to the plug-ins you have in the main frame.
for now, no plugins installed, until at least I can see something on
the CRT. The other mainframe shows a spot even with no plugins if I
set to ext display.


I can't remember for certain - the 182C is not storage - correct?
right, it's not storage.


What happens when you depress the "BEAM FINDER"?
nothing happens.


What happens when you depress the "BEAM FINDER" and move both the X and Y
position knobs?
nothing seen, with no plugins I have only the horizontal knob anyway.


Please turn the intensity up to very bright - just once - and power the unit
OFF. Does the off screen dot move toward the center of the CRT before it
fades away?
no, and probably it's not an off screen dot since I can see it only
when turning the scale illumination knob, not the intensity.
However if I have the intensity up and I power on the mainframe I see
a fast spot moving and disappearing in less than one second.
Maybe a problem on the intensity circuitry?


Let's see if we can figure out why it does not want to behave.
I hope so :-)


Warm regards,
thanks a lot and best regards

Frank

Ken

----- Original Message -----
From: francesco messineo<mailto:francesco.messineo@...>
To: hp_agilent_equipment<mailto:hp_agilent_equipment@...>
Sent: Friday, September 25, 2009 2:55 PM
Subject: [hp_agilent_equipment] HP-182C repair


Hello all,

I'm trying to revive a 182C oscilloscope. I have the service manual,
but it's for a different serial group. I think it should be enough
close anyway.
So far I've checked and set all low voltages and the cathode voltage.
Then I tried to set the intensity limit but there's no visible spot on
the CRT (I checked on another working 182T and with the same controls
set there's a spot and can be moved with horizontal position).
It seems there's a spot just off screen around the lower right corner
of the CRT, however it doesn't move with horizontal control.
I checked the control grid and focus voltages and they seem to be ok,
also the grid voltage changes with the intensity limit trimmer.
On the first two times I powered the scope I heard crackling sounds
and seen some "lightning-like" tracks on the CRT, the next times it
didn't make any sound or firework on the screen.
Now I think I should start to troubleshoot vertical and horizontal
drivers, but the cracks and fireworks made me wonder about the CRT,
can it be damaged?
Please don't suggest me to swap the CRT with the working unit, I just
tried to remove the connections on the neck but they seem stuck and
I'm afraid I can damage the glass.
I'm seeking for hints and advices, if the CRT is likely damaged I'm
going to sell the old thing for spares and not spend more time with
it.

Thanks in advance and best regards

Frank IZ8DWF
Re: HP-182C repair

 

Greetings Frank,

Please advise as to the plug-ins you have in the main frame.

I can't remember for certain - the 182C is not storage - correct?

What happens when you depress the "BEAM FINDER"?

What happens when you depress the "BEAM FINDER" and move both the X and Y position knobs?

Please turn the intensity up to very bright - just once - and power the unit OFF. Does the off screen dot move toward the center of the CRT before it fades away?

Let's see if we can figure out why it does not want to behave.

Warm regards,

Ken

----- Original Message -----
From: francesco messineo<mailto:francesco.messineo@...>
To: hp_agilent_equipment<mailto:hp_agilent_equipment@...>
Sent: Friday, September 25, 2009 2:55 PM
Subject: [hp_agilent_equipment] HP-182C repair


Hello all,

I'm trying to revive a 182C oscilloscope. I have the service manual,
but it's for a different serial group. I think it should be enough
close anyway.
So far I've checked and set all low voltages and the cathode voltage.
Then I tried to set the intensity limit but there's no visible spot on
the CRT (I checked on another working 182T and with the same controls
set there's a spot and can be moved with horizontal position).
It seems there's a spot just off screen around the lower right corner
of the CRT, however it doesn't move with horizontal control.
I checked the control grid and focus voltages and they seem to be ok,
also the grid voltage changes with the intensity limit trimmer.
On the first two times I powered the scope I heard crackling sounds
and seen some "lightning-like" tracks on the CRT, the next times it
didn't make any sound or firework on the screen.
Now I think I should start to troubleshoot vertical and horizontal
drivers, but the cracks and fireworks made me wonder about the CRT,
can it be damaged?
Please don't suggest me to swap the CRT with the working unit, I just
tried to remove the connections on the neck but they seem stuck and
I'm afraid I can damage the glass.
I'm seeking for hints and advices, if the CRT is likely damaged I'm
going to sell the old thing for spares and not spend more time with
it.

Thanks in advance and best regards

Frank IZ8DWF
Re: Agilent E4420 series Sig Gen

 

Hello Paul,

Thanks for the reply....am looking at a 4420B, I know it only goes to 2Ghz; I wonder if also supports the the functions you mention....I guess it may depend on installed options....Got any idea about fair or going prices?

Thanks Again,
Steve

----- Original Message -----
From: Paul Read
To: 'hp_agilent_equipment@...'
Sent: Friday, September 25, 2009 8:45 AM
Subject: [hp_agilent_equipment] Re:Agilent E4420 series Sig Gen


Hi Steve,

I currently have an E4422b on my bench, and have found it to be very good. The unit I have has various modulation sources including a function generator, and the performance of that is excellent , I would certainly make room for one on my bench at home. It would replace at least 2 boxes there, so the XYL would be pleases :o)
The unit also includes sweeps of frequency and power.
Yum !

73
Paul
Re: Part needed for a HP 6227B Dual Power Supply

 

Tom,
Isn't it just a regular switch you can by from Mouser or Digikey? I have a 6228B that's similar, but I'll admit I haven't opened it up to look at the switches, though I probably should clean them. On a personal note, I hate slide switches.

Erich

--- In hp_agilent_equipment@..., "Tom Miller" <tmiller@...> wrote:

Greetings,

Does anyone have a parts hanger queen that can supply a switch. It is the
Volts/Amps slide switch, part number 3101-1288, a 3-pole - double throw
slide switch.

With fingers crossed,
Tom

[Non-text portions of this message have been removed]
FS: HP PCB assemblies

 

Hewlett Packard 427A -- Complete insides less meter: Two PCB's, Range & Attenuator Switch assemblies, etc, mounted to metal framework -- $20

Hewlett Packard PCB Assemblies -- $10 each

00745-66512
00745-66513
00745-66514
00745-66515
00745-66516
00745-66517
00745-66518
00745-66519
00745-66541
00745-66543
00745-66544
00745-66551
00745-66552
00745-66553
00745-66555
00745-66556
00745-66557
00745-66558

05326-20008 (less readouts)
05326-60002
05326-60003
05326-60004
05326-60005
05326-60009
05326-60013

05327-60002
05327-60003
05327-60004
05327-60009

69330-60021



More test equipment is available on my webpage:






Also Test Equipment Manuals & some others at:





Contact: Marv WC6W 310 649 3111 (reasonable hours
Pacific Time please)
HP-182C repair

 

Hello all,

I'm trying to revive a 182C oscilloscope. I have the service manual,
but it's for a different serial group. I think it should be enough
close anyway.
So far I've checked and set all low voltages and the cathode voltage.
Then I tried to set the intensity limit but there's no visible spot on
the CRT (I checked on another working 182T and with the same controls
set there's a spot and can be moved with horizontal position).
It seems there's a spot just off screen around the lower right corner
of the CRT, however it doesn't move with horizontal control.
I checked the control grid and focus voltages and they seem to be ok,
also the grid voltage changes with the intensity limit trimmer.
On the first two times I powered the scope I heard crackling sounds
and seen some "lightning-like" tracks on the CRT, the next times it
didn't make any sound or firework on the screen.
Now I think I should start to troubleshoot vertical and horizontal
drivers, but the cracks and fireworks made me wonder about the CRT,
can it be damaged?
Please don't suggest me to swap the CRT with the working unit, I just
tried to remove the connections on the neck but they seem stuck and
I'm afraid I can damage the glass.
I'm seeking for hints and advices, if the CRT is likely damaged I'm
going to sell the old thing for spares and not spend more time with
it.

Thanks in advance and best regards

Frank IZ8DWF
Re: hp3561 info.

John Miles
 

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]On Behalf Of Pete Rawson
Sent: Friday, September 25, 2009 10:45 AM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] hp3561 info.


John,

Thanks for the comparative data, Since you've obviously researched
this stuff; how do the noise floors compare?
It's hard to say because the HP has a AGC loop that constantly adjusts the
front end gain to maximize dynamic range. The floor's between -140 and -150
dBV/root-Hz according to the HPJ issue, which over a 100-kHz input bandwidth
would raise the floor by about 50 dBV.

With a sound card, full-scale recordings made with a line-level input
correspond to about -10 dBV, but an SFDR of better than 100 dB is common
even at full bandwidth. So, while the sound card can put a larger amplitude
range on the screen, the floors are likely to be pretty similar as far as I
can tell (I've never pitted them directly against each other).

Dynamic range in FFT analysis is important in ways you might not realize
immediately. For instance, when you use a 3561A to measure phase noise,
you've got to use a series of switchable high-pass filters to keep the 1/f^n
regions near the carrier from swamping the floor at higher offsets. You
can't just hook it up to a downconverter and call it a day, or use a single
HPF at an arbitrary offset like 10 Hz. ADCs with higher dynamic range make
life easier.

-- john, KE5FX
Re: hp3561 info.

Pete Rawson
 

John,

Thanks for the comparative data, Since you've obviously researched
this stuff; how do the noise floors compare?

Pete Rawson
Re: hp3561 info.

John Miles
 

-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]On Behalf Of Luis Cupido
Sent: Friday, September 25, 2009 10:25 AM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] hp3561 info.


Tks John,

Is there another HP model you would recommend
as something really interesting instead of the 3561 ?
(radio ham pocket, ebay etc)

Yes below 10Hz is of interest :-(
If you have the bench/rack space, you might consider the 3562A or 3563A,
which have similar bandwidth and ADC limits as the 3561A but give you two
channels and some nifty firmware features. Otherwise I'd have to know
something about your application. If you can use an I/Q multiplier of some
sort to upconvert whatever you're measuring to a frequency within a stereo
sound card's usable bandwidth, then the sub-10 Hz limitation may not be a
deal-killer. (Plus, I believe some of the higher-quality sound cards do
have DC coupling options these days.)

I don't think HP built any FFT analyzers that went beyond 100 kHz that are
affordable on the used market now. Could be wrong about that, though.

-- john, KE5FX
Re: hp3561 info.

Luis Cupido
 

Tks John,

Is there another HP model you would recommend
as something really interesting instead of the 3561 ?
(radio ham pocket, ebay etc)

Yes below 10Hz is of interest :-(

Luis Cupido.


John Miles wrote:

Anyone familiar with the hp3561 can tell me
two basic things:

-Is the technology inside a lot based on asics or
traditional digital stuff?
A combination of both. The December 1984 HP Journal has a good collection
of articles on its design. Some of them even had 1-Mb bubble memories.

-Is the performance interesting or a good sound card + PC
is nowadays better ?
Sound cards can be much better performers if you don't need sub-1 Hz
response (most aren't DC-coupled) or the missing Nyquist headroom afforded
by the 3561A's higher sampling rate (256 ksps versus 192 ksps max for most
sound cards.) The 3561A's 13-bit dynamic range, single input channel, and
limited record length are its Achilles' heels.
The real difference is in software support. You can do a lot of useful DSP
analysis work with sound cards that would be impractical with a 3561A.
3561As are unusually well-designed and packaged, so they will always appeal
to the compulsive collector. :) But for the most part, you would only *use*
one if you needed to run legacy applications like the 3048A package.
-- john, KE5FX
------------------------------------
Yahoo! Groups Links
Re: hp3561 info.

John Miles
 

Anyone familiar with the hp3561 can tell me
two basic things:

-Is the technology inside a lot based on asics or
traditional digital stuff?
A combination of both. The December 1984 HP Journal has a good collection
of articles on its design. Some of them even had 1-Mb bubble memories.

-Is the performance interesting or a good sound card + PC
is nowadays better ?
Sound cards can be much better performers if you don't need sub-1 Hz
response (most aren't DC-coupled) or the missing Nyquist headroom afforded
by the 3561A's higher sampling rate (256 ksps versus 192 ksps max for most
sound cards.) The 3561A's 13-bit dynamic range, single input channel, and
limited record length are its Achilles' heels.

The real difference is in software support. You can do a lot of useful DSP
analysis work with sound cards that would be impractical with a 3561A.

3561As are unusually well-designed and packaged, so they will always appeal
to the compulsive collector. :) But for the most part, you would only *use*
one if you needed to run legacy applications like the 3048A package.

-- john, KE5FX
hp3561 info.

Luis Cupido
 

Hi,

Anyone familiar with the hp3561 can tell me
two basic things:

-Is the technology inside a lot based on asics or
traditional digital stuff?
-Is the performance interesting or a good sound card + PC
is nowadays better ?

Thanks.

Luis Cupido.
ct1dmk.
Re: 332A balance pots

 

I should clarify - I mean only to break the seal so I can open the pots, thoroughly clean everything out and then close them again. I would not do any cutting without then stripping the pot!
Re: HP8559A mainboard issue

 

Dear Mattc:
?
Not so simple !
?
It is the defective in mainboard !
?
I have one working unit and a defective unit , I find the mainboard problem , just exchange ALL boards.
?
Regard
Tony Cheung
SEP 25 2009

--- On Fri, 9/25/09, mattc <rmc321@...> wrote:


From: mattc <rmc321@...>
Subject: [hp_agilent_equipment] Re: HP8559A mainboard issue
To: hp_agilent_equipment@...
Date: Friday, September 25, 2009, 10:24 AM


?



Hi Tony,
I'm not too familiar with this instrument, but doesn't the front panel of the 8559A have a Frequency Calibrator button to correct the errors between the displayed and actual frequencies?
Matt
--- In hp_agilent_equipmen t@yahoogroups. com, "tonycheung_ hk" <tonycheung_ hk@...> wrote:

Dear members:

Anyone had experience to repair the MAIN Board of HP8559A ?

Problem is displaied signal lower than actually value.


Regard
Tony Cheung
SEP 25 2009


















[Non-text portions of this message have been removed]
Re: Agilent E4420 series Sig Gen

Paul Read
 

Hi Steve,

I currently have an E4422b on my bench, and have found it to be very good. The unit I have has various modulation sources including a function generator, and the performance of that is excellent , I would certainly make room for one on my bench at home. It would replace at least 2 boxes there, so the XYL would be pleases :o)
The unit also includes sweeps of frequency and power.
Yum !

73
Paul
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