Re: A Source for Tools Etc
If you wander over the the beadwork section of Michaels, you'll find
inexpensive ( $2.00) 17 compartment plastic storage boxes, made by
Darcy. Quite useful for hardware and parts storage.
They also have smaller hinged lid boxes, color coded by number of
compartments and the 5 and 6 compartment versions (think that's the
correct number) are ideal for BNC and N attenuator storage, one per
compartment.
Jack K8ZOA
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On 1/19/2013 5:47 PM, J. Forster wrote:
This afternoon, I was in the crafts store Michaels and browsed the section
for metal jewelery making. They actually have a very nice selection of
various kinds of fine pliers, including needle and round nose, and various
cutters. For things needing 'a bit of adjustment' they also had a fairly
good collection of small hammers.
Prices were not cheap ($10 - $20) but today, there are few places where
you can get a good look at tools before buying. Certainly, they have a far
better selection than Sears or most chain hardware stores.
They also had some nice, small, thin metal sheets.
YMMV,
-John
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Re: [TestEquipTrader] A Source for Tools Etc
Hobby Lobby carries a similar stock.
Also, since most of it comes from China anyhow, Harbor Freight carries
many small tools.
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This afternoon, I was in the crafts store Michaels and browsed the section
for metal jewelery making. They actually have a very nice selection of
various kinds of fine pliers, including needle and round nose, and various
cutters. For things needing 'a bit of adjustment' they also had a fairly
good collection of small hammers.
Prices were not cheap ($10 - $20) but today, there are few places where
you can get a good look at tools before buying. Certainly, they have a far
better selection than Sears or most chain hardware stores.
They also had some nice, small, thin metal sheets.
YMMV,
-John
--
Thanks! & 73, KD4E.com
David Colburn nevils-station.com
I don't google I SEARCH! duckduckgo.com
Network: groups.yahoo.com/group/qrv
Restored to design-spec at Heaven's gate 1Cor15:22
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This afternoon, I was in the crafts store Michaels and browsed the section
for metal jewelery making. They actually have a very nice selection of
various kinds of fine pliers, including needle and round nose, and various
cutters. For things needing 'a bit of adjustment' they also had a fairly
good collection of small hammers.
Prices were not cheap ($10 - $20) but today, there are few places where
you can get a good look at tools before buying. Certainly, they have a far
better selection than Sears or most chain hardware stores.
They also had some nice, small, thin metal sheets.
YMMV,
-John
=================
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Re: Foam conductor problems
On 01/19/13 04:48 PM, David DiGiacomo wrote: No, he is referring to a type of interboard connector which consists
of stiff wires embedded in elastomer. It's in the same family as
zebra strips, but works for higher current applications. Does it have to be conductive throughout the volume, or would surface conductivity do? There are plenty of companies selling conductive plastics. was my first hit with Google, but there are tons more. -- Dr. David Kirkby Ph.D C.Eng MIET
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Re: CONNECTOR RECEPTACLE ELECTRICAL SCM22D/7-1HP
after buying the item on ebay :
3 pieces very happy
I weld it on my HP3586B to put the same plate cracked in half, after he and soldering
put another new same split in half to my surprise although 22 pins each route
he and thinner to put the board splits in the middle, who can help me with the original connector
can be used or direct me to some one who really
Thanks
Joarez
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Re: Foam conductor problems
On Sat, Jan 19, 2013 at 8:05 AM, Peter Bunge <bunge@...> wrote: My two Advantest TR5823H did not work because of bad conductive foam in the pushbutton switches. I opened all of the switches and put a dab of conductive stuff sold to repair rear window defrosters in cars. It has been several years now and there is no sign of the problem returning. I hope I am referring to the same kind of conductive foam switches, I have not been following this thread. No, he is referring to a type of interboard connector which consists of stiff wires embedded in elastomer. It's in the same family as zebra strips, but works for higher current applications.
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Re: Hello, and 16500A memory sizes
On Sat, Jan 19, 2013 at 4:05 PM, Glen Slick <glen.slick@...> wrote: **
On Sat, Jan 19, 2013 at 7:50 AM, Chris Jones chris@...> wrote:
Now I've installed ROMs version 00.02, and the 16500A has developed a
new fault: the self-tests 'HIL Controller', 'Front Panel' and 'Touch
Screen'
all fail. I thought it was a software problem but putting the old 00.00
ROMs back in the problem is still there. I'm hoping it's just a bent pin
on the backplane connector or something but it's very annoying to get this
far and have a new fault to deal with, apparently unrelated to the RAM.
Has anyone got experience of what's likely to cause these three self-test
failures?
Chris Don't all of those things connect through the same ribbon cable
between the front panel and the CPU board? Are you sure that cable
was reconnected correctly at both ends when you reinstalled the CPU
board? Or does that cable connect between the front panel and the
backplane board? It's been a while since I opened up a 16500.
Yes, I think they do - there's a 10-way ribbon with IDC connectors between the backplane and the front panel which looks like it carries the data. I checked that it was properly seated, and unplugged and reinserted it, but with no effect. I think on the later machines this 10-way ribbon is somehow associated with the display cable, isn't it? Anyhow, since it comes from the backplane in the 16500A, I'm assuming that the signals to it must cross the CPU board/backplane connector at some point, and I hope that the problem is simply a bent pin or similar there. Chris
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Re: [TekScopes2] "Event logging" T & M equipment?
Companies like Dranitz make boxes specifically for that purpose. Older
ones can be bought pretty cheaply. They will likely need new batteries.
-John
==============
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Data logging devices are commonplace now days. Many high-end multimeters
have such a feature where you can plug the meter up to a power source and
record levels over time.
But I'm interested in recording out-of-bounds events such as spikes and
sags in mains supply.
This type of measurement is typically only found in power systems
analyzers which are quite "$pendy".
Anybody know of an event logger that is affordable?
THanks,
Dave
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Re: Hello, and 16500A memory sizes
On Sat, Jan 19, 2013 at 7:50 AM, Chris Jones <chris@...> wrote:
Now I've installed ROMs version 00.02, and the 16500A has developed a
new fault: the self-tests 'HIL Controller', 'Front Panel' and 'Touch Screen'
all fail. I thought it was a software problem but putting the old 00.00
ROMs back in the problem is still there. I'm hoping it's just a bent pin
on the backplane connector or something but it's very annoying to get this
far and have a new fault to deal with, apparently unrelated to the RAM.
Has anyone got experience of what's likely to cause these three self-test
failures?
Chris
Don't all of those things connect through the same ribbon cable between the front panel and the CPU board? Are you sure that cable was reconnected correctly at both ends when you reinstalled the CPU board? Or does that cable connect between the front panel and the backplane board? It's been a while since I opened up a 16500. -Glen
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Re: Hello, and 16500A memory sizes
On Fri, Jan 18, 2013 at 11:34 AM, Chris Jones <chris@...> wrote: On 18/01/2013 11:24, Alexandre "tabajara" Souza wrote:
Chris, probably you're missing two addressing lines to upgrade it to
4mb. I think i have a newer board with
More memory, but it is some 600km away, i'll take a look at it as soon
as i can
The DRAM chips only need one more address line to be 4Mbit rather than
1Mbit (they're a matrix, not a linear array), and that address line (pin 5)
is definitely wired up (to one of the PALs, if I remember rightly) on this
CPU board, which is what made me think the upgrade was worth a try. The
full story is here, complete with wiring details:
<>
I would be interested to know what a newer 16500A CPU board looks like.
I've seen distant photos of them on eBay which appear to show SIL memory
chips.
Now I've installed ROMs version 00.02, and the 16500A has developed a new fault: the self-tests 'HIL Controller', 'Front Panel' and 'Touch Screen' all fail. I thought it was a software problem but putting the old 00.00 ROMs back in the problem is still there. I'm hoping it's just a bent pin on the backplane connector or something but it's very annoying to get this far and have a new fault to deal with, apparently unrelated to the RAM. Has anyone got experience of what's likely to cause these three self-test failures? Chris
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Re: "Event logging" T & M equipment?
On Fri, 18 Jan 2013 20:37:05 -0800, you wrote: Data logging devices are commonplace now days. Many high-end multimeters have such a feature where you can plug the meter up to a power source and record levels over time.
But I'm interested in recording out-of-bounds events such as spikes and sags in mains supply.
This type of measurement is typically only found in power systems analyzers which are quite "$pendy".
Anybody know of an event logger that is affordable? Why not make one? Take anyone's microprocessor board (Arduino would work well), feed it with AC, biased to half the supply voltage, then do a fast A/D on it. This gives you a running peak to peak voltage reading that you can examine for sags, excursions and the like. You can get either an RS-232 interface or USB as you wish. Harvey
THanks,
Dave
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Re: Foam conductor problems
My two Advantest TR5823H did not work because of bad conductive foam in the pushbutton switches. I opened all of the switches and put a dab of conductive stuff sold to repair rear window defrosters in cars. It has been several years now and there is no sign of the problem returning. I hope I am referring to the same kind of conductive foam switches, I have not been following this thread.
Peter.
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----- Original Message -----
From: Gary
To: hp_agilent_equipment@...
Sent: Friday, January 18, 2013 8:50 PM
Subject: [hp_agilent_equipment] Re: Foam conductor problems
After taking these boards apart many times the results were always the same, either one or more LEDs and one or more buttons were not working. Every time it was a different set of buttons or LEDs. So I decided to take out the conductive foam and make my own mechanical connection using molex connectors and a right angle header. Now all the buttons and LEDs are working perfectly. Pictures of my mod are documented under "3561A repair"
Gary
--- In hp_agilent_equipment@..., "Gary" wrote:
>
> Thanks for the advice Karl; I'll give it a try.
>
> Gary
>
> --- In hp_agilent_equipment@..., Karl Schmeer wrote:
> >
> > Conductive foam:? I have found the torque on the mounting screws needs to be
> > near perfectly? equal for these to work. Lots of trial and error :-)
> >
> > As for the switch contacts, I have found it is a good idea to wash? with
> > distilled water? after the soaking in alcohol for a couple of hours, After this,
> > they need to dry overnight before re-installing. They will not work right away!
> > BTW recently I have found placing wet things on top of my de-humidifier, where
> > the really dry air comes out speeds up? the process.
> >
> > Best Luck
> >
> > Karl
> >
> >
> >
> > ________________________________
> > From: Gary
> > To: hp_agilent_equipment@...
> > Sent: Fri, December 28, 2012 10:19:59 PM
> > Subject: [hp_agilent_equipment] Foam conductor problems
> >
> > ?
> > I've added some pictures under "3561A repair" to document a problem with my SA.
> > All the electronics check out after replacing some parts but some of the buttons
> > and most of the LEDs were not working on the front panel. After opening the
> > front panel I found that this conductive foam seems to be the culprit. I've
> > repaired LCD displays by cleaning conductive foam but the conductors in this
> > foam seem very small. I cleaned it up with some ISO-alcohol and some of the LEDs
> > started working but some of the key pads quit working. I cleaned it a second
> > time and the same results. Some other buttons are working but some still not.
> > The LED problem is solely the problem of the conductive foam but the keys could
> > also be the conductive pads on the rubber keys. I've measured the resistance on
> > most of the pads and they are about 50 ohms except for some that are 200 ohms
> > and greater (up to about 480 ohms). I'm not sure what the max resistance can be
> > and still make the key function. My solution first is to just solder the two
> > boards with a connection harness to eliminate the conductive foam but I'm not
> > sure how to fix the rubber key problem. I have some conductive paint but the
> > resistance is still high, around 150 ohms. Does anyone have any success
> > repairing this kind of problem?
> >
> > Gary
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
[Non-text portions of this message have been removed]
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Re: How to test a mixer on a hp 8559 plugin in a 853 main frame
How about the other tests recommended? Throw some low level signals at the various IF's and see if you get a response. If the IF's work, could be a bad mixer (I doubt it with no 000 response), more likely no LO signal. That could be a bad connector, bad YTO, etc. you can check the oscillators with a diode detector if you don't have testing at those frequencies. Enjoy the art of troubleshooting.
Hey you guys, chime in here....
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--- In hp_agilent_equipment@..., "steven" wrote:
When its tuned to freq 000 there's no response
--- In hp_agilent_equipment@..., "jeffwa2scl" wrote:
Do you still get zero MHz response? If so, the 1st IF on are working to at least some degree. Baseline noise on wide RBW means the last IF and video are working. Can you inject some signals into the IF's directly. I think they are 2050, 321.4, and 21.4 in the 8559.
Divide and conquer. If you get the above responses, try connecting the calibrator directly to the mixer module input, bypassing the input lines and attenuator. Trace the signal path on the block diagram and work stage by stage.
Most of all, look at it as a challenge rather than a chore - have some fun with it (before you toss it across the room).
--- In hp_agilent_equipment@..., "steven" wrote:
--- In hp_agilent_equipment@..., "jeffwa2scl" wrote:
It very well may still be present, but it would be down quite a bit from where it should be, maybe 20 db or more down. I have an 8558 that was about 10 db down and suspected the mixer. Turned out it was the isolation capacitor in the input jack. Unless you transmitted into the mixer, they're tougher than you think and can take 10 dbm or so without problem. How's the sensitivity on the higher bands? These bypass the 1st IF and 2nd mixer.
--- In hp_agilent_equipment@..., "steven" wrote:
If the mixer is bad will there still be a 35mhz calibraed signal on the screen? please let me know asap. thank you
Nothing is showing at all high or low bands
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On Sat, Jan 19, 2013 at 12:16:01AM -0800, John Miles wrote: Lots of Advantest spectrum analyzers out there. Many with great
performance, some at good prices. Few/none with schematics. Do you feel
lucky? In the past schematics could be had from Japan for some of these. Maybe they tightened up. -- Dave Emery N1PRE/AE, die@... DIE Consulting, Weston, Mass 02493 "An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either."
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Lots of Advantest spectrum analyzers out there. Many with great
performance, some at good prices. Few/none with schematics. Do you feel
lucky?
-- john, KE5FX
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-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of Doug
Sent: Friday, January 18, 2013 11:30 PM
To: hp_agilent_equipment@...
Cc: Jeff Miller
Subject: Re: [hp_agilent_equipment] Re: Spectrum Analyzer
On 01/18/2013 10:07 PM, Jeff Miller wrote:
Just curious,
What do you think of the Advantest SA vs HP or Tektronix brands?
Thanks in advance.
Jeff M.
I am now retired for almost 10 years, but at my place we had about 4 or 5
Advantest SAs. They worked very well, and are relatively small. One thing I noticed is that the CRT would go dim a little sooner than that of some other CRT-using devices. (As usual in r&d labs, the equipment was never turned
off, day and nite, day in and day out.) For normal use in a home lab, I
would
not expect that to be a problem. Maybe the newer ones have LCD displays,
and then you would not have to worry about that.
I would think if anyone is buying a new SA, or even a used one, a tracking
generator is a huge improvement on the capabilities of the SA, so spend the extra money. This obviously applies to any make that offers the capability.
--doug, WA2SAY, retired RF engineer
------------------------------------
Yahoo! Groups Links
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On 01/18/2013 10:07 PM, Jeff Miller wrote:
Just curious,
What do you think of the Advantest SA vs HP or Tektronix brands?
Thanks in advance.
Jeff M.
I am now retired for almost 10 years, but at my place we had about 4 or 5 Advantest SAs. They worked very well, and are relatively small. One thing I noticed is that the CRT would go dim a little sooner than that of some other CRT-using devices. (As usual in r&d labs, the equipment was never turned off, day and nite, day in and day out.) For normal use in a home lab, I would not expect that to be a problem. Maybe the newer ones have LCD displays, and then you would not have to worry about that. I would think if anyone is buying a new SA, or even a used one, a tracking generator is a huge improvement on the capabilities of the SA, so spend the extra money. This obviously applies to any make that offers the capability. --doug, WA2SAY, retired RF engineer
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Re: "Event logging" T & M equipment?
Can't get a lot cheaper than that.
(Another) Dave Thanks for that Dave. In this day of digital and handheld T & M, this is antique, but affordable and functional it is... Dave (yet another)
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Re: "Event logging" T & M equipment?
Dave
No relation to seller, but here is an expandable, newer model Dranetz unit with a line analyzer plugin and a 30 day right of return, for $61, including shipping (at least to my location).
Can't get a lot cheaper than that.
(Another) Dave
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On 1/18/2013 11:37 PM, Dave C wrote: Data logging devices are commonplace now days. Many high-end multimeters have such a feature where you can plug the meter up to a power source and record levels over time.
But I'm interested in recording out-of-bounds events such as spikes and sags in mains supply.
This type of measurement is typically only found in power systems analyzers which are quite "$pendy".
Anybody know of an event logger that is affordable?
THanks,
Dave
|
Re: How to test a mixer on a hp 8559 plugin in a 853 main frame
When its tuned to freq 000 there's no response
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Show quoted text
--- In hp_agilent_equipment@..., "jeffwa2scl" wrote:
Do you still get zero MHz response? If so, the 1st IF on are working to at least some degree. Baseline noise on wide RBW means the last IF and video are working. Can you inject some signals into the IF's directly. I think they are 2050, 321.4, and 21.4 in the 8559.
Divide and conquer. If you get the above responses, try connecting the calibrator directly to the mixer module input, bypassing the input lines and attenuator. Trace the signal path on the block diagram and work stage by stage.
Most of all, look at it as a challenge rather than a chore - have some fun with it (before you toss it across the room).
--- In hp_agilent_equipment@..., "steven" wrote:
--- In hp_agilent_equipment@..., "jeffwa2scl" wrote:
It very well may still be present, but it would be down quite a bit from where it should be, maybe 20 db or more down. I have an 8558 that was about 10 db down and suspected the mixer. Turned out it was the isolation capacitor in the input jack. Unless you transmitted into the mixer, they're tougher than you think and can take 10 dbm or so without problem. How's the sensitivity on the higher bands? These bypass the 1st IF and 2nd mixer.
--- In hp_agilent_equipment@..., "steven" wrote:
If the mixer is bad will there still be a 35mhz calibraed signal on the screen? please let me know asap. thank you
Nothing is showing at all high or low bands
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Re: "Event logging" T & M equipment?
Dave,
I'm not sure how big your budget is, but I've picked up good working older model Dranetz power line analyzers for less than $200 on eBay. There are over 250 listings from them up now. They are plug and play, and record all of the parameters you mentioned.
(Another) Dave
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On 1/18/2013 11:37 PM, Dave C wrote: Data logging devices are commonplace now days. Many high-end multimeters have such a feature where you can plug the meter up to a power source and record levels over time.
But I'm interested in recording out-of-bounds events such as spikes and sags in mains supply.
This type of measurement is typically only found in power systems analyzers which are quite "$pendy".
Anybody know of an event logger that is affordable?
THanks,
Dave
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