Re: Racks for older equipment
On 4/10/20 6:41 PM, Dave Daniel wrote: I inadvertantly tested ?measuring 4¡¯w x 18¡±d x 72¡±h with large HD
casters by overloading it with books stacked vertically, a row of stacks
on each side of the shelving unit. The shelves distorted a bit. But I
went to roll it, one of the caster threaded inserts broke through the
leg pipe. So, yes, pas attention to shelf loading and caster loading. Many years ago, I dated an architect for a few years. She was a commercial architect. She told me about a car dealership with a second-floor showroom and a library that she designed. The weight load of the library floor was about 3x that of the car showroom floor. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Racks for older equipment
On 4/10/20 6:28 PM, Jim Ford wrote: I'd be concerned about the weight.? Audio gear tends to be a lot lighter
than microwave gear.? They were throwing away some 19 inch server racks
at work a month ago or so, and I would have grabbed one, but I figured
it wouldn't hold the weight of my stuff.? Be careful and stay safe, both
physically and biologically.? Hmm, methinks you've never had to move a few kW worth of stage amplifiers. ;) -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Racks for older equipment
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On Apr 10, 2020, at 18:41, Dave Daniel < kc0wjn@...> wrote: I inadvertantly tested ?measuring 4¡¯w x 18¡±d x 72¡±h with large HD casters by overloading it with books stacked vertically, a row of stacks on each side of the shelving unit. The shelves distorted a bit. But I went to roll it, one of the caster threaded inserts broke through the leg pipe. So, yes, pas attention to shelf loading and caster loading.
Nothing really bad happened. I was able to block up the end with broken leg until I coukd unload the books. I¡¯ll have to get a new leg and threaded insert. For now, it¡¯s glued back together with JB Weld.
DaveD I'd be concerned about the weight.? Audio gear tends to be a lot lighter than microwave gear.? They were throwing away some 19 inch server racks at work a month ago or so, and I would have grabbed one, but I figured it wouldn't hold the weight of my stuff.? Be careful and stay safe, both physically and biologically.?
Jim Ford?
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message -------- Date: 4/10/20 4:09 AM (GMT-08:00) Subject: [HP-Agilent-Keysight-equipment] Racks for older equipment
I have a bunch of old HP and other equipment and am using a Tek scope stand for some of it. I was wondering if anyone had any suggestions about rolling stands for TE, Do the rolling racks?that musicians use for their audio equipment work well enough? They are 19 inch racks. Any suggestions would be helpful. Wally KC9INK
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Re: Racks for older equipment
I inadvertantly tested ?measuring 4¡¯w x 18¡±d x 72¡±h with large HD casters by overloading it with books stacked vertically, a row of stacks on each side of the shelving unit. The shelves distorted a bit. But I went to roll it, one of the caster threaded inserts broke through the leg pipe. So, yes, pas attention to shelf loading and caster loading.
Nothing really bad happened. I was able to block up the end with broken leg until I coukd unload the books. I¡¯ll have to get a new leg and threaded insert. For now, it¡¯s glued back together with JB Weld.
DaveD
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On Apr 10, 2020, at 18:28, Jim Ford < james.ford@...> wrote: I'd be concerned about the weight.? Audio gear tends to be a lot lighter than microwave gear.? They were throwing away some 19 inch server racks at work a month ago or so, and I would have grabbed one, but I figured it wouldn't hold the weight of my stuff.? Be careful and stay safe, both physically and biologically.?
Jim Ford?
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message -------- Date: 4/10/20 4:09 AM (GMT-08:00) Subject: [HP-Agilent-Keysight-equipment] Racks for older equipment
I have a bunch of old HP and other equipment and am using a Tek scope stand for some of it. I was wondering if anyone had any suggestions about rolling stands for TE, Do the rolling racks?that musicians use for their audio equipment work well enough? They are 19 inch racks. Any suggestions would be helpful. Wally KC9INK
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Re: Racks for older equipment
I'd be concerned about the weight.? Audio gear tends to be a lot lighter than microwave gear.? They were throwing away some 19 inch server racks at work a month ago or so, and I would have grabbed one, but I figured it wouldn't hold the weight of my stuff.? Be careful and stay safe, both physically and biologically.?
Jim Ford?
Sent from my Verizon, Samsung Galaxy smartphone
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-------- Original message -------- From: "wallydoc via groups.io" <wallydoc@...> Date: 4/10/20 4:09 AM (GMT-08:00) Subject: [HP-Agilent-Keysight-equipment] Racks for older equipment
I have a bunch of old HP and other equipment and am using a Tek scope stand for some of it. I was wondering if anyone had any suggestions about rolling stands for TE, Do the rolling racks?that musicians use for their audio equipment work well enough? They are 19 inch racks. Any suggestions would be helpful. Wally KC9INK
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Re: Racks for older equipment
Condition can be an issue; about two years ago a local Japanese-style place was remodeling and offered about 15 racks of different sizes for free, but most were either too big for my use and/or were too rusty near the bottom.? I only got one because they were almost impossible to disassemble.? A few weeks later most were still there.
-Dave
On Friday, April 10, 2020, 11:45:35 AM PDT, Dave McGuire <mcguire@...> wrote:
> I found one of those carts in a dumpster once; turned into a very handy
> project cart for my shop.
? What kind of idiot would dumpster one of those?? Jeeze.
? ? ? ? ? ? -Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
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Re: OFF TOPIC: MEGURO MAK-6610 Audio Analyzer Service Manual
Hi
Meguro merged with Keisoku some time ago.
You can contact them and try to ask for a copy of the service manual.
I have had good luck with japanese equipment.They were very kind.
Regards.
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Hi Daniel,
Check the power lines for ripple. I have a HP 5351B dumpster find, that did not work to well, needed higher input level, and did not work on all frequencies... It was missing one of the capacitors in the power supply, so lots of ripple. After finding the missing cap, and putting in a new one, it behaved great.
Might not be your issue, but its an easy check..
BR, Askild
Hi all, ? I have a rather bizarre problem with a 5343A counter. Observed symptoms are that the high frequency input works reliably up to about 250MHz, reads garbage from around 250MHz-800MHz, and then seems to work fine from 800MHz upward through 1GHz (I only have an 8640B handy atm so can't really test higher than that). Cranking up the input power a bunch seems to reduce the dead band to closer to 400MHz-600MHz. ? The counter initially failed troubleshooting step 4 in the service manual. That was resolved by replacing the A10 board (from another counter with a blown sampler). It now passes step 5 and is marginal on step 6 (sensitivity is a little lower than it ought to be but it seems to work). ? The one other observation I've made is the IF amplitude into and out of A11 drops off rapidly if an input is tuned into the range of frequencies that it's insensitive to, but I'm struggling to find a plausible explanation for why that could occur given my understanding of the counter design (that wouldn't also make higher frequencies not be detected). ? If anyone has any thoughts or has run into this before, suggestions would be appreciated. ? Thanks, Daniel, KC1EPN
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Re: HP54603B Software Gremlins
Hi Andreas,
Yes, flash would be nice, but back when these where designed, that was not a good option for reliable long operation.
You could try to do what I did with the M48Z18 inside my HP 54645A scope. I removed it from the PCB and put in a socket. Looked at the IC, and it looked like an IC epoxied into a bigger housing. So I heated it up and used a small screwdriver to pry the IC out of the epoxy. The battery/batteries, it can be one or two on top of the IC. They where connected to the ends of the IC. I just connected a new lithium battery to one side, see picture attached.
When dismantling, pay attention to where the + and - of the battery connects..
BR, Askild
On Fri, Apr 10, 2020 at 12:45 PM Andreas Zilker via <dg7rbn= [email protected]> wrote: Hi Askild,
thanks a lot for the clear and detailed pointer.
With "nonvolatile trace memory" mentioned in the manual, I thought of something
more durable (EEPROM, FlashROM) than a battery back-up SRAM :-) Would have
been nice, if the programmers had added some CRC or at least a checksum to the
data compression throwing an error message if something fails. At least they had
time for the famous "Tetris game" :-P
As the price tag for the M48Z128Y replacement from Maxim is in the $30 range,
(and then you dont't know how old it is already) I'm thinking of setting up a
"discrete" solution with a $3 128kSRAM, a coincell and 2 Schottky-Diodes
(or a DS1210).
Cheers??? Andreas
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OFF TOPIC: MEGURO MAK-6610 Audio Analyzer Service Manual
About 4 years ago I got for cheap a non working Meguro MAK-6610 Audio Analyzer. I have since been desperately trying to find a service manual for it but no luck. Do any of you happen to have it? I'd be forever grateful!!! ?
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Re: Racks for older equipment
HEIC is a high resolution photo format search for HEIC file converter.
HEIC is an Apple file format
Sent from K5JLR
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-------- Original message -------- From: Daun Yeagley <daun@...> Date: 04/10/2020 11:46 AM (GMT-06:00) To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] Racks for older equipment
What is a ".HEIC" file?? I can't open it.
Daun
Daun E. Yeagley II, N8ASB
On 4/10/2020 12:05 PM, bownes wrote:
The
other thing that works well is the wire rack rolling carts.
They will hold a lot of weight and an outlet strip fits well
behind the handle. I keep the gear on a set of wire rack
shelves, roll the cart over, pull off what I need for a given
exercise, roll the cart back to the bench, and off I go.
On Fri, Apr 10, 2020 at 9:08
AM ArtekManuals < manuals@...>
wrote:
Wally
Depends on largely on
1) The size of the castors ( wheels), bigger wheels are
generally easier
to deal with and actually less likely catch and tip
2) The floor surface they are rolling on
Weight? can be a factor, put? heavier on the bottom -Lighter
on the top
) think low center of gravity
Though things have changed in my current set up and I have
long since
abandoned the racks, you used to be able to find racks that
were 36"?
high. I really like these if you have the room as the make
great rolling
"table tops" with a power supply in the bottom
Dave
NR1DX
On 4/10/2020 7:09 AM, wallydoc via
wrote:
> I have a bunch of old HP and other equipment and am using
a Tek scope
> stand for some of it. I was wondering if anyone had any
suggestions
> about rolling stands for TE, Do the rolling racks?that
musicians use
> for their audio equipment work well enough? They are 19
inch racks.
> Any suggestions would be helpful.
>
> Wally KC9INK
>
--
Dave
Manuals@...
--
This email has been checked for viruses by Avast antivirus
software.
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HP cal/vfy software, RMB, etc, was Re: [HP-Agilent-Keysight-equipment] 4195A question
On 4/10/20 4:47 PM, Bruce wrote: Be happy to help - lets talk off line.? I have a working 900/300
system with HPIB, basic and HP UX, needing only a color monitor (have
the B/G monitor). Ok, thanks. I have a lot of HP/UX experience, but almost no knowledge of the RMB systems so I'm starting cold there. I've recently recovered (typed in, from an un-scannable listing!) the HP 85867A EMI receiver software for the 8566/8568 spectrum analyzers. I'm hoping to get that running; that was my original impetus to start digging into the RMB stuff. Do you have a favorite imaging software?? I've been using a program
called Omniflop - seems to archive just about any format I've run into. Uh, that's for Windows I think. Does it store its image data in a documented format? If not, you're asking for trouble. Depending on the need, I use either HP's LIF utilities, ImageDisk, or TeleDisk. The latter two use documented storage formats. I have a dedicated system with the right floppy controller chip to handle most format variations, set up for 3.5", 5.25", and 8" disks. It dual-boots FreeDOS (for the floppy utilities) and Linux, and the Linux side can see the FreeDOS filesystem for import/export of image data. That system also handles 9-track magtapes IBM 3480 and 3490 tapes, and DEC TK50/TK70 tapes. Media media everywhere. Anyway, contact me off line for more discussion. Ok. It will be awhile before I can get to this. I already had my hands full before this weeks' damn tornado, now I've messes to clean up on top of that. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Seeking advice on a precision DVM
Opps, I have to correct my statement about the lowest resistance range for the Keithley 2000 and the integra 2700, 2701 models. The only model in that line providing 1 (and 10) ohm ranges is the 2750, which is not as common on the auction site and probably not priced competitively (it is also a full size form factor).
But even with 100 Ohms as the lowest range, I highly recommend the 2000 and it's sisters. Just be careful that you don't buy one with a dim display!
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Be happy to help - lets talk off line. I have a working 900/300
system with HPIB, basic and HP UX, needing only a color monitor (have
the B/G monitor).
Do you have a favorite imaging software? I've been using a program
called Omniflop - seems to archive just about any format I've run into.
Anyway, contact me off line for more discussion.
Cheers!
Bruce K9BC
bruce@...
H
Quoting Dave McGuire <mcguire@...>:
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Yup, definitely interested. It's a lot of stuff and I'm spread a bit
too thin.
-Dave
On 4/10/20 3:53 PM, Bruce wrote:
Put me on the list to notify as you get to them.? I could help if you
are interested in help.
Cheers!
Quoting Dave McGuire <mcguire@...>:
On 4/10/20 3:16 PM, Bruce wrote:
I'd like to correspond off line about how you did the translation.? I'd
like to do the same for the 8340 and some other equipment I have.? As I
said, I have an 9000/300 system and a good hpib analyzer to work with.?
I'd be interested in any insight you have developed in the process of
translating the software.? I'd be willing to share any of the HP softwar
I've collected ? On that note, I have calibration and verification software for many,
many different instruments that I got from a calibration house that shut
down.? It will be awhile before I will be able to image the disks and
tapes, but that is my eventual plan.? They are safe for now.
????????????? -Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
--
Dave McGuire, AK4HZ
New Kensington, PA
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The balance pots have to work up to hundreds of kilohertz. I don't know if a wire wound would behave. I think my new control is conductive plastic. It just has to be durable, quiet, and stay put. Dave Wise ________________________________________ From: [email protected] < [email protected]> on behalf of n4buq via groups.io <n4buq@...> Sent: Friday, April 10, 2020 12:19 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 334A Balance Pots I wondered about doing something similar and have experienced what you're describing as well. Even though they're W-W, I also wondered if a ten-turn pot would work well and may give it a try (outside of the box). Of course you can't get to a balance point as quickly, it may make fine tuning somewhat easier. Thanks, Barry - N4BUQ ----- Original Message ----- From: "Dave Wise" <david_wise@...>
To: [email protected]
Sent: Friday, April 10, 2020 2:14:29 PM
Subject: Re: [HP-Agilent-Keysight-equipment] HP 334A Balance Pots
?My 332A's COARSE pot did not respond adequately to cleaning. I replaced it.
I do not like concentric controls in this application - it's too easy for
FINE motion to nudge COARSE slightly. I drilled a hole and installed a
separate pot. I'm very satisfied with the way the controls behave, if not
how they look.
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Re: Craigslist HP 8566B Indianapolis
On 4/10/20 6:49 AM, wallydoc via groups.io wrote: Just recently, I was working on my Marconi 2380 Spectrum Analyzer and
realized there was a need for a decent anti gravity device. However my
inquiries to the government about their gravity wave program were not
met with any degree of sincerity. Apparently they have some sort of very
large device that can measure gravity "waves". That would certainly be handy. I too have a Marconi 2380+2382. I had one many years ago and loved it, but had to sell it during a bad situation. I was lucky enough to find another one about two years ago, and it "sorta works" but is very flaky. Most of its issues seem digital in nature. I've yet to really dig into it. I'm a total HP snob, but those Marconi 2380s are really nice spectrum analyzers. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: Seeking advice on a precision DVM
Hi all
this is one of my favorite topics (i must own over 100 different models of digital multimeter) so it is hard for me to resist adding my 2 cents!
I think the immediate requirement of higher accuracy measurements of resistance in the range of 0.1 ohm is a good place to start.
the meters that the other folks have recommended are all pretty good candidates, the practical differences for the intended use really boil down most to things like display type, physical size, and expected reliability and stability.
i would like to add one candidate (which did get a passing mention) the Keithley 2000 and its variants, especially the 2700 ¡°data acquisition unit¡± (which is more or less a model 2000 with additional multichannel data and signal input circuits) the reason this meter is noteworthy is that they are selling, in working condition, in the same range as the gold standard hp 34401a, around $300.
the 2700 has very similar accuracy, slightly better drift specs (and in my experience markedly better drift performance) and a 1 ohm resistance range! The 34401a lowest range is 100 ohms, and the 3457 30 ohms. Of course with accuracies on the order of 40-80 ppm (90 day specs) the useful resolution for a 0.1 ohm measurement is 4 digits. All of these meters can do that.
And actually price/performance might lead you to the hp 3457, they are ridiculously cheap. But they are full rack size units, like the 3456 also. And bench space is important, to me!
so I recommend a Keithley 2000 or 2700 or one of their other ¡°integra series¡± 6-1/2 digit models.?
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Yup, definitely interested. It's a lot of stuff and I'm spread a bit
too thin.
-Dave
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On 4/10/20 3:53 PM, Bruce wrote: Put me on the list to notify as you get to them.? I could help if you
are interested in help.
Cheers!
Quoting Dave McGuire <mcguire@...>:
On 4/10/20 3:16 PM, Bruce wrote:
I'd like to correspond off line about how you did the translation.? I'd
like to do the same for the 8340 and some other equipment I have.? As I
said, I have an 9000/300 system and a good hpib analyzer to work with.?
I'd be interested in any insight you have developed in the process of
translating the software.? I'd be willing to share any of the HP softwar
I've collected ? On that note, I have calibration and verification software for many,
many different instruments that I got from a calibration house that shut
down.? It will be awhile before I will be able to image the disks and
tapes, but that is my eventual plan.? They are safe for now.
????????????? -Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
--
Dave McGuire, AK4HZ
New Kensington, PA
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On 4/10/20 3:55 PM, Bruce wrote: I could also verify the software for anything requiring HP 9000 / 300
computers I'll be doing that too; I have quite a lot of that hardware. I still have to get things set up, get RMB loaded, etc. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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I could also verify the software for anything requiring HP 9000 / 300
computers
Quoting Dave McGuire <mcguire@...>:
toggle quoted message
Show quoted text
On 4/10/20 3:16 PM, Bruce wrote:
I'd like to correspond off line about how you did the translation.? I'd
like to do the same for the 8340 and some other equipment I have.? As I
said, I have an 9000/300 system and a good hpib analyzer to work with.?
I'd be interested in any insight you have developed in the process of
translating the software.? I'd be willing to share any of the HP softwar
I've collected On that note, I have calibration and verification software for many,
many different instruments that I got from a calibration house that shut
down. It will be awhile before I will be able to image the disks and
tapes, but that is my eventual plan. They are safe for now.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
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Dave McGuire
