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Re: Racks for older equipment

 

Worst case would be a 19" relay rack.? I got one years ago for free from an estate- the guy had stacked up 60's HP gear on it, but only two were attached to the rack.? I actually ended up doing the same thing- the rack is for long term storage only, but it does move easily, even with a full stack sitting on it. Two or three are attached for stability.

-Dave

On Friday, April 10, 2020, 03:28:28 PM PDT, 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 --------
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

Re: Racks for older equipment

 

On 4/10/20 7:08 PM, Stephen Hanselman wrote:
In answer to your question, a person who has tried to give them away and
had no takers. Sort of like our excess 6ft tech benches
Hey, I want a few of those so badly I can almost taste it, both for my
lab and for the restoration workshop around the corner at the museum. I
just can't afford to have them freighted up here.

We are this close --> <-- to getting our 501(c)(3) nonprofit
registration, though, so maybe you'll still have them after we start
applying for grants.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
Re: Racks for older equipment

 

¿ªÔÆÌåÓý

In answer to your question, a person who has tried to give them away and had no takers. Sort of like our excess 6ft tech benches

Regards,

?

Stephen Hanselman

Datagate Systems, LLC




On Apr 10, 2020, at 15:26, Dave Seiter <d.seiter@...> wrote:

?
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
Re: Craigslist HP 8566B Indianapolis

 

In response to Dave D

The fellow who is selling the unit said it came from a working shop but that the display section did not work. He said he thought the lower section was tested with another display and it worked. He also said that he could get output from the RF section.?
Isn't there another fellow in Houston on this site selling one for $500, working?

To Dave M, re: Marconi 2380
I have almost all HP equipment also.
I received a great deal of help from some guys on the Marconi Groups io when I needed advice on repairing mine. I think at least two of them seemed to have worked for Marconi and seemed extremely knowledgeable about the unit. I do not think I have ever received more expert advice, if you have problems with your Marconi, I would recommend joining the group.
I changed the input on mine from 75 ohms to 50 ohms. Then had a problem with the keypad "bouncing" e.g. putting up 22 when I just hit 2 once. If that is your problem, I have all my notes. Also the thread was relatively recent and should be easily found.?
Wally KC9INK

Wally KC9INK?
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
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
Re: Racks for older equipment

 

¿ªÔÆÌåÓý

...tested one...

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

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 --------
From: "wallydoc via " <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

Re: Racks for older equipment

 

¿ªÔÆÌåÓý

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

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 --------
From: "wallydoc via " <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

Re: Racks for older equipment

 

¿ªÔÆÌåÓý

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 --------
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

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
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.
Re: 5343A troubles

 

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


On Fri, Apr 10, 2020 at 7:49 PM Daniel Sheen <danielsheen5@...> wrote:

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
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

20190324_170726_r.jpg

OFF TOPIC: MEGURO MAK-6610 Audio Analyzer Service Manual

 

Hello guys,

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!!! ?

Regards,

Bernard.
Re: Racks for older equipment

Leon Robinson
 

¿ªÔÆÌåÓý

HEIC is a high resolution photo format search for HEIC file converter.

HEIC is an Apple file format


Sent from K5JLR


-------- 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.
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
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!
Re: 4195A question

 

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@...>:

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
Re: HP 334A Balance Pots

 

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.
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
46781 - 46800 of 151468