Date   

Re: Music made to be visualized on a Scope!

Richard Knoppow
 

Not sure if this is the master patent.
   I remember seeing an article descibing construction in some magazine like Popular Mechanics or Science and Mechanics sometime in probably the late 1940s. I saw and heard my first one on TV at about that time. I considered building one but never attempted it.
   The Theremin was used in the score of a couple of movies. I think they were "The Lost Weekend" and a Hitchcock's "Spellbound" I think "The Lost Weekend" was recorded first but "Spellbound" was released first (or maybe the other way around). Anyway, I think "Spellboung" was supposed to be the first film using the Theremin but "The Lost Weekend" got out first. The same musician, Samuel Hoffenstein(sp?) did both. There was a flood of stuff with the Theremin and then the novelty wore off.

On 4/12/2020 9:03 PM, greenboxmaven via groups.io wrote:
The oscillator coils are quite large, especially the vertical antenna beat frequency coil. They have many hundreds of turns of rather fine wire wound very closely. This is needed so a very small capacitance change from waving your hand near the pitch antenna will give a substantial change in frequency.

     Bruce Gentry, KA2IVY


On 4/12/20 8:57 PM, Ernesto wrote:
LOL, greenboxmaven

You could become a genius if your scheme leads to some higher order of Lissajous curves modulated by the beating frequency.
For RCA the "instrument for everyone" should have been the radio and the turntable.
After one hour one can play a decent tune on a piano.  And after years, one can make good music with an older proximity instrument, the proximity of the finger to the bridge in the violin.
I wonder what makes the coils of the theremin so superhuman. Are they more difficult to wind than a Tektronix HV transformer?

Ernesto




--
Richard Knoppow
dickburk@...
WB6KBL


Re: Music made to be visualized on a Scope!

greenboxmaven
 

The oscillator coils are quite large, especially the vertical antenna beat frequency coil. They have many hundreds of turns of rather fine wire wound very closely. This is needed so a very small capacitance change from waving your hand near the pitch antenna will give a substantial change in frequency.

Bruce Gentry, KA2IVY

On 4/12/20 8:57 PM, Ernesto wrote:
LOL, greenboxmaven

You could become a genius if your scheme leads to some higher order of Lissajous curves modulated by the beating frequency.
For RCA the "instrument for everyone" should have been the radio and the turntable.
After one hour one can play a decent tune on a piano. And after years, one can make good music with an older proximity instrument, the proximity of the finger to the bridge in the violin.
I wonder what makes the coils of the theremin so superhuman. Are they more difficult to wind than a Tektronix HV transformer?

Ernesto



Re: 155-XXXX-XX (Custom ICs) For Sale

Craig Cramb
 

want to buy a 155-0047-00

Larry,
Looks like you can obtain them on EBay.

Craig

On Apr 12, 2020, at 2:23 PM, larrydukate via groups.io <larrydukate=yahoo.com@groups.io> wrote:

want to buy a 155-0047-00


Re: Replacing hard drive with SSD

nonIonizing EMF
 

On Sun, Apr 12, 2020 at 03:32 PM, Bill Higdon wrote:


Has anyone had success in replacing the old IDE hard drives in the TDS series
with SSD's?
I have in the TDS8000 (or TDS8000B as I forget offhand and isn't in front of me) using the KingSpec 64GB IDE SSD. However, both units have PS issues clearly... and of course the one that did start up more than two or three times, didn't power on subsequently and I haven't prioritized time to work on yet. I don't have any modules, so not really going to be able to use until I can find or design.

I'm still early on in the learning curve in regards to designing a module unless anyone else wants to try or knows of someone who has. I also have wondered what some of the other Tektronix modules capabilities are in regards to making adapters. I still need to review the pinouts and range of values specified for designing and to see if there are any capabilities in using more cost effective existing options.

This is where I last left off: https://www.youtube.com/watch?v=jG3vnesqhAY (looks like the B model is the one I cloned and swapped the drive in).


Re: Replacing hard drive with SSD

amirb
 

have done this on agilent, tek, and rohde & schwarz equipment replacing HDD with either SSD or CF card

the important thing is the imaging software that you use, and I highly recommend https://hddguru.com/software/HDD-Raw-Copy-Tool/
has worked for me (i am on win 7) many times. I am sure other softwares do the job including the dd command in linux but this thing has served me well
other than that, you need an external USB to IDE and USB to SATA (the little device has both of them on it) adapter and a ATX power supply or equivalent

I always make an raw image file on my laptop and then transfer it to the new SSD or CF card (I mean dont do it on the fly)


Re: Music made to be visualized on a Scope!

 

LOL, greenboxmaven

You could become a genius if your scheme leads to some higher order of Lissajous curves modulated by the beating frequency.
For RCA the "instrument for everyone" should have been the radio and the turntable.
After one hour one can play a decent tune on a piano. And after years, one can make good music with an older proximity instrument, the proximity of the finger to the bridge in the violin.
I wonder what makes the coils of the theremin so superhuman. Are they more difficult to wind than a Tektronix HV transformer?

Ernesto


Re: Replacing hard drive with SSD

greenboxmaven
 

I remember seeing somone making or offering plans for a circuit board that used Compact Flash cards to replace an IDE hard drive. There were solid state replacements for PATA or IDE drives, you should be able to find one. One concern I have heard about solid state drives is otherworldly- they can sometimes be corrupted by cosmic rays. Mechanical hard drives seem to be quite robust in this regard. Newer computers and hand helds use built in error correction to minimize lost data or other malfunctions. Even then, occasional clean installs of operating systems are needed. As a part of the clean install, a disk utility checks for damaged memory cells and compensates if they are found.

Bruce Gentry, KA2IVY

On 4/12/20 7:36 PM, David Kuhn wrote:
Oops, my go to drive is a SATA not IDE. I do have small solid state IDE
drives, BUT it looks like the mother board in them has SATA sockets.
Tektronix offered a 050-3708-00 SATA upgrade kit for the scopes, at least
the "B" versions. I need to research this some more.

On Sun, Apr 12, 2020 at 6:32 PM Bill Higdon via groups.io <willard561=
aol.com@groups.io> wrote:

Has anyone had success in replacing the old IDE hard drives in the TDS
series with SSD's?

Thanks,
Bikk




Re: Replacing hard drive with SSD

ebayatessnh
 

Hi Bill,

I have not done it on a TDS series, but have on an HP oscilloscope. I used an IDE to mSATA adapter.

The SSD came with a program to copy an existing disk image to the SSD. I installed both disks into a Window computer, and ran the utility to copy the HP image to the new SSD.

Dave


Re: Music made to be visualized on a Scope!

greenboxmaven
 

It would be interesting to connect the two oscillators in a Theramin to the X and Y of a scope, and the audio to the Z axis. The Theramin was touted by RCA as an instrument for everyone, but it's price in the early 30s was too high for most people. I was able to play a barely recognizable tune on one after about an hour, getting really good at it takes years. Building a replica of the RCA is definately possible, but it takes almost superhuman patience to wind the coils.

Bruce Gentry, KA2IVY

On 4/12/20 5:50 PM, Ernesto wrote:
Hi Tony,

Are you into Musical Tektronix Scopes too?
I could try to make music with my 547 scope, sending the free running Sweep A output mixed with Sweep B output to a loudspeaker, and playing with the knobs to make a melody, maybe two of them in counterpoint.

If you finished making your Tesla coil, can you use it also to produce "electron" music?
Music like: ss...sss... schh...schh... chfzzz... chfzzz... ... PUFF!!.. BOOM!!

There is an electronic instrument that precedes the musical oscilloscope, and this is the THEREMIN. Watch this girl in "how the theremin changed the world", and, if you like it, it should not be too difficult to make.

https://www.youtube.com/watch?v=e3im1HUbPjE, and you can see how the theremin "does" Schubert: (it sounds a little more realistic than a Tektronix oscilloscope)

https://www.youtube.com/watch?list=RD5XP2ELxH0uQ&v=5XP2ELxH0uQ&feature=emb_rel_end

Ernesto



Re: Replacing hard drive with SSD

John Ferguson
 

I've been successful replacing SCSI drives on a 1993 Sun Microsystem SPARCSTATION 10 with a SCSI to MicroSD Card adapter. The difference between the rejected heat of the two 2 gig SCSI drives and that produced by that adapter and the MicroSD is astonishing and the cost savings is also pretty good.

The computer is completely fooled.  Something like this might work for you.


Re: Replacing hard drive with SSD

David Kuhn
 

Oops, my go to drive is a SATA not IDE. I do have small solid state IDE
drives, BUT it looks like the mother board in them has SATA sockets.
Tektronix offered a 050-3708-00 SATA upgrade kit for the scopes, at least
the "B" versions. I need to research this some more.

On Sun, Apr 12, 2020 at 6:32 PM Bill Higdon via groups.io <willard561=
aol.com@groups.io> wrote:

Has anyone had success in replacing the old IDE hard drives in the TDS
series with SSD's?

Thanks,
Bikk




Re: Replacing hard drive with SSD

David Kuhn
 

What would we have to do? Remove the old hard drive and image it with a
IDE to USB device and then put that image on the SSD? I plan to be doing
that. I don't know if a software image is still available to install on it
from scratch? My go-to SSD is the 500gb Samsung. ~$100. I assume that is
the one I will order, or a smaller one. I wouldn't think it would be that
difficult, but I would have to learn it. Hopefully, there is someone on
here, or EEVBLOG, that has instructions on how to replace the hard drives
and re-install the software.

On Sun, Apr 12, 2020 at 6:32 PM Bill Higdon via groups.io <willard561=
aol.com@groups.io> wrote:

Has anyone had success in replacing the old IDE hard drives in the TDS
series with SSD's?

Thanks,
Bikk




Replacing hard drive with SSD

Bill Higdon
 

Has anyone had success in replacing the old IDE hard drives in the TDS series with SSD's?

Thanks,
Bikk


Re: Tektronix 222 Repair

Mark Pilant
 

Hi Simone.

I have complete sets of the manuals for both the 222 and 224 I purchased
from Qservice Electronics in Greece.

No financial interest, but I have purchased a number of manuals and parts
from them for my various Tektronix scopes.

- Mark


Re: Music made to be visualized on a Scope!

 

Hi Tony,

Are you into Musical Tektronix Scopes too?
I could try to make music with my 547 scope, sending the free running Sweep A output mixed with Sweep B output to a loudspeaker, and playing with the knobs to make a melody, maybe two of them in counterpoint.

If you finished making your Tesla coil, can you use it also to produce "electron" music?
Music like: ss...sss... schh...schh... chfzzz... chfzzz... ... PUFF!!... BOOM!!

There is an electronic instrument that precedes the musical oscilloscope, and this is the THEREMIN. Watch this girl in "how the theremin changed the world", and, if you like it, it should not be too difficult to make.

https://www.youtube.com/watch?v=e3im1HUbPjE, and you can see how the theremin "does" Schubert: (it sounds a little more realistic than a Tektronix oscilloscope)

https://www.youtube.com/watch?list=RD5XP2ELxH0uQ&v=5XP2ELxH0uQ&feature=emb_rel_end

Ernesto


Re: Music made to be visualized on a Scope!

Tony Fleming
 

On Sun, Apr 12, 2020 at 3:34 PM Ernesto <ebordon@...> wrote:

This is cute! Maybe Tektronix could make plugins for the 500 series and
7000 series scopes that display "music" ?

Of course, music has nothing to do with this, it is simply some sounds
associated with files with X-Y pairs of values.
They say nothing about z-axis modulation, so the traces are written slowly
and it jumps from one to the other at the rise time limits of the scope.

Maybe something for my 8 year, 7 year and 1/2 year old grandchildren to
play. I think that for adults, it is better to keep music and scopes
separate, either studying some musical instrument or studying electronics
and computer science.




Re: Music made to be visualized on a Scope!

 

This is cute! Maybe Tektronix could make plugins for the 500 series and 7000 series scopes that display "music" ?

Of course, music has nothing to do with this, it is simply some sounds associated with files with X-Y pairs of values.
They say nothing about z-axis modulation, so the traces are written slowly and it jumps from one to the other at the rise time limits of the scope.

Maybe something for my 8 year, 7 year and 1/2 year old grandchildren to play. I think that for adults, it is better to keep music and scopes separate, either studying some musical instrument or studying electronics and computer science.


Re: Tektronix 222 Repair

John Gord
 

Simone,

Pin 14 on the TL594 is VREF, listed on the data sheet as 5v. The two pins are tied together, so those pins are probably OK.

<<http://w140.com/tekwiki/images/d/d6/Tek_222_Component_Level_Service.pdf>> might have more accurate schematics for the 222.

--John Gord

On Sun, Apr 12, 2020 at 12:23 PM, <simonev92@...> wrote:


Hi All!
I have a Tektronix 222 scope that doesn't work. It won't startup.
Battery is dead so I'm powering it with the external jack with a bench supply
set to 14V.
When I apply power the Trigger led blink for a second and I can hear a "beep",
after that nothing happens. Doing some test on the Power Supply Board (A4)
I've found that the power FETs that drives the main transformer becomes very
hot (the unit in this state draws about 12W of power so there's something
wrong).
After some tests I've isolated the 120V line after the transformer, now the
scope draws less power and the FETs stays cool but I can't make it work.
I'm using the 222A service manual which include boards schematics, they are
not exactly the same but pretty similar:
https://www.eserviceinfo.com/download.php?downloadstart=1&fileid=70093
In the troubleshooting procedure guide I've read that the pin 13 and 14 on the
TL594 on the Power supply board should stay near 0V in normal operation, on
mine they always stays at about +5V.
I think taht something isn't working properly on the power supply board but I
can't find what.
Do you have any idea? Any help will be appreciated!
Thank all!
Simone


Re: Rough Shape Oscilloscopes

Gary Robert Bosworth
 

Because there are numerous harmful materials in the electronic equipment,
most companies must dispose of equipment (used or otherwise) through
licensed disposal services.

On Sat, Apr 11, 2020, 20:42 stevenhorii <sonodocsch@...> wrote:

Bill,

I have seen a transition. I work at a major academic medical center. They
used to have a policy of letting employees take home computers that were
working but out of their current specifications. They pulled the hard
drives so no PHI was left in the machine. Now, they won't even let someone
take a computer for their own use even if the hard drives are pulled. When
I asked why, or why they could not be donated to another organization that
could use them, they just answered that it was a new policy. I know the
folks in IT and they have let me take machines for my own use after they
pulled the drives and removed the property tags. I refurbed them, installed
a hard drive and OS and gave them to folks who could not afford a machine.
They have let me take other stuff - there was a surgical microscope that
was sitting outside the OR with a "discard - non-repairable" tag on it.
They said I could have it as long as it did not come back. It turned out
that the fiber optic illuminator was bad - just a bad variable transformer
in it. The company repair guy had told them he could not get the part. The
microscope was perfectly fine. I wound up swapping it to a surplus dealer
for some test equipment (a nice HP counter and some Tek 7000-series
plug-ins). There is an awful lot of stuff that just goes out in the
dumpster, though there are separate bins now for "e-waste". Some
universities have property disposal sales offices. I went to one at
Stanford (though this was years ago). They had a couple of Tek scopes, but
at the time, I had more of the 500-series than I hsd space for and shipping
would have been more than they were asking for them, so I didn't buy them.
The one thing I should have bought was an Imsai computer. Fully-loaded and
working. They were asking $100. Just do a search on eBay and see what they
sell for now.

Steve H

On Sat, Apr 11, 2020 at 11:14 PM william_b_noble <william_b_noble@...>
wrote:

Your point about discards is right on. And, sadly, in many companies,
policy forbids employees from buying surplus or even bidding at surplus
auctions, so you can watch the valuable stuff leave but you can't do
anything about it to save it or even to redirect it to an organization
that
needs it. Presumably this is to prevent fraud. Not sure it's worth it
though

Regards, Bill Noble
www.wbnoble.com<http://www.wbnoble.com/>







Re: 155-XXXX-XX (Custom ICs) For Sale

larrydukate@...
 

I want to buy a 155-0047-00 how do I go about it?
Thanks,
Larry