Date   
Re: Tek 2215

Malcolm Hunter
 

It looks like links to 3 different photos sent in 3 emails. In the 2nd and
3rd emails, Yahoo has done its magic and doubled up the URLs.

Malcolm

On 3 February 2016 at 04:52, 'Brian' brianclarke01@...
[TekScopes] <TekScopes@...> wrote:



Hello Jason,
Perhaps you are unaware that you have sent the link for each photo four
times in each of two identical messages.
I’ve left one of your messages attached so you can see.
73 de Brian, VK2GCE.

On Wednesday, February 03, 2016 3:33 AM, you sent:

Here are the pics of the scope as requested

http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135820_zps1bizbipb.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135820_zps1bizbipb.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135820_zps1bizbipb.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135820_zps1bizbipb.jpg.html

http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135837_zpsewy2peij.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135837_zpsewy2peij.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135837_zpsewy2peij.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135837_zpsewy2peij.jpg.html

http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135828_zpsgscrxoml.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135828_zpsgscrxoml.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135828_zpsgscrxoml.jpg.html
http://s87.photobucket.com/user/nucklehead_2006/media/20160201_135828_zpsgscrxoml.jpg.html

[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]

Re: Tek 2215

Brian <brianclarke01@...>
 

Re: Tek 2430A hybrid compatiblity.

 

You may need to do the CCD calibration to get the noise level down. It
should not require any of the noise-reduction options for a clean
display.

On 02 Feb 2016 13:47:24 -0800, you wrote:

...

The scope is still showing some trigger and signal noise/jitter at 10MHz and above, but that may be normal for this scope. It seems to have lots of smoothing, averaging and noise-reduction options and I may not have found the right combination yet.

Re: Tek 2215

 

That document applies if you ignore the first part about the
preregulator circuit and start at the paragraph which discusses the
inverter.

On 02 Feb 2016 18:06:17 -0800, you wrote:

I found this and what to know if this possible and safe to scope ??http://www.hakanh.com/dl/docs/troubleshooting_tips_on_2200_ps.pdf

Re: PG 506 DC-out switch

Sergey Kubushyn
 

On Tue, 2 Feb 2016, Tom Jobe tomjobe@... [TekScopes] wrote:

That doesn't look like something done at the factory to me... Sure I might
be wrong but it looks more like quick'n'dirty hack not very well executed.

Tektronix part number on a switch means absolutely nothing. E.g. I do have
something like 50 different 7xxx and 5xxx plugins that I'm periodically pull
some parts from to either bring those few I really use to "like new"
condition (i.e. I cherry pick pots from similar plugins to replace noisy
ones in a plugin picked to be my own working one) or for building various
one-off fixtures and other things.

Giving up "Period" light makes no good at all. Especially when it is
replaced with a protruding piece of plastic of unknown purpose.

Many of TM500 plugins have some kind of rarely used switches not on the
front panel so they require pulling the plugin, opening it, flipping a
switch and putting it back. SG504 is another example beyond PG506. There
are similar controls in 7xxx plugins -- look at e.g. 7A13 that has
screwdriver-operated Rin switch on the left side (and indicator light for
its setting on the front panel :))

Hi Raymond,
Thank you for your photos of this PG 506 modification, it looks to me
like it might have even been done at the factory.
It's interesting that it only brings the functionality of switch S660
out to the front, but others commented on how that functionality is
needed in a common scope calibration routine many of us might be doing
by using switch S660 (now that we know about it).
I'm glad you brought this modification up, it helps us all understand
the the PG506 a little better.
tom jobe...


On 2/2/2016 9:40 AM, @Raymond [TekScopes] wrote:

David, Sergey, Tom,
Your questions may be answered by having a look at the album I just
created, named
PG 506 AC - DC Switch on Front Panel.

Notes to photos:

- The switch (visibly marked 260-1453-00), is soldered to the
underlying PCB, a solution that seems stable enough but I wouldn't
call it really professional.
- The red/orange on white wires go to S660, the module-internal AC -
DC switch.

Raymond
---
******************************************************************
* KSI@home KOI8 Net < > The impossible we do immediately. *
* Las Vegas NV, USA < > Miracles require 24-hour notice. *
******************************************************************

Re: Tek 2215

Tothwolf
 

On Tue, 2 Feb 2016, jasontucker70@... [TekScopes] wrote:

I understand the evolment in the power supply upgrade.. Does anyone know the output voltages and current of the power supply upgrade pcb cause I was was thinking about maybe making my very own ps pcb... I have read tgey both have their problems and my ps have alot of caps in the stock configuration and not sure whether to leave stock and install the transitor and trigger mods or upgrade everything????
What do you guys think ??
Personally, I wouldn't bother trying to swap a current limiter setup over to a preregulator. I would rebuild/repair the scope as-is and if I specifically wanted a preregulator scope, I'd look for one already configured that way. To date I've actively avoided 2213/2215 scopes which use the current limiter setup, even when they have been really cheap. You can tell them from the later preregulator versions based on the serial number and if they have a permanently attached power cord. I'm starting to think I probably should have bought one though just so I could have worked up a parts list.

Re: Tek 2215

Tothwolf
 

On Tue, 2 Feb 2016, David @DWH [TekScopes] wrote:
On Mon, 1 Feb 2016 21:40:50 -0600 (CST), you wrote:

Because of the different power supply, some of the parts for your 2215 are going to be different from what I sourced for my 2213 scopes. About 2/3 of it will be the same so I'll see about compiling a list from my various spreadsheets. When I repaired my 2213 scopes, I used Nichicon HE series parts for the secondary filter capacitors. If I were going to source parts today, I might consider using PM series instead for some of them since the physically larger PM parts would probably have a higher ripple current rating.
When using a physically smaller series of aluminum electrolytic capacitors, some or all of the size difference contributing to a lower ripple current rating can be made up for by using a higher voltage part which will be physically larger. This works up to about 100 volts because at about 160 volts, the electrolyte will be different and there is a jump to a higher ESR and lower ripple current rating.
Right, this is what I found when researching replacement parts for the power supply for my 2465B project scope. Tektronix used a variety of capacitors for that power supply based on what seems to have been market availability from several manufacturers but they were all low ESR type parts. I eventually settled on Nichicon PM series parts which are low ESR and also met or exceeded the ripple current rating of the original parts. I couldn't find parts in the more common PW, HE, or HD series which would meet all the specs.

Re: PG 506 DC-out switch

Tom Jobe <tomjobe@...>
 

Hi Raymond,
Thank you for your photos of this PG 506 modification, it looks to me
like it might have even been done at the factory.
It's interesting that it only brings the functionality of switch S660
out to the front, but others commented on how that functionality is
needed in a common scope calibration routine many of us might be doing
by using switch S660 (now that we know about it).
I'm glad you brought this modification up, it helps us all understand
the the PG506 a little better.
tom jobe...




On 2/2/2016 9:40 AM, @Raymond [TekScopes] wrote:

David, Sergey, Tom,
Your questions may be answered by having a look at the album I just
created, named
PG 506 AC - DC Switch on Front Panel.

Notes to photos:

- The switch (visibly marked 260-1453-00), is soldered to the
underlying PCB, a solution that seems stable enough but I wouldn't
call it really professional.
- The red/orange on white wires go to S660, the module-internal AC -
DC switch.

Raymond

[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]

Re: 2213 Power Supply

Jay
 

The easy way to tell is to check the power supply side.. If it's filled with parts then its current limited and if its empty the its preregulated..
I am trying use a modded power supply for my scope.

Re: Tek 2215

Jay
 

I found this and what to know if this possible and safe to scope ??http://www.hakanh.com/dl/docs/troubleshooting_tips_on_2200_ps.pdf

Re: Happy 70th Birthday

Dave Daniel
 

Another thing to remember is that the technology involved in
state-of-the-art products often is cutting-edge (okay, two buzzwords in
one sentence - sorry). Look at the current IO standards. Fibre Channel
is pushing 32 GHz, Infiniband is at 25.8 GHz, PCI-Express Gen 4 is at 16
GHz and SAS 3 is at 12 GHz. The T & M companies are faced with offering
instruments that can be used to analyze and troubleshoot technology that
is as fast as it can be. Somehow they need to be able to build
instruments that "go faster" than the fastest stuff currently around,
which is hugely expensive as far as R & D costs are concerned, and the
resulting instruments cost more than a decent home. Measurements in the
frequency domain are a little easier, but sometimes one needs to look
using the time domain, which is much harder at these frequencies,
technologically speaking. It's no wonder that the business is a
difficult one. The higher the frequency of the signals in the products,
the more difficult it is to build instruments where the size of the
physical structures in the instruments approach the wavelength of the
signals under test and everything is an antenna of one sort or another.
IC technology is pushing 14 nm line widths, with research going on into
10 nm. While it's true that this has always been the case, when the
technology was 50 MHz, at least one could build an instrument that
wasn't a package of pesky antennas at the frequencies of interest.

DaveD

On 2/2/2016 5:13 PM, ctconger@... [TekScopes] wrote:

The DMM technology was first licensed to Fluke then the whole product
line was sold. It was hard to compete with such an establish leader in
DMM's though they were pretty good. Interestingly, I understand for a
while Fluke DMM's , at least the high end handhelds, had chips in them
that said TEK. More interesting yet is the fact that Danaher owns
Fluke as well as Keithly as well as a number of other well known brands.

HP is not the same as Agilent at least after few years after the
transition.Carly Fiorina (recognize that name) spun off the
measurement division in late 1999 as I recall. She did this because
they did not make enough money. She also then ran hp , the computer
division that acquired Compaq Computer, into the ground.


It took Agilent a long time to recover to their former stature and in
the end made very good products.


Then around late Oct 2014 Agilent did the same thing Carly did they
spun off the instruments division to be called Keysight. They did this
for the same reason, Test and Measurement instruments don't make
enough money.
Agilent remains and makes their scientific instruments. they seem to
be very focused judging by the number of webinars they offer! Don't
know about the instruments but I would guess they are very good.


Similarly Danaher formed a subsidiary from most of TEK and the other
electronic instrument products into a company called Tektronix (no
name change). I am not sure if this has fully happen as of yet but
presumably it was for the same reason low profits. It also enables
them to sell just that portion of the company more easily.


So it is possible that TEK may someday free of the Danaher influence.


BTW Danaher is an excellent company a great stock to own for
shareholders. Just Google DHR and look what their stock prices have
done over the last ten years. Few companies can match their
performance and they have remarkable stability for single company.


The bottom line is test and measurement companies like TEK, Lecroy,
Keysight, etc just don't make that much money. Most of these have net
margins in the high single digit territory.It is very expensive to
develop new products and some sell only in the hundreds of units per
year.So while the prices seem very high in reality they are not
screwing anybody.



[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]

Re: 2213 Power Supply

Thad Larson <highwayman_33402@...>
 

I am pretty sure that my Tek 2213 is without the pre-regulator.  It does indeed have the current limiter board.
I stuck a picture in the files section:  TEK 2213 SN-B014.JPGThe current limiter previously had a bad MOSFET.  That is why I have it out.  Figured I would place it on the CRT tube for the picture.
Thad

[Non-text portions of this message have been removed]

Re: Happy 70th Birthday

Charlie Conger
 

The DMM technology was first licensed to Fluke then the whole product line was sold. It was hard to compete with such an establish leader in DMM's though they were pretty good. Interestingly, I understand for a while Fluke DMM's , at least the high end handhelds, had chips in them that said TEK. More interesting yet is the fact that Danaher owns Fluke as well as Keithly as well as a number of other well known brands.

HP is not the same as Agilent at least after few years after the transition.Carly Fiorina (recognize that name) spun off the measurement division in late 1999 as I recall. She did this because they did not make enough money. She also then ran hp , the computer division that acquired Compaq Computer, into the ground.


It took Agilent a long time to recover to their former stature and in the end made very good products.


Then around late Oct 2014 Agilent did the same thing Carly did they spun off the instruments division to be called Keysight. They did this for the same reason, Test and Measurement instruments don't make enough money.
Agilent remains and makes their scientific instruments. they seem to be very focused judging by the number of webinars they offer! Don't know about the instruments but I would guess they are very good.


Similarly Danaher formed a subsidiary from most of TEK and the other electronic instrument products into a company called Tektronix (no name change). I am not sure if this has fully happen as of yet but presumably it was for the same reason low profits. It also enables them to sell just that portion of the company more easily.


So it is possible that TEK may someday free of the Danaher influence.


BTW Danaher is an excellent company a great stock to own for shareholders. Just Google DHR and look what their stock prices have done over the last ten years. Few companies can match their performance and they have remarkable stability for single company.


The bottom line is test and measurement companies like TEK, Lecroy, Keysight, etc just don't make that much money. Most of these have net margins in the high single digit territory.It is very expensive to develop new products and some sell only in the hundreds of units per year.So while the prices seem very high in reality they are not screwing anybody.

Re: Tek 2215

Jay
 

The issue comes as that most of the caps are used in the origional ps and the preregulator setup has alot less caps and parts ..The service manual has the schematic and parts list but trying to figure out if it's worth buy all the parts for the upgrade or just rebuild ??? Also what is the difference between a service manual and Operations instruction manual ???

Re: 2246 locked up

sidthepop@...
 

And now, after leaving it on for ten minutes, it's developed amnesia again.....
So close, but yet so far

Re: Tek 2215

 

This can definitely be done and may even be preferable; just drive the
inverter across C937 with about 42.5 volts. In practice you will want
to adjust the voltage to a point above where Q940 and Q942 dropout but
that is easy enough to do. I would probably raise the voltage until
the bases of Q948 and Q954 are equal showing that it is barely
regulating, and then raise the voltage another 3 volts or so.

The specifications for the oscilloscope say it draws a maximum of 50
watts so assuming 85% efficient for the preregulator, the inverter
will be drawing about 1 amp. Naturally you will want to use a power
supply with a higher power rating.

Maybe something like one of these 1.6 amp supplies with a voltage
adjustment range of 42 to 54 volts assuming it will fit:

http://www.mouser.com/ProductDetail/Mean-Well/LRS-75-48/?qs=sGAEpiMZZMsPs3th5F8koMf%2fa2V0paI9itnMUV014SIfnc4CbtW0pg%3d%3d
http://www.mouser.com/ProductDetail/Mean-Well/RS-75-48/?qs=sGAEpiMZZMsPs3th5F8koAOKs67AukcKh8iUFuyWgv4%3d
http://www.mouser.com/ProductDetail/TDK-Lambda/LS75-48/?qs=sGAEpiMZZMsPs3th5F8koGu8EUi%252bGg%252brgbtQzGPHfsQ%3d

I would change all of the aluminum electrolytics capacitors no matter
what course you decide to take.

On 02 Feb 2016 13:46:14 -0800, you wrote:

I understand the evolment in the power supply upgrade.. Does anyone know the output voltages and current of the power supply upgrade pcb cause I was was thinking about maybe making my very own ps pcb... I have read tgey both have their problems and my ps have alot of caps in the stock configuration and not sure whether to leave stock and install the transitor and trigger mods or upgrade everything????
What do you guys think ??

Re: Happy 70th Birthday

 

I liked their DMM916 series (except for the useless backlight) but I
guess a gentleman's agreement and machinations with Fluke resulted in
them being dropped. Someone here mentioned it on the list but I was
not able to find the post. I would not mind hearing more about what
happened with that.

On Tue, 2 Feb 2016 21:25:19 +0100, you wrote:

Their Truevolt DMMs are quite good, almost back to 34410 / 34401
standards I would say. Maybe not quite as robust but useful features
and good performance. Nothing like the 34405 nonsense.

...

Re: Happy 70th Birthday

Charlie Conger
 

The low end R&S models are rebadged Hamegs. I think R&S bought them so maybe rebadged is not exactly accurate.

Re: Happy 70th Birthday

Marian B
 

Well, a dark display has zero uncertainty and no calibration required.
That's really something!

Cheers, Marian

On 02.02.2016 23:12, Stefan Trethan stefan_trethan@... [TekScopes] wrote:
No, you misunderstood.
It's five half digits, since only half of them work, not five and a half.

I even got the special version with zero digits, dark display, brand
new out of the box.

ST

On Tue, Feb 2, 2016 at 9:54 PM, public@... [TekScopes] <
They actually tried to sell a 120 000 count DMM as "5 1/2 digit"?
I'm almost surprised no one in the US sued them for false advertising or
something similar.

Cheers, Marian

Re: Happy 70th Birthday

stefan_trethan
 

No, you misunderstood.
It's five half digits, since only half of them work, not five and a half.

I even got the special version with zero digits, dark display, brand
new out of the box.

ST

On Tue, Feb 2, 2016 at 9:54 PM, public@... [TekScopes] <

They actually tried to sell a 120 000 count DMM as "5 1/2 digit"?
I'm almost surprised no one in the US sued them for false advertising or
something similar.

Cheers, Marian


------------------------------------
Posted by: public@...
------------------------------------


------------------------------------

Yahoo Groups Links