开云体育

Hi there,

in between I reworked my online museum.
All visitors are welcome again at .

You'll find there some service documents about Tek instruments. Maybe someone
(Stan ?!) can check for errors or so. I also have a large assortment
of spare parts (like the 556 final tubes) - but remember: I'm located in Germany.

I will not comment any replys as I'm on buisness trip for the next two weeks.

If someone has interesting material which should be published for all of us,
please let me know if you have no possibility for an own homepage.

-------------------------------------------------------------------------------------------------------------
To Stan:

Did you remember all the stuff about the 551/555 interconnection cable?
Do you have any backups? It would be a great help for me - otherwise
I have to check the whole stuff once more.
-------------------------------------------------------------------------------------------------------------

There is a friend of mine (who will also get this message) who obtains
an online Tek-only museum too. At the moment he scanned some of
his and mine Tek catalogs, and I will convert them to pdf files.
If the stuff is available on CD-ROM we'll let you know.

Check his collection at

That's all for now. Have a good electron glow!

Stefan

Hi again, :)

Sometime on Fri, 06 Oct 2000, you wrote:

-Michael wrote:

-> I second that. But I don't think I've ever seen one for sale... I wanted
-> to buy the one I was working with, and Peter wouldn't sell it to me...

-If you really want a 453, you can find them for sale of eBay and in various
-classified ads for used test equipment. Not everything on eBay sells for
-outrageous prices . . .
-Stan

I guess you're right. But I've just shelled out $600 for an "as new" 7603
(actually it was cheap!) (and it was "as new" until the post office broke
it...) and don't have any more "big" money left right now.

But later on, I will be looking out for a 453. :)

What I *would* like right now are some calibration standards...

Cheers,
:)
Michael

--

Michael VK2XMD 0404-478-205
I used to have a handle on life, but it broke ...

Sometime on Fri, 06 Oct 2000, you wrote:

-is now working somewhat - there are some triggering and offset
-problems. But, with the right settings and input, I can get a valid
-trace!!! Whether these probs are a result of the Schottkys, I don't
-yet know. All I can say is, it's VERY cool to scroll over a 200MHz
-waveform at 35ps/div! (yes, 35ps. 0.035ns!) Though a bit useless,
-as the risetime of the thing is *only* about 300ps...

Congratulations!
:)
Michael

Yoohoo. I'm making progress repairing my 1S1 1GHz sampling plug-in. The biggest problem was a kaput power supply filter cap - totally dead - well, many, many kohms ESR. Replaced the big old can with a part about 1/6 the volume, yet almost twice the capacitance, and much better quality to boot! Semiconductors aren't the only technology that's improved in the last 35 years!

Also paralleled the smaller final power supply output stability caps with new ones, again much smaller, yet more C's!

As for the six missing GaAs diodes in the sampling bridge and elsewhere, I got some SMT Schottky diodes as hopeful subs. The unit is now working somewhat - there are some triggering and offset problems. But, with the right settings and input, I can get a valid trace!!! Whether these probs are a result of the Schottkys, I don't yet know. All I can say is, it's VERY cool to scroll over a 200MHz waveform at 35ps/div! (yes, 35ps. 0.035ns!) Though a bit useless, as the risetime of the thing is *only* about 300ps...

Michael wrote:

Hello, :)

Sometime on Mon, 02 Oct 2000, you wrote:

And in my mind the 485 would have to be a classic also... Now if there's any
thing I'd like *more* than a 453, it would be a 485. All the style of the 453,
and 350MHz! Yes!

But of course.... If I had a 453, it would not be for sale... :)

I second that. But I don't think I've ever seen one for sale... I wanted to
buy the one I was working with, and Peter wouldn't sell it to me... >sigh<.

Cheers,
:)
Michael

To unsubscribe from this group, send an email to:
TekScopes-unsubscribe@...

If you really want a 453, you can find them for sale of eBay and in various
classified ads for used test equipment. Not everything on eBay sells for
outrageous prices . . .

Stan
w7ni@...

Hi all,

I have just taken delivery of a 7603, and in transit, the intensity/readout
controls were damaged. It needs a new ganged pot and concentric knobs.

Can anyone recommend a supplier who takes Amex?

Thanks and regards,
:)
Michael


--

Michael VK2XMD 0404-478-205
I used to have a handle on life, but it broke ...

Hi. Does anyone have any 8608 tubes? (med power pentodes with plate cap, used for vertical deflection on some Tek scopes (eg, 556, 549))

I'm willing to pay a reasonable amount for 1 or several, but not an exorbitant price.

-----------------------------------------------------------------
Michael Dunn | Surround Sound Decoder & Stereo Enhancement
Cantares | Self-Amplified Speakers, Test Equipment
74 George St. | Ambisonic Surround Sound CDs and Recording
Waterloo, Ont. | (519) 744-9395 (fax: 744-7129)
N2J 1K7 | mdunn@...
Canada |
-----------------------------------------------------------------

hi,

we have a lot of tek parts and tubes, CRT's etc. for 5000/7000 and
some 400 series units. you can browse through what's sorted and on
line at:



To help with repairs, there is also a CRT cross reference, and tek
part number to JEDEC cross reference for many 1N/2N and IC parts. In
the tube section, we do have some tek special tubes, selected by
whatever mysterious criteria they thought was important, as well as
some commonly needed Tek tubes like 7119's etc. for the generators,
and some nuvistors for the older 400 series scopes.

sadly, we can't be much help with older tube 500 series scopes,
except for CRT's and some miniature HV rectifier tubes, and 6080's.
we also have the tek cross reference data to 1984 for semis, and can
help with some items not listed on oline for cross-reference data,
but these requests are done as we have time, so be patient. In the
NEW ARRIVALS section, we also just got dozens of Tek precision
capacitor kits for time bases and generators, if you need them.

I will add a link to this mail list into the Tek section later this
month as well. Anybody in Canada may also be interested in the fact
we will be moving shortly, and will have a lot of older Tek scrap we
have to get rid of. shipping is reasonable within Canada for that
kind of stuff, so might be useful to somebody.

all the best,
walter walter2@...

Sometime on Tue, 03 Oct 2000, I wrote:

I second that. But I don't think I've ever seen one for sale... I wanted to
buy the one I was working with, and Peter wouldn't sell it to me... >sigh<.

...And having just said that, I just found one at:

--- $200.

No, I'm not going for it, with the echange rate what it is.

Cheers,
:)
Michael

Hello, :)

Sometime on Mon, 02 Oct 2000, you wrote:

And in my mind the 485 would have to be a classic also... Now if there's any
thing I'd like *more* than a 453, it would be a 485. All the style of the 453,
and 350MHz! Yes!

But of course.... If I had a 453, it would not be for sale... :)

I second that. But I don't think I've ever seen one for sale... I wanted to
buy the one I was working with, and Peter wouldn't sell it to me... >sigh<.

Cheers,
:)
Michael

About the 453....

'Great' is said with a wink to size and weight... The 453 is not a 'great'
scope. :)

Secondly, I specifically did not want to include transistorized Tek scopes
in the museum because the interest in those is even larger than the interest
in the tube scopes. Doing a question-and-answer session with all the
thousands of happy users of 5000, 7000, 453, 454, 465, 475, 485 users around
the world is not what I set out to do...

But of course.... If I had a 453, it would not be for sale... :)

Regards,

Arnoud.

I was there when the 453 was introduced to the world. No doubt about it . . . it
was revolutionary. You have to put it in the context of the other instruments
available on the market at the time. Nothing could touch it. IBM was certainly
in love with it . . .

Stan
w7ni@...

Michael wrote:

Hi again all... :)

Sometime on Mon, 02 Oct 2000, you wrote:

margo.student.utwente.nl has the IP address 130.89.221.72

FOUND IT!!!

Thanks for that. Looks like it was a nameserver problem after all... Great
pages, but I take issue with your comment that the 453 "doesn't belong in the
list of the great tek scopes..." The 453 was my scope of choice as soon as I
could get my hands on it! And the first thing I did was throw away the mesh
filter and fit a blue one. Lovely! :)

In my mind, the 453 is the "classic portable" oscilloscope.

Cheers,
:)
Michael

Hi Michael,

margo.student.utwente.nl has the IP address 130.89.221.72

and if that works, then I probably know what went wrong: the IP address used
to be different, and maybe changes haven't filtered around to the other side
of the world yet..


Regards,

Arnoud.

Sometime on Sun, 01 Oct 2000, you wrote:

I already wrote one book about Tek scopes: "OSCILLOSCOPES--Selecting and
Restoring a Classic". There is more about this on the web page at
<>. My first book, published in 1992, covered Tek scopes
and plugins from 1947 (the beginning) to the end of 1969. The second volume
(under construction for several years now) will cover the scopes and plugins
introduced by Tek in the decade of the 70's. I still have a couple of hundred
copies of the first book if you find it interesting after you read the review of
it on the web page.

That's one book I will be ordering, when I can afford it. (and when the $A/$US
exchange rate is a little more favourable...)

Cheers,
:)
Michael

Hiya Stan, :)

Sometime on Sun, 01 Oct 2000, you wrote:

I may be all wet here but I think your server has to know about the URL you wish to
go to or it won't let you go there. Maybe your server just does not recognize the
web address you are trying to reach. As I understand it, when a new URL comes on
board, the owner has to let the world (internet) know about it so the various
servers of the world can recongnize and find it. The servers are constantly
updating their database of valid URL's and maybe the one you are looking for never
got into your server's database. If not, your server could not find it, but
others still could . . .

But I may be completely off base on this one. It makes sense to me . . .

Hmmm... I'm not prepared to say you're wrong, but I'm not certain you're right
either. I just don't really know. Either way, it's a pity, as I'd like to see
the site. Oh well... Never mind.

Cheers,
:)
Michael

Hiya Arnoud,

I'm not gonna give up... <g>

Can you supply me with the ip address of margo.student.utwente.nl ? (there's
more than one way to do almost anything... :)

Cheers,
:)
Michael

--

Michael VK2XMD 0404-478-205
I used to have a handle on life, but it broke ...

HI Michael,

I already wrote one book about Tek scopes: "OSCILLOSCOPES--Selecting and
Restoring a Classic". There is more about this on the web page at
<>. My first book, published in 1992, covered Tek scopes
and plugins from 1947 (the beginning) to the end of 1969. The second volume
(under construction for several years now) will cover the scopes and plugins
introduced by Tek in the decade of the 70's. I still have a couple of hundred
copies of the first book if you find it interesting after you read the review of
it on the web page.

Tube with part numbers beginning with "157-" are checked for various parameters.
Some are matched for gm. Some are checked for grid current or microphonics.
There are other parameters they are checked for as well. And, yes, I almost hate
to say it, I know what those parameters are. The reason I hate to say it is that
if it were generally known that I know this stuff, I would be buried under
requests for the info . . . I just don't have the time to handle the requests.
The plan was to publish a database with checked tube part numbers and the
parameters they are checked for but so far, there just has not been time to do
it. Believe it or not, there are a couple of other even more important databases
to publish if we have time for them, like a cross reference from "152-" (diode)
part numbers to generic (1N) diode numbers. There are also checked transistors
and diodes ("153-") part numbers and we could do a database on those too. There
is literally TONS of good data to be published. I could very easily spend the
rest of my life doing this . . . and that is not really a bad idea as I am sure
there are a lot of guys and gals out there who would appreciate and use the data.

So . . . if you need some specific data about one particular "157" part number, I
might find the time to look it up for you . . . let me know.

Stan
w7ni@...

Hi Michael,

I may be all wet here but I think your server has to know about the URL you wish to
go to or it won't let you go there. Maybe your server just does not recognize the
web address you are trying to reach. As I understand it, when a new URL comes on
board, the owner has to let the world (internet) know about it so the various
servers of the world can recongnize and find it. The servers are constantly
updating their database of valid URL's and maybe the one you are looking for never
got into your server's database. If not, your server could not find it, but
others still could . . .

But I may be completely off base on this one. It makes sense to me . . .

Stan
w7ni@...

Michael Dunn wrote:

My on-line tech museum is still a ways off, but y'all may be interested in eyeing a couple of pics I've taken with my new digicam! Go to:



The Tek pix are clearly named. BTW, the close-up is of a 1A1 2-chan input.

Michael