开云体育

Hi Doug,

There is a photo of a T912 on ebay at:



The style is similar on all the T900 scopes. Blue plastic case, tube to
upper right and controls at left and below. My foggy memory says the T912
was the lowest cost one in the line and was a single channel, therefore I
wonder if the scope pictured is actually a T922. This is a question I bet
Stan could clear up in a heartbeat. I'm getting out on a limb here but I
recollect the T92x was a 20MHz scope and the T935 was the top of the line at
35MHz, dual channel and might have had delayed sweep, too. There was also a
storage scope in the middle there somewhere (10MHz BW?).

T900 was definitely a Beaverton product. Look close and you can see
components similar to the other scopes. After my stint in DSI/portable
scopes, I moved to Tek Labs where I came across both early production and
also some engineering boards for the T935. That was in Bldg 50, so I assume
that the scope line was either designed in 50 or perhaps the eval team which
followed it was in 50. I almost had enough parts scrounged to build one but
with the impatience of youth, I gave them away to another Tek employee. I'm
not sure whether he ever got it all together....

Telequipment was an entity unto themselves as far as the product line was
concerned, not having any connection with Beaverton in design or parts
sourcing. We had a bunch of them at the local community college and they
were ok, but no Tek 500 series, which we also had access to. For trivia
buffs out there, a Telequipment scope features prominently in the cockpit of
the Zero-X spacecraft in Gerry and Sylvia Anderson's "Thunderbirds are Go"
movie, which was British made.

Don




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



Your use of Yahoo! Groups is subject to

At 01:20 PM 8/6/2001 -0700, you wrote:

I find Don's story fascinating.

To start with, until very recently I thought that 465M is a 465, in a funny
housing, but still 465. I never new that 465M traces lineage to T900.

That's what I thought too. That was an informative post.

I
believe that T900 were products acquired when Tektronix bought (British ?)

It was "Telequipment" from the UK

Tecelec; anyone, please, correct me if I am wrong on Tektronix/Tecelec
transaction. I have seen same housing and controls with both, Tecelec and
Sales guy complained how Air Force bought scopes from Kikutsi,
because of low price, while Kikutsi

Kikisui ??

Phil

Regards

Miroslav Pokorni



-----Original Message-----
From: donlcramer@... [mailto:donlcramer@...]
Sent: Sunday, August 05, 2001 2:49 PM
To: TekScopes@...
Subject: Re: [TekScopes] Re: 465M Flaky vertical
height.

Fascinating!

BTW, what was the reason for creating the 465M for the
government vs selling
the 465? Was it a cost issue? Or some special features?
Was the 455 an
outgrowth of the 465M or was it the other way around?

I worked in Digital Service Instruments as a production tech
in the late 70s,
which was a new group in Portables which began with the 851
Digital Tester.
This was a product designed originally for Burroughs for
their first line
techs as a scope replacement. The instrument was
principally a clever
integration of DMM and counter/timer functions and the idea
was that a tech
could follow a diagnostic tree and compare readings to
arrive at the fault,
without the need to be familiar with how a scope worked.
Anyway, we were
next to the T900 line and if DSI production was a bit slow,
I would get to
work on T900 product. While not as nice as the "real"
portables, the top
line T935 wasn't a bad instrument (2x35MHz) as far as
functionality was
concerned.

About once a month our group got to either take a tour of
another area, or
had a guest in, as was common practice back then in order to
get more
familiar with other parts of Tek. One time it was the the
marketing product
manager for T900. As you know, the T900 line styling was a
little odd, and
was derided for looking like an old Kerby cannister vacuum
cleaner instead of
like a traditional portable scope. The gentleman, whose
name I've long since
forgotten, was quite a character. He told us he wanted to
do an ad with a
photo of a field service tech holding a T900 in one hand and
a vacuum cleaner
hose in the other hand with the line "Tektronix is Going to
Clean Up in the
Low Cost Scope Business". But the idea was shot down. We
had quite a laugh
over that, and he was an inspiration for the T900 team who
felt somewhat
second rate compared to the groups working on the more
expensive portables
and lab scopes. My recollection is that were a great bunch
of people
regardless of what they worked on.

Don







------------------------ Yahoo! Groups Sponsor

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



Your use of Yahoo! Groups is subject to




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



Your use of Yahoo! Groups is subject to

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



Your use of Yahoo! Groups is subject to

----- Original Message -----
From: <nfeinc@...>
To: <TekScopes@...>
Sent: Thursday, August 02, 2001 6:46 PM
Subject: [TekScopes] Hello-Tek Scopes, Manuals, and
Parts

Hello, I am Jim Reese from Ohio. ...
... We have a large selection of scopes,
plug-ins, manuals, and parts for Tek tube type

scopes and later

models. ...
... Let me know of anything you are looking for

via this

forum or contact me directly. I just found this

forum and will add

what I can to the knowledge base and discussions.
Jim Reese

Hello, Jim
some time ago I saved a Tek 564 storage scope from
an inglorious end, as
it was destined (from a school laboratory, where it
had not been used so
much) to the waste-basket.
As a matter of fact, the scope is physically in very
good order.
On it are mounted a 2B67 time-base unit and a 2A72
amplifier unit.
To restore its cosmetical original status, I need
one of the two
three-position slide switches that are on the front
of the 2A72 unit ,
and a new translucent screen with the fluorescent
reticular frame, which
I incautiously damaged while cleaning the scope,
after its salvation.
Moreover, the scope works, but it's definitely
uncalibrated.
So, I'd like to know if you can directly be, or if
you can indicate to
me, the source from where I can obtain the missing
items I listed, and
an operation and service manual (to be instructed
about calibration).
Thanks in advance. I apologize for my unprobable
English.
Greetings. Andrea Bovo.

This one has bothered me for a while. Sometimes the height will be about 50%
of normal on either channel. Very intermittent. If I put the unit in chop
and run the other channels position to very high or low on the screen, the
offending channel will 'pop' back to correct size. At one point I could tap
around the funny heatsinked hybrid in the vertical section and get it to
fail. Removed IC and cleaned the contacts with Qtip and Deoxit and it worked
for a while but then came back. Has classic symptoms of bad connection but I
can't seem to get it to fail often enough yet. Any shortcuts?
Note this scope appears to be quite different from 465 regular-flavor (at
least vert section).
Thanks

Peter Florance


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



Your use of Yahoo! Groups is subject to

-----Original Message-----
From: dhuster@... [mailto:dhuster@...]
Sent: Sunday, August 05, 2001 8:22 AM
To: TekScopes@...
Subject: [TekScopes] Re: 465M Flaky vertical height.


Peter, I agree with Stan about the intermittent tendancies of the
vertical and horizontal module connectors. The FAA bought the 465M
in droves, and since their main depot is in Oklahoma City, I got to
see most of the warranty work. The 455 and 465M are
really "upgraded" T900-series and weren't the best contribution to
the Tek product line. If you don't have the scope in its case, the
traces will be pretty noisy, so don't try troubleshooting THAT
little "problem".

As a side note regarding the FAA, the government makes for odd
equipment. The FAA used/uses a modified 535/545 scope for aligning
their VOR/TACAN system sites (those funny little low white buildings
you see around the country with the big bowling pin in the center).
The modified scope (and this was a special Tek production mod) had a
hole in the side of the scope cover with clear plastic cover ofer the
hole so that a slide switch could select normal scope operation or
direct access to the vertical deflection plates. They needed the mod
so that they could bypass the vertical amplifier and view the high
frequency of the TACAN. Of course, the 500-series was obsolete and
the FAA was getting tired of spending $1000+ per instrument for
refurbishment through Tek to keep the old girls going.

Well, of course, since the 545, scope bandwidths have improved a lot,
and the late Harold Drain, the OKC sales rep, and I went out to one
of the FAA's sites to demonstrate how an inexpensive, modern Tek
scope could easily and simply be used for this procedure without
having to mess with the cost of a special modification. A new scope
was going to cost them less than their typical 545 refurbishment.
They were delighted and and Harold and I figured that he was going to
be into bonus money with all the sales of new high-bandwidth scopes
this was going to generate.

Ha! We forgot that we were dealing with the U.S. Government.
Instead, they ordered a whole slew of 2213's with the identical
direct deflection plate access production modification that the old
500-series had. Seems that they figured that it was better to do
that than it was to modernize and rewrite the adjustment procedure
and retrain the old dogs that maintained the systems. So if any of
you out there ever get hold of a 2200-series scope on the surplus
market with a Plexiglas-covered hole in the left side of the case,
that's the history of the abortion setting in front of you.

Dean




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



Your use of Yahoo! Groups is subject to

-----Original Message-----
From: John Miles [mailto:jmiles@...]
Sent: Sunday, August 05, 2001 7:26 PM
To: TekScopes@...
Subject: Re: [TekScopes] Re: CONTACT CLEANER - note Cramolin Red is
'Tweek' (!)


Actually "Tweek" is an entirely different (and vastly more expensive)
substance, which is OEM'ed under the name "Stabilant 22."
()

Tweek/Stabilant is billed as a contact enhancer -- not merely a lubricant,
surfactant, or cleaner like DeOxit/Cramolin/WD40/whatever, but rather an
actual aid to conductivity. Supposedly, the idea is that
Stabilant behaves
as a good conductor across extremely small metal gaps -- on the order of
thousandths of an inch -- while acting as an insulator across
larger spaces.
This is what the guys on the Ferrari list say, anyway.... some of
them have
been using it on the badly-engineered fuse panels in the older cars with
good results. I haven't tried it myself, because the price ($20-$50 for a
couple of milliliters) and marketing claims make it sound like 99 44/100%
pure snake oil.

Now, I have taken Tek 7000 plugins apart and noticed a somewhat
gooey, clear
substance in the transistor socket pins that matches the look and feel of
Stabilant 22. Don't know if it was applied at the factory (which would
certainly lend a lot of credence to the snake-oilish claims above) or by a
third-party service person. Anyone have any knowledge of this stuff...
preferably accompanied by a few numbers? Ever heard of Tek using anything
like this on the production line?

-- jm

----- Original Message -----
From: <ashtonb@...>
To: <TekScopes@...>
Sent: Sunday, August 05, 2001 3:05 PM
Subject: [TekScopes] Re: CONTACT CLEANER - note Cramolin Red is
'Tweek' (!)


That is: the active ingredient is same - made by Wright (audio type
and inventor? discoverer? of the phenom) in Canada. Tweek was first
and invented that T. They fought, and Caig was enlisted to catch
up in 'marketing'. Anyway it is the surfactant which produces the
long-lasting 'miracle intermittent' cures - whatever the label logo
or the diluent decided on. Sometimes brush applicator beats spray -
matter of choice.

FWIW.

Ashton

--- In TekScopes@y..., jstanton@v... wrote:

For many years we used a contact cleaner "Cramolin Red" which used

to be distributed by Caig. I went searching for new supplies and
discovered that Cramolin is actually German and that Caig's Deoxit is
actually their knock-off of Cramolin and is probably just as
effective.

We achieved miracles with Cramolin. Temperamental equipment that

was plagued with intermittent faults became totally reliable after it
was disassembled and all connectors and contacts treated with the
Cramolin Red. More recently I have been able to resurrect some Tek
plugins and frames that had been stored in a hostile environment by
first cleaning switch and other contacts with isopropyl alcohol to
rinse away water and alcohol contaminants and then applying Cramolin
to attack the oxides and leave a protective, conductive lubricant.
This process failed on equipment that had clearly been underwater so
dont expect the impossible.

I notice that Cramolin is still in business. I just ordered Caig's

sample kit and shall compare it to my Cramolin Red dregs and report
the result.

On the subject of cleaning used Tek equipment my biggest problem

has
been with labels. I find the following method works:

1. Heat the label and attempt to peel it off.
2. Use "Goo Gone" lemon oil solvent to attempt to

dislodge it. This is a mild solvent that seems to be kind to
plastics.

3. Add some WD40 if it is stubborn. This is a stronger

solvent so take more care with it.

4. Aged label adhesive sometimes still resists and then

I carefully use some nail polish remover if there is metal or
anodizing underneath, using a moistened pad like an art restorer.

5. On a painted or plastic surface where acetone cannot

be used remnants can be removed with a scraper using a similar
technique one might use to scrape a bearing or a lathe bed (i.e. no
gouging).

6. Finally clean with a pure water and "Red Juice"

solution. Red Juice is an industrial cleaner that we use and source
from "The Clean Team" in San Francisco. It is a detergent without
other additives and leaves no residue, no pine smell, just clean.
They also make "Blue Juice" which is great for cleaning glass.

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



Your use of Yahoo! Groups is subject to






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



Your use of Yahoo! Groups is subject to

For many years we used a contact cleaner "Cramolin Red" which used

We achieved miracles with Cramolin. Temperamental equipment that

I notice that Cramolin is still in business. I just ordered Caig's

On the subject of cleaning used Tek equipment my biggest problem

1. Heat the label and attempt to peel it off.
2. Use "Goo Gone" lemon oil solvent to attempt to

3. Add some WD40 if it is stubborn. This is a stronger

4. Aged label adhesive sometimes still resists and then

5. On a painted or plastic surface where acetone cannot

6. Finally clean with a pure water and "Red Juice"