Date   

Tek 543,544,545B,547

Sam Reaves
 

Hello,

Sometime back I downloaded a detailed drawing of the 54X series HV
transformer. This was a detailed drawing that had all of the
information regarding the winding of the transformer. It was a
Tektronix drawing. I believe that I downloaded it from the group file
archives. Now I can't seem to find it. If someone out there has it
would you please email a copy (or upload it to the files section). I
wan to try rewinding a defective one.

Thanks,

Sam
W3OHM


Government surplus, eBay, 3T2 plugins, budgets

scoper796 <tekscopes@...>
 

I came actoss a person on eBay today who is selling five 3T2 sampling
plugins. They are new, in-the-box, sealed from the factory,
government surplus. It reminded me of working for the government, and
the year-end scramble to spend money.

Here's how it worked. Near the end of the budget year, the director
would come by and mention that we had, oh say $300,000 left in the
budget and he wanted us to spend as much of it as we could before
April 30. We would frantically phone suppliers to find out what they
had in stock that could be shipped and invoiced before the end of
April. Many times they couldn't ship the goods before the deadline,
so we would get them to ship an empty carton, or a box of old books,
whatever, so they could invoice the government and we could say we
got something.

What was the reason for this? Well, we got a lot of neat stuff, most
of which we could use. Sorta. But if the department went under-
budget, then next year we would get less. The money you didn't spend
went back into the big pot, and next year you might need more. More
questions were asked when you were under than when you were over
budget.

So these new-in-box government surplus 3T2's brought back memories of
buying frantically, and the stuff winding up in the storage room,
never to be even opened. I bet that's the story here too.

Larry Christopher


Hello from a new member and can anyone help with a 453 problem.

j_arkless
 

Hi there and thanks for a fascinating forum .
I have several old Tek scopes, all solid state and all in need of
repair to one extent or another, these incude several 465's, a 475,a
466 and a more recent 2215. My oldest and best (mint) condition one
being a 453. I repaired a fault in one Y amp ( a duff transistor) and
it now works pretty much ok (accuracy is exellent!) apart from the
following symptoms:
1. with "alt" selected for the twin traces, a much attenuated version
of either channel appears on the channel which is not in use,a sort
of "crosstalk" I suppose...this is not effected by the V/cm setting
of the channel not in use, or by selecting ground for this input.
2. correct triggering and stability of the displayed waveform are
rather tricky when either "chop" or "alt" are in use. It is fine with
just channel 1 or channel 2 alone in use. correct triggering and
stable display CAN be achieved but requires VERY fine adjustment of
trig level and correct choice of "lf reject","hf reject" etc.It
drifts off enough to require further fine tweaking of the controls
after just a few minutes...am I expecting too much from a sixties
scope?, I've got a feeling that a correctly functioning Tek scope,
even of this age, should perform better than this!?
Although an electronic engineer,I have little practical experience of
trouble-shooting old Tek 'scopes,if someone out there has seen this
fault before they could save me many evenings of head scratching!
I have downloaded a manual for it (like I said,great site!) and
therefore have circuit diagrams etc.
Cheers,
Jez.


1L10 update 2

Dave Wise
 

Most of the frequency instability comes from the
first oscillator. No surprise there except it seems
worse than it ought to be. Resolution bandwidths below
about 500Hz are unusable, even though it goes all the way
down to 10Hz. Perhaps that's when you hook up an external,
ultra-stable oscillator. I'll try adding filter caps on
the two voltage control lines going into it. (One line
is Fine Tuning and goes to a varactor diode, the other
is swept in Search mode and warps the oscillator's Vcc.)

The third oscillator (which is swept at all dispersions
other than Search) is a bit microphonic. With an external
first oscillator and 50Hz Resolution and down, when tuned
to the skirts of the filter the trace ripples in sync
with the scope's cooling fan, which is slightly out of
balance.

The resolution bandwidth filters are much sharper than
they ought to be, except at the sharpest (10Hz) setting.
Tek varied the bandwidth in an interesting way. The final
IF is 100kHz and goes through a 100kHz crystal. (Actually
two crystals but the second operates the same way as the
first.) It is connected as the top leg of a voltage divider.
The bottom leg is the following transistor.
Varying the current in the transistor's emitter
bypass diode changes the bottom leg impedance.
At light load, the crystals don't affect the signal
much, but at heavy load they become the determining
factor, passing signal at their series-resonant
frequency and nowhere else. Since the bottom leg
is low-impedance at this end of the range, the
signal is also attenuated, but (and this is cute!)
the transistor's gain increases by about the same
amount.

The "log amp" turns out to be nothing but a diode
across the output; I'll lower my expectations.

Dave Wise


Re: Dim trace on TEK 561A

scoper796 <tekscopes@...>
 

Hi,

Having recently worked on many of the 560 series scopes, I can tell
you that the most likely cause is the crt. If you are in a position
to check all votages including the HV, you may find a different cause
all right. But in every case I experienced, when faced with a very
dim trace in these units, replacement of the crt restored the light.

Larry Christopher


The eBay Promise: "It was owned by my grandfather - mother - husband
who never - hardly - seldom used it for amateur radio - tv service -
self stimulation and it worked - almost worked - probably worked when
put away one hour - one year - thirty years ago."

--- In TekScopes@yahoogroups.com, "penguinwil" <penguinwil@y...>
wrote:


Re: LOGSA

Gil Lapidus
 

Also AN/USM 488 is tek2235.

what's a 2230?


---------------------------------
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Meet the all-new My Yahoo! ľ Try it today!

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


LOGSA

aakmoe <aakmoe@...>
 

Hello all

Thanks to "James True N5ARW" who suggested using public proxy servers
, I can access the LOGSA site.

there are few files like 485 2465B manuals that will open with gnome
pdf viewer but not adobe acrobat.Do other have problems?

Also AN/USM 488 is tek2235.

How do I know what cross reference to NSN , AN/USM numbers.


Aung.K.Moe


Position Announcement: Sr. Software Engineer

vince_amela <vince_amela@...>
 

Company

Our customer has become a leading developer and provider of
precision equipment solutions used for research, development,
production and test in the semiconductor and life sciences markets.
Their strong market position can be attributed to its proprietary
core technology and the development of unique product platforms that
are broadly applicable in historically high-growth segments.
Recognized for driving technological innovation and scientific
advancement, our client can offer a unique opportunity for growth in
a face paced, engineer-centric culture.


Job Description

This person will develop software for our client's semiconductor
metrology and inspection equipment products. Applicants must be
highly self-motivated, self-directed and able to function within a
fast-paced development environment.

This position is a primary software development role for new and
existing semiconductor metrology products where the incumbent will
be responsible for research, development, test, and production
release of assigned work products.

Requirements include the ability to work on your own and in
conjunction with other developers/engineers in a team environment.
In addition expectations include contributing to software process
improvement, in-house training and tool evaluation/deployment as
required.

Using creativity, innovation, and experience to develop new
software, resolve design issues and troubleshoot and revise software
modules following company's software development procedures.

Interactions are primarily within the semiconductor-engineering
group with some cross-functional contact within the organization.
Excellent interpersonal and written communication skills are
required.

Specific Job Skills:

- A minimum of five years programming experience with strong C/C++
skills including multithreaded development using Windows XP and MS
Visual Studio.

- Requires strong background in electronics and with analog
electrical measurement techniques. (must have)

- Ability to develop software to optimize accuracy/speed trade-offs
for electrical measurements with existing hardware platforms and
interaction with hardware design engineers to improve hardware
platform performance.

- Must be familiar with operation, and use of electronic lab
equipment such as oscilloscopes and logic analyzers.

- Experience with any or all of metrology, motion control systems,
image acquisition, signal processing, optics and coordinate systems
transformations is desired.

- Experience in setting up experiments to verify concepts, isolate
problems and validate designs is required.

- BSEE, BSCS or equivalent required. Post graduate work a plus.


If you or some one you know is interested, please send your resume
to: resumes@generatorgroup.net

Please cite the job number: 195 in the subject line of your message,
so we know which job you are applying for. Thanks!


Dim trace on TEK 561A

penguinwil <penguinwil@...>
 

Being new to this forum I have high hopes that someone may help me
out with my latest bounty, a "working" 561A to complement my 555.
The trace on the 561A CRT however is ver dim. I've read the manual
after downloading it from BAMA (GREAT blessing!) and checked all the
HV checkpoints and all scheck out OK. And so do the low voltage
checks. I only get a faint dot or trace with INTENSITY fully CW. That
gets me about -2V on the control grid #3 with reference to the
Cathode. The voltage on the FOCUS grid #4 can be varied from -125V
to -70V. I can move the spot/trace allover the CRT face, but it
remains VERY dim. I'm at a loss here, is this the CRT being worn out?
Gassy CRT? I'm using a completely isolated (3500V +) filament
transformer to feed the 6.3V to the CRT. Original TEK Mains
transformer insulation for that broke down. The person I got this
beauty from told me that less than 5 months ago the brightness was
still OK and the scope was not used anymore after that . . .
Thanks for anybody that can shed any "light" on this dim story, I'd
really like to get this baby going again.


Am I dumb ?

georgesgiralt <georges.giralt@...>
 

Hi !
I've bought a Tek 2235 scope. It is the first scope I use since
college, a loooooong time ago. I had, at that time, not access at a
scope above 10 MHz, so I look at the Tek with due respect ;-)
I wonder if it is not working or if I'm dumb (I tend to favor the
later)...
It came with a P6112 10x probe and 2 P6122 probes and the user manual.
It powers up, and if I use a simple wire I'm able to see on the
screen the signal used to calibrate the probes. It is clean net
square.
Whatever probe I use, I can't display this signal properly : If "BW
limit" switch is not depressed, I see a rising front on the scope and
the platen of the square wave is about a thumb thick. If I reduce the
bandwith the thickness of the platen reduce somewhat, but stay at a
mere 1/2" thick....
So I've bought a Velleman scope probe which was the cheapest
availlable (1x, or 10x 15Mhz at 1x and 60MHz at 10x) with this probe,
I'm able to display properly the signal if I use the Bw limit, and
the 1x probe.
So I wonder if it's working fine or not ???
Environment : RF polluted, as I live at the top of THE hill in my
city, covered with aerial for VHF radios, and GSM cell phones.
More information : this behavior arises whatever channel I use. My
old Heathkit IG102 gives me a really bad and nasty display. But this
unit could be faulty.
What's wrong ? Do I've to go to oscillo 101 ?
Help please !


Tek 5111/5111A scopes

Tim Phillips <t.phillips@...>
 

Hi, all;
This is beginning to bug me now ;-)
I have what I thought was a Tek5111 or 5111A 'scope with
what I thought was Option 7 (rear signal outs)
I couldn't find a 5111 manual with Option 7, so I got a 5111A manual
opt7 (thanks, 'rocket7'). Anyways, my 5111 bears no similarity to the 'A'
manual; moreover my 'opt7' consists of a large PC board with lots of
pigtail-like jumpers, and small cables from the rear interface pins to
the 'Opt7' board. The rear signals are Sawt'h out/Gate out plus the
vertical amp signals. There is a Tek sticker on the rear : MOD 768X
It came from our Biomed Sciences people, if that's relevant.

Were the 5111 and 5111A very different?

What scope is this, actually?
many thanks
(bewilderedly) Tim. P.


Re: 561 CRT circuitry

Dave Brown <tractorb@...>
 

Bill and others-

Well I went to BAMA, saw 561, 561A and 561B - grabbed the '561scope.pdf' file and thought I was home and dry.
Not so!
Turns out that file is actually a military manual for the 561A and the 561B- NOT for the original 561.
So BAMA doesn't actually have a 561 manual at all. Double drat!

Deane Kidd (thanks, Deane) has sent me the basic info re CRT cctry differences, and that's all I need for now, but it leaves me on the hunt for a genuine 561 manual to cover off the rest of the instrument.
Anything out there?

Dave Brown

----- Original Message -----
From: "William H. Lagarde" <wlagarde@nc.rr.com>
To: "'Dave Brown'" <tractorb@ihug.co.nz>; <TekScopes@yahoogroups.com>
Sent: Tuesday, November 16, 2004 2:23 AM
Subject: RE: [TekScopes] 561 CRT circuitry



Go here: http://bama.sbc.edu/tektroni.htm



-----Original Message-----
From: Dave Brown [mailto:tractorb@ihug.co.nz]
Sent: Monday, November 15, 2004 6:01 AM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] 561 CRT circuitry



Any one have the manuals for BOTH the 561 and the 561A? I have the
latter manual but the CRT cctry in my 561 scope seems to be different.
(and looks original)

If some one with both manuals could have a look and let me know how
different they are-specially round the intensity control, I would
appreciate it. I may need a 561 manual if the differences are
significant-and they seem to be, based on a fairly quick look at just
this aspect.

Also, what value should the 561 intensity pot be?

Dave Brown



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Re: 7A13 Schematic or manual

Dave & Lynn @ Artek Media <manuals@...>
 

Scott

Which flavor of 7A13 do you have ? There are two .....the older "black" manual numeric display and the newer one with the "red" LED numeric display

Dave


At 02:31 PM 11/15/2004, oberusal wrote:


Hi,

Was wondering if anyone had a schematic for the 7A13. Just had one
go down in the lab, and need to get it back quickly.

Thanks,

Scott Touchton







Yahoo! Groups Links



Dave & Lynn Henderson
ArtekMedia
High Resolution Scans of Out-of-Print Technical Manuals
manuals@artekmedia.com
507-280-0124


Re: TM504/506 feet

Pierre F1BLF
 

According to TM504 & TM506 service manual,
there are two sorts of "feet" :

Tek P/N 348-0191-00 4 LEG, PLASTIC

Tek P/N 348-0207-00 2 FOOT, CABINET Right Front & Left
Rear

Tek P/N 348-0208-00 2 FOOT, CABINET Left Front & Right
Rear

But there are same P/N on TM504 and TM506 manuals.
Regards,

Pierre F1BLF



--- djconniff@sbcglobal.net wrote├»┬┐┬Ż:

---------------------------------
Hello all,
Can somebody tell me if the feet for the TM504 are the
same as those on the TM506?
I have a buyer, but don't want to ship them all the
way to Australia from Texas if they won't fit.
I realize the front stand will be too short to work,
but how about the feet alone? Thanks in advance.
Regards,
Darrin
---------------------------------







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Yahoo! Mail vous offre GRATUITEMENT 100 Mo !
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TM504/506 feet

djconniff@...
 

Hello all,
Can somebody tell me if the feet for the TM504 are the same as those on the TM506?
I have a buyer, but don't want to ship them all the way to Australia from Texas if they won't fit.
I realize the front stand will be too short to work, but how about the feet alone? Thanks in advance.
Regards,
Darrin


FS: TEK MANUALS Revised

Richard W. Solomon <w1ksz@...>
 

I have added several more to the list of old manuals, now covers most
models from 502A through 556.

..."I picked up a lot of Manuals the other day and found a gold-mine
of older tube scope manuals. They range from the 502 to the 541
and most all in-between. Let me know if you want to see the list.
They can be sent USPS Priority Mail, and are priced at $15 each,
shipped CONUS.
No Manual Merchants need apply."...

73, Dick, W1KSZ


7A13 Schematic or manual

oberusal
 

Hi,

Was wondering if anyone had a schematic for the 7A13. Just had one
go down in the lab, and need to get it back quickly.

Thanks,

Scott Touchton


Re: 561 CRT circuitry

Dave Brown <tractorb@...>
 

Thanks for the heads-up re BAMA, Bill- for some reason I thought the 561 wasn't there!
Cheers
Dave Brown. NZ

----- Original Message -----
From: "William H. Lagarde" <wlagarde@nc.rr.com>
To: "'Dave Brown'" <tractorb@ihug.co.nz>; <TekScopes@yahoogroups.com>
Sent: Tuesday, November 16, 2004 2:23 AM
Subject: RE: [TekScopes] 561 CRT circuitry



Go here: http://bama.sbc.edu/tektroni.htm



-----Original Message-----
From: Dave Brown [mailto:tractorb@ihug.co.nz]
Sent: Monday, November 15, 2004 6:01 AM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] 561 CRT circuitry



Any one have the manuals for BOTH the 561 and the 561A? I have the
latter manual but the CRT cctry in my 561 scope seems to be different.
(and looks original)

If some one with both manuals could have a look and let me know how
different they are-specially round the intensity control, I would
appreciate it. I may need a 561 manual if the differences are
significant-and they seem to be, based on a fairly quick look at just
this aspect.

Also, what value should the 561 intensity pot be?

Dave Brown



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Checked by AVG Anti-Virus.
Version: 7.0.289 / Virus Database: 265.3.0 - Release Date: 13/11/2004






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etflix.com/Default?mqso=60185401> click here



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:HM/A=2426685/rand=527410014>



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FS: Scope Probesl

Garey Barrell <k4oah@...>
 

Forwarded from another list, with permission.

Garey - K4OAH

+++++++++++++++++++

REPLY TO: <merz.ds@mellon.com>

For Sale: Oscilloscope Probes. $5 off total and Free Shipping if you buy 2 or more probes.


Tek P6105A, 10Meg, 11.2pf, 10X, 2 meter cable, BNC, with grip & ground clip. $20

Tek P6105A, 10Meg, 11.2pf, 10X, 2 meter cable, BNC, with grip & ground clip. $20

Tek P6101, 1X, 2 meter cable, BNC, with clip & ground clip. $20

Tek P6101A, 1X, 2 meter cable, BNC, with clip & ground clip and bag of accessories. $25

Tek P6053B, 10 Meg, 13.5pf, 10X, 9ft cable, BNC, w.ident feature, grip & clip. $25

Tek P6006, 10 Meg, 8.5pf, 10X, 6 ft cable, SO-239, with grip. $8
-- Chip in plastic

Tek P6012, 10X, 3 ft cable, BNC, w/grip. $20

Tek P6012, 10X, 6 ft cable, BNC, w/grip and clip. $20

Tek P6108, 10 Meg, 13pf, 10X, 100Mz, 2 meter cable, BNC, w/grip & clip. $30

Tek P6019, AC Current probe, with ground clip and termination for 2ma/mV to 10ma/mV, 2 meter cable, BNC. $30

Tek P6006, 10 Meg, 7pf, 10X, 3.5 ft cable, BNC, grip. $20

Unknown brand M12SW, switchable 1X or 10X, with adjustable compensation, 4 ft cable, BNC, very well made, looks like 50Mhz probe, with clip. $10

Unknown brand probe in good condition, with 5 ft cable, BNC, grip and clip. Older style construction in good conition. $7

TPI 1X/10X switchable, with adjustable compensation, 5 ft cable, BNC. $10

TPI 1X/10X switchable, with adjustable compensation, 5 ft cable, BNC $10

Leader LP-16A, 1X/10X switchable, with adjustable compensation, 5 ft cable, BNC, grip and clip. Modern construction in good shape. $10

Thanks for looking.
73, Don Merz, N3RHT
The information contained in this e-mail may be confidential and is intended solely for the use of the named addressee.
Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorized.
If you are not the intended recipient please notify us immediately by returning the e-mail to the originator.(A)
REPLY TO: <merz.ds@mellon.com>


Re: Photos from the Maple Ridge Swap Meet

stefan_trethan
 

On Mon, 15 Nov 2004 16:56:55 -0000, scoper796 <tekscopes@telus.net> wrote:


To view the photos, look to the left of this message, and you will
see in the menue "photos." Click there, then on "My collection"
folder.

Larry
well, not if you are not using the web interface.
If you use email you must scroll to the bottom, where you will find:

<http://groups.yahoo.com/group/TekScopes/>

follow it to the page with the "photos" link described by Larry.

ST

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