Date   

Thank you!

rollsroyce1_92394
 

Many thanks to all of you who kindly responded to my earlier
post, "Which scope to buy?". My electronics experience is limited to
some soldering and basic use of a multimeter, with my last formal
electronics class having been in high school during the late 60's,
so your answers were very helpful. I now have a Tek 485 scope,
manual, and probe set on the way and am looking forward to learning
to use it.

Thanks again for your help and guidance!

Royce


7L13 Service Manual

ROLYNN PRECHTL K7DFW
 

Used but very good condition 7L13 service manual. Still in shrink wrap from
commercial seller.

Unwanted purchase. Really needed a 7L14 manual.

$47.00 + Priority Mail. Slightly less than I paid for it.

Rolynn

..._._


1A7 manual download?

Scott Newell <newell@...>
 

A friend is wanting to study the common mode circuitry in the 1A7 front
end...I thought I had the book, but nope, I've got a 1A6 and 7A22 instead.
Anyone seen a 1A7 scan on any of the free manual repositories?


newell N5TNL


Tek 1106 Battery Pack for Parts-Free For The Shipping

Jim Reese
 

Hello Tekkies,

I have an 1106 that is destined for the trash that is good for
parts. The paint is peeling off of the case cover (can be repainted)
and the batteries are bad/old. The round battery level meter is
broken. Everything else (PCBs and transformer) looks OK and in
decent shape (not corroded). It is free to the first one that wants
it for the shipping cost from Dayton, Ohio.

Jim Reese


TEK 211 Problem

w1ksz <w1ksz@...>
 

I picked up a TEK 211 on e-bay and of course it doesn't work. It
doesn't even turn on. I verified power is getting into the scope and
the fuze is OK, but before I dis-embowel it, does anyone have any
hints on what to look at ? Any common failure mechanism I should look
at ? I do have the Service Manual for it.

Thanks, Dick, W1KSZ


Re: 7613 HV problem

Brad Hernlem
 

Phil,

I have one of those scopes. When I acquired it the HV section was
non-functional and in partial disassembly. After first thinking that
the big oscillator transistor was bad and after replacing the HV
rectifier, I discovered that the real problem (probably) was that the
HV cap was leaky and had to be replaced. The scope has been running
for several years (although I don't work it too hard). I'll have a
look at my manual and see how your parts difficulties compare to what
I observed.

Also, my 7613 has no readout board (I would LIKE one if anyone has
one, BTW ... hint, hint) and so, YES, the scope can run just fine
without it. My scope is USAF surplus and I think was originally
configured as a spectrum analyzer (hence, no readout board, has log
scaled graticule, &c.).

Brad KG6IOE


--- In TekScopes@yahoogroups.com, "Stan & Patricia Griffiths"
<w7ni@e...> wrote:
I don't recall seeing a response to this one. I checked the
Modification
Summary to see if failures of these parts are common and fixed by some
change in the 7613. Sorry, no luck there . . . I don't really have any
other suggestions for you but I thought you would want to know that I
researched for you anyway . . .

Sorry about the long delay. I'm swamped!

Stan
w7ni@e...

----- Original Message -----
From: "sittners" <sittners@s...>
To: "tekscopes" <tekscopes@yahoogroups.com>
Sent: Saturday, August 09, 2003 11:15 AM
Subject: [TekScopes] 7613 HV problem


I need a little help here and throw my open question out to the
group. I
have a 7613 that continues to blow the HV regulator transistor,
Q1314, and
diode CR1215 (from the collector of Q1314 to ground). The switching
transistors Q1216, Q1218 are fine, and the rectifiers test OK. How
can I
go
about isolating the problem; also, can the scope operate with the
readout
system board disconnected.

Phil


3L5

Craig Sawyers <c.sawyers@...>
 

Hi all

Heads up to those who are looking for a 1L5. There is a 3L5 (same as 1L5
spec, but fits a different scope) in its host 564B storage scope on eBay at
the moment item 2570840028. The guy has it on at a starting price of $25.

Craig


Tek 2337 Calibration

rodneyks7 <rksommerville@...>
 

Hi,
I have recently aquired a 2337 in need of calibration, I have a
collegue that can do it for me. However the only problem is I require
a service manual or part there of. Can anybody help?

Thanks in advance

Rodney


Tek565 blanking problem? can anyone help please?

Tim Phillips <t.phillips@...>
 

Hi, all;
I have a 565 scope that has been lying dormant for a few months;
First power-up, everything seemed OK. Next time I used it, both
traces appeared like they were Z-Modulated. The 'Z-Mod' frequency
is constant, doesn't appear to be affected by Time/cm, appears on
both traces in all combinations of Beam/Timebase.
Also, I can't turn the traces completely off with the Intensity
controls. I have a manual for the RM565 (sn3682) altho my unit is
*not* a rackmount. Last problem with this scope was 'B intensified' mode
not working. Fixed by replacing Q843 2N404, but I really don't like
poking around the CRT circuitry ! Any help much appreciated.

BTW, sorry, I didn't measure the 'Z-Mod' frequency.
regards
Tim.


Re: Which scope to buy?

Howard Matthews
 

--- In TekScopes@yahoogroups.com, "zenith5106" <zenith@t...> wrote:
--- In TekScopes@yahoogroups.com, "rollsroyce1_92394"
<rhesley@g...>
wrote:
I've been looking at older Tek 465, 475, 485 series scopes on
EBay,
and have a question for those of you in the know. I want to use
the
scope to precisely adjust G2 voltages on my Mitsubishi
widescreen
TV. The service manual procedure calls for adjusting them to
190V
using a scope set to 50V/div vertically and 2msec/div
horizontally.
The manual further specifies the use of 10:1 probes. Before I
cough
up the money for something that might not do the job and then
turn
out to be nonreturnable, can one of the Tektronix scopes I
mentioned
above do what I need? The specs I've seen don't really cover the
50V/division part of the requirement.

If these won't work, what older (read: inexpensive used) scope
(s)
would?

Thanks for any help you can give me.

Royce
------
What your TV manual means is 50 V/div at the probetip which is
what
you get when using a X10 probe on 5 V/div. All of the scopes you
mention can do that.
/Zenith
Royce,
The older and much less expensive 453, 454, (and -A) scopes can also
all handle up to 100V/div with a 10x probe. That works out to 600V
(peak-to-peak)for the older scopes, and 800V (p-p) for the -A models.

The probe is important. It must be rated for the maximum voltage
and the maximum frequency that you need to display. These older
scopes are 50 MHz or 100 MHz maximum bandwidth, which is actually
greater than inexpensive 10x probes.

I believe the 465, 475, 485 series are 100MHz, 200MHz, and 300Mhz
respectively, but I may be wrong.

Whatever scope you decide to use, be sure your probe is up to the
task, voltage and frequency-wise.

-Howard


Re: Tek in the movies (and TV)

Miroslav Pokorni
 

I guess, Tektronix did better with movies than computer manufacturers,
possibly because equipment was used only as display on set.

A number of computer manufacturers supplied Hollywood with machines to
produce films. In all cases that I heard of hardware was provided free of
charge and sometimes software support was free, too. Results were pretty
disastrous for suppliers, they went belly up or almost so, though Hollywood
thrived on cooperation. Computer manufacturers that I remember were:

1.. Silicone General provided heavy iron for several picture animation
efforts, starting with Jurassic Park. I believe that SG supplied software
support, too, with hope that their virtual reality effort would benefit from
association with Hollywood. SG almost got bankrupt in the process; they had
problems before, but expenditures for supporting movies almost bled them
white. A good temporary side effect was that SG had to sell Cray division,
so there was Cray Computers Inc. for a short while, again.
2.. Digital supplied minis for controlling sinking ship rig for filming
Titanic. We all know where is Digital now.
3.. On one of Intel's 'Developer's Forums' Andy Grove was showing a mini
computer (that everyone called 'server') of Intel's design and performance
was very impressive. Andy got carried away and made noises that 'perhaps the
machine could be also used by Hollywood'. I guess that association with
filmmakers is quite heady and contagious. Fortunately, that never came to
pass, so Intel is still around and healthy.
Regards

Miroslav Pokorni

----- Original Message -----
From: "deanhuster" <dhhuster@semo.net>
To: <TekScopes@yahoogroups.com>
Sent: Saturday, November 08, 2003 4:46 PM
Subject: [TekScopes] Re: Tek in the movies (and TV)



On TV: The bridge of "Battlestar Galactica" contained what
looked like millions of dollars worth of TM500 instruments.
I drool as I recall it, even after over two decades...

Yeah, John, the Battlestar was loaded with TM500 and some rack-mount
7K as well. Also, the fighter "planes" had "radar" displays that
were images of Tek 4000-series storage monitors or computers to
depict the movement of the enemy Cylon craft.

Tek really let all the Service Centers know about the Tek equipment
that was loaned for use on the set. That equipment was later sold to
Tek customers. We had one come through the OKC Service Center for
checkout before being given to the customer. Both the customer and
the sales engineer wanted the scope to have an engraved tag on the
cover denoting that it came from Battlestar Galactica.

Dean



Re: Tektronix 1502 TDR - Problem

deanhuster <dhhuster@...>
 

The 1502 and 1503 power supplies, CRT and chart recorder circuitry
are identical. The sampling systems are totally different. The
1502/3 battery packs have always been a problem. The owners tended
to keep the TDRs plugged in all the time and then expected them to
work just fine on battery in the field. I specialized in those
instruments in the OKC service center and had only one customer
(Southwestern Bell in Edmond, OK) who did it right and figured it out
on his own. He didn't charge the battery until the battery meter was
near the "death zone". Then he gave it an overnight charge and
didn't recharge until the meter indicated a low battery. He never
had to replace his battery pack in the five years I knew him while
other customers had to replace their packs at least annually if they
couldn't get a drastic multi-cycle discharge/charge routine to
rememorize their packs.

The two biggest killers of the 1502: (1) connecting the BNC to a
live circuit and (2) not discharging long coax cables before
connecting to the BNC. I remember in 1980 when the sampling bridge
was $40 and the TD was $120. Seemed expensive then, but don't you
wish for those prices now!

Dean


Dean


Re: Tek in the movies (and TV)

deanhuster <dhhuster@...>
 

On TV: The bridge of "Battlestar Galactica" contained what
looked like millions of dollars worth of TM500 instruments.
I drool as I recall it, even after over two decades...

Yeah, John, the Battlestar was loaded with TM500 and some rack-mount
7K as well. Also, the fighter "planes" had "radar" displays that
were images of Tek 4000-series storage monitors or computers to
depict the movement of the enemy Cylon craft.

Tek really let all the Service Centers know about the Tek equipment
that was loaned for use on the set. That equipment was later sold to
Tek customers. We had one come through the OKC Service Center for
checkout before being given to the customer. Both the customer and
the sales engineer wanted the scope to have an engraved tag on the
cover denoting that it came from Battlestar Galactica.

Dean


5112

Fladave
 

I am in need of a manual for a 5112, or to get started a manual /
schematic for the mainframe only. Have power supply problems in the
+5 and -30.

Thanks all

Dave


Big Cap for 465M

Earthlink <billbrobeck@...>
 

I believe the big 18,000mf cap is bad on my 465m scope. The part number is
290-0508-01. I'm looking for a NEW one since getting into it is going to be
a bear!. Can anyone direct me to a generic part number. Digi-Key offers alot
of 18,000 mf caps, but I don't know which kind to get.


Thanks

Bill Brobeck


FW: [Test-Equipment] textronix 2710 analyzer problem

John Miles <jmiles@...>
 

Forwarded to list, so the original poster will see it...

-- jm

-----Original Message-----
From: elie shvarzman [mailto:eliesh@zahav.net.il]
Sent: Friday, November 07, 2003 7:38 AM
To: John Miles
Subject: Re: [Test-Equipment] textronix 2710 analyzer problem


Dear Mr. Miles
The 2710 problem is very interesting duo to the fact that the "markers"
spacing change linarity with the sweep speed (like osciloscope display) that
gave me a conclusion that your problem is a analog noise recived somewere at
the if units to the deflaction amps.
To isolate it try to seperate (diconnect) the if stages by order or try to
"hunt" with osciloscope thru the if/video chain, tune the S.A to a random
center frequency (make shure its not reciving anything including "zero
frequency" marker) at this condition should be no if/video signal (exept
random white noise) and now you can trace the circuits with osciloscope.
My impresion is that this problem is from the chain between the detector to
the deflection amps. of cource the power supply can generate noise that may
picked up by the units.

Elie Shvarzman


Re: What's the best manual? / Microfiche

Stan & Patricia Griffiths <w7ni@...>
 

Hi Roland,

Some sets of microfiche have cross reference information to cover the
instruments made in Guernsey, Heerenveen, etc. but I am not sure they all
do.

I have not seen the Mod Summary info in hard copy form (except for the few
pages that I have converted myself). I don't think Tek ever made it
available in hard copy form.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "maddisassembler" <320041677522-0001@t-online.de>
To: <TekScopes@yahoogroups.com>
Sent: Friday, November 07, 2003 12:18 AM
Subject: [TekScopes] Re: What's the best manual? / Microfiche


For myself I basically encounter two different situations:

I buy one Tek instrument together with the manual
which intially accompanied it. (A rare case because
mostly you get only the bare instrument with all
accessories gone) No problem here because I have
the right manual with it.

I buy single instruments, whole batches, or
receive an instrument for repair (all without
manual). The only clue then is the serial number
and so I need my own manual collection or some
kind of digest to find info on that particular
serial number.

It seems that the only *real* way is to have all
microfiche at hand and so have the complete
modification information (...what about Guernsey,
Heerenveen, Tek England & Israel and so on?)

I also have the impression that microfiche info
only ranges into the 1990s years but for all
the 'new' instruments after that time there is no
information available (to the 'public') compared
to what was on microfiche.

Does anyone know if there are printed versions of
the modification information? (e.g. assorted by Type
and serial number range)


Best regards
-Roland


Re: Which scope to buy?

zenith5106 <zenith@...>
 

--- In TekScopes@yahoogroups.com, "rollsroyce1_92394" <rhesley@g...>
wrote:
I've been looking at older Tek 465, 475, 485 series scopes on EBay,
and have a question for those of you in the know. I want to use the
scope to precisely adjust G2 voltages on my Mitsubishi widescreen
TV. The service manual procedure calls for adjusting them to 190V
using a scope set to 50V/div vertically and 2msec/div horizontally.
The manual further specifies the use of 10:1 probes. Before I cough
up the money for something that might not do the job and then turn
out to be nonreturnable, can one of the Tektronix scopes I
mentioned
above do what I need? The specs I've seen don't really cover the
50V/division part of the requirement.

If these won't work, what older (read: inexpensive used) scope(s)
would?

Thanks for any help you can give me.

Royce
------
What your TV manual means is 50 V/div at the probetip which is what
you get when using a X10 probe on 5 V/div. All of the scopes you
mention can do that.
/Zenith


Re: 7613 HV problem

Stan & Patricia Griffiths <w7ni@...>
 

I don't recall seeing a response to this one. I checked the Modification
Summary to see if failures of these parts are common and fixed by some
change in the 7613. Sorry, no luck there . . . I don't really have any
other suggestions for you but I thought you would want to know that I
researched for you anyway . . .

Sorry about the long delay. I'm swamped!

Stan
w7ni@easystreet.com

----- Original Message -----
From: "sittners" <sittners@sbcglobal.net>
To: "tekscopes" <tekscopes@yahoogroups.com>
Sent: Saturday, August 09, 2003 11:15 AM
Subject: [TekScopes] 7613 HV problem


I need a little help here and throw my open question out to the group. I
have a 7613 that continues to blow the HV regulator transistor, Q1314, and
diode CR1215 (from the collector of Q1314 to ground). The switching
transistors Q1216, Q1218 are fine, and the rectifiers test OK. How can I
go
about isolating the problem; also, can the scope operate with the readout
system board disconnected.

Phil






Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/



Re: What's the best manual? / Microfiche

maddisassembler
 

For myself I basically encounter two different situations:

I buy one Tek instrument together with the manual
which intially accompanied it. (A rare case because
mostly you get only the bare instrument with all
accessories gone) No problem here because I have
the right manual with it.

I buy single instruments, whole batches, or
receive an instrument for repair (all without
manual). The only clue then is the serial number
and so I need my own manual collection or some
kind of digest to find info on that particular
serial number.

It seems that the only *real* way is to have all
microfiche at hand and so have the complete
modification information (...what about Guernsey,
Heerenveen, Tek England & Israel and so on?)

I also have the impression that microfiche info
only ranges into the 1990s years but for all
the 'new' instruments after that time there is no
information available (to the 'public') compared
to what was on microfiche.

Does anyone know if there are printed versions of
the modification information? (e.g. assorted by Type
and serial number range)


Best regards
-Roland



--- In TekScopes@yahoogroups.com, "Stan & Patricia Griffiths"
<w7ni@e...> wrote:
Tek no longer sells microfiche individually or by subscription.
They MAY
have kept one set for their own use . . . and they may have tossed
the LAST
set into the dumpster . . .

Tek Service Centers used microfiche and I don't know of any of them
that had...

...................

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