Date   

7d11

morriso2002 <morriso@...>
 

Hi all,

I am in need of a manual for a 7D11 plugin. Does anyone have one they
could copy, or even better, a scan??

All costs cheerfully paid for the right manual

Morris


7B53A Delayed Sweep

Robert Fincher <robfincher2001@...>
 

Thanks to everyone who replied to my plea for a
155-0042-03. A kind respondent has offered to send me
one forthwith. So my problem appears to be resolved.
Cheers
Rob Fincher

http://mobile.yahoo.com.au - Yahoo! Mobile
- Check & compose your email via SMS on your Telstra or Vodafone mobile.


Re: CRT

pierron1
 

Hi
how muck do you want for it .do you know if it is a
good tube or not.please write back
allan
N8ZHC
--- Dragan Stojanovic <dragans@eunet.yu> wrote:

I have available one, TEK part. no. 154-0850-01,
CRT.

Anyone interested in ?


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


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fast storage vs. slow storage?

Robert Morein <morepub@...>
 

The Tek 434 has much slower writing speed than the "fast" scopes.
I notice there was an almost free option to supply a faster writing CRT.
From this, I'm guessing there is some advantage to a CRT with slow writing speed.
Durability, perhaps?
Resistance to burn?
Does anyone have any figures for number of storage hours for the various tubes?


575

Morris Odell <morriso@...>
 

Hi all,

A friend of mine is restoring a 575 curve tracer mod 122C. It's a bit
different from the non-mod 122C manual we have. Is anyone able to help me
with a copy of the schematics (or the whole manual)? Usual costs reimbursed
etc..

Thanks,

Morris


CRT

Dragan Stojanovic <dragans@...>
 

I have available one, TEK part. no. 154-0850-01, CRT.

Anyone interested in ?


7B53A Delayed Sweep

Robert Fincher <robfincher2001@...>
 

Hello everyone,
My 7B53A does not work correctly in delayed sweep
mode, and I've tracked the problem down to a faulty
Miller integrator chip, ckt no U650, Tek part no
155-0042-03. Substituting a similar chip from a fully
functional 7B53A restored mine to normal operation.
So does anyone have one of these IC's that they could
let me have?
Any help would be much appreciated.
Rob Fincher
VK3BRF

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7104 CRT required

orgone1949 <orgone1949@...>
 

Hello all,
Does anyone know where I could purchase a replacement TEK 7104 CRT
from. The TEK Part Number is: 154-0783-00 Electron Tube CRT,
P31,T7100-31-2.

Thanks in advance.

Roy


HV multiplier for Lecroy

Robert Morein <morepub@...>
 

With apologies for my query, because this is related to a Lecroy scope, I think I've found a replacement HV multiplier: an ECG-501B.

Unfortunately, this part does not appear on vendor webpages, either as an ECG or an NTE (who bought ECG last year.)

This is an ordinary five diode multiplier, with a simple tap off the first stage for focus.

The form factor makes it feasible to fit under the HV shield in the Lecroy.

Where could I get this thing?


Re: 2246 With BROKEN COVER HELP

Mark Anton
 

Hi
Before you apply the glue, first melt some wires into the crack, that will help to give the plastic some stabililty. do this from the back side where it wont show. let it cool down and then apply the glue.
Use an old soldering iron, or at least a tip you dont care about, as it is sort of hard to get the melted plastic off the tip.
I have done this for a long time repairing broken tv cabinets etc.

Mark


----Original Message Follows----
From: "Rolynn Prechtl K7DFW" <k7dfw@clatskanie.com>
To: "Allan Pierron" <pierron1@yahoo.com>
CC: <TekScopes@yahoogroups.com>
Subject: Re: [TekScopes] Re: 2246 With BROKEN COVER HELP
Date: Fri, 4 Jul 2003 10:44:22 -0700

Household Goop. About $4.70 a tube and worth it's weight in gold. Has a
silicone base but is not anything like RTV.

http://tinyurl.com/g1j9

http://tinyurl.com/g1km

Between that, Super Glue (cyanoacrylate adhesive), epoxy or JB Weld and RTV
you can repair anything.

Out of that list Household Goop is the only thing that will be permanent on
that type of plastic. I've used it to do seemingly impossible things and it
holds with tenacity.

Other choices for some plastics could be Toluene (toluol) or a similar
solvent.

K7DFW Tek Bvtn '66-'71

..._._

_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus


Re: 2246 With BROKEN COVER HELP

ROLYNN PRECHTL K7DFW
 

Household Goop. About $4.70 a tube and worth it's weight in gold. Has a
silicone base but is not anything like RTV.

http://tinyurl.com/g1j9

http://tinyurl.com/g1km

Between that, Super Glue (cyanoacrylate adhesive), epoxy or JB Weld and RTV
you can repair anything.

Out of that list Household Goop is the only thing that will be permanent on
that type of plastic. I've used it to do seemingly impossible things and it
holds with tenacity.

Other choices for some plastics could be Toluene (toluol) or a similar
solvent.

K7DFW Tek Bvtn '66-'71

..._._


3RP1, etc, in small Tek scopes

 

as I recall, the tube in the 3" models is a derivative 3WP1/2 tube,
which is longer than the 3RP1A, and has MUCH higher deflection plate
sensitivity.

this tube sometimes appeared with the 3WP designation, and sometimes
with a Tek number, but I think the 3WP1 (sometines a P2 for slower
traces) works in all. some tubes seem to have come from dumont or
general atronics, later tubes were all made in house.

don't have any of the correct tube right now, but our Tek CRTs and
cross-ref data live here:
http://www.sphere.bc.ca/test/tek-crts.html

and our EIA type standard tubes live here:
http://www.sphere.bc.ca/test/crts.html

I have also scanned and posted a large amount of basic CRT data here:
http://www.sphere.bc.ca/test/crt-data.html

all the best,
walter


Re: 2246 With BROKEN COVER HELP

pierron1
 

--- Allan Pierron <pierron1@yahoo.com> wrote:
Hi
I have a tek 2246 with a broken front cover. The
blue
one that cover the front of the scope.
What would be a good glue to glue it with.I can not
find anything that works?
Allan
N8ZHC

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2246 With BROKEN COVER HELP

pierron1
 

Note: forwarded message attached.


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lcd module THS710

Peter de Vroome <p.devroome@...>
 

Hello Group,

I have a Tek THS710 with broken display, it seems that these displays are
manufactured by Sharp (LM320P10?), but has anyone an idea how to get a new
one?

thanks in advance!

Peter PE1DTN

the Netherlands


Re: 3RP1 for a 310A

cinerama84106
 

I often wondered if the 3RP1a would fit my 315A scope. I also wonder
if TEK actually made the CRT's back then???
Anyone know out there?
Mark


Re: 3RP1 for a 310A

Robert Morein <morepub@...>
 

3RP1 for a 310A

Will this CRT fit this scope?


Re: TD pulse generator

Miroslav Pokorni
 

All rise times and other hoopla aside, the thing that amazes me most is that
those old Eveready batteries sat in device for better part of 20 years and
never leaked and they are not even 'Extra Heavy Duty'. In addition to Craig'
s experience, I have two of those and each had battery in it and it never
leaked. In these days, I use alkaline batteries, carefully choose a brand
name (would never touch Eveready because of past leaks) and still, after few
years some of those batteries would leak. I guess, batteries are not yet
digital.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Craig Sawyers" <c.sawyers@tech-enterprise.com>
To: "TekScopes" <TekScopes@yahoogroups.com>
Sent: Thursday, July 03, 2003 7:02 AM
Subject: [TekScopes] TD pulse generator


Hi all

Just received a 067-0513-00 TD pulse generator, bought from eBay for $22.
Of course, there is the big question of whether the TD is alive and well,
so
I tried connecting the curve tracer to the GR output connector; staight
line
in both directions up to 50mA. Ouch!

The TD is held at the end of a short length of air line by a little
knurled
screw. I took the airline out, removed the screw and tapped onto a
surface
to get the TD out. Tiny little beast, around 1.5mm diameter and about the
same high, with a flange on one end. Got that carefully connected to the
curve tracer. Again nothing to 50mA - so I just kept increasing the
voltage
to see what would happen.

At 90mA - bingo! I've never come across a TD in Tek gear with that large
a
peak current. Anyway, I measure Ip=90mA at Vp=0.4V; Iv=10mA at Vv=0.5V;
peak point current of 90mA at 0.85V. With those specs, and the ultra-low
capacitance package I could start to believe the front panel spec of <30ps
switching time.

Next problem was the batteries. There are two 22.5V Energizer 412
batteries
in there in parallel (essentially obsolete), and both were as dead as a
doorpost. Fortunately, they are almost exactly the same size as standard
9V
batteries, so I substituted two of those wired in series. Connect to 7A19
for a quick test - and a nice looking pulse appears!

Neat thing is that this unit has a pre-trigger output, occurring at 60ns
before the TD pulse. It achieves this with a delay cable, so it is not
adjustable.

That gave me a problem when I went across to using a 7T11/7S11/S6 to
measure
the rise time - the 7T11 needs 75ns to get going, so the fast rise and
fall
are off screen. I could get them back again by using 20ns of cable from
the
TD head to the S6, but the rise time is dominated by cable effects
(measured
around 150ps). So I used random sampling, which is not as good as
sequential sampling as regards jitter (spec of 30ps as compared with
10ps),
but it was the only way to get a measurement. I used an SMA/GR adaptor,
and
then plugged the head straight onto the S6.

Interpreting around the jitter (which was actually more like 15ps), the
total rise is about 40ps. Now the S6 is specced at <30ps, as is the
067-0513-00, so the combined response should be <43ps - around what is
measured.

So all in all, this was a good $22 worth (oh, and $32 to get it across the
pond).

Craig


Re: Opinions on TDS 744A

Denis Cobley <denis.cobley@...>
 

Hi
They are a good scope - lots of features.
Only problem is if it fails you will find it difficult to repair as they
were totally board exchange.
Once the scope is classed "Obsolete" no more exchange modules are available.
There were never any circuits published for the TDS5/6/7/800 range of scopes
and they used a number of custom parts so a "seat of the pants" repair is
also difficult.
Having said that, Teks typical failure rate is less than 2% per year so you
may never see it fail.
Life is a risk - do you want to take it ?
Regards
Denis

----- Original Message -----
From: "tbfowler100" <tfowler@mitretek.org>
To: <TekScopes@yahoogroups.com>
Sent: Thursday, July 03, 2003 10:45 PM
Subject: [TekScopes] Opinions on TDS 744A


Is anyone familiar with this scope? Any opinions on it? It has
been discontinued, but seems nice based on its description. There
is no substitute for experience with scopes, however!





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


TD pulse generator

Craig Sawyers <c.sawyers@...>
 

Hi all

Just received a 067-0513-00 TD pulse generator, bought from eBay for $22.
Of course, there is the big question of whether the TD is alive and well, so
I tried connecting the curve tracer to the GR output connector; staight line
in both directions up to 50mA. Ouch!

The TD is held at the end of a short length of air line by a little knurled
screw. I took the airline out, removed the screw and tapped onto a surface
to get the TD out. Tiny little beast, around 1.5mm diameter and about the
same high, with a flange on one end. Got that carefully connected to the
curve tracer. Again nothing to 50mA - so I just kept increasing the voltage
to see what would happen.

At 90mA - bingo! I've never come across a TD in Tek gear with that large a
peak current. Anyway, I measure Ip=90mA at Vp=0.4V; Iv=10mA at Vv=0.5V;
peak point current of 90mA at 0.85V. With those specs, and the ultra-low
capacitance package I could start to believe the front panel spec of <30ps
switching time.

Next problem was the batteries. There are two 22.5V Energizer 412 batteries
in there in parallel (essentially obsolete), and both were as dead as a
doorpost. Fortunately, they are almost exactly the same size as standard 9V
batteries, so I substituted two of those wired in series. Connect to 7A19
for a quick test - and a nice looking pulse appears!

Neat thing is that this unit has a pre-trigger output, occurring at 60ns
before the TD pulse. It achieves this with a delay cable, so it is not
adjustable.

That gave me a problem when I went across to using a 7T11/7S11/S6 to measure
the rise time - the 7T11 needs 75ns to get going, so the fast rise and fall
are off screen. I could get them back again by using 20ns of cable from the
TD head to the S6, but the rise time is dominated by cable effects (measured
around 150ps). So I used random sampling, which is not as good as
sequential sampling as regards jitter (spec of 30ps as compared with 10ps),
but it was the only way to get a measurement. I used an SMA/GR adaptor, and
then plugged the head straight onto the S6.

Interpreting around the jitter (which was actually more like 15ps), the
total rise is about 40ps. Now the S6 is specced at <30ps, as is the
067-0513-00, so the combined response should be <43ps - around what is
measured.

So all in all, this was a good $22 worth (oh, and $32 to get it across the
pond).

Craig

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