Date   

S-52 price madness

Craig Sawyers <c.sawyers@...>
 

Someone has lost the plot badly on auction 3807755566 on eBay. Bidding
ended at $455.01 for a single S52 pulser (that fits in the 7S12 TDR unit).
By comparison, a working 7854 with 7S12, S6 and S52 went for the same money
in the UK a couple of days ago

I was watching this S52, prepared to pay - oh I guess $80 at an absolute
maximum. Boy oh boy, would I have been outbid or what....

Craig


Re: Virus alert

Craig Sawyers <c.sawyers@...>
 

Just a heads up. I keep getting bounced emails from people I don't
know and one of them had a virus called netsky attached. I figure
that one of the 4 Yahoo groups I belong was hijacked so make sure
your antivirus software is up to date.
Any one of the 15 or more versions of Netsky is a mass-mailing e-mail worm.
If someone with your name in their mail list gets infected, it mails itself
to eveyone in the mail list (or anywhere else on the hard drive), but spoofs
the sender as any random one of the other mail addesses. So you get
infected mails from what *seems* to be a totally unknown person, but in fact
is from a friend who was bone headed enough to open an attachment to an
obvious virus propagation mail *and* is daft enough to not have an up to
date virus checker installed.

Read all about this current rash of worms and trojans at the folks who
supply my virus checker http://www.sophos.com , or on the specific page
dealing with them on
http://www.sophos.com/virusinfo/analyses/index_w32worm.html

Craig


Virus alert

regman10
 

Just a heads up. I keep getting bounced emails from people I don't
know and one of them had a virus called netsky attached. I figure
that one of the 4 Yahoo groups I belong was hijacked so make sure
your antivirus software is up to date.


Re: 661

Peter van Daalen <reteb@...>
 

Craig,

Thanks for your appreciated and adequate comments.
And for your warnings as to handling the diodes ( if need for replacement ).
I didn't realize my body was that powerful :-) woow.

I'll be on the look-out for a 4S2(A) now.

One more question please.

Why would the fastest 661 5T3 ET be 10 ps/div while the 4S1 BW is only 1 Ghz ?
Is this with respect to replacement by possibly faster sampling units ?
( But even with a 4S2 BW of 3.5 Ghz an ET of 10 ps/div seems overdone {?} ).
Or is is just by way of " magnification " ?
( My 1 Ghz BW DSA602 has a fastest ET of 200 ps/div only but with ( separate ) 50 x magnification = 4 ps/div ).

Thanks.

Peter van Daalen
PE1ECM

----- Original Message -----
From: Craig Sawyers
To: TekScopes@yahoogroups.com
Sent: Friday, April 09, 2004 4:03 PM
Subject: RE: [TekScopes] 661


> I saved an old 661 from scrap.
> It works.

Well done! Another one saved from the landfill.

> The archive mentions both of the said plug ins but I found no specs.
> The 5T3 has a shortest ET of 10 ps/div.
>
> What is the BW of the 4S1 ?
> What is the maximum(minimum) sampling rate/time ?
> What sampling diode is in the 4S1 ?
> Are there plugins with better specs ( than 5T3 and 4S1 )
> fitting into the 661 ?

There is a basic spec on the Tek website (of all places!!) -
http://www.tek.com/Measurement/Support/scopes/faq/500series/500list.doc

The answer is basically 1GHz - the sampling bridge is the same as in the
1S1 - but the 4S1 is dual trace. Early 1S1's used GaAs diodes, and later
ones Si. Probably replaceable with microwave Schottkys now (Agilent) if
they are blown - but you have to work quite hard to zap them. Watch static
discharge though - it is very easy to generate 10kV just walking around (and
since the human body is 200pF this is about 0.01 Joule!!) and this will
vapourise most fast, small active area devices.

As for faster plugins, the 4S2 does 3.5GHz and the 4S2A 3.9GHz. And 10ps
per division should be amply fast for any of those! 3.9GHz corresponds to a
rise time of about 90ps.

FWIW in 1969, the 661 was $1250, 5T3 was $875 and 4S1 was $1495. That makes
a total of $3620; in today's money that is around $35k. This data comes
from http://www.testmart.com/customerservice/customerservicetmp.cfm .

Who knows, in 35 years someone will find a TDS7000 in a dumpster.....

Craig


500 series test gear

Craig Sawyers <c.sawyers@...>
 

I'm going to say something controvertial.

I'm pretty disappoined with the 500 series of test gear. Not the tubed
scopes - I mean the test modules that fit into the power units.

I've been building up a small collection - a PG502, TG501, PG506, SG503,
AA501 and a couple of power units.

Circuitry, performance and functionality is fine - but the mechanics is far
below the mainframe scopes of the same generation (7xxx series and
associated plug-ins). They are flimsy - because the top and bottom rails
aren't tied at the rear of the unit, they just folded tabs that screw to the
circuit boards. The front plastic trim loses the corners - because the
fixing screws that hold it in place are counterunk heads, too close to the
corner - so they stress the plastic, it cracks and the corner falls off.

Then there is servicing. They are nearly impossible to conveniently
dismantle to board level. With the 7xxx series plug-ins, the only board
that is hard to deal with is the mother board that links through to the edge
connector - but you just unplug the piggy back boards and have immediate
access. With the 5xx series units, there is a wild assortment of spacers
that fall out, self tapping screws of umpteen lengths, and boards trapped
behind the folded tabs on the top and bottom rails. Fortunately I've only
had to fix the TG501 ane the PG506, and I've been more than happy that I
don't have to fix these things for a living.

They really do look like they have been *mechanically* designed by Tek's "B"
team.

Flame suit on....

Craig


Re: 661

Craig Sawyers <c.sawyers@...>
 

Who knows, in 35 years someone will find a TDS7000 in a
dumpster.....

Craig
------
It will probably be sooner than that .....
/Zenith
Yeah - I thought that as I was typing that sentence! And if it is, it'll be
broken. And there will be no service information available to fix it
either.

Craig


Re: 661

 

--- In TekScopes@yahoogroups.com, "Craig Sawyers" <c.sawyers@t...>
wrote:


Who knows, in 35 years someone will find a TDS7000 in a
dumpster.....

Craig
------
It will probably be sooner than that .....
/Zenith


Re: 661

Craig Sawyers <c.sawyers@...>
 

I saved an old 661 from scrap.
It works.
Well done! Another one saved from the landfill.

The archive mentions both of the said plug ins but I found no specs.
The 5T3 has a shortest ET of 10 ps/div.

What is the BW of the 4S1 ?
What is the maximum(minimum) sampling rate/time ?
What sampling diode is in the 4S1 ?
Are there plugins with better specs ( than 5T3 and 4S1 )
fitting into the 661 ?
There is a basic spec on the Tek website (of all places!!) -
http://www.tek.com/Measurement/Support/scopes/faq/500series/500list.doc

The answer is basically 1GHz - the sampling bridge is the same as in the
1S1 - but the 4S1 is dual trace. Early 1S1's used GaAs diodes, and later
ones Si. Probably replaceable with microwave Schottkys now (Agilent) if
they are blown - but you have to work quite hard to zap them. Watch static
discharge though - it is very easy to generate 10kV just walking around (and
since the human body is 200pF this is about 0.01 Joule!!) and this will
vapourise most fast, small active area devices.

As for faster plugins, the 4S2 does 3.5GHz and the 4S2A 3.9GHz. And 10ps
per division should be amply fast for any of those! 3.9GHz corresponds to a
rise time of about 90ps.

FWIW in 1969, the 661 was $1250, 5T3 was $875 and 4S1 was $1495. That makes
a total of $3620; in today's money that is around $35k. This data comes
from http://www.testmart.com/customerservice/customerservicetmp.cfm .

Who knows, in 35 years someone will find a TDS7000 in a dumpster.....

Craig


661

Peter van Daalen <reteb@...>
 

I saved an old 661 from scrap.
It works.

It has the 5T3 timebase and the 4S1 dual sampling plug in.

The archive mentions both of the said plug ins but I found no specs.
The 5T3 has a shortest ET of 10 ps/div.

What is the BW of the 4S1 ?
What is the maximum(minimum) sampling rate/time ?
What sampling diode is in the 4S1 ?
Are there plugins with better specs ( than 5T3 and 4S1 ) fitting into the 661 ?

Thanks for any reponse.

Peter van Daalen
PE1ECM.


Re: Tektronix Wire

Craig Sawyers <c.sawyers@...>
 

I don't recall seeing an answer to this email. The coax you need
is special
and I think made by Tek. The main difference between it an RG174 is that
this coax has a solid, stiff center conductor that is used as part of the
connector system (not unlike the "F" connector system). I believe this is
called the "Peltola" connector, named after Ron Peltola who was a very
clever Tektronix engineer and inventor of this connector system.
On a couple of occasions I have needed a specific type of wire. Usually this
has been multicored, and on one occasion was coiled too and had normal
single cores and a few coaxes.

It always surprised me how easy it was (a) to get prototype made and (b) how
low the cost was even in modest production quantity. So having custom cable
made wouldn't have been a big deal for Tek, even in low quantity of say 10km
per year in each of (say) 20 colour varieties.

Like the flexible extenders, which use a custom ribbon with a mix of two
guages of single core and 6 coaxes, which I bet only cost about $10 each
(the cable, that is) in 1000 off quantity.

Craig


W manual

gerbo04 <gjwinga@...>
 

How's this?:
http://bama.edebris.com/manuals/tek/w/

I haven't downloaded myself. Some of these are military versoin
manuals, but they are still usable.
gw


Re: Manual...

Miroslav Pokorni
 

Hello Chuck,
Go to BAMA, http://bama.sbc.edu/tektroni.htm, there is one there.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Chuck Miles" <chuckandmary@peoplepc.com>
To: <TekScopes@yahoogroups.com>
Sent: Wednesday, April 07, 2004 6:06 PM
Subject: [TekScopes] Manual...


Dear Tek Fans,

I am trying to locate a manual for the Tektronix Type W plug in unit.

Any help you could give me would be greatly appreciated.

Regards,

Chuck Miles
Junction City, OR


Re: 465 Chop Function

Miroslav Pokorni
 

Do not feel singled out for buying an instrument that had parts plugged in
backwards. I had a 7904 that had vertical pre-amp IC plugged in rotated
quarter of a turn and, guess, there was no deflection. Rotation job was
complete, IC retainer (which carries a wire, too) was bolted in place.

Just for kicks, I pulled IC out and let it cool down, plugged it in and it
worked. I could not believe it. In my time, I abused quite a few ICs and was
mostly lucky, I got away with it probably more than 70% of times, but those
were digital.

Check transistors which were plugged backwards for gain. When they are
plugged in wrong way, it is mostly that emitter and collector are reversed
and at collector voltages over 6 to 7 V, what is mostly the case,
emitter-base junction would zener and might partially fry base pattern,
especially in a high frequency transistors. A curve tracer should show that.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Dan Tulloss" <dtulloss@ntecusa.com>
To: <TekScopes@yahoogroups.com>
Sent: Wednesday, April 07, 2004 3:16 PM
Subject: [TekScopes] 465 Chop Function


I have a Tek 465. The problem was that the chop function did not work
at all. I looked into it and found some of the tranny's were either the
wrong part or in backwards. I have it working now except that I have a
massive amount of ringing and overshoot on the displayed square wave.
Ever seen this before? Any suggestions?

Dan Tulloss
Senior Metrologist
National Test Equipment, Inc.
760.639.1700
760.639.1799 fax
www.nationaltestequipment.com






Re: Which plugins for TEK561A

Miroslav Pokorni
 

Stan's book says that it takes '560 series plugs' and it is not more
specific. However, pictures of 561 and 561A show vertical plugs '60' and
3A1, while horizontal plugs shown are '67' and 3B3.

Hope this helps,

Miroslav Pokorni

----- Original Message -----
From: "n4buq" <n4buq@aol.com>
To: <TekScopes@yahoogroups.com>
Sent: Wednesday, April 07, 2004 7:45 AM
Subject: [TekScopes] Which plugins for TEK561A


Can someone point me to a source that shows which plugins will work
in a 561A? I seem to recall seeing this either in an online manual
or other source, but I can't recall where.

Thanks!

Barry - N4BUQ


Re: Tektronix Wire

Stan & Patricia Griffiths <w7ni@...>
 

Hi Jon,

I don't recall seeing an answer to this email. The coax you need is special
and I think made by Tek. The main difference between it an RG174 is that
this coax has a solid, stiff center conductor that is used as part of the
connector system (not unlike the "F" connector system). I believe this is
called the "Peltola" connector, named after Ron Peltola who was a very
clever Tektronix engineer and inventor of this connector system. The cable
is stirpped to expose a specific length of stiff center conductor and the
brass eyelets are crimped around the braided shield. On the circuit board,
a tiny socket is installed to receive the center conductor and a formed
piece of metal is soldered to the board to make a snug fit to the eyelet
installed on the cable. I believe the parts are gold plated. The
performance of this system is very high and the cost is very low, but the
cable seems to be special and may be hard to find.

I just happen to have an 18" piece of this cable with the eyelet already
crimped on one end and the other end bare which you can have if you will
send me your mailing address (no charge). The cable is blue with a black
stripe which is most likely the wrong color but it is the best that I can
do. Please let me know if you do not need this cable so I can put it back
into stock.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "jdpetrzelka" <j.petrzelka@verizon.net>
To: <TekScopes@yahoogroups.com>
Sent: Wednesday, March 03, 2004 10:35 PM
Subject: [TekScopes] Tektronix Wire


Been repairing some 500 series plug-ins lately, between the circuit
boards they use mechanical connectors, ribbon cables and some type of
coax with little brass eyelets at the ends as plugs, the coax looks
about like RG174 but something tells me it isn't. In the parts book it
calls out the eyelets but I don't see a refrence to the coax, does
anyone know what it is? Or where I can find some, I need about 10 -12
inches for a SC503. Thanks in advance for any info, Jon P.


Re: Computer museum

Dave Brown <tractorb@...>
 

Anyone had any experience of the 4041?
There's one up for grabs down here that I am chasing at present.

DaveB
NZ

----- Original Message -----
From: "Craig Sawyers" <c.sawyers@tech-enterprise.com>
To: <TekScopes@yahoogroups.com>
Sent: Thursday, April 08, 2004 5:44 PM
Subject: RE: [TekScopes] Re: Computer museum


Anyone remember that Tek used to make computers too ?
Yup. I did our custom wedding invitations on a 4051 and HP colour plotter
back in 1978.

Craig





Yahoo! Groups Links






Re: Computer museum/Tek 4041

maddisassembler
 

April 8th, 2004


...and also do not forget the Tek 4041.
I still operate one which is hooked up
to a Windows PC in 'terminal mode'.

I use the 4041 with its built in 'GPIB-Basic'
to control GPIP-instruments.

Regards
-Roland


--- In TekScopes@yahoogroups.com, "Craig Sawyers" <c.sawyers@t...>
wrote:
Anyone remember that Tek used to make computers too ?
Yup. I did our custom wedding invitations on a 4051 and HP colour
plotter
back in 1978.

Craig


Re: Computer museum

Craig Sawyers <c.sawyers@...>
 

Anyone remember that Tek used to make computers too ?
Yup. I did our custom wedding invitations on a 4051 and HP colour plotter
back in 1978.

Craig


Manual...

Chuck Miles <chuckandmary@...>
 

Dear Tek Fans,

I am trying to locate a manual for the Tektronix Type W plug in unit.

Any help you could give me would be greatly appreciated.

Regards,

Chuck Miles
Junction City, OR


Tek Manual

Chuck Miles <chuckandmary@...>
 

Dear Tek Fans,

I am trying to locate a manual for a Tektronix type "W" plug-in unit.

Any help would be greatly appreciated.

Regards,

Chuck Miles
Junction City, OR

176321 - 176340 of 183709