Date   

Re: c-12 camera

snapdiode
 

It comes with an attractive case. I wonder what they paid for it ... there must be some buyer's remorse over there.


Re: c-12 camera

Richard Solomon <dickw1ksz@...>
 

You offered too much.

73, Dick, W1KSZ

On Dec 13, 2017 6:17 PM, "snapdiode@... [TekScopes]" <
TekScopes@...> wrote:



They declined my generous 40$ offer too. Something tells me they don't
realize what this is, given the erroneous description.

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



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


Re: c-12 camera

snapdiode
 

They declined my generous 40$ offer too. Something tells me they don't realize what this is, given the erroneous description.


Re: c-12 camera

Chris Trask - N7ZWY/WDX3HLB
 

That's not ludicrous, it's outrageous! I have a number of Tektronix scope cameras, and a few were simply given to me. When the cost of the Polaroid film became too expensive, I simply used a digital camera on a tripod.


I've get the urge to mount a camera to my 547. I suppose the C-12 is the correct camera for this scope.

Are these cameras always this ludicrously expensive?

http://www.ebay.ca/itm/Oscilloscope-camera-C-12-w-75mm-F-1-9-Oscillo-Paragon-3-0-85X-ilex-Nice-Set/332486059166?hash=item4d69b6a49e:g:Z6wAAOSwEK9T9Y4B http://www.ebay.ca/itm/Oscilloscope-camera-C-12-w-75mm-F-1-9-Oscillo-Paragon-3-0-85X-ilex-Nice-Set/332486059166?hash=item4d69b6a49e:g:Z6wAAOSwEK9T9Y4B
Chris

When the going gets weird, the weird turn pro
- Hunter S. Thompson


Re: Deane Kidd and the Metric System

Dave Seiter
 

Dennis, you forgot the Anthony and Sacagawea dollar coins, the later is still minted.
-Dave

From: "'Dennis Tillman' @Dennis_Tillman_W7pF [TekScopes]" <TekScopes@...>
To: TekScopes@...
Sent: Wednesday, December 13, 2017 3:05 PM
Subject: RE: [TekScopes] Deane Kidd and the Metric System

  About once a week my wife asks me a question which goes something like this:
The recipe calls for 1 teaspoon of xxx per 8oz of yyy, how many ounces of
xxx do I need if I'm making two gallons of yyy?

Our paper currency is metric, but our coinage is a throwback to older times
and it is starting to change as pennies are becoming too worthless to be
bothered with in many cases. As to the rest consider this mess:
* There are five pennies in a nickel
* There are two nickels in a dime
* There are five nickels (or 25 pennies) in a quarter.
* A quarter is a quarter (1/4) of a dollar so there are four in a dollar
* A bit was 1/8th of a dollar so a quarter is also known as "two bits". This
goes back to when the dominant currency was the Spanish dollar (also known
as pieces of eight) which was worth 8 Spanish silver reales. One reale was
one bit.
* A half dollar (a coin most people would rather not have in their pocket
because of its weight) is worth two quarters, four bits, five dimes, ten
nickels, or 50 pennies.
* A dollar is made up of 20 nickels, 10 dimes, 4 quarters, 2 fifty-cent
pieces or any combination that adds up to 100 pennies. Most dollars are
paper but there are silver dollar coins as well although the mint stopped
making them a long time ago so they are more of a collector's item.

Thank goodness we don't have the Looney (the Canadian $2 coin). We do have
the $2 bill but it is not in common usage. It is more a novelty. Some people
believe it is unlucky to receive one.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]
Sent: Tuesday, December 12, 2017 11:13 PM
To: TekScopes@...
Subject: RE: [TekScopes] Deane Kidd and the Metric System

Subject: [TekScopes] Deane Kidd and the Metric System
Metrification would have been a nightmare for Deane had it survived.
I'm sure Deane breathed a
sigh
of relief when the metrification of the US fizzled shortly after it
started.

Dennis Tillman W7PF
That is a very interesting story Dennis. It must have come as a shock when
you touched Deane's nerve. But oddly you have had metric currency for a
whole lot longer than we have in the UK.

But of course, we in the UK went through the whole metrication process.
However it was more protracted than I remember
https://en.wikipedia.org/wiki/Metrication_in_the_United_Kingdom , which is
why it is a success, and full of imperial hangovers that I mentioned in an
earlier post.

The last metric bastion for me, and this is recently, is navigation by map
and compass. I used to estimate in miles distance and feet of elevation
gained. Then someone who I respect said "What on earth are you doing that
for? Ordnance Survey maps are divided into kilometre squares, and the
contours are in either 5 or 10 metre intervals". Ding - the light went on.

Craig

------------------------------------
Posted by: "Craig Sawyers" <c.sawyers@...>
------------------------------------

------------------------------------

Yahoo Groups Links

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


c-12 camera

snapdiode
 


Re: Tektronix 2213a manual with single page schematic diagrams

Tom Jobe <tomjobe@...>
 

The 2213 and the 2213A are very different, enough so that the 2213
manual and schematics are useless to you.
tom jobe...

On 12/13/2017 1:17 PM, gonio.david@... [TekScopes] wrote:

Hello,


I want to work on my 2213a and I need schematics.


Searching online I found this document available from many websites:
http://w140.com/tektronix_2213_service.pdf
http://w140.com/tektronix_2213_service.pdf



The problem with this document is that all of the fold outs (i.e.
schematics and diagrams) are split among multiple pages. This makes it
very difficult to view. I tried to print out the pages to put them
together, but they do not fit together well.


Does anyone know where I can get the schematics on a single page apart
from buying the paper manual on ebay?


Thank you,


David






Re: Tektronix 2213a manual with single page schematic diagrams

ArtekManuals
 

Yes our 2213A manual scan has full size schematics

Dave
manuals@...
On 12/13/2017 5:43 PM, Sigurūur Ńsgeirsson siggi@... [TekScopes] wrote:

On Wed, 13 Dec 2017 at 16:17 gonio.david@... [TekScopes] <
TekScopes@...> wrote:



Hello,


I want to work on my 2213a and I need schematics.


Searching online I found this document available from many websites:
http://w140.com/tektronix_2213_service.pdf
http://w140.com/tektronix_2213_service.pdf



The problem with this document is that all of the fold outs (i.e.
schematics and diagrams) are split among multiple pages. This makes
it very
difficult to view. I tried to print out the pages to put them
together, but
they do not fit together well.


Does anyone know where I can get the schematics on a single page apart
from buying the paper manual on ebay?
For $8.50 you can get the operations and service manuals from Artek
Manuals. I haven't seen this particular scan, but all the others I
have are
pretty sweet.

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

--
Dave
Manuals@...
www.ArtekManuals.com


Re: Deane Kidd and the Metric System

Chris van Lint
 

Dennis,

I have to agree that somehow $2.00 does not seem
to fit into a metric system. On the other hand
don't knock the $2.00 coin. Here in Oz we have
$2.00 coins and they are quite handy, because
they are much smaller compared to the $1.00
coins. Our 50 cent coins on the other hand are huge and heavy.

Chris VK4CVL

At 09:04 AM 14/12/2017, you wrote:


About once a week my wife asks me a question which goes something like this:
The recipe calls for 1 teaspoon of xxx per 8oz of yyy, how many ounces of
xxx do I need if I'm making two gallons of yyy?

Our paper currency is metric, but our coinage is a throwback to older times
and it is starting to change as pennies are becoming too worthless to be
bothered with in many cases. As to the rest consider this mess:
* There are five pennies in a nickel
* There are two nickels in a dime
* There are five nickels (or 25 pennies) in a quarter.
* A quarter is a quarter (1/4) of a dollar so there are four in a dollar
* A bit was 1/8th of a dollar so a quarter is also known as "two bits". This
goes back to when the dominant currency was the Spanish dollar (also known
as pieces of eight) which was worth 8 Spanish silver reales. One reale was
one bit.
* A half dollar (a coin most people would rather not have in their pocket
because of its weight) is worth two quarters, four bits, five dimes, ten
nickels, or 50 pennies.
* A dollar is made up of 20 nickels, 10 dimes, 4 quarters, 2 fifty-cent
pieces or any combination that adds up to 100 pennies. Most dollars are
paper but there are silver dollar coins as well although the mint stopped
making them a long time ago so they are more of a collector's item.

Thank goodness we don't have the Looney (the Canadian $2 coin). We do have
the $2 bill but it is not in common usage. It is more a novelty. Some people
believe it is unlucky to receive one.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]
Sent: Tuesday, December 12, 2017 11:13 PM
To: TekScopes@...
Subject: RE: [TekScopes] Deane Kidd and the Metric System

Subject: [TekScopes] Deane Kidd and the Metric System
Metrification would have been a nightmare for Deane had it survived.
I'm sure Deane breathed a
sigh
of relief when the metrification of the US fizzled shortly after it
started.

Dennis Tillman W7PF
That is a very interesting story Dennis. It must have come as a shock when
you touched Deane's nerve. But oddly you have had metric currency for a
whole lot longer than we have in the UK.

But of course, we in the UK went through the whole metrication process.
However it was more protracted than I remember
https://en.wikipedia.org/wiki/Metrication_in_the_United_Kingdom , which is
why it is a success, and full of imperial hangovers that I mentioned in an
earlier post.

The last metric bastion for me, and this is recently, is navigation by map
and compass. I used to estimate in miles distance and feet of elevation
gained. Then someone who I respect said "What on earth are you doing that
for? Ordnance Survey maps are divided into kilometre squares, and the
contours are in either 5 or 10 metre intervals". Ding - the light went on.

Craig

------------------------------------
Posted by: "Craig Sawyers" <c.sawyers@...>
------------------------------------

------------------------------------

Yahoo Groups Links


Re: Tektronix 2213a manual with single page schematic diagrams

Ted Rook
 

Yes the Artek 2213A manual is a thing of beauty!, full size schematics, high resolution, 8 bit
color not photocopy black and white, searchable linked text, I don't know how they do it for
the money.

Ted

On 13 Dec 2017 at 21:17, gonio.david@... [TekScopes] wrote:


Hello,


I want to work on my 2213a and I need schematics.


Searching online I found this document available from many websites:
http://w140.com/tektronix_2213_service.pdf http://w140.com/tektronix_2213_service.pdf



The problem with this document is that all of the fold outs (i.e. schematics and diagrams) are split
among multiple pages. This makes it very difficult to view. I tried to print out the pages to put
them together, but they do not fit together well.


Does anyone know where I can get the schematics on a single page apart from buying the paper
manual on ebay?


Thank you,


David



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


Re: Deane Kidd and the Metric System

 

About once a week my wife asks me a question which goes something like this:
The recipe calls for 1 teaspoon of xxx per 8oz of yyy, how many ounces of
xxx do I need if I'm making two gallons of yyy?

Our paper currency is metric, but our coinage is a throwback to older times
and it is starting to change as pennies are becoming too worthless to be
bothered with in many cases. As to the rest consider this mess:
* There are five pennies in a nickel
* There are two nickels in a dime
* There are five nickels (or 25 pennies) in a quarter.
* A quarter is a quarter (1/4) of a dollar so there are four in a dollar
* A bit was 1/8th of a dollar so a quarter is also known as "two bits". This
goes back to when the dominant currency was the Spanish dollar (also known
as pieces of eight) which was worth 8 Spanish silver reales. One reale was
one bit.
* A half dollar (a coin most people would rather not have in their pocket
because of its weight) is worth two quarters, four bits, five dimes, ten
nickels, or 50 pennies.
* A dollar is made up of 20 nickels, 10 dimes, 4 quarters, 2 fifty-cent
pieces or any combination that adds up to 100 pennies. Most dollars are
paper but there are silver dollar coins as well although the mint stopped
making them a long time ago so they are more of a collector's item.

Thank goodness we don't have the Looney (the Canadian $2 coin). We do have
the $2 bill but it is not in common usage. It is more a novelty. Some people
believe it is unlucky to receive one.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]
Sent: Tuesday, December 12, 2017 11:13 PM
To: TekScopes@...
Subject: RE: [TekScopes] Deane Kidd and the Metric System

Subject: [TekScopes] Deane Kidd and the Metric System

Metrification would have been a nightmare for Deane had it survived.
I'm sure Deane breathed a
sigh
of relief when the metrification of the US fizzled shortly after it
started.

Dennis Tillman W7PF
That is a very interesting story Dennis. It must have come as a shock when
you touched Deane's nerve. But oddly you have had metric currency for a
whole lot longer than we have in the UK.

But of course, we in the UK went through the whole metrication process.
However it was more protracted than I remember
https://en.wikipedia.org/wiki/Metrication_in_the_United_Kingdom , which is
why it is a success, and full of imperial hangovers that I mentioned in an
earlier post.

The last metric bastion for me, and this is recently, is navigation by map
and compass. I used to estimate in miles distance and feet of elevation
gained. Then someone who I respect said "What on earth are you doing that
for? Ordnance Survey maps are divided into kilometre squares, and the
contours are in either 5 or 10 metre intervals". Ding - the light went on.

Craig




------------------------------------
Posted by: "Craig Sawyers" <c.sawyers@...>
------------------------------------


------------------------------------

Yahoo Groups Links


Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse)

Bill Riches
 

Hi Tam,



If you cannot get that one I have one that is in excellent working condition for 175.00.



73,



Bill, WA2DVU

Cape May, NJ



From: TekScopes@... [mailto:TekScopes@...]
Sent: Wednesday, December 13, 2017 10:12 AM
To: TekScopes@...
Subject: [TekScopes] Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse)





Hello,

tried to get the guys email addy, but the Craigslist web site is not
willing to let me in.

I would gladly pay for shipping. The 575 is the last of the Danaher
curve tracers I still miss for my upgrade project.

Tam

--
With best regards
Tam Hanna
---

NEW: Enjoy electronics? Like seeing oscilloscopes get repaired? Please subscribe to my new YouTube channel -> http://www.youtube.com/user/MrTamhan





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


Re: Tektronix 2213a manual with single page schematic diagrams

Siggi
 

On Wed, 13 Dec 2017 at 16:17 gonio.david@... [TekScopes] <
TekScopes@...> wrote:



Hello,


I want to work on my 2213a and I need schematics.


Searching online I found this document available from many websites:
http://w140.com/tektronix_2213_service.pdf
http://w140.com/tektronix_2213_service.pdf



The problem with this document is that all of the fold outs (i.e.
schematics and diagrams) are split among multiple pages. This makes it very
difficult to view. I tried to print out the pages to put them together, but
they do not fit together well.


Does anyone know where I can get the schematics on a single page apart
from buying the paper manual on ebay?
For $8.50 you can get the operations and service manuals from Artek
Manuals. I haven't seen this particular scan, but all the others I have are
pretty sweet.


Tektronix 2213a manual with single page schematic diagrams

David Goniodsky
 

Hello,


I want to work on my 2213a and I need schematics.


Searching online I found this document available from many websites:
http://w140.com/tektronix_2213_service.pdf http://w140.com/tektronix_2213_service.pdf



The problem with this document is that all of the fold outs (i.e. schematics and diagrams) are split among multiple pages. This makes it very difficult to view. I tried to print out the pages to put them together, but they do not fit together well.


Does anyone know where I can get the schematics on a single page apart from buying the paper manual on ebay?


Thank you,


David


Progress report on move to Groups.io

 

Michael Dunn and I are making progress. Our Groups.io account has been
created. There are quite a few questions Michael and I have to resolve to
set it up properly. The goal is to make the new site as close to our
existing Yahoo group as possible to minimize your confusion during the
transition to TekScopes at Groups.io.



We have been setup as a Premium group which gives us 10GB of storage. We are
using 3+GB at Yahoo at the present time.



Thank you for your patience. Please contact me directly (@Dennis_Tillman_W7pF
<mailto:@Dennis_Tillman_W7pF> ) if you have something urgent to communicate
regarding the new Groups.io home for TekScopes.



Dennis Tillman W7PF


Re: Deane Kidd and the Metric System

 

Not forgetting the Guinea (£1 1s 0d == 1.05 in new money) ...

Dave

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]
Sent: 13 December 2017 13:44
To: TekScopes@...
Subject: Re: [TekScopes] Deane Kidd and the Metric System

Don't forget the 2 and 6 pence, called a 1/2 Crown.
And the 5 bob called a Crown = 60 pence
Etc etc.

Jim
Ei2BB

On 13 December 2017 at 13:40, geoffrey thomas geoffreythomas@... [TekScopes] <TekScopes@...> wrote:



Well yes, but you have 100 pennies to the dollar, same as us to the
pound. But we have other coins
too.
<snip>

sixpence or half-bob - also called a "tanner"
two shilling or two bob - also called a "florin"
<snip>

Geoff.



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



------------------------------------
Posted by: "James R. Bartlett" <james.r.bart@...>
------------------------------------


------------------------------------

Yahoo Groups Links


Re: Deane Kidd and the Metric System

Craig Sawyers <c.sawyers@...>
 

Shortly after metrication of the UK currency came in, I saw a humorous article purporting to be
issued
by a Government Department which put forward the idea of metrication of time.
I think that was an April Fool.

After the French Revolution, the Republicans metricating the year. And the clock. There were 12
renamed months, and each one had three weeks of ten days. Not quite perfect, because that is 360 days.
Once Napoleon took over he wasted no time in scrapping it and going back to the original Gregorian
calendar.

Of course there is metric music, in which the octave is divided into ten notes rather than twelve
http://www.derek-hasted.co.uk/assets/audio/derek-hasted/ten-tone.mp3

Craig


Re: 7854 vs 7D20

Harvey White
 

On Wed, 13 Dec 2017 07:37:27 -0000, you wrote:

Unfortunately the 7854 did not have floating point math, a fast microprocessor, or lots of storage
(3
things you need to do an FFT) so it is not practical except as a proof of what the 7854 was
capable of.

Dennis Tillman W7PF
The 7854 uses a TMS9900 processor, with a maximum clock speed of 3MHz. Takes me back to 1981 in my
first paid job, designing video switching networks driven by that processor. Massive ceramic package
that needed a great amount of force to push into a turned pin socket.

Because it was so sluggish, that processor design worked right off. I put all the bodge logic into a
PAL. The one gotcha is that Texas had different division for processors and memories. And each of
them labelled their buses the opposite way. Bastards. One has A0/D0 as LSB and the other had them as
MSB - so there was a massive bit scramble on the buses. While I was moaning about my not noticing it
and beating my chest, and just about to run at the circuit board with a knife and wirewrip, our
brain-on-a-stick software guy said "Don't do anything - I'll just do a bit scramble in software.
It'll be a security feature!". I could have kissed him; well not really, but you get the idea that I
was a relieved guy.
I ran into the same thing for the TMS9914 in a very early 488 bus
control design. The hardware engineer "guessed" wrong. I was the one
doing the software, so it was easy enough to redefine the commands and
flip the data in software.




That software fella was of course a bit weird. You could never catch him doing any work. He was
either drinking coffee, was at the pub, or eating smelly food at his desk. But magically 100 lines
of bug-free and beautifully commented code appeared at the end of each day. Blow the compiled
finished code into a PROM and it would work right off. Damndest thing. I only once accused him that
his code didn't work. He asked what the symptom was, and immediately without noticeable pause and
looking over his pint of beer said "bit 4 of the third BCD switch from the left - the wire has
fallen off". He was of course absolutely right.
There are people like that. Not sure how he managed it.

Harvey



Craig


Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse)

Tam Hanna
 

Hello,

tried to get the guys email addy, but the Craigslist web site is not willing to let me in.


I would gladly pay for shipping. The 575 is the last of the Danaher curve tracers I still miss for my upgrade project.


Tam

--
With best regards
Tam Hanna
---

NEW: Enjoy electronics? Like seeing oscilloscopes get repaired? Please subscribe to my new YouTube channel -> http://www.youtube.com/user/MrTamhan


Re: 7854 vs 7D20

Daniel Koller
 

Dennis,
  Is that FFT program available to us?
  Dan

On Wednesday, December 13, 2017, 1:41:34 AM EST, 'Dennis Tillman' @Dennis_Tillman_W7pF [TekScopes] <TekScopes@...> wrote:

 
Hi Harvey and Cliff
,
The 7D20 is spec'd at 70MHz and 40MSamples/Sec. It is also GPIB compatible
so it is programmable.

The 7854 is also GPIB compatible but in addition it has its own built in
vector processing programming language. That was another thing that made the
7854 revolutionary when it came out. It was the first scope with its own
vector processing language. Unfortunately electronics engineers were
programming illiterate in those days and that feature actually discouraged
sales so Tek quietly stopped promoting it in their ads and in their
literature.

To this day I have not found more than a handful of 7854 programs in spite
of doing an exhaustive search of all of the EE magazines in the 1980s and
1990s. However, all that changed a few months ago when Holger Lubbin (a
member of TekScopes and a dedicated fan of the 7854) wrote what must be the
largest 7854 program ever written. It calculates the FFT of the signal
stored in the 7854 memory. Unfortunately the 7854 did not have floating
point math, a fast microprocessor, or lots of storage (3 things you need to
do an FFT) so it is not practical except as a proof of what the 7854 was
capable of.

Dennis Tillman W7PF

-----Original Message-----
Sent: Tuesday, December 12, 2017 8:25 PM
Subject: Re: [TekScopes] 7854 vs 7D20

On Wed, 13 Dec 2017 02:54:49 +0000, you wrote:

I already have a working 7854 and a good assortment of 7000 series
plug-ins. What would a 7D20 add that the 7854 cannot do or can only do
poorly or with difficulty? Is the 7D20 compatible with the 7854?

To the best of my knowlege, the 7D20 was used to add digital storage rather
specifically to the 7600 scopes, giving you a large screen digital scope. I
think that the digital bandwidth is about 20 Mhz or so.

With the additional processing in the 7854, the higher bandwidth, I can't
think of anything in particular the 7D20 would give you.

if you're looking for relative oddities, then a 7A42 logic plugin (4 trace,
dual width, somewhat of a logic analyzer, might be an idea.

Harvey

Cliff Carrie
------------------------------------
Posted by: Harvey White <madyn@...>
------------------------------------


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