Date   

Re: c-12 camera

Dave / NR1DX
 

Besides almost no one uses enlargers anymore ...for that matter almost
no one uses scope cameras anymore :-)
Dave
manuals@artekmanuals.com

On 12/14/2017 3:36 AM, 'Craig Sawyers' c.sawyers@tech-enterprise.com
[TekScopes] wrote:

I would think the lens would make a nice enlarger lens...
flat field, very fast...

-Chuck Harris
I don't think so Chuck. They are optically designed for very close to
unity magnification, and hence
unity conjugates, and monochrome. If you use them for much higher
magnification they will be nothing
like flat field, and will be beset with just about every aberration in
the book. Even worse if you use
them for colour.

Craig

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


Re: c-12 camera

Craig Sawyers <c.sawyers@...>
 

I would think the lens would make a nice enlarger lens...
flat field, very fast...

-Chuck Harris
I don't think so Chuck. They are optically designed for very close to unity magnification, and hence
unity conjugates, and monochrome. If you use them for much higher magnification they will be nothing
like flat field, and will be beset with just about every aberration in the book. Even worse if you use
them for colour.

Craig


Re: Deane Kidd and the Metric System

Szabolcs Szigeti
 

Hi,
I think Matt Parker summarizes it well :-)  Are Imperial Measurements outdated? | Number Hub with Matt Parker | Head Squeeze


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Are Imperial Measurements outdated? | Number Hub with Matt Parker | Head...

In response to feedback from our awesome subscribers we asked Matt Parker to give us his guide to imperial measu...
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Szabolcs

On Thursday, December 14, 2017, 12:05:37 AM GMT+1, 'Dennis Tillman' dennis@ridesoft.com [TekScopes] <TekScopes@yahoogroups.com> 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@yahoogroups.com [mailto:TekScopes@yahoogroups.com]
Sent: Tuesday, December 12, 2017 11:13 PM
To: TekScopes@yahoogroups.com
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@tech-enterprise.com>
------------------------------------

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

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Re: 7854 vs 7D20

Holger Lübben
 

Hi Dan!

Yes, the FFT program is available. You'll find a link to a zip archive at the end of this message.
But the program needs some explanation.

The project was only a proof of concept and the program is a very limited prototype.
Some of the limits are:

- There is no error handling
- It's only tested on a 7854 with 8k of ram.
- Some sort of waveform scaling is missing, at the moment it works only with 1V/DIV
- It's very slow. Calculationg the FFT of a waveform with 128 points takes about 12 minutes.

The last point is the reason why I stopped the project. The 7854 is a fantastic scope - but the programming language has too many limits for this kind of calculation.


The zipfile contains 4 files:

1) fftprog.txt
the fft program for the 7854

2) inputwaveform_128_points.txt
My input waveform for testing

3) input.jpg
A screenshot of the input waveform

4) result.jpg
A screenshot of the correct result

And here is the link:

http://www.methodyn.de/fftprog.zip

Holger Lübben


Re: c-12 camera

Chuck Harris <cfharris@...>
 

Not so much the scope cameras, but rather the new
manufacture poloroid style 4x5 film.

Though I do recall seeing a scope camera being used
as the basis for one of the "steampunk" projects.

I would think the lens would make a nice enlarger lens...
flat field, very fast...

-Chuck Harris

snapdiode@yahoo.com [TekScopes] wrote:

Good grief, so just as I want to actually use a scope camera, they've become a hipster fashion accessory?





------------------------------------
Posted by: snapdiode@yahoo.com
------------------------------------


Re: c-12 camera

snapdiode@...
 

Good grief, so just as I want to actually use a scope camera, they've become a hipster fashion accessory?


Re: c-12 camera

Richard Knoppow
 

4x5 film is relatively easy to get, its Polaroid film that is
impossible. It was discontinued years ago. I don't remember the C-12
well but the photos of it I found on the web show it to have a Graflex
Graflok back, which took Graflex type holders (different than used on
Graphic and other press cameras) and also accessories like the various
Polaroid adapters.
The lenses were not outstanding, they were designed to be sharpest
at the distance from scope to film in the camera. They were made by
various companies, mostly Ilex (Ocillo-Paragon) and Wollensak
(Ocillo-Raptar). These used to show up as surplus very cheaply.
For sheet film I recommend Freestyle Photo in Los Angeles or B&H in
New York.


On 12/13/2017 5:47 PM, Daniel Koller kaboomdk@yahoo.com [TekScopes] wrote:

Maybe I don't understand that camera, but I don't see a film-back.
Presume it's 4x5, which is getting to be unobtanium. I used my last
shots up about 15 years ago, with 10 year old expired film, and it
still sort of worked.
dan
--
Richard Knoppow
dickburk@ix.netcom.com
WB6KBL


Re: c-12 camera

Chuck Harris <cfharris@...>
 

For so many years they were at throw away prices, film was obsolete,
and unavailable, and most got thrown away. Now those that remain are
rather rare. The art photography world has again shown interest in
the polaroid film, so it is once again being manufactured, but is a
cache item. Which means expensive.

-Chuck Harris

snapdiode@yahoo.com [TekScopes] wrote:


Re: Deane Kidd and the Metric System

 

On Wed, 13 Dec 2017 11:50:25 -0000, you wrote:

Half dollars, quarters, and nickels divide dollars into halves, quarters, and twentieths.

Posted by: David <davidwhess@gmail.com>
Well yes, but you have 100 pennies to the dollar, same as us to the pound. But we have other coins
too. The 2p(fiftieth), 5p (twentieth), 10p(tenth) 20p(fifth) and 50p(half) and £2(twice). There was
at one stage a 25p coin too (quarter). That doesn't make either you or us non-decimal for currency.
We just divide our decimal base currency whether US dollars or pounds sterling into convenient
chunks.

...

Even for those like me who were brought up with that system until age 15, it was complete madness.
Doing mental arithmetic with it was a nightmare.

Craig
The part I like is that when dimes, quarters, half dollars, and dollar
coins were silver, they all had a weight proportional to their value
so they could simply be weighed instead of counted.

This does not work anymore because dimes come in two different
weights.


Re: c-12 camera

Vince Vielhaber
 

I've seen them retro-fitted with a small USB camera. How well that would work for looking at a fast single sweep, I dunno. The last one I saw (somewhere on the web a couple of years ago) *claimed* it was fast.

Vince.

On 12/13/2017 08:47 PM, Daniel Koller kaboomdk@yahoo.com [TekScopes] wrote:


Maybe I don't understand that camera, but I don't see a film-back.
Presume it's 4x5, which is getting to be unobtanium. I used my last
shots up about 15 years ago, with 10 year old expired film, and it still
sort of worked.
dan

On Wednesday, December 13, 2017, 8:23:12 PM EST, Richard Solomon
dickw1ksz@gmail.com [TekScopes] <TekScopes@yahoogroups.com> wrote:


You offered too much.

73, Dick, W1KSZ

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



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




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Re: c-12 camera

snapdiode@...
 

Yeah, and the worst part is it just sold for 200$ apparently.


Re: c-12 camera

Ed Breya
 

If the C-12 is for 500 series, then the unit pictured is missing the CRT bezel mount too - I don't see anything there that looks like it could hook to a scope of any kind, actually. The mount is probably still attached to whatever scope the camera was used on, if it still exists.

Ed


Re: c-12 camera

snapdiode@...
 

From what I read the C-12 is for the 500 series and the C-5 for the 5000 series. There's a C-5 locally for 36$, just a metro ride away.


Re: 7854 vs 7D20

 

The primary operating difference is that the 7D20 operates as a real
time digital storage oscilloscope where the displayed waveform is
continuously updated while the 7854 literally stores the waveform for
later viewing and measurement. The 2252 works this way also.

Usually this means operating the 7854 in analog mode and then pressing
one of the waveform aquisition buttons to capture and store a waveform
for further display and processing.

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?

Cliff Carrie


Re: Digest Number 11817

Steve Lindberg
 

On the metric stuff, I remember some space hardware that didn't work since the measurements were wrong system.


Sent from my Virgin Mobile phone.

------ Original message------

From: TekScopes@yahoogroups.com

Date: Wed, Dec 13, 2017 16:48

To: TekScopes@yahoogroups.com;

Subject:[TekScopes] Digest Number 11817

[Yahoo! Groups] <https://groups.yahoo.com/neo;_ylc=X3oDMTJkMGEwNXRrBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBHNlYwNmdHIEc2xrA2dmcARzdGltZQMxNTEzMjEyNDg2>
All about classic Tektronix CRT o'scopes Group <https://groups.yahoo.com/neo/groups/TekScopes/info;_ylc=X3oDMTJkaGk5bzg3BF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBHNlYwNoZHIEc2xrA2hwaARzdGltZQMxNTEzMjEyNDg2>
15 Messages
Digest #11817
1a
Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse) by "Tam Hanna" tamhan@tamoggemon.com
1b
Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse) by wa2dvu
2a
Re: 7854 vs 7D20 by "Harvey White" madyn48
3a
Re: Deane Kidd and the Metric System by "Craig Sawyers" craig_sawyers
3b
Re: Deane Kidd and the Metric System by "David C. Partridge" david_c_partridge
3c
Re: Deane Kidd and the Metric System by "Dennis Tillman" putz_with_ear_lappers
3d
Re: Deane Kidd and the Metric System by "Chris van Lint"
3e
Re: Deane Kidd and the Metric System by "Dave Seiter" componenx
4
Progress report on move to Groups.io by "Dennis Tillman" putz_with_ear_lappers
5a
Tektronix 2213a manual with single page schematic diagrams by gonio.david@gmail.com
5b
Re: Tektronix 2213a manual with single page schematic diagrams by "Sigurður Ásgeirsson" tinkerer138
5c
Re: Tektronix 2213a manual with single page schematic diagrams by "Ted Rook" ted_rook
5d
Re: Tektronix 2213a manual with single page schematic diagrams by "Artek Manuals" nr1dx@ymail.com
5e
Re: Tektronix 2213a manual with single page schematic diagrams by "Tom Jobe" tom_jobe
6
c-12 camera by snapdiode

Messages
1a
Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143794;_ylc=X3oDMTJzcm44MDVxBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NARzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNTEzMjEyNDg2>
Wed Dec 13, 2017 7:12 am (PST) . Posted by:
"Tam Hanna" tamhan@tamoggemon.com <mailto:tamhan@tamoggemon.com?subject=Re%3A%20Tektronix%20Type%20575%20Transistor%20Curve%20Tracer%20-%20%2475%20%28Syracuse%29>
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

Reply to sender <mailto:tamhan@tamoggemon.com?subject=Re%3A%20Tektronix%20Type%20575%20Transistor%20Curve%20Tracer%20-%20%2475%20%28Syracuse%29> . Reply to group <mailto:TekScopes@yahoogroups.com?subject=Re%3A%20Tektronix%20Type%20575%20Transistor%20Curve%20Tracer%20-%20%2475%20%28Syracuse%29> . Reply via Web Post <https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/143794;_ylc=X3oDMTJzNTRla2dlBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NARzZWMDZG1zZwRzbGsDcnBseQRzdGltZQMxNTEzMjEyNDg2?act=reply&messageNum=143794> . All Messages (3) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143791;_ylc=X3oDMTM5NXJwbnQ1BF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NARzZWMDZG1zZwRzbGsDdnRwYwRzdGltZQMxNTEzMjEyNDg2BHRwY0lkAzE0Mzc5MQ--> . Top ^
1b
Re: Tektronix Type 575 Transistor Curve Tracer - $75 (Syracuse) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143801;_ylc=X3oDMTJzcW84NmJyBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0MzgwMQRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNTEzMjEyNDg2>
Wed Dec 13, 2017 2:47 pm (PST) . Posted by:
wa2dvu <mailto:bill.riches@verizon.net?subject=Re%3A%20Tektronix%20Type%20575%20Transistor%20Curve%20Tracer%20-%20%2475%20%28Syracuse%29>
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@yahoogroups.com [mailto:TekScopes@yahoogroups.com]
Sent: Wednesday, December 13, 2017 10:12 AM
To: TekScopes@yahoogroups.com
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]

Reply to sender <mailto:bill.riches@verizon.net?subject=Re%3A%20Tektronix%20Type%20575%20Transistor%20Curve%20Tracer%20-%20%2475%20%28Syracuse%29> . Reply to group <mailto:TekScopes@yahoogroups.com?subject=Re%3A%20Tektronix%20Type%20575%20Transistor%20Curve%20Tracer%20-%20%2475%20%28Syracuse%29> . Reply via Web Post <https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/143801;_ylc=X3oDMTJzamhnczRiBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0MzgwMQRzZWMDZG1zZwRzbGsDcnBseQRzdGltZQMxNTEzMjEyNDg2?act=reply&messageNum=143801> . All Messages (3) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143791;_ylc=X3oDMTM5M2JpZHJvBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0MzgwMQRzZWMDZG1zZwRzbGsDdnRwYwRzdGltZQMxNTEzMjEyNDg2BHRwY0lkAzE0Mzc5MQ--> . Top ^
2a
Re: 7854 vs 7D20 <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143795;_ylc=X3oDMTJzY2hldmN1BF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NQRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNTEzMjEyNDg2>
Wed Dec 13, 2017 7:13 am (PST) . Posted by:
"Harvey White" madyn48 <mailto:madyn@dragonworks.info?subject=Re%3A%207854%20vs%207D20>
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
Reply to sender <mailto:madyn@dragonworks.info?subject=Re%3A%207854%20vs%207D20> . Reply to group <mailto:TekScopes@yahoogroups.com?subject=Re%3A%207854%20vs%207D20> . Reply via Web Post <https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/143795;_ylc=X3oDMTJzYTA2Y3UxBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NQRzZWMDZG1zZwRzbGsDcnBseQRzdGltZQMxNTEzMjEyNDg2?act=reply&messageNum=143795> . All Messages (9) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143765;_ylc=X3oDMTM5dWRvdTdvBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NQRzZWMDZG1zZwRzbGsDdnRwYwRzdGltZQMxNTEzMjEyNDg2BHRwY0lkAzE0Mzc2NQ--> . Top ^
3a
Re: Deane Kidd and the Metric System <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143796;_ylc=X3oDMTJzMXRzc2trBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NgRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNTEzMjEyNDg2>
Wed Dec 13, 2017 8:51 am (PST) . Posted by:
"Craig Sawyers" craig_sawyers <mailto:c.sawyers@tech-enterprise.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System>
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

Reply to sender <mailto:c.sawyers@tech-enterprise.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System> . Reply to group <mailto:TekScopes@yahoogroups.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System> . Reply via Web Post <https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/143796;_ylc=X3oDMTJzZ3NuOWZpBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NgRzZWMDZG1zZwRzbGsDcnBseQRzdGltZQMxNTEzMjEyNDg2?act=reply&messageNum=143796> . All Messages (16) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143773;_ylc=X3oDMTM5ZjcyNHRhBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NgRzZWMDZG1zZwRzbGsDdnRwYwRzdGltZQMxNTEzMjEyNDg2BHRwY0lkAzE0Mzc3Mw--> . Top ^
3b
Re: Deane Kidd and the Metric System <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143797;_ylc=X3oDMTJzOGZtNDZ2BF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NwRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNTEzMjEyNDg2>
Wed Dec 13, 2017 9:22 am (PST) . Posted by:
"David C. Partridge" david_c_partridge <mailto:david.partridge@perdrix.co.uk?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System>
Not forgetting the Guinea (£1 1s 0d == 1.05 in new money) ...

Dave

-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com]
Sent: 13 December 2017 13:44
To: TekScopes@yahoogroups.com
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@onetel.com [TekScopes] <TekScopes@yahoogroups.com> 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@gmail.com>
------------------------------------

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

Yahoo Groups Links

Reply to sender <mailto:david.partridge@perdrix.co.uk?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System> . Reply to group <mailto:TekScopes@yahoogroups.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System> . Reply via Web Post <https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/143797;_ylc=X3oDMTJzYWQ4bGpvBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NwRzZWMDZG1zZwRzbGsDcnBseQRzdGltZQMxNTEzMjEyNDg2?act=reply&messageNum=143797> . All Messages (16) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143773;_ylc=X3oDMTM5NDc4ZGhiBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0Mzc5NwRzZWMDZG1zZwRzbGsDdnRwYwRzdGltZQMxNTEzMjEyNDg2BHRwY0lkAzE0Mzc3Mw--> . Top ^
3c
Re: Deane Kidd and the Metric System <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143802;_ylc=X3oDMTJzMmRqZGhmBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0MzgwMgRzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNTEzMjEyNDg2>
Wed Dec 13, 2017 3:05 pm (PST) . Posted by:
"Dennis Tillman" putz_with_ear_lappers <mailto:dennis@ridesoft.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System>
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@yahoogroups.com [mailto:TekScopes@yahoogroups.com]
Sent: Tuesday, December 12, 2017 11:13 PM
To: TekScopes@yahoogroups.com
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@tech-enterprise.com>
------------------------------------

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

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Reply to sender <mailto:dennis@ridesoft.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System> . Reply to group <mailto:TekScopes@yahoogroups.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System> . Reply via Web Post <https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/143802;_ylc=X3oDMTJzNXZ1dHI3BF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0MzgwMgRzZWMDZG1zZwRzbGsDcnBseQRzdGltZQMxNTEzMjEyNDg2?act=reply&messageNum=143802> . All Messages (16) <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143773;_ylc=X3oDMTM5ajdjdTlpBF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0MzgwMgRzZWMDZG1zZwRzbGsDdnRwYwRzdGltZQMxNTEzMjEyNDg2BHRwY0lkAzE0Mzc3Mw--> . Top ^
3d
Re: Deane Kidd and the Metric System <https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/143804;_ylc=X3oDMTJzYWt1ZHE5BF9TAzk3MzU5NzE1BGdycElkAzIxOTEyNDcEZ3Jwc3BJZAMxNzA1MDgzNjYzBG1zZ0lkAzE0MzgwNARzZWMDZG1zZwRzbGsDdm1zZwRzdGltZQMxNTEzMjEyNDg2>
Wed Dec 13, 2017 3:20 pm (PST) . Posted by:
"Chris van Lint" <mailto:chrisvanlint@bigpond.com?subject=Re%3A%20Deane%20Kidd%20and%20the%20Metric%20System>
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@yahoogroups.com [mailto:TekScopes@yahoogroups.com]
Sent: Tuesday, December 12, 2017 11:13 PM
To: TekScopes@yahoogroups.com
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@tech-enterprise.com>
------------------------------------

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Yahoo Groups Links


Re: c-12 camera

 

4x5 film is still readily available. The instant film is $20-$25 for a 10
sheet pack, regular wet-developing film $35 or so for 25 sheets at B&H
Photo.

On Wed, Dec 13, 2017 at 8:47 PM, Daniel Koller kaboomdk@yahoo.com
[TekScopes] <TekScopes@yahoogroups.com> wrote:



Maybe I don't understand that camera, but I don't see a film-back.
Presume it's 4x5, which is getting to be unobtanium. I used my last shots
up about 15 years ago, with 10 year old expired film, and it still sort of
worked.
dan


Re: c-12 camera

Ed Breya
 

That one shown is a way over-priced (by 25-50x) hulk of a camera, and I think it's too new to fit the old 500 series round bezels anyway - and I think it's missing some parts too (the Polaroid film back, for one). You may be able to find the right kind of CRT mount eventually, but it's easier to find the more modern kind that hang from the slot in the top of the rectangular bezel. You can rig up some sort of adapter to fit the oldies, with banana plug mounts, or a flange to replace the bezel for picture taking.

With patience you should look for a nice light weight C-5 type for cheap ($5-10) or free. I've collected a few over the years. On the first one I ripped out the film back, lens, and flash, and mounted a USB PC camera. One of these days I plan to do the same with another, but instead of an attached USB camera, it will have a little mounting shelf on it to hold a phone-camera in the right position - no wires or PC needed, except to get the shots out of the phone later. For the oldies, you can probably just hold a modified C-5 against the front of the scope to steady it and space it properly.

With a steady hand and subdued lighting, you don't even need a camera box to get pretty decent screen shots.

Ed


Re: c-12 camera

snapdiode@...
 

In any case, this seller seems to be on some heavy drugs or something, the prices are insane, yet they have feedback! They sell!


Re: c-12 camera

Daniel Koller
 

Maybe I don't understand that camera, but I don't see a film-back.  Presume it's 4x5, which is getting to be unobtanium.   I used my last shots up about 15 years ago, with 10 year old expired film, and it still sort of worked.  
dan

On Wednesday, December 13, 2017, 8:23:12 PM EST, Richard Solomon dickw1ksz@gmail.com [TekScopes] <TekScopes@yahoogroups.com> wrote:

 
You offered too much.

73, Dick, W1KSZ

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


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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.

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