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Light filters and Implosion shields info needed

 

Does any one or any place have comprehensive information on these two subjects 1: light filters 2: implosion shields "manufactured" by Tektronix?
I need engineering diagrams and or samples of no longer available parts.
--
Jeffeelcr
 

For light filters, you might look for information on them in the context of
optical filters used with cameras.

For Tektronix implosion shields, I would think that the primary
characteristics would be the same as the basic material (don't know which,
exactly; perhaps various different types of plastic?) and looking at the
specs for those would be useful.

------------------------
Dave (Nick) Daniel
KC0WJN
------------------------


On Thu, Nov 21, 2024 at 18:35 jeff_a_bowman@... via groups.io
<jeff_a_bowman@...> wrote:

Does any one or any place have comprehensive information on these two
subjects 1: light filters 2: implosion shields "manufactured" by Tektronix?
I need engineering diagrams and or samples of no longer available parts.
--
Jeffeelcr
 

Light filter dimensions: /g/TekScopes/files/Tek%207603%20&%207904%20CRT%20Filters.pdf

Sadly I don't have any 7000s to measure the thickness. A laser cutter and some acrylic would make near-perfect replicas.
 

I made one from a piece of blue acrylic I had on hand. It was either 1/16" or 1/8" thick. I don't remember but I think it was 1/16" Quite easy to make with a table saw and a sharp carbide blade.

Barry - N4BUQ

Light filter dimensions:
/g/TekScopes/files/Tek%207603%20&%207904%20CRT%20Filters.pdf

Sadly I don't have any 7000s to measure the thickness. A laser cutter and some
acrylic would make near-perfect replicas.
 

As I recall, the implosion shields are usually polycarbonate which is much stronger than acrylic (i.e. Plexiglass).
 

Nick, great thats two good ones.
Thickness on 378-0626-XX should be .030"...... -00 would be blue which no one makes anymore not to mention the other colors that are also only available in .250" thickness now.
--
Jeffeelcr
 

Dave, thanks good idea for background info.
--
Jeffeelcr
 

Clark, thanks that will need more research by me.
--
Jeffeelcr
 

Barry, yes and several other tools depending on which shapes there was so many.
--
Jeffeelcr
 

Nick, that should have been part number 378-0625-XX not 0626.
--
Jeffeelcr
 

I made it just for the diffusion and to match my other scopes. Hopefully I'll never have to depend on an actual implosion shield.

Barry - N4BUQ

As I recall, the implosion shields are usually polycarbonate which is much
stronger than acrylic (i.e. Plexiglass).
 

Use polycarbonate not acrylic ...

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Nick via groups.io
Sent: 23 November 2024 23:29
To: [email protected]
Subject: Re: [TekScopes] Light filters and Implosion shields info needed

Light filter dimensions: /g/TekScopes/files/Tek%207603%20&%207904%20CRT%20Filters.pdf

Sadly I don't have any 7000s to measure the thickness. A laser cutter and some acrylic would make near-perfect replicas.
 

I have used lexan sheets that I bought at a lowes store which is .093.
A laser cutter was used to cut to the dimensions that match the Tek
originals. After cleaning the lexan, I laminated theater lighting gels
to the plastic using a clear glue. It works nicely.
The only real difference is that the Tek original has little tits on the CRT
side to provide a little air space between the plastic and the CRT.
I also used some .080 plexiglass but I was unable to find more without
ordering a 2 x 3 foot sheet
Things to know:
The Tek shield is .078
Gam color 790 and 785 are close matches for the Tek blue.
Roscoe 63 is almost a perfect match for the Tek blue.
 

Dave, which model of laser cutter are you referring to? I plan to get one in the next year or so, and am starting to shop around.

??? Ideally, I'd like it to be able to handle metal (at least aluminum) as well as lighter stuff.

??? Thanks.

On 24-Nov-24 07:03, David Harrison via groups.io wrote:
I have used lexan sheets that I bought at a lowes store which is .093.
A laser cutter was used to cut to the dimensions that match the Tek
originals. After cleaning the lexan, I laminated theater lighting gels
to the plastic using a clear glue. It works nicely.
The only real difference is that the Tek original has little tits on the CRT
side to provide a little air space between the plastic and the CRT.
I also used some .080 plexiglass but I was unable to find more without
ordering a 2 x 3 foot sheet
Things to know:
The Tek shield is .078
Gam color 790 and 785 are close matches for the Tek blue.
Roscoe 63 is almost a perfect match for the Tek blue.
--
Bruce Lane, ARS KC7GR,
kyrrin@...
"Quando Omni Flunkus Moritati" (Red Green)
 

David makes a good observation about the air space created by the bumps on the CRT side of the shield. These bumps prevent Newton rings, an optical interference pattern. When two reflective surfaces touch in one or more points, but not all points, concentric rings appear surrounding the place where they touch. The ease in detecting the rings depends upon the wavelengths of light present. When a filter is used, it is much easier to see the rings.
 

On Sunday 24 November 2024 12:40:23 pm Bruce Lane via groups.io wrote:
??? Dave, which model of laser cutter are you referring to? I plan to
get one in the next year or so, and am starting to shop around.

??? Ideally, I'd like it to be able to handle metal (at least aluminum)
as well as lighter stuff.

??? Thanks.
Have a look at James Dean Designs on youtube, he deals with that stuff extensively, and provides a lot of good info...

--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
 

Sadly, I don't remember the model of the cutter, but I do know that it cost more than $20,000. It has what looks like a portable air conditioner connected which supplies cooled water to the cutter.
Of course, I don't own such a device. It is in the lab where I worked for 32 years!
David
 

I wonder if there are Maker spaces that have these?

------------------------
Dave (Nick) Daniel
KC0WJN
------------------------


On Sun, Nov 24, 2024 at 16:28 David Harrison via groups.io <harrison=
[email protected]> wrote:

Sadly, I don't remember the model of the cutter, but I do know that it
cost more than $20,000. It has what looks like a portable air conditioner
connected which supplies cooled water to the cutter.
Of course, I don't own such a device. It is in the lab where I worked for
32 years!
David
 

I think I uploaded a picture of the different blue filters. Not sure.
/g/TekScopes/photo/299124/3858507?p=Created%2C%2C%2C20%2C2%2C0%2C0
David
 

Have a bunch of Tek filters , perhaps shields.

Mostly 465/475, 7000, 576.

Can take measurements If needed.

Suggest you ask Qservice in Greece for the genuine Tek filters.

To DIY without a NC setup, find a Tap Plastic


Tap can pr¨¦cision NC to a sketch or dwg, from sheet stock.

Highly recommended

Jon

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