One inch CRT info needed

S

Steve Nosko

Guest
I ran across what looks to be a "1 inch CRT".



Do these things use electrostatic deflection? My guess is that there are no
published datasheets like tubes, eh?

I took an all too short look at the wearables site(s), but saw nothing.



The source is unknown. Looks like it could be a camcorder viewfinder CRT.
(Do I need to take apart my old VHS camcorder viewfinder for ideas ??)



Dia .85 inch (21.6 mm)

Len. 2.8 inch (71 mm)



It has a standard 9-pin miniature base - probably not enough for
electrostatic.

The printing on side is not readable. Yellow ink (not etched) partly rubbed
off. It is hard to say, but looks like R then maybe 275. Possible logo
looks like a "N" then a stylized, backwards "B"



Pins 4-5 measure 4 ohms


--
Steve N, K,9;d, c. i My email has no u's.
 
"Steve Nosko" <suteuve.nosukowicuz@moutouroula.com> wrote in message
news:bv6jcf$fdh$1@newshost.mot.com...
I ran across what looks to be a "1 inch CRT".



Do these things use electrostatic deflection? My guess is that there are
no
published datasheets like tubes, eh?

I took an all too short look at the wearables site(s), but saw nothing.



The source is unknown. Looks like it could be a camcorder viewfinder CRT.
(Do I need to take apart my old VHS camcorder viewfinder for ideas ??)



Dia .85 inch (21.6 mm)

Len. 2.8 inch (71 mm)



It has a standard 9-pin miniature base - probably not enough for
electrostatic.

The printing on side is not readable. Yellow ink (not etched) partly
rubbed
off. It is hard to say, but looks like R then maybe 275. Possible logo
looks like a "N" then a stylized, backwards "B"



Pins 4-5 measure 4 ohms


--
Steve N, K,9;d, c. i My email has no u's.
Click to expand...

All the viewfinder CRT's I've seen are magnetic deflection. There were a few
very old CRT's which are electrostatic and look much like a normal radio
tube with a phosphored end, such as the 1DP1, those are quite valuable now.
 
On Tue, 27 Jan 2004 14:56:02 -0600 "Steve Nosko"
<suteuve.nosukowicuz@moutouroula.com> wrote:

I ran across what looks to be a "1 inch CRT".

Do these things use electrostatic deflection? My guess is that there are no
published datasheets like tubes, eh?
Click to expand...
If it is electrostatic you will be able to see the deflection plates
thru the glass.

I think if you go to the Sphere web side there are data sheets for a
number of CRTs there.

http://www.sphere.bc.ca

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------
 
Forgot to mention. Can't see inside. It is coated inside with what looks
like the aquadag coating. A dark grey opaque coating.

Thanks, Steve N.


"Jim Adney" <jadney@vwtype3.org> wrote in message
news:g7ge10hulgqml3dlqi844dmar1qqro6p83@4ax.com...
On Tue, 27 Jan 2004 14:56:02 -0600 "Steve Nosko"
suteuve.nosukowicuz@moutouroula.com> wrote:

I ran across what looks to be a "1 inch CRT".

Do these things use electrostatic deflection? My guess is that there are
no
published datasheets like tubes, eh?

If it is electrostatic you will be able to see the deflection plates
thru the glass.

I think if you go to the Sphere web side there are data sheets for a
number of CRTs there.

http://www.sphere.bc.ca

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------
Click to expand...
 
"Steve Nosko" <suteuve.nosukowicuz@moutouroula.com> wrote in message
news:bv8tq5$36q$1@newshost.mot.com...
Forgot to mention. Can't see inside. It is coated inside with what looks
like the aquadag coating. A dark grey opaque coating.

Thanks, Steve N.
Click to expand...

It's almost certainly a magnetic deflection viewfinder CRT.
 
"Jim Adney" <jadney@vwtype3.org> wrote in message
news:g7ge10hulgqml3dlqi844dmar1qqro6p83@4ax.com...
On Tue, 27 Jan 2004 14:56:02 -0600 "Steve Nosko"
suteuve.nosukowicuz@moutouroula.com> wrote:

I ran across what looks to be a "1 inch CRT".[...description
snipped...]
Click to expand...

]> I think if you go to the Sphere web side there are data sheets for a
number of CRTs there.

http://www.sphere.bc.ca
Click to expand...
I was already there. Nothing of the kind - larger CRTs yes. . Mag
diflection is more work to use it. Probably give up, unless I run across a
free, probably broken camcorder to tear apart. I have a 3BP1 I made into a
crude homebrew scope many years ago. It'll be easier to make this work.
I'd like to use it for a real-time Radio DFsystem. I have a nice HP
dual trace storage 100MHz scope I can use to debug the rest of the system
anyway. The 1"-er would be a nice touch though. Very "dashboard-able".

73
--
Steve N, K,9;d, c. i My email has no u's.
 
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