Products > Test Equipment
Biggest oscilloscope tube
<< < (3/4) > >>
Gyro:
I don't know if big old circular radar tubes were electrostatic deflection (my personal definition of scope tube) or magnetic. They were a fair diameter though.
Fungus:

--- Quote from: nctnico on April 25, 2023, 09:42:19 am ---Big CRT TVs where pretty flat in relation to screen size so that reasoning doesn't fly.

--- End quote ---

You're the first person I've ever heard describe a CRT as "flat". I don't believe there was ever one that was less deep than is was wide.

We weren't talking about TVs though. TVs are much slower scanning than oscilloscopes so they have more time to deflect the beam.

More time = bigger deflection angle than a 'scope.


--- Quote from: nali on April 25, 2023, 09:59:27 am ---Ha... not everyone thinks like that. Some of the oldies here may remember these ->

--- End quote ---

I remember those.

I also remember these: rear projection TV
bdunham7:

--- Quote from: Fungus on April 25, 2023, 01:51:03 pm ---You're the first person I've ever heard describe a CRT as "flat". I don't believe there was ever one that was less deep than is was wide.

We weren't talking about TVs though. TVs are much slower scanning than oscilloscopes so they have more time to deflect the beam.

--- End quote ---

As mentioned, some scope applications are lower BW and television CRTs will display a BW of several MHz.  They're still oscilloscopes.

Later model large CRT televisions had pretty short tubes.  The trick was being able to deal electronically with the geometry issues.

https://hexus.net/ce/news/audio-visual/4947-samsung-unveils-hdtv-compatible-crt/
Wrenches of Death:

--- Quote from: bdunham7 on April 25, 2023, 02:04:41 pm ---
Later model large CRT televisions had pretty short tubes.  The trick was being able to deal electronically with the geometry issues.


--- End quote ---

Deflection method was the primary reason. Electrostatic deflection required a long/deep crt. Magnetic deflection, using a yoke, could function with a much, much shorter neck.

WoD

edavid:
I don't see the point of including magnetic deflection tubes, because obviously they can be very large.

This isn't a complete oscilloscope, but the largest electrostatic deflection CRT I know of was the HP 1321A 21" XYZ monitor.

I haven't seen that one in person, but I do have its smaller brother, the HP 1311A 14" 5MHz XYZ monitor.  It's pretty impressive.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod