Old 09-16-2014, 05:39 AM #3969
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Default Re: Game: Guess the mystery object !

It's definitely some type of plasma arc device.


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Old 09-16-2014, 05:49 AM #3970
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Default Re: Game: Guess the mystery object !

Aside from the small chamber it almost looks like a PVD source.
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Old 09-16-2014, 09:21 AM #3971
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Default Re: Game: Guess the mystery object !

Dr Evil is it a motorcycle helmet?
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Old 09-16-2014, 10:03 AM #3972
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Default Re: Game: Guess the mystery object !

Looks exactly like the aluminium cast engine blocks on original Saturn cars.
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Old 09-16-2014, 11:34 AM #3973
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Default Re: Game: Guess the mystery object !

I think starlight is on the right track, it looks like something that was cast using the "lost foam process". That's probably why it looks so much like foam.
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Old 09-16-2014, 01:29 PM #3974
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Default Re: Game: Guess the mystery object !

Quote:
Originally Posted by starlight View Post
Looks exactly like the aluminium cast engine blocks on original Saturn cars.
You even got the car brand right.

Quote:
Originally Posted by BowtieGuy View Post
I think starlight is on the right track, it looks like something that was cast using the "lost foam process". That's probably why it looks so much like foam.
I was going to say why it looked like that once somebody figured out what it was.

Lost-foam casting - Wikipedia, the free encyclopedia
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Old 09-17-2014, 12:47 AM #3975
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Default Re: Game: Guess the mystery object !

Quote:
Originally Posted by shokkunlasers View Post
@mariomaster I would guess it's a fusor with that nice purplish glow and round thick (maybe borosilicate) window
Nope, this is a sealed device.

Quote:
Originally Posted by The Lightning Stalker View Post
It's definitely some type of plasma arc device.
It is, but what purpose does it serve? (hint: not an indicator lamp or spectral source)
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Old 09-17-2014, 04:13 AM #3976
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Default Re: Game: Guess the mystery object !

Dr Evil --- It looks to me like a polishing wheel
for some metals.
HMike

What are we analyzing here?

Air filter ????
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Old 07-02-2016, 10:41 PM #3977
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Default Re: Game: Guess the mystery object !

Here's another one, but this time I have no clue what it is used for. From the circuity inside I believe it's supposed to generate a 5MHz tone.
And before you ask, I don't have an oscilloscope or a working frequency counter.

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Old 07-02-2016, 10:45 PM #3978
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Default Re: Game: Guess the mystery object !

If that's a positive column discharge through argon I'm seeing, then I'll take a guess that this is a cold-cathode regulator tube.
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Old 07-03-2016, 12:54 AM #3979
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Default Re: Game: Guess the mystery object !

Quote:
Originally Posted by douro20 View Post
Here's another one, but this time I have no clue what it is used for. From the circuity inside I believe it's supposed to generate a 5MHz tone.
And before you ask, I don't have an oscilloscope or a working frequency counter.
It could be just that, though 10 MHz is a fair bit more usual. I suppose there is a power connection somewhere on the other side of the case, but some pics of what's inside could clear it up.

These units have a number of applications. Some have a square wave output so lots of harmonics and are used to create a reference grid of frequencies to help tune radio receivers and such.
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Old 07-03-2016, 12:56 AM #3980
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Default Re: Game: Guess the mystery object !

A fuzz box for a guitar? Lol
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Old 07-03-2016, 04:47 AM #3981
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Default Re: Game: Guess the mystery object !

Here is a photograph of the inside. It reminds me very much of a simple crystal oscillator with a single transistor, a few passives and a 5MHz crystal. What it's for I don't know.
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Old 07-03-2016, 04:48 AM #3982
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Default Re: Game: Guess the mystery object !

Quote:
Originally Posted by trussmonkey25 View Post
A fuzz box for a guitar? Lol
At 5MHz? Definitely not. And it has no input, only an output...
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Old 07-03-2016, 02:06 PM #3983
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Default Re: Game: Guess the mystery object !

Looks like a 5 MHz marker to me, probably 1980s.

Probably not really a frequency reference or timebase since it's just an uncompensated crystal oscillator, but it will help you find 5/10/15/20/25 Mhz on an anlalog receiver.

Strange that there is no 'on' LED in it, though that would probably use more power that the oscillator for leds of the era.
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Old 07-03-2016, 09:35 PM #3984
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Default Re: Game: Guess the mystery object !

That RS battery is going to be worth something somday?!! Thanks for reviving this thread!
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