Author Topic: What this is?  (Read 984 times)

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Offline AndersJ

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What this is?
« on: August 05, 2018, 04:55:49 pm »
Does anyone know what this device is/does?


« Last Edit: August 05, 2018, 04:57:30 pm by AndersJ »
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Offline jeroen79

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Re: What this is?
« Reply #1 on: August 05, 2018, 05:37:55 pm »
Something that outputs 2 times more "cavins" than you put in?

Can you show some pictures of the insides?
 

Offline glarsson

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Re: What this is?
« Reply #2 on: August 05, 2018, 05:47:42 pm »
Or something that reduces the signal and the user should therefore multiply readings by two. Very confusing little box.
 

Offline iainwhite

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Re: What this is?
« Reply #3 on: August 05, 2018, 05:53:30 pm »
Some kind of RF attenuator ??
 

Offline Discotech

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Re: What this is?
« Reply #4 on: August 05, 2018, 05:56:29 pm »
Branson are/were an ultrasonic company, I wonder if cavin is their own term for measuring ultrasonic cavitation ?
 

Offline helius

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Re: What this is?
« Reply #5 on: August 05, 2018, 06:20:16 pm »
Cavins are a measure of relative cavitation activity. See https://www.mrclab.com/data/products/Cav-meter-2_OPR.pdf a cavitation meter.
Still unclear on what the device in the OP does. An attenuator?
 

Offline SeanB

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Re: What this is?
« Reply #6 on: August 05, 2018, 07:08:10 pm »
I would guess a 3dB attenuator, giving a voltage output half the input, so that you can keep a meter in range while you are having a higher voltage output from whatever detector you are using. Standard instrument box, if you undo the 4 screws and look inside there will be a simple voltage divider, probably using 3 resistors, to give the attenuation and provide the required input and output impedances constant, or there will be a small ferrite autotransformer in some cases where they have a well defined operating frequency and impedances.
 

Online DimitriP

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Re: What this is?
« Reply #7 on: August 05, 2018, 07:40:42 pm »
It's a patience test box.  It tests the amount of time before the four screws come off to take a peek inside. You just might be holding the record so far!!
   If three 100  Ohm resistors are connected in parallel, and in series with a 200 Ohm resistor, how many resistors do you have? 
 
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Offline tomato

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Re: What this is?
« Reply #8 on: August 05, 2018, 08:00:17 pm »
I would guess a 3dB attenuator, giving a voltage output half the input...

That would be 6 dB.
 

Offline AndersJ

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Re: What this is?
« Reply #9 on: August 06, 2018, 11:29:11 am »
The patience test box has now been taken apart before it was turned on.



Anders J
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"It should work"
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