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Mystery tin resistor box

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enut11:

--- Quote from: Labrat101 on May 27, 2020, 04:33:13 pm ---My first question is where did you find it??
was it from an old Building?

 I think you are going to find a load of hand wound chokes inside . wound on bobbins.
 So be careful how much heat you apply as it will melt the wax coated coils .

Measure the Henry not resistance ..   :-DMM
 
  It is , Was a custom part.   The tin should give you a clue .. Its a Medical box . syringe box from early 1930..

--- End quote ---

I acquired it along with a lot of other bits and pieces and do not know the origin. No intention of breaking into it at this time.

Labrat101:
From the pin set out they are grouped
There is a space between the 2 groups
2 on top 4 on bottom.  Pins 1 & 2  (3)  6,7,8,9   Block 2#  3  (4)  (5)  to 10,11,12
Pins 1,2,3 & 5 have been connected solder used... bottom bank 7,8,9, -- 11,12
also 13 071 collates to the pins maybe a red herring.
This to me looks like the layout for controlled
Oscillator. Input at top and frequency are at the
Bottom . There well could be an old type cat's hair Crystal's OA81 and coils .
They will give these odd measurement . I think it's an old receiver home made. The 2 bottom pins with zero are the ground and plain or Arial . With a cap isolated. .
Make measurements with a signal gen start low 230hz on the to top measure at lower block
The number on the top is the wave length.
Your drawing did not make sense as all resistance. The low values are probably coils And the cap are not showing nor are the oscillators...
Also the box is hermetically sealed for a good reason . other wise it would have been screwed down.
There maybe an Old Vacuum tube that would also account for the light weight the post war tubes were in
Metal cans . 90v grid 6.3v heater. if it is an oscillator tube it will have a low heater voltage .
Have not see one for over 50++ years 
You will have to use all your resources. on this one . But its Not a resistance Box . >:D
But solve 1 block, first left top and the bottom 4 .




lowimpedance:
Okay the mystery tin box could very well be an 'esi ' custom resistor enclosure for a specialist application, see picture. Same pin count, although a slight difference in pin arrangement.
The only way to truly know is to crack out the dremel !  :D.
(sorry about the pic quality but the original was poor to start).

Labrat101:

--- Quote from: lowimpedance on June 02, 2020, 03:23:25 am ---Okay the mystery tin box could very well be an 'esi ' custom resistor enclosure for a specialist application, see picture. Same pin count, although a slight difference in pin arrangement.
The only way to truly know is to crack out the dremel !  :D.
(sorry about the pic quality but the original was poor to start).

--- End quote ---
Well Done .. Its A ESIAC   and can do advanced Algebraic Computing    :popcorn:
        And has gone though special Ageing process  . Put a scope on it and see if its still 2ppm
      The X, Y, & Z  are the 3 top pins . 
 Do you have a scope with 3 axis  ..?   you need an analogue Scope   :-+

 It maybe still under warranty  :-DD

   Have Fun it should give a nice output .  ;D

  PS Don't crack it open .. you will kill the old shellac that they use to use .

lowimpedance:
 :-//
Are you taking the piss??.
Did you supply the unit in question to enutt11 ??........ no you did not. Clearly you don't know its origin !.
What makes you so sure its what you say it is, cough up some proof rather than dismiss mine.
Here's a tip its not from the 1930's ok !.  ;)

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