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Identify Vintage International Rectifier Part?

shrtrnd

Jan 15, 2010
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Anyone know what this part is? Found 15 of them in my parts stock, I'm thinking maybe a custom-made device that will go into the trash if I can't identify them. (Don't remember what they went into).
61-7029 (Nothing on Google)
International Rectifier El Segundo CA
From the stud end: Black(1), Yellow (2), Red (3), Yellow(4), Black (5)
Resistance readings:
Forward 1-2 1.2M Ohm/ Reverse Infinite Forward 2-3 86K Ohm/ Reverse DVM Reading Pulsing Forward 3-4 4.9M Ohm/ Rev .77M
Forward 1-3 1.47M Ohm/ Reverse Infinite Forward 2-4 5M Ohm/ Reverse 1M Ohm Forward 3-5 8.7M Ohm/ Rev 1.4M
Forward 1-4 6.35M Ohm/ Reverse Infinite Forward 2-5 9M Ohm/ Reverse 1.6M Ohm
Forward 1-5 10M Ohm/ Reverse Infinite
Thanks for taking a shot at this.
Update - Just Found Note In the Bottom of the bag:
'22BPS' (don't remember what that means)
From my line drawing:
AC Enters the two Yellow Pins (2 & 4)
Pins 1 & 5 tied together that becomes Negative Output
Pin 3 becomes Positive Output
66V max AC 50VDC 70mA
66V DC 35mA Cap Load Damned if I can remember what these things are.
 

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Delta Prime

Jul 29, 2020
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Multitap high power potentiometer
You can find them in old no longer useful electronic equipment RF stuff


1688916809110.png
 

Delta Prime

Jul 29, 2020
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Long tailed pair? Slap a scope on the input/output.
Differential amplifier?
Discreet.
Color coded dots.
Hmmm. It seems I am no longer useful (insert joke here)
And what do I mean no longer you never have been ( ha!)
 

shrtrnd

Jan 15, 2010
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The threaded stud is for mounting only. No variable adjustment on this contraption.
I don't know what other devices International Rectifier made in its early years.
I believe it's probably SOME type of rectifier assembly.
Unfortunately, I therefore think it may have been a special order assembly, just not sure.
I'll have to drag out my o'scope and see what happens.
Thanks kellys_eye, Delta Prime, and danadak
 

bertus

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Nov 8, 2019
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Hello,

What are the readings when you use the diode test of the Multimeter?
Also what are the readings between the two yellow wires (AC input as you say).

It could be a packed selenium rectifier.
Selenium rectifier_sams_metallic_5-7.jpg
It could be a diode array, that makes a bridge rectifier when you connect the two black wires.

Be carefull, when this type of rectifier is overloaded, a nasty smell will arise.
It will smell like rotten eggs.

Bertus
 

Delta Prime

Jul 29, 2020
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Hello,

What are the readings when you use the diode test of the Multimeter?
Also what are the readings between the two yellow wires (AC input as you say).

It could be a packed selenium rectifier.
View attachment 59805
It could be a diode array, that makes a bridge rectifier when you connect the two black wires.

Be carefull, when this type of rectifier is overloaded, a nasty smell will arise.
It will smell like rotten eggs.

Bertus
Absolutely brilliant!
 

shrtrnd

Jan 15, 2010
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Thanks bertus, I'll check this out as soon as I find time and will post the results.
Makes a lot of sense and explains International Rectifier's core dedication to 'rectifiers'.
I really appreciate your time and effort in trying to identify this component.
 

shrtrnd

Jan 15, 2010
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bertus nailed it.
It's a bridge rectifier. Kind of ingenious for an early self-contained assembly.
Thanks for solving this mystery for me.
bertus is one heck of an electronics sleuth.
 
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