transformer test 5 Sept 2023

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fortunately this didnt have more than three wires on the secondary side

green to green

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then each green to yellow/green

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 that last pic looks a little too close for comfort
 

I presume that yellow/green is the center tap....

time to read about center tap(s)

the two green went to a bridge rectifier

the yellow green went to an 8 pin chip...and back to the primary fuse holder....


hope you had a nice labor day weekend

 

[Tassieviking]

That would be the perfect setup for a 20-22v dc supply with -+ rails, usually the center tap is connected to ground as it becomes the 0v for the supply.
What did it come out off ?
Do you have a schematic of what it came out off ?

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thank you sir

it is from a metronome i brought home from my friends junk store

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it had a blown fuse

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when i replaced the fuse and powered on dbt it made a horrible louder than heck noise so it was instantaneously disconnected
and the bulb was burning BRIGHT

on my to do list : mount switch on my dbt!!! 

I suspected the bridge rectifier but when removed it tested good out of circuit

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so it has a short somewhere and there is no schematic

also there is a TO-3 ? that is $$$$$$$$  it may be good idk

I was hoping to fix it without bothering you guys ha ha (YEAH RIGHT    )

but i really like it

would be cool to use it playing guitar

\m/

[g1]

the yellow green went to an 8 pin chip...and back to the primary fuse holder....

If this is true, do not operate the unit.  The secondary and primary sides of transformer should never be connected.
The AC cord white and black should go to the primary (through the fuse and the power switch), and nowhere else.

If that fuse is on the primary side, the fuse holder should not connect to anything on the board.

It's worth a try to contact the company, you never know if they will supply schematic until you ask.
https://www.mcadamsinstruments.com/contact

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thank you sir

sorry for the false alarm

I went and looked and the trace simply runs beneath the plastic fuse holder

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it seems to run to a jumper connected to an input jack which snapped when i looked at it

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my apologies