Transformer.

  • Thread starter Thread starter Nick_Black
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Nick_Black

Mirthmaker
ok, I don't know where else to put this post.

I have a mixer, but the transformer fell out, now this wouldn't be a problem if it used wires. but the transformer seemed to have been pushed onto 8 pins.
and the holes that they go into are indistinguishable on one side (it's not a plastic plug, rather the pins seem to be jammed into the coil.)
but some of the winding wires seem to have been broken. any one know how i could replace this the numbers on the transformer is
481-7847 on one side

and U54-015-F-N on the other
 
If the windings broke it's tough to figure out. Best bet is to contact the manufacturer and see if they have a replacement, or at least the specs of the transformer.
 
lol, yeah, thats a problem, the manufactuer wen't out of buisness years ago.
oh well, I might beable to get some ohm readings out of it (i think there are multiple coils) but I might have to "backwards think" the curcetry (it's a really simple board, cirquitry wise) but before I do that I'll probably go to my electronics dealer and see if the can figure out what type of transformer it is...

thanks for the reply anyway
 
although it wouldn't tell you how much current to buy ...you could check out the power supply to see what voltages are needed... depending on age it could have 9-18 volts for primary... 5 for any logic chips... 48 for phantom...etc... how many channels??? who's the manufacture???
 
16 ch. TANGENT (model 1602a).
those currents were indeed the one's I would be tracing back to see what voltages are needed, thanks for the info.
 
tangents were pretty cool... i worked on one back in the mid 70's... only 16 channels so probably not too bad with the current draw... though we dont know what chips they used so it's hard to say exactly.... have you opened it up fully???? how large (physically) was the original??? though not a great way to guage it will tell you a little about how much current was required... and the bottom line is the cosole would benefit from having more than was speced anyhow.... a stiffer supply is always an advantage IMO... this would make agreat board for a complete rebuild project...
 
I assume you meen the size of the transformer. 4.2 cmW x 3.5H x 3.9 cm (no coil) or 5.5 cm with coil. here's the schematic to the PWR supply. and if you wan't the schematic to the channal cards i could post them too (but I eally don't wan't to.

Schematic.bmp
 
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Well for the Doodle you posted (Not really a proper schematic) is seems that you will probably need a 2x15v AC transformer (or 15v,0v,15v Center tapped) as the power supply uses 15v Regulators and those are the only regulators that I can see in the power supply unless there is a Zener regulator in there somewere ,also the Cap Values are 16v and 25v which also points to a low Voltage power supply and if the Transformer only had 3 or 4 Secondary leads comeing off of it then it is most likely a simple 2x15v Transformer.....


Cheers
 
umm, sorry I don't usully work with transformers... would a 30v centre tappped work? or is that 15v, 0v, 15 that you were talking about.
 
Yes a 30v Center Tapped transformer (the same as 15v,0v,15v) ...

I don"t know what Va rateing the transformer would need, but I"m sure a 50vA would provide plenty of power and still be pretty small.....

Good luck
 
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