[sdiy] Power Supply Supplier (wallwart type)

[Needham, Alan]

|-----Original Message-----
|From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-|bounces at dropmix.xs4all.nl] On Behalf Of James R.
Coplin
|Sent: 27 January 2010 07:04
|To: 'synthdiy DIY'
|Subject: [sdiy] Power Supply Supplier (wallwart type)
|
|My favorite Spring Reverb Unit wallwart just went up in a melted
|ball of smelly goo.  Dramatic.  Cracking open the melted husk
|reveals a transformer without any type of fuse.  I'm lucky my
|house didn't burn down!  
|
<Snip>
|
|James R. Coplin
|
|_______________________________________________

If you dig into the primary windings on the transformer, you will
probably find a thermal fuse - maybe not what you are expecting but it
should kill the circuit when the transformer gets to about 150C.
These fuses are non-resettable and difficult to dig out without
destroying the winding.
At least that's my findings on dissecting several of these things!

Alan

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