Electronics > Beginners

Hooked audio amplifier to my scope and amp died

(1/2) > >>

ghinckley68:
I got the ground to earth part. But how does one hook an amp up to a scope?

oPossum:
It is a bridged (BTL) amp? That would require a differential probe or using two probes and the math feature of the scope.

ataradov:
What exactly did you hook up?  It is pretty easy to kill the scope with incorrect probing. But killing the device under test is much harder. So we'll need a detailed explanation of what you did.

IanB:
I believe a few audio amplifiers used to have a problem being operated without a load, although I think modern designs have protection against this. If you connect an unprotected amplifier to the high impedance inputs of a scope then you are effectively operating the amp with no load, and this may damage it.

Also, it may be that the outputs of a mains powered audio amplifier are not meant to be connected to mains ground, and this will happen if you connect to the ground terminal of a scope.

supperman:
Either you got the polarity wrong.. or the amp does not use a ground (i.e. both wires swing).

Basically you shorted the amp out by connecting it to the ground terminal on the Scope. As mentioned above you needed to hook the one wire to one port and the other to another scope cannel. (or use a differential probe)

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod