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I just did something incredibly stupid (fried amp content)

#21
Alexander said:
Ok - I just did something incredibly stupid and am embarrassed to even ask about, but here goes...

I just got a new Milkman Half and Half amplifier. Played it for about an hour and then decided to test it alongside another one of my amps.

The mistake I made - I actually plugged the speakon out of my DB751 into the speakon jack on the back of the Half and Half (instead of the cabinet). When I switched the DB751 off of standby, it immediately clicked back over to standby. When I realized what I had done, I tried to play through the Half and Half - and though it would power on, no sound comes out.

Obviously I fried something - just wondering what damage I may have done and if it is repairable. Maybe something hard to diagnose without looking at it, but just wanted to see. Clearly an expensive mistake - just not sure how expensive...

Heartbroken
Click to expand...
Was the Milk Man turned off at the time?
 
#25
Check to see if the amp has a fuse. Sometimes there's one next to the power cord on the amp. If its not there it may be one on the inside of the amp.

Most amps nowadays have some type of circuit protection. If you didn't see any smoke or it doesn't smell burned, I'm willing to bet your safe and it's just a fuse.

The DB751 has a protection feature built in which protected the amp when it sensed power where it should not have been. Hope this helps.
 
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#28
The exact same thing happened to me a several weeks ago when I plugged my ampeg svt 7 into my Sadowsky sa200.
Fortunately, I was aware I could do something very bad having both amps stacked and switching from one to the other.
So I decided to use only one very single power cord just in case....
This saved both my amps as nothing happened to my amps when I switched on the 7 pro plugged into the sa200 as the sa200 was not powered by any source of electricity.

I still thank myself for being so cautious :hyper:
 
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#29
Yeah, events eventuate (the euphemism for **** happens). Some years ago I was working on a small guitar amp making popular mods. The heater wire and the B+ wire were both the same color - brown. Well, you guessed it, with my bifocals I got them switched as the spade lugs on the board were close together as well. I might as well say I love the acrid smell of burnt electronics in the morning. Yes, totally and completely and irretrievably fried the board. I still keep the carcass with a 1X12 in it for a small extension cab for guitar.
 
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#30
baxter_x said:
The exact same thing happened to me a several weeks ago when I plugged my ampeg svt 7 into my Sadowsky sa200.
Fortunately, I was aware I could do something very bad having both amps stacked and switching from one to the other.
So I decided to use only one very single power cord just in case....
This saved both my amps as nothing happened to my amps when I switched on the 7 pro plugged into the sa200 as the sa200 was not powered by any source of electricity.

I still thank myself for being so cautious :hyper:
Click to expand...
You were lucky, it usually doesn’t matter if the other amp is powered up or not.
 
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#33
Sorry to hear about your amp.

Years ago my band was setting up a studio and dialing out the feedback in the monitors.
I leaned my bass against my cab (large 2X10), pickups facing speakers. Started to hear feedback and just
thought it was the monitors again. By the time I realized it was my bass making the feedback
one of the speakers destroyed themselves. Ordered replacement speaker and was ok after that.

The next time I blew the speakers I blew them all. Instrument cable had rubbed against the level knob on my overdrive pedal and turned it all the way up. Cab company out of business so couldn't order replacements.

Now use tape to keep the knobs in place on that pedal.
 
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#38
baxter_x said:
I think I'll make nightmares next night then.......

The other amp was not powered up and not plugged to any electrical source. So pretty much like a dead brick. Was I still lucky?
Click to expand...

Yes, you were still very lucky.
 
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#40
baxter_x said:
Wow......... Thinking that I was "that close" to fry my SA200 makes me feel really really really bad.
Click to expand...
Your SA-200 might survive given the output transformer and circuit topology providing some protection, but that too is a matter of luck.
 
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