MrSiki99
100+ Head-Fier
- Joined
- Nov 7, 2002
- Posts
- 430
- Likes
- 0
What would happen if I plugged a 24VAC power supply into the dc power supply jack of a meta42?
Broken Meta
- Thread starter MrSiki99
- Start date
MisterX
Headphoneus Supremus
- Joined
- Dec 30, 2002
- Posts
- 3,880
- Likes
- 23
Figure all of the active parts are cooked.
fewtch
Headphoneus Supremus
- Joined
- Jul 23, 2003
- Posts
- 9,559
- Likes
- 37
In the case of reverse polarity protection (and a bit of luck), it might just be a blown diode...
tangent
Top Mall-Fi poster. The T in META42.
Formerly with Tangentsoft Parts Store
- Joined
- Sep 27, 2001
- Posts
- 5,969
- Likes
- 58
It depends on what kind of reverse supply protection was used.
If it's a crowbar diode, bad things could happen if you beat on it like that 60 times a second. A crowbar is meant only for shorting a reversed DC supply.
If it's a series diode, though, you just get half-wave rectification through the diode. That and the op-amp rail caps combine to make a poor-quality unregulated DC power supply. I'd expect the amp to work in this situation, just with a lot of ripple on the rails, if the resulting voltage were high enough.
If there's no reverse protection, the chips are all fried. Dead, dead, dead.
If it's a crowbar diode, bad things could happen if you beat on it like that 60 times a second. A crowbar is meant only for shorting a reversed DC supply.
If it's a series diode, though, you just get half-wave rectification through the diode. That and the op-amp rail caps combine to make a poor-quality unregulated DC power supply. I'd expect the amp to work in this situation, just with a lot of ripple on the rails, if the resulting voltage were high enough.
If there's no reverse protection, the chips are all fried. Dead, dead, dead.
Users who are viewing this thread
