I found this thread via google and have that power transformer. It is in a Guild Superbird which is a 70ish watt amp. I may be in need of one but I am still diagnosing the issues.
If you want to know any of the specs or which wires go to what I can take some pictures or annotate the guild schematic.
If you want to know any of the specs or which wires go to what I can take some pictures or annotate the guild schematic.
Hi everyone,
I recently found a few transformers and would appreciate some help identifying their potential use. Here's what I found:
The red to red wires have lower inductance and resistance: 1.33 ohms and 280 mH.
The orange and white wires measure 15 ohms and 1900 mH.
The black and red wires at the bottom also show around 15 ohms and 1900 mH.
I connected the red wires to 220V, but the transformer vibrates a lot and gets very hot. Does anyone have any insight on what this transformer might be used for, or if I might be doing something wrong?
Thank you in advance
I recently found a few transformers and would appreciate some help identifying their potential use. Here's what I found:
The red to red wires have lower inductance and resistance: 1.33 ohms and 280 mH.
The orange and white wires measure 15 ohms and 1900 mH.
The black and red wires at the bottom also show around 15 ohms and 1900 mH.
I connected the red wires to 220V, but the transformer vibrates a lot and gets very hot. Does anyone have any insight on what this transformer might be used for, or if I might be doing something wrong?
Thank you in advance
Attachments
Last edited:
It means you did something pretty dangerous. You should have asked for help before doing anything like that.
Unknown transformers may be investigated with a low voltage signal generator and an oscilloscope in order to determine turns ratios and phasing of windings. Probably the 1900mH windings are the primaries, with there being two of them so they can be wired for 120vac or 240vac. If you try to connect them up wrong you can make a bad short circuit.
Hi.I connected 12.5v to red red wires and see about 38v on orange and white cables . İt is about 3 times higher. Maybe it is 0-110-220v transformer which I see similar ones in my storehouse. I become wrong because I thought that red black red ones are 0-110-220v. And yes it is very dangerous because there is 660vac on the other side. İt seems it is a transformer which have 0-110-120-220-240v primary and about 2x18v secondary (red black red)
Regards
Regards
Okay, but a couple of points:
(1) you still need to be sure of the phasing of the primaries. Maybe the tap locations are enough to be sure. If you aren't sure and you connect them in the wrong relative phase then their fields will cancel and you will not have inductance to limit the current.
(2) The output you have is not 2x18v. Its 36v-CT. Two different things. With the former the secondary windings are isolated from each other, which can be an advantage. When the windings are internally connected so as to make for a Center-Tap, then you are more restricted in how you can use the windings.
One more point is that 660VAC is about 1.8kV peak to peak. The current could easily be enough to kill you instantly. Please don't take your mistake lightly.
(1) you still need to be sure of the phasing of the primaries. Maybe the tap locations are enough to be sure. If you aren't sure and you connect them in the wrong relative phase then their fields will cancel and you will not have inductance to limit the current.
(2) The output you have is not 2x18v. Its 36v-CT. Two different things. With the former the secondary windings are isolated from each other, which can be an advantage. When the windings are internally connected so as to make for a Center-Tap, then you are more restricted in how you can use the windings.
One more point is that 660VAC is about 1.8kV peak to peak. The current could easily be enough to kill you instantly. Please don't take your mistake lightly.
Yes I know it is CT 36v. We say it 2x18 in my country🙂 we say double 18v for seperate windings.
I will connect primaries in series and check if inductance doubles ( maybe 4 times? )