Hi all,
Can anybody tell me if those rectifiers are same with anode in centre pin.
One rectifier is connected to positive pin of two capacitors and same capacitors ground is connected to primary ground terminal.
second rectifier is connected to secondary ground of transformer.
Can anybody tell me if those rectifiers are same with anode in centre pin.
One rectifier is connected to positive pin of two capacitors and same capacitors ground is connected to primary ground terminal.
second rectifier is connected to secondary ground of transformer.
Attachments
One rectifier middle pin is connected to positive pins of two big rail caps which are connected in parallel.
Negative pins of two caps connected to primary ground.
Second rectifier middle pin is connected to secondary side ground of transformer.
So I want to know what rectifiers are the two.
Negative pins of two caps connected to primary ground.
Second rectifier middle pin is connected to secondary side ground of transformer.
So I want to know what rectifiers are the two.
One has to be the positive rectifier.
Do they read differently if you use diode-check mode?
Is either defective?
Do they read differently if you use diode-check mode?
Is either defective?
All 4 diodes shorted?
Does the secondary center tap of the transformer connect to B+?
Does any terminal of the two rectifiers connect to B+?
Does the secondary center tap of the transformer connect to B+?
Does any terminal of the two rectifiers connect to B+?
Yes all diodes shorted. Yes secondary centre tap is connected to B+.
Yes second rectifier centre pin is connected to B+
Yes second rectifier centre pin is connected to B+
The rectifier that has its center terminal connected to the positive rail caps is a positive rectifier.
If the center terminal of the other rectifier is connected to B+, it has to be a negative rectifier for the voltage to be able to flow from B+.
I know that they're marked 1640 and that would generally mean MUR1640CTx but the 1640 isn't available in a CTR. From the voltage on the rail caps, the MUR1620CT and MUR1620CTR may work.
This isn't definitive. Before powering up, apply B+ and ground and confirm that you have 12v on the rail caps (no remote).
Use a limiter/low-rated fuse when powering up and pulse remote a few times to confirm that the rail voltage is approximately as expected (less than rated voltage of caps).
Someone else may have definitive part numbers.
If the center terminal of the other rectifier is connected to B+, it has to be a negative rectifier for the voltage to be able to flow from B+.
I know that they're marked 1640 and that would generally mean MUR1640CTx but the 1640 isn't available in a CTR. From the voltage on the rail caps, the MUR1620CT and MUR1620CTR may work.
This isn't definitive. Before powering up, apply B+ and ground and confirm that you have 12v on the rail caps (no remote).
Use a limiter/low-rated fuse when powering up and pulse remote a few times to confirm that the rail voltage is approximately as expected (less than rated voltage of caps).
Someone else may have definitive part numbers.
You can use the rectifiers that Perry has given. They work just fine. Ont he MUR1620CT center pin connects to positive of rail caps and the MUR1620CTR center pins also connects to 12v input terminal. Should you wish to know how to put this amp in a service mode please PM me.