I should replace the big electrolytics in my guitar amplifier but I discover it use huge caps with three pins (with a triangular configuration) all pins are soldered, could I use standard two pins instead wich is the correct way of solder it???
Also in series with the speaker there's a parallel of two resistor of 4.7Kohm rated for 5W each (the amp is 50watt) putted here by some tecnichian or so... they are the big white square type of ones used in Xover, what do You think about?
Also in series with the speaker there's a parallel of two resistor of 4.7Kohm rated for 5W each (the amp is 50watt) putted here by some tecnichian or so... they are the big white square type of ones used in Xover, what do You think about?
There are electrolytics with three pins where the third pin is only for mounting on pcb, means it has no electrical connection.
And there are others where are two pins for + and one for -, so those are two caps in one package. Mostly to be found in older gear of the 70´s.
In the first case you can use any cap of equal or higher voltage and equal capacitance, a higher capacitance can be used if the caps are part of the psu.
In the second case you would need two caps with the above characteristics and tie the - pins together.
A circuit drawing or a photo would make things clearer ...
And there are others where are two pins for + and one for -, so those are two caps in one package. Mostly to be found in older gear of the 70´s.
In the first case you can use any cap of equal or higher voltage and equal capacitance, a higher capacitance can be used if the caps are part of the psu.
In the second case you would need two caps with the above characteristics and tie the - pins together.
A circuit drawing or a photo would make things clearer ...
This is a little italian vintage amplifier, if I remind well the center pin of each electolytic is connected at the same part so I think it's for a sort of caps shielding (since the caps have a alluminium shield) and the two caps are connected in series for the standard PSU configuration: V+ - 0 - V-
Late I will post a photo of the PCB, hope this helps...
No idea above the 2.35Kohm resistor in series with the load it's a common configuration?
Late I will post a photo of the PCB, hope this helps...
No idea above the 2.35Kohm resistor in series with the load it's a common configuration?
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.