Hi everyone,
I have 2 Ecoplates IIs in my studio. One is noisier than the other. The noise is mechanically heard standing next to one of the amplifiers. It’s subtle but it’s later amplified by the pickups and would like both amps to be equal in noise if possible. The noisier amp had what looked to be a replaced power transformer. I purchased a NOS Stancor P-8671 so now both units have the same model. I don’t think it helped much but it was cheap.
Fuses are correct at 1 amp. And transformer doesn’t seem to be cooking. The exact measurements are +17.96 and -17.58 vdc. One regulator is Motorola and the other is a replacement from Korea in the noisier unit.
On the quieter one it’s 18.48 and -17.52 vdc. They are a different brand regulator in the quiet one altogether
Send and returns are set identical.
The only obvious difference in the power amp is there are bigger caps in the noisier amp. 2x 2200uf pairs as opposed to 2x 1000uf pairs in the quiet amp. The working theory is maybe there is more current being drawn in the noisier unit. Could this be contributing?
Any other thoughts are appreciated.
Jan
I have 2 Ecoplates IIs in my studio. One is noisier than the other. The noise is mechanically heard standing next to one of the amplifiers. It’s subtle but it’s later amplified by the pickups and would like both amps to be equal in noise if possible. The noisier amp had what looked to be a replaced power transformer. I purchased a NOS Stancor P-8671 so now both units have the same model. I don’t think it helped much but it was cheap.
Fuses are correct at 1 amp. And transformer doesn’t seem to be cooking. The exact measurements are +17.96 and -17.58 vdc. One regulator is Motorola and the other is a replacement from Korea in the noisier unit.
On the quieter one it’s 18.48 and -17.52 vdc. They are a different brand regulator in the quiet one altogether
Send and returns are set identical.
The only obvious difference in the power amp is there are bigger caps in the noisier amp. 2x 2200uf pairs as opposed to 2x 1000uf pairs in the quiet amp. The working theory is maybe there is more current being drawn in the noisier unit. Could this be contributing?
Any other thoughts are appreciated.
Jan