Allnic H-3000 hum when mute button engaged.


Hello Goner,
I have just purchased this wonderful phono preamp used. The unit is running perfectly and quietly. There is only one problem, that is when the mute button is engaged, my speakers hum badly on bith sides. Anyone got any idea on what happens. Also, when the button engaged and disengaged, it produce the pop sound. Is it the possibility that the mute button is malfunctioning? Can a simple deoxit fix it?
 Thanks 
Calvin
dangcaonguyen
Congratulations on the H-3000 and glad that you have it sorted out.  Now, find an HA-3000 to pair with it and kick that wonderful phono up to even greater heights! 
To answer your question regarding tubes, all of the stock tubes in the Allnic are NOS except the rectifier.  You already have a NOS RCA but other rectifiers that Albert suggested are Tung Sol, Valvo, Mullard, and Cossor.  Mullard will be warmer whereas the Tung Sol will be leaner. 
Thanks everybody. I am glad as nothing serious happened.
I am sure that I will do tubes rolling in the next few months. I am very satisfy with the sound i get with the RCA now. But who knows...
Thanks again.
Calvin