Hi, just got a used Fosgate Signature Phono V1 that is a little noisy and I am suspecting the tubes. Any suggestions if this is likely? Also, what brand were the stock tubes? The current tubes are:
V2,V1: 2x Jolinda 12AT7 WA USA
V3: 1x 6DJ8 Unison Research
V4: 1x Svetlana 12AX7
V5,V6: 2x Mullard 12AT7/ECC81 Russia
V7: 1x 6x4 USA
I would be grateful for any help. Thanks. Frank