Hi,
Ive had my NewYorkDave two bottle for about 3 years now and it's been great but recently it developed a big hum . I tracked it down to the 12av7 so I bought 2 NOS 12av7s and swapped out the bad tube. One of the new tubes sounded great, quiet with no hum, but the other new tube had a huge hum like before. What could be going on? Can I just expect that it's a roll of the dice for tubes?
Ive had my NewYorkDave two bottle for about 3 years now and it's been great but recently it developed a big hum . I tracked it down to the 12av7 so I bought 2 NOS 12av7s and swapped out the bad tube. One of the new tubes sounded great, quiet with no hum, but the other new tube had a huge hum like before. What could be going on? Can I just expect that it's a roll of the dice for tubes?