Can you recommend the right tubes for me?  Yes we can advise you on which tubes will sound best for your amp based on the tone(s) you like.

Is there a charge to bias my amp?  To properly bias an amp is $45.00 and includes installation of tubes.

Can I send you tubes and will you install them?  Yes and the fee is $45.00.

Do you warranty your tubes?  Yes, Ruby Tubes are warranted for 180 days / 6 months. All other tube brands are warranted for 90 days / 3months.