Amp parts
Tube amplifiers have service requirement frequently and the most often requested part is the Tubes.
What is the difference between preamp and power amp tubes?
The preamp tubes has smaller size, usually with 9-pins contact and placed in noval socket. These tubes used in the preamp section of tube amplifiers. The most often used preamp tube is 12AX7A or ECC83 type in guitar amplifiers. We have huge collection of Preamp Tubes of Tube Amp Doctor. The guitar amplifiers does not need the preamp tubes in matched pairs, but some of the single tubes has premium balanced selection for special replacement position as like phase driver position.
The Power Tubes are bigger in dimensions compared to preamp tubes and there are many types used in guitar amplifiers. The power tubes has 8-pins contact to place in octal socket. Usually it must have to change the power tubes of guitar amplifiers in matched pairs, but there are some exceptional amplifiers used single power tube. Most often used power tube types are EL34, 6L6, 6V6 and EL84. We have many different types of premium selected matched pair and quartet Power Tubes of Tube Amp Doctor.
Why should need tube replacement of guitar amplifiers require an expert service technician?
Some of the amplifiers need to adjust the Bias when the power tubes changes made. If you want to bias tube amplifiers just be aware that there are lethal voltages inside the chassis. E.g. 500V DC- which is an instant killer! So don’t mess inside your guitar amplifier unless you know what you are doing. Don’t touch anything inside with your bare hands even if the amp is switched off. High voltage capacitors retain their charge, sometimes for days, so always it is a must have to aim to bias tube amplifiers safely. The modern built tube amplifiers usually doesn't need bias adjustment and it is easier to change the power tubes in those amps than some older vintage style amps.
Premium Selected and matched tubes of TAD. Stageshop is distributor of TAD (Tube Amp Doctor) in Hungary and Central-Eastern European countries. We have all types of TAD selected tubes in stock. Also we have some OEM tubes by manufacturers as Sovtek, JJ and Svetlana. We offer free shipping to any EU country above 200,-Euro of order. If you are a dealer or service professional please contact us for dealer prices.