Which tube is the reverb tube?

Fender Amp Preamp Tube Layout and recommendations

Fender 2 channel reverb amp preamp tube layout (as seen from the back of the amp)
Tube Designation	V6	V1
	12AT7	7025/12AX7A
Specified Function	Phase Inverter	First gain stage for channel 1

Which tube is the reverb tube in a deluxe reverb?

12AX7
The Deluxe Reverb is a 22-watt tube amplifier (at 8 ohms), powered by a pair (“duet”) of 7408/6V6GT power tubes, one GZ34/5AR4 rectifier tube, four 7025/12AX7 tubes for preamplification and tremolo oscillation, and two 6201/12AT7 tubes driving the reverb and phase inverter circuits.

What tubes do Fender amps use?

This is severe duty and will use up the tube’s cathode quickly. This tube need not be low-noise or nonmicrophonic. Some early models used 12AX7s or 7025s for this job, however we still recommend using a 12AT7 here. Reverb amps will also have an additional 12AX7 to reamplify the output from the spring.

How do I choose amp tubes?

For those just looking for a new set of tubes to get your amp back up and running, look into the tubes the amp came with and start from there. If you want the same sound, get the same or very similar tubes. If you want to experiment, try other brands or styles of the same type of tube.

What are tubes in tube amp?

Many valve amplifiers have two sets of tubes: preamp tubes and power tubes. The preamp tubes are the first set of tubes that receive the guitar pickup signal. Their work is to pre-amplify the guitar signal to a level that can be applied on the larger power tubes, and they also drive reverb or tremolo effects.

Can a 12AU7 replace a 12AX7?

You can interchange a 12AX7 with 12AT7, 12AU7, 12AY7 or 5751 as they are all the same pin structure, however they will each give you a different result in your amp. Each of these tubes has a different gain factor, which means some will give higher gain and others lower gain.