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Amp Tech

Guitar amplifiers mods, maintenance and more.

Fender Mid Range Control Pot Mod

Add a Mid-Range Pot To Your Fender Amp

This file will show you how to add a mid range pot to your fender amp. Instead of adding a mid pot Fender often used a fixed 6.8 resistor instead. The 6.8k resistor is soldered to the bass pot (2 lug) wiper to (1 lug) ground with the (3 lug) left untouched. You can also replace the 6.8k resistor with a 10k resistor for more mids without a pot or a lower value for less mids.

2x12 Guitar Speaker Cabinet Mono/Stereo Wiring

2 x12 Mono/Stereo Speaker Wiring Diagram 8 or 16 ohm speakers

Wiring a 2x12 Guitar Speaker Cabinet with 1 x Stereo and 1 x Mono Jack. We will use 8 or 16 ohm guitar speakers. 4 ohm speakers are not recommended. Using 2 x 8 ohm speakers results in 8 Ohms to each channel in stereo or 4 ohms mono. Using 2 x 16 ohm speakers results in 16 ohms to each channel in stereo or 8 ohms mono. When mounting the jacks use 2 separate mounting jack plates mounted on a non-conductive surface.

Poor Mans Speaker Tester

Poor Mans Speaker Tester Diagram

We all will eventually be in a situation when our amp rig gives out, but how do we know if it's a blown speaker or your amp went bad. This simple test can be done without any kind of test equipment such as a meter. We will need the following: C or D Battery, 1/4" speaker cable and a spare wire.

Guitar Speaker Wiring Diagrams

Wiring Guitar Speakers

Wiring speakers incorrectly or using mismatched speakers will cause excessive wear to your power tubes or even cause damage to your tubes, speakers or even your amps transformers. In order to wire speakers correctly you will need to know the ohm and power rating of each speaker. As a general rule you should use matched speakers (Ohm and Power Rating (Watts) to prevent any damages.

Cleaning Tube Amp Sockets

Cleaning Tube Amp Tube Sockets

Did you know when you change your power or preamp tubes you should also clean your tube sockets as they oxidize over time and dust and debris can build up causing corrosion. To make sure the tubes pins are making good contact with the tube sockets you should use a good electronic contact cleaner such as DEOXIT D5 SPRAY CONTACT CLEANER AND REJUVENATOR every time you change your tubes.

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