Fender 65 Twin Reverb Preamp Tube Replacement

この修理ガイドは変更されています。最新の未承認バージョンに切り替えます。

はじめに

Preamp tubes play an important role in increasing sound volume. These devices are responsible for creating a slight increase in a sound wave to prepare it for further amplification from the power vacuum tubes. Because these two types of tubes work so closely together, it is important to check the preamp tubes along with the power tubes when the amplifier seems faulty.

必要な工具と部品

手順1 Preamp Tube

Fender 65 Twin Reverb Preamp Tube Replacement, Preamp Tube: 手順 1、 3の画像 1

Fender 65 Twin Reverb Preamp Tube Replacement, Preamp Tube: 手順 1、 3の画像 2

Fender 65 Twin Reverb Preamp Tube Replacement, Preamp Tube: 手順 1、 3の画像 3

Make sure to unplug the power cord!
Take off the back panel by unscrewing the four Phillips head screws on the back of the amplifier. You will find the six preamp tubes are the smaller ones on the right. (The picture only shows five of the six.)
Keep the screws in a safe place and mark what part they are for.

翻訳

手順2

Remove the metal casing by gently pressing up against the case and twisting to the right.

翻訳

手順3

Using the cloth, remove one tube by firmly grasping and gently pulling downwards.
Pulling directly downwards prevents damage to the hookup prongs at the bottom of the tube.

翻訳

手順4

Check the tube for any cracks in the glass. Also check to make sure the filaments are not burnt out.
If the tube is still functioning or to insert the replacement or, proceed to step five.

翻訳

手順5

Take the new replacement tube and insert it into the appropriate slot, making sure that the prongs at the end line up with the correct holes.
You should hear a click when the tube is secured in place.
Repeat these steps with the other three tubes if necessary.