Le fat switch du blues junior

Nothing related to a Blues Junior here...

Extrait du manuel de service du Blues Junior (http://www.ampix.org/albums/userpics/10003/Blues_Junior.pdf)

J1 is a high-sensitivity input with an input impedance of about 1MΩ.

V1B is the first gain stage which also contains the "FAT" switch. The FAT feature is activated by grounding the node between bypass capacitor C3 and R9. Via the FAT switch (S1) or the optional footswitch, the junction of R52 and R54 can be grounded. With zero volts applied to the gate of Q1, the JFET will essentially ground C3, activating the FAT feature.

The other side...

Evidemment ça ne correspond pas à la version du schéma que j'ai pris comme base donc maintenant va falloir que je traduise les références...

Le reste quand même, ça donne des infos utiles:

The output of V1B couples to the VOLUME control (R7). The VOLUME control is actually a preamp overdrive control that adjusts the level of distortion. C2 attenuates high frequencies and C1 attenuates low frequencies at high distortion settings. This takes the edge off the distortion and prevents the speaker from flapping.

V1A provides a gain of about 40, and drives the tone control circuitry. After the tone controls, the signal is fed to V2B, which drives the MASTER volume control (R41). From the MASTER volume, the signal splits to feed the power amplifier and the Reverb.

Note the champ...

U1A makes up a typical solid-state reverb drive circuit. U1B is the reverb recovery or sense circuit, which drives the REVERB control (R51). The reverb signal is summed with the dry signal at C6, which couples to the input of the Phase Inverter (V3).

The output tubes (6BQ5/EL84) are arranged in a push-pull configuration that will produce fifteen (15 ) watts R.M.S. into eight (8) ohms @ 5% THD, 1kHz. The output bias is derived from the -15Vdc supply. The voltage divider at R31 & R37 determines the bias voltage (-10.7 Vdc). C14 filters the ripple to 1mV or less

The European languages are members of the same family. Their separate existence is a myth. For science, music, sport, etc, Europe uses the same vocabulary. The languages only differ in their grammar, their pronunciation and their most common words. Everyone realizes why a new common language would be desirable: one could refuse to pay expensive translators. To achieve this, it would be necessary to have uniform grammar, pronunciation and more common words.

This one ?

or this one ?

If several languages coalesce, the grammar of the resulting language is more simple and regular than that of the individual languages. The new common language will be more simple and regular than the existing European languages. It will be as simple as Occidental; in fact, it will be Occidental. To an English person, it will seem like simplified English, as a skeptical Cambridge friend of mine told me what Occidental is. The European languages are members of the same family. Their separate existence is a myth. For science, music, sport, etc, Europe uses the same vocabulary. The languages only differ in their grammar, their pronunciation and their most common words. Everyone realizes why a new common language would be desirable: one could refuse to pay expensive translators.

Raw nickel ages pretty fast