Mesa/Boogie F-50 manuel d'utilisation

OO GI E B M ESA Owner's Manual Series[...]

Hello from the Tone Farm... YOU, the smart player and all around intuitive human, have put your trust in us to be your amplifier company. This is something we do not take lightly. Our reward is that we've made a classic amplifier and by choosing this amplifier, you have become part of the MESA family...Welcome! Our goal is to never let you dow[...]

FR ONT P ANEL: Contr ols & Switches REAR P ANEL: Contr ols / Switches / Connection Jac ks Precautions 0 Overview 1-2-3 Instant Gratification 2 GAIN 4 TREBLE 4 MID 4-5 B ASS 5 REVERB 5 MASTER 5-6 CH 1 & 2: CONT OUR SELECT SWITCH 6 ON/ST ANDBY & PO WER ON SWITCHES 5 FUSE 7 RECORD & PHONES 7 FX: SEND & RETURN 7 FX MIX CONTROL 8 SPE[...]

PRECA UTIONS & W ARNINGS Your MESA/Boogie Amplifier is a professional instrument. Please treat it with respect and operate it properly. USE COMMON SENSE AND ALWAYS OBSERVE THESE PRECAUTIONS: YOUR AMPLIFIER IS LOUD! EXPOSURE TO HIGH SOUND VOLUMES MAY CAUSE PERMANENT HEARING DAMAGE ! No user serviceable parts inside. Refer service to qualified pe[...]

OVERVIEW: Congratulations on choosing the F Series as your amplifier and welcome to the M esa/Boogie family! The new F S eries amplifiers combines high gain lead performance, an amazing mid-gain crunch or blues sound and a bold and beautiful clean sound in a simple 2 Channel, Three Mode, all-tube, hand-built package that begs to rock. This tidy for[...]

OVERVIEW: (Continued) darker than that of its lower power family members but posses a depth and punch found only in amps of this serious-gigging horsepower range. Our legendary 60/100 switch has been included and allows you to detune the power section to achieve the brighter , more clippable feel of the F-Series . F-Series amplifiers are crafted wi[...]

P AGE 3 OVERVIEW: (Continued) 4 OHM FX MIX 10% SILENT RECORDING MUTE SPKR ON 8 OHM COMBO SPEAKERS FUSE FOOTSWITCH SOCKET BELOW RCORD / PHONES STEREO / MONO FX SEND RETURN WARNING: Unplug power before replacing fuse or removing bolts mounting chassis. POWER FUSE 2A SLO BLO 120 V~ 60 Hz 2A 100% OOGI E B M ESA F-30 All Tube Amplifier Handbuilt in Peta[...]

GAIN: This is by far the most powerful control in each of the three different Modes that are activated by the Mode switch. It not onl y determines the overall gain amount, shape and sensitivity of the Mode selected...but it is also a powerful T one control. Genera lly speaking, whatever is dialed up here ultimately determines the Modes’ personali[...]

MID: (Continued) pressed, even feel to the strings and therefore less apparent resistance to the pick. As the MID control is increased, ( 1 1:00 through 1 1:30 ), the sound is rounded-out and filled-in with a focused mid attack appearing rather quickly . As you wou ld guess, the feel starts to change - becoming more resistant. Above this region the[...]

MASTER: (Continued) -rectly to a mixing board or recorder , this control will determine the amount of signal you will be sendi ng via this jack. In this application it is usually best to start with the MASTER controls set to ( 7:00 ) and gradually increase them to the proper level. This minimizes the possibility of blowing speakers or eardrums in t[...]

P AGE 7 FUSE: This is the A.C.’s ( Alternating Current ) main fuse and provides protection from outside A.C. fluctuations, as well as power tube failure damage. Should the FUSE blow , replace it with the same rating in a slo- blo type package. The domestic U.S. version requires a 2 Amp SLO-BLO FUSE. A power tube short or failure is often the caus[...]

FX MIX: This control determines the dry/wet blend of the FX Loop signal in relation to the unaffected signal. Set to 10% you will experience only the dry signal (no noticeable FX) and at a setting of 90% the entire signal will be wet (total effect.) For the best results...Set the mix of your effect to 100% wet. Then dial in the amount of ef fect th[...]

P AGE 9 INPUT TREBLE MID BASS REVERB GAIN POWER STANDBY ON ON MASTER CH1 FT SW . CH 2 CH CONTOUR F A CT OR Y SAMPLE SETTINGS TREBLE MID BASS REVERB GAIN MASTER CH1 FT SW . CH 2 CH CONTOUR INPUT TREBLE MID BASS REVERB GAIN MASTER CH1 FT SW . CH 2 CH CONTOUR INPUT TREBLE MID BASS REVERB GAIN MASTER CH1 FT SW . CH 2 CH CONTOUR INPUT TREBLE MID BASS RE[...]

P AGE 10 INPUT TREBLE MID BASS REVERB GAIN POWER STANDBY ON ON MASTER CH1 FT SW . CH 2 CH CONTOUR TREBLE MID BASS REVERB GAIN MASTER CH1 FT SW . CH 2 CH CONTOUR INPUT TREBLE MID BASS REVERB GAIN MASTER CH1 FT SW . CH 2 CH CONTOUR INPUT TREBLE MID BASS REVERB GAIN MASTER CH1 FT SW . CH 2 CH CONTOUR INPUT TREBLE MID BASS REVERB GAIN MASTER CH1 FT SW [...]

P AGE 1 1 EL84 12AX7 (4) V 4 V 3 V 2 V 1 PARTIAL VIEW OF CHASSIS BACK EDGE OF CHASSIS F-30 TUBE TASK CHART B A B A B A B A (Each 12AX7 contains two separate Triodes) MUTE SWITCH EL84 V1 A= Input Stage both Channels V1 B= Clean Channel V2 A= 2nd Input Stage bothChannels V2 B=Channels 2 & 3 Boost Stage V3 A=Channels FX Send V3 B= FX Return V4 A= [...]

P AGE 12 6L6 12AX7 (4) V 4 V 3 V 2 V 1 PARTIAL VIEW OF CHASSIS BACK EDGE OF CHASSIS F-50 TUBE TASK CHART B A B A B A B A (Each 12AX7 contains two separate Triodes) MUTE SWITCH 6L6 V1 A= Input Stage both Channels V1 B= Clean Channel V2 A= 2nd Input Stage bothChannels V2 B=Channels 2 & 3 Boost Stage V3 A=Channels FX Send V3 B= FX Return V4 A= V4 [...]

P AGE 13 6L6 PARTIAL VIEW OF CHASSIS BACK EDGE OF CHASSIS F-100 TUBE TASK CHART 12AX7 (4) V 4 V 3 V 2 V 1 B A B A B A B A (Each 12AX7 contains two separate Triodes) MUTE SWITCH 6L6 V1 A= Input Stage both Channels V1 B= Clean Channel V2 A= 2nd Input Stage bothChannels V2 B=Channels 2 & 3 Boost Stage V3 A=Channels FX Send V3 B= FX Return V4 A= V4[...]

TUBE NOISE & MICROPHONICS: Y ou may occasionally experience some form of tube noise or microphonics. Certainly no cause for alarm, this quirky behavior comes with the territory and the T one. Much like changing a light bulb, you don’t need a technician to cure these types of minor user serviceable annoyances and in fact, you’ll be amazed at[...]

DIAGNOSING PREAMP TUBE PROBLEMS: Because your amplifier is an all tube design, it is quite possible that you will at some point experience minor pre-amp tube noise. Rest assured - this is no cause for alarm and you can take care of the problem yourself in a matter of minutes by simply swapping tubes. Let us begin by saying; It is a “very good” [...]

into oscillation or start crackling or any other form of bizzare noise, it is considered normal and functional. BIAS ADJUSTMENT : (a continuing series) NOTE: An article written by Randall Smith that we thought you might find interesting. Here’s a question we often hear: “Why doesn’t M esa put bias adjustments in their amplifiers?” Well, the[...]

it doesn’t need to be adjustable.” BIAS ADJUSTMENT : (Continued) When you set the bias (whether it’s by selecting the right resistors, as we do, or adjusting a trimmer — which is quicker) what you are doing is establishing the correct amount of idle CURRENT that flows through the power tubes. But you can’t adjust the current directly , yo[...]

BIAS ADJUSTMENT : (Continued) tubes. The thinking is that adjusting the bias to each tube separately eradicates the inheren t differences between the tubes by insuring that the same current flows through each oneAgain, this has some merit .. but it’s st ill not as good as using tubes that are matched in the first place because compensating for th[...]

SPEAKER IMPEDANCE MA TCHING & HOOK-UP GUIDE: IMPEDANCE: Wiring up speakers to provide the most effective load and making sure that all of them are in phase will help in creating the best sound possible. This is not too difficult, as long as you understand a few things about loading and how to connect your speakers to provide an optimal resistiv[...]

SPEAKER IMPEDANCE MA TCHING & HOOK-UP GUIDE: (Continued) P ARALLEL: When wiring in parallel, the resistance of the speakers decreases. T wo 8 ohm speakers wired in ( hooked-up ) Parallel results in a 4 ohm load. It’s easy to calculate the effect of a resistive load when all the speakers are all the same resistance. It is really not suggested [...]

P AGE 21 1 2 5 4 4 Ohm Cabinet 3 8 OHM 4 OHM 4 OHM Partial back view of some Mesa amp 8 Ohm Cabinet SAFE MISMATCH WIRING SCHEMES...Amplifier to Speaker Cabinets 4 OHM 8 OHM 16 OHM Partial back view of amplifier 16 Ohm Cabinet 4 OHM 8 OHM 16 OHM Partial back view of amplifier 16 Ohm Cabinet SAFE MISMATCH 8 OHM 4 OHM 4 OHM Partial back view of amplif[...]

P AGE 22 8 OHM 4 OHM 4 OHM Partial back view of amplifier 8 Ohm Cabinet 8 Ohm Cabinet 6 8 Ohm Cabinet 16 Ohm Cabinet 8 4 OHM 4 OHM 8 OHM Partial back view of amplifier SAFE MISMATCH 8 OHM Partial back view of amplifier SERIES BOX 8 Ohm 4 Ohm 4 Ohm 4 Ohm Cabinet 4 Ohm Cabinet 4 OHM 4 OHM 8 OHM Partial back view of amplifier PARALLEL BOX 8 Ohm 16 Ohm[...]

P AGE 23 4 OHM 4 OHM 8 OHM Partial back view of amplifier 8 Ohm Cabinet 8 Ohm Cabinet SERIES BOX 16 Ohm 8 Ohm 8 Ohm 8 Ohm Cabinet 10 SAFE MISMATCH 12 4 OHM 4 OHM Partial back view of amplifier 16 Ohm Cabinet 16 Ohm Cabinet 11 8 OHM 8 Ohm Cabinet 16 Ohm Cabinet 16 Ohm Cabinet 4 OHM 4 OHM 8 OHM Partial back view of amp PARALLEL BOX 8 Ohm 16 Ohm 16 Oh[...]

P AGE 24 4 OHM 4 OHM 8 OHM Partial back view of amplifier 8 Ohm Cabinet 8 Ohm Cabinet SERIES BOX 16 Ohm 8 Ohm 8 Ohm 16 Ohm Cabinet 13 SAFE MISMATCH WIRING SCHEMES...Amplifier to Speaker Cabinets 4 OHM 4 OHM 8 OHM Partial back view of amplifier 16 Ohm Cabinet 16 Ohm Cabinet PARALLEL BOX 8 Ohm 16 Ohm 16 Ohm 16 Ohm Cabinet SAFE MISMATCH 14[...]

ON TRIODES, PENTODES & IRISHMEN: With apologies to Friends and Relatives from the Emerald Isle - who will make their appearance soon enough - the humor which follows is dedicated to the memories of Spec McAuliff and Fae (Rafael) McNally , two of the T rue Greats. As their numerical references suggest, the terms Diode, Triode and Pentode indicat[...]

the plate, electrons will flow only during the times when the plate is positively charged. During periods of negative plate charge, ON TRIODES, PENTODES & IRISHMEN: (Continued) electron flow is stopped and the space charge of electrons remains com- pressed in the area around the cathode. Thus a diode tube - one with a cathode and an anode - is [...]

P AGE 27 grid, they discover ...there’s almost nothing there. The path they’re on has them aligned to zing straight through the spaces BETWEEN ON TRIODES, PENTODES & IRISHMEN: (Continued) screen grid windings. So rather than a close and personal encounter , they just fly on past - and once they’re out that far , there’s no stopping them[...]

P AGE 28 FUSE HOLDER pt# 790347 SWITCHES pt# PILOT LIGHT BULB pt# JACK pt# ALL FRONT PANEL KNOBS 610120 POT pt# 593739 POT pt# 592794 POT pt# POT pt# 592738 593148 408115 SWITCH pt# 607303 601073 703110 593737 FRONT VIEW F SERIES JACK pt# KNOB pt# JACK pt# (all three) 618100 JACK pt# JACK pt# SWITCH pt# 600115 618100 618100 618100 408004 POT pt# RE[...]

The Spirit of Art in Technology OO GI E B M ESA Thank you for trusting MESA/Boogie to be your amplifier company. We wish you many years of toneful enjoyment from this handbuilt all tube instrument.[...]

1317 Ross Street Petaluma, CA 94954 USA Phone No. (707) 778-6565 Fax No. (707) 765-1503 The Spirit of Art in Technology[...]