Mesa/Boogie LoneStar Amplifier Rear Panel, They could be worth their weight in gold someday

REAR PANEL:

WARNING: Unplug power before replacing fuse or removing bolts mounting

chassis FUSE SILICON FAN

DIODES ON

FUSE

POWER	FUSE	TUBE	FAN
120 V~	4 A	RECTIFIER	OFF
		TRACKING
60 Hz	SLO
4 A	BLO

First set sound with LOOP bypassed. Then set SEND & OUTPUT to 50% for unity gain. With LOOP IN, adjust

SEND to match FX.

Use OUTPUT for

RETURN level and live volume control.

				LONE STARMESA BOOGIE	ALL - TUBE
					AMPLIFIER
		SEND	RETURN	CH 2 REVERB CH 1	REVERB			BIAS SELECT
NORMAL				LOOP		CHANNEL	SOLO			SPEAKERS
				IN	BRIGHT			EL-34	EL-34
MIN							EXT
							SW
				HARD BYPASS	REV WARM			WHEN	6L6		SLAVE
SEND LEVEL										8 OHM4 OHM	4 OHM
								RED ON
TUBE LOCATIONS
								CAUTION: SWITCH MUST		HAND BUILT IN PETALUMA CA.
1 x 5U4	4 x 6L6
								MATCH TUBES IN USE

FUSE: This is the A.C.’s (Alternating Current) main fuse and provides protection from outside A .C. fl uctuations 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 4 amp Slo-Blo FUSE . A power tube short or failure is often the cause of a blown FUSE. ..Follow the cold start procedure mentioned in the ON/STANDBY switch section and watch the power tubes as you fl ip the STANDBY to the ON position. If a power tube is going bad or is arcing you will see it! Flip the STANDBY switch to Standby immediately and replace the faulty power tube and

WARNING:			the FUSE if necessary.
Unplug power
before replacing
fuse or removing
bolts mounting		DIODES
chassis	FUSE		If you see nothing abnormal as you switch the STANDBY on, it is possible that a power tube shorted tempo-
	FUSE
POWER	FUSE		rarily and blew the FUSE . If this is the case it may work again normally. To be safe, you might want to replace
			just the adjacent tube or all power tubes in the “shotgun” troubleshooting tradition and save the replaced set
120 V~	4 A	TUBE
		RECTIFIER
60 Hz	SLO	TRACKING	as spares. Spare fuses are a must for the fabled cord bag along with your spare tubes. Always carry both for
4 A	BLO

they could be worth their weight in gold someday.

RECTIFIER SELECT: Diodes / Tube Rectifier Tracking This two position toggle selects the type of rectifi er, Silicon Diodes or

Tube, to convert the voltage from AC to DC for the power supply. The LONE STAR incorporates a further improved version of our patented Switchable Rectifi er feature fi rst seen on the Dual and Triple Rectifier SOLO heads. It incorporates a Rectifi er Tracking™ feature that insures proper voltage is present at all times and improves reliability. This switch operates in tandem with the individual

WARNING:			Channel Power Select (50/100) switch located on the right side of the Front Panel.
Unplug power
before replacing
fuse or removing
bolts mounting			The Rectifi er Tracking feature monitors the Channels, determines their power status and automatically selects
chassis	FUSE	DIODES
	FUSE
			the proper rectifi er type - which ultimately assures the best sound. This provides optimization of the power
POWER	FUSE		settings, delivering a magical tube-rectifi ed power-sag vibe for the channel set to 50 watts - and a tighter,
120 V~	4 A	TUBE
60 Hz	SLO	RECTIFIER	bolder 100 watts of diode-rectifi ed authority for the channel set to full power.
		TRACKING
4 A	BLO

Selecting DIODES chooses the solid state diode rectifi ers which deliver maximum power and headroom, while tracking tighter and imparting a quicker transient response and bolder attack. When set to DIODES , both Channels will respond with this character regardless of their individual power settings on the Front Panel. Selecting TUBE RECTIFIER TRACKING engages the 5U4 rectifi er tube automatically (either or both channels) whenever the 50 watt selection is made on the Front Panel Channel Power Select switch. When switching to the opposite channel, if the Channel Power Select is set to 100 watts, the Diodes are automatically engaged to insure proper matching to the added load on the supply.

This innovative feature allows you to tune each channel for the ultimate power expression and feel. With this fl exibility you can switch between a high power, spanking clean rhythm sound in Channel 1- and a saggy brown, old school power clip for bluesy single note solo work with the DRIVE bypassed in Channel 2. Or conversely, set Channel 1 for a sweet low power clean sound and crank up the horsepower with the DRIVE active to articulate a high gain solo voice in Channel 2. Regardless of the way you choose to dedicate your Channels, you will fi nd this power section fl exibility a remarkable step forward toward your ultimate tone.

NOTE: Don’t forget the Front Panel AC switch incorporates the reduced voltage TWEED setting. This adds yet another dimension to the power expression scenario and can produce amazing results when combined with the TUBE RECTIFIER TRACKING feature. Be sure to experiment with these two features in combination with each other.

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