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Wattwerx Little Dragon, Руководство по обслуживанию

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Hugh’s Wattwerx

Little Dragon

b

User/Maintenance Manual

Use What Works!

Содержание Little Dragon

Страница 1: ...Hugh s Wattwerx Little Dragon b User Maintenance Manual Use What Works ...

Страница 2: ...ature costly to construct but if a lifetime of experience has taught me anything it s simply this Initial price is but a small part of the overall cost of ownership over the lifetime of a thing well made I ve heard it said that it s a poor craftsman who blames his tools and that is undoubtedly true Its corollary however is that the best craftsmen recognize the finest in tools Your choice speaks we...

Страница 3: ...Panel Controls Switches and Jacks Rear Panel Controls Switches and Jacks Master 13 Pentode Triode 13 Presence 14 Speaker 14 Bottom Chassis Components Overview 15 Mains Input 15 Mains Power 15 Mains Fuse 15 StandbySwitch 16 Warnings and Precautions 1 Warranty 2 Specifications 3 Overview 4 Hints and Tips 6 Quick Start Instructions 7 ...

Страница 4: ...Page 4 ...

Страница 5: ...maged pinched or abraded Never operate or store the amplifier in damp or wet conditions Never operate the amplifier without an appropriate loudspeaker connected Always unplug the amplifier when not in use Never attempt to bypass the fuse or operate with a fuse of other than the recommended value Only replace tubes with replacements of the identical type This amplifier is LOUD Exposure to high soun...

Страница 6: ...ovided above In the event of a claim Hugh s Wattwerx s sole obligation shall be replacement of the product DISCLAIMER OF WARRANTY EXCEPTFORTHELIMITEDWARRANTYPROVIDEDHEREIN TOTHEEXTENTPERMITTED BY LAW HUGH S WATTWERX DISCLAIMS ALL WARRANTIES EXPRESS OR IMPLIED INCLUDINGALLWARRANTIESOFMERCHANTABILITYAND ORFITNESSFORAPARTICULAR PURPOSE TO THE EXTENT THAT ANY IMPLIED WARRANTIES MAY NONETHELESS EXIST B...

Страница 7: ... A C Output power 40W RMS into 16 ohms Operation voltage 115V A C 60Hz Internal speaker NOS British made Celestion G8 Vintage 8 Internal speaker impedance 16 Ohms Internal speaker power handling 60W External speakers 16 ohm 60W min power handling Height 15 Width 12 Depth 4 1 2 Weight 40 pounds Covering Mojotone Brown Buffalo Tolex Cabinet cleaning Moist cloth dish washing liquid ...

Страница 8: ...tion it had to sound great for a multitude of styles and usages and had to pack adequate cojones to hang with a full band including an acoustic drummer Second it had to be compact I drive a Ford Escort so I need something I can easily stow in the tiny trunk along with my guitar case With knees not what they once were and many venues located atop flights of stairs I wanted to be able to grab my amp...

Страница 9: ...volume is required The main chassis is extra heavy 12 gauge aluminum while the smaller lower chassis is 14 gauge aluminum My goal of maximizing simplicity and portability meant foregoing such extraneous features as multiple channels foot switching and effects My view is that while these features may be nice to have particularly if size and weight are of no concern they are inherently extraneous to...

Страница 10: ...o use a high quality well shielded low capacitance cable between your instrument and the amplifier in order to prevent unwanted noise and ensure the highest quality tone 5 All of my amplifiers are designed and built for use by responsible adults Every control has great range and is extremely powerful so simply spinning everything up to its maximum setting is likely to result in unpleasant even pai...

Страница 11: ...tch is in the standby down position Examine the front panel and make sure 1 Volume control is set at low level 2 2 Tone controls are positioned at number 5 3 All boost switches are turned off AFTER confirming the above 1 Plug the power cable into a grounded 3 hole electrical receptacle 2 Plug your instrument into the front panel input jack 3 Set the controls to one of the quick start settings list...

Страница 12: ...ength variations resulting from guitar controls and picking dynamics Hi Boost The purpose of the Hi Boost switch is to compensate for the unequal treble attenuation normally associated with turning down the volume control This is accomplished by engaging a carefully chosen capacitor to bypass the volume control for hight frequencies only Thus it will have little or no effect when the volume contro...

Страница 13: ... frequencies more prominent Engaging the Low Boost will actually reduce the overall loudness of the output this is shown in the following graph For a more bass heavy tone you would normally engage this switch and raise the volume and or Master controls to compensate This is illustrated in the following graph ...

Страница 14: ...ifier will react similarly to a vintage non master volume amp that is you will be able to play quite loud while still maintaining a fairly clean sound and will not generate significant distortion unless you turn it up very loud This configuration is excellent for clean articulated styles such as jazz and some country and funk and is also perfect for those who prefer to rely on pedals to create the...

Страница 15: ... are illustrated in the following two graphs Treble The high end of the audio spectrum is controlled by the Treble Control Along with the Bass Control discussed next this component is implemented in a circuit known as a Baxandall Tone Stack The Baxandall filter is a classic well proven circuit somewhat more common in high fidelity components than musical instrument amps but nevertheless appearing ...

Страница 16: ...ontrol just described the Bass control is implemented as a component of a classic Baxandall filter Also like the Treble and Mid controls its specific effect will depend on your overall volume distortion level and the settings of the other tone controls Its effect is shown in the following graph Pulling the Bass Control bypasses both the Bass and the Treble controls and results in a significant boo...

Страница 17: ...ectrum is virtually unchanged Either way the choice is yours When engaged the master volume acts as a sort of governor setting the maximum volume of the entire amplifier It can be thought of as a counterpart to the Volume control to which it is conceptually coupled As discussed earlier turning the Volume control up increases not only volume but distortion overdrive as well throughout the preamp se...

Страница 18: ...ower end of the signal while leaving the high frequencies unaffected Negative feedback loops and hence presence controls are relatively rare in cathode biased power amplifiers such as that in the Little Dragon for a number of reasons For the most part this is simply a result of designers copying earlier designs however there are some functional reasons Most significant is that negative feedback ca...

Страница 19: ... or damage the ground pin Doing so could result in electrocution If you must connect to a two pin outlet first ensure that it grounded through the electrical box and if so use a suitable ground lift adapter Avoid using long extension cords Long cords may add enough resistance so that the voltage feeding your amp is significantly reduced This will negatively affect your tone Mains Power Switch Theh...

Страница 20: ... amp on it is advisable to begin with both switches in the downward position Then turn on the Mains Power switch wait approximately sixty seconds and then flip the standby switch upward into the operate position Like the power switch the standby switch interrupts both lines of the high voltage A C power before it reaches the rectifiers This approach is far safer than the more common approach of in...

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