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DHA ValveTone VT1 Mk3 Hi-Plate Bass
Submitted on October 24, 2005.
DHA ValveTone VT1 Mk3 Hi-Plate Bass for sale on eBay:
Pictures
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Controls
- Level
- sets the output level of the effect to your amplifier, there is a fair amount of gain generated by the valve and op-amp and this will overdrive the input of your guitar amplifier.
- Gain
- sets the level into the second stage of the valve and hence the level of gain. Use your volume control on your guitar to control the gain on the first stage of the valve, you will find that the ValveTone 1 Hi-Plate Bass responses very well to this and you can control the break-up distortion like this.
- Clip (switch)
- is neat trick you won’t have seen before on this type of effect. In the centre position (None) there is no clipping selected and the only clipping heard at higher gains is the valve soft chipping. The Si position connects two Silicon diodes across signal path to produce a harder Fuzz type clipping. The Ge position switches in 4 Germanium diodes, this is a much softer clipping, please note because the Germanium diodes reverse voltage is much lower than Silicon the volume we drop. There is an op-amp in the pedal which boosts the output level, the amount of clean volume can be adjusted using the pre-set pot which can be found inside box on the veroboard.
Various
- the manual about the ValveTone 1 Hi-Plate Bass:
The ValveTone 1 Hi-Plate Bass uses a single 12AX7 (ECC83) valve to generate classic pure valve tones. There are two modes of operation, overdrive and clipping distortion which also has 2 separate options of clipping. The ValveTone 1 Hi-Plate Bass is a low to medium gain effect and is intended to be used in front of a valve amplifier, but will also work well with solid state amps. The foot switch provides a true by-pass.
The ValveTone 1 Hi-Plate Bass is fitted with 2.1mm external PSU adaptor for use with a 12v @ 1200mA external supply. The user should use a well regulated external supply as the better the regulation then the less the hum when at higher gain levels. The inner of the connector is the positive, there is reverse polarity protection so no harm will be done if you get it wrong. There is a voltage doubler circuit inside the pedal which generates the 24V anode or plate voltage for the valve.
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