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DHA ValveTone VT2 Dual Stage Bass
Submitted on October 24, 2005.
DHA ValveTone VT2 Dual Stage 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 lot of gain generated by the valves and selectable op-amp generated boost and this will overdrive the input of your guitar amplifier with ease.
- Gain 1
- sets the level into the second stage of the valve on channel 1 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 Dual Stage responses very well to this and you can control the break-up distortion like this.
- Gain 2
- sets the level into the second stage of the valve on channel 2 and hence the level of gain on that channel. When channel 1+2 (high gain) is selected the overall gain depends on both Gain pots as Gain 1 and therefore channel 1 is always selected.
- Clip (3 position switch)
- is a neat trick you won’t have seen before on this type of effect. In the center position (None) there is no clipping selected and the only clipping heard at higher gains is the valves soft chipping. The Si position connects two Silicon diodes 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 will drop.
- Boost Level
- control sets the level of the clean Op-amp Boost volume when the Boost switch is selected.
Various
- the manual about the ValveTone Dual Stage Bass:
The ValveTone Dual Stage uses two 12AX7 (ECC83) valves to generate classic pure valve tones. There are two selectable channels with a separate Gain on each, channel 1 produces low to mid gains while the foot switch selected channel 2 adds two extra valve stages to produce high gain levels. There is a true By-Pass switch plus an LED indicator for both effect on and when 1+2 is selected. The ValveTone Dual Stage is capable of producing a very wide range of gains to suit all types of playing. It is intended to be used in front of a valve amplifier, but will also work well with solid state amps or even recording set ups acting as a valve pre-amp.
The ValveTone Dual Stage has a built-in voltage doubler circuit; this generates 24V from the existing 12V power supply. The 24V is used to supply the anodes or plates of the valves, this adds more clean headroom, gain and output volume to the pedal over the standard ValveTone Dual MK2 range.
The ValveTone Dual Hi-Plate is fitted with 2.1mm external PSU adaptor for use with a 12v @ 500mA external supply but a supply of 1.2A or greater is recommended. The user should use a well regulated external supply as the better the regulation then the less the hum when at higher gain levels. If you find there is a lot of hum at high gains then the problem will be the supply is not well regulated. I have found that Switchmode supplies work well and these are standard for higher current types, so it is likely that any 12V supply over 1.25A will be a switchmode. The inner of the connector is the positive, there is reverse polarity protection so no harm will be done if you get it wrong.
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