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DHA ValveTone VT1 Mk3 Hi-Plate
Submitted on October 24, 2005.
DHA ValveTone VT1 Mk3 Hi-Plate 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 responses very well to this and you can control the break-up distortion like this.
- Clip (switch)
- is a 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 the 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.
- Boost (switch)
- allows you to add extra clean output volume by switching in an op-amp. The amount of volume is controlled by the Boost level control. This is a useful feature when a low level of gain is required for a clean type setting but a higher than by-pass output is still needed. The Boost switch is true by-pass so when it’s off the signal path is pure valve.
Various
- the manual about the ValveTone 1 Hi-Plate:
The ValveTone 1 Hi-Plate 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 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 and the LED indicates if the effect is on or off.
The ValveTone 1 Hi-Plate 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 an internal switch mode power supply which doubles the 12V to 24V for the valve anodes or ‘plates’, hence the name Hi-Plate. This feature provides improved clean headroom and a greater output over the MK2 version.
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