DHA Hand built guitar, bass and keyboard amplifiers

                                   and effects from Devon in the UK

 

 Dave Hall Amplifiers                                 www.davehallamps.co.uk

 VT1-MK3

VT1-MK3

 

The VT1-MK3 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 VT1-MK3 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 and the cool blue back-light seen via the valve vents indicates the power is on.

 

The controls are very simple, i/p pad, Level, Gain, Boost, Clip, Colour level, Colour select switch and Boost by-pass. 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 amplifier.

 

Gain sets the level into the second stage of the valve and hence the level of gain. Use your volume control or on your guitar and/or the i/p pad to control the gain on the first stage of the valve, you will find that the VT1-MK3 responses very well to this and you can control the break-up distortion like this.

The 3 position 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 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 will drop.

The 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.

 

The 3 position Colour select switch is used to select Colour 1, 2 or non which is the centre position. When Colour 1 or is selected negative feedback is introduced into the circuit the level of which is adjusted with the Colour pot. The Colour effect is best heard at high gain which is an increase in distortion and compression.

 

So, just plug your guitar into the jack with the guitar drawing and your amplifier into the jack with the amp drawing and you are off and running! The pedal is covered for any parts and labour required to repair it should it go wrong within 12mths of purchase. This does not cover misuse of the product but we will be happy to repair this at cost as we will for any units which fail outside of the 12mths.

The VT1-MK3 is fitted with 2.1mm external PSU adaptor for use with a 12v @ 1200mA external supply. The inner of the connector is the positive, there is reverse polarity protection so no harm will be done if you get it wrong.

  Dave Hall Amps, © 2011  

 

UK buyers

includes UK power supply

European buyers

Includes international power supply

 

USA/Canada buyers

Includes international power supply

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VT1-MK3 PSU UK

£149.00

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Buy VT1-MK3 PSU UK

VT1-MK3+PSU European P&P

£149.00

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VT1-MK3+PSU USA/Canada P&P

£149.00

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