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Valve amplifier's can be purchased at most local music equipment stores. The average price for a valve amplifier is around $800.00 USD. Smaller valve amplifier's can be purchased for around $300.00 USD.

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Valve amplifier's can be purchased at most local music equipment stores. The average price for a valve amplifier is around $800.00 USD. Smaller valve amplifier's can be purchased for around $300.00 USD.

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On average the Epiphone Valve Junior amplifier retailed between $50 - 200 USD for the amp head. The cost of the combo amplifier which includes the speaker cabinet is approximately $200-300 USD. The Epiphone Valve Jr is a modern classic which delivers an impressive rock and roll sound.

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A2. For amplification to take place, one needs three terminals; an input, an output, and a control signal.

This indicates the original " valve" naming; after a mechanical valve, where a small effort on a (hydraulic) valve may be used to control a larger effort of the controlled fluid.

A1. If u meant why diode can't be used as an amplifier diode is used as a rectifier..

it converts ac current to dc and there is an inbuilt voltage drop... so it can't be used as an amplifier

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There are two names for the tube used in Class A amplifiers developed in the USA. This valve in the US is called vacuum tube audio amplifier. In the UK they are known as valve audio amplifiers.

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Darlington amplifier has more gain when compared to cascade amplifier .

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