| 1. | Over the next two years they developed their first valve amplifier.
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| 2. | Valve amplifier circuits are significantly different from broadband solid state circuits.
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| 3. | A particularly critical component is the output transformer of a valve amplifier.
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| 4. | Amateurs also use valve amplifiers in the 500-1500 watt range mainly for economic reasons.
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| 5. | Vacuum tube or electronic valve amplifiers were first used to resolve microphone impedance and output problems.
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| 6. | The DeVille features a 60-watt valve amplifier with three 12AX7 preamp valves and two 6L6 output valves.
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| 7. | Vacuum-tube amplifiers ( also known as tube amplifiers or valve amplifiers ) use a vacuum tube as the active device.
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| 8. | Amplifiers for harder, heavier genres often use valve amplifiers ( known as " tube amplifiers " in North America ) also.
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| 9. | Valve amplifiers have a tuned network that serves as both the low pass harmonic filter and impedance matching to the output load.
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| 10. | A pair of Kershaw Kalee II arc film projectors with RCA sound heads and an RCA high fidelity 6-valve amplifier were installed.
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