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Plasma R

Dual Mono Vacuum Tube Line Stage

NAT standard model Plasma Dual Mono Line Stage moves to R-remote extension after seven years of producing. There are two high current 6N6P/6N30P-DR tubes per channel build zero feedback line stage. This concept results in lower output impedance, to control all types of interconnect cables( for driving of power amplifier ).

Ten(10) tubes works in perfect simmetry means five(5) per each channel.

Power supply combine vacuum tube rectification and double regulated stabilization realized with stabilotron tubes (plasma effect) and the last generation of solid state. Plasma power supply has very low and constant output impedance through a very wide frequency response.

Sound quality is totally independent against power supply instability, because all stages in preamplifier contain stabilisation.

Plasma Dual Mono Line Stage has superior sound characteristics.


Technical Specification
Name Value
Frequency Response 0.25 Hz to 300 kHz - 3dB; 20 Hz to 20 kHz ± 0.04dB
Noise < -104 dB "A" weighted @ 1V rms
Gain 10 dB(x3.2);   Phase status: invert(180 degree)
THD & N < 0.03 % 20 Hz to 20 kHz @ 1V rms
Input Impedance > 20 kohms
Stereo Separation > 100 dB @ 1 kHz
Tube Complement 4 x 6N30P-DR(6N6P); 2 x OD 3; 2 x EZ80 & 2 x 6N2P-EV
Output Impedance < 300 ohms @ 1 kHz
Power Requirements 110 VAC or 220 VAC @ 50 to 60 Hz, max. 100 VA
Dimensions 19" (483 mm) wide x 18" (455 mm) deep x 5.7" (145 mm) high
NET Weight approx. 31 lbs. (14 kg) unpacked
TOTAL Weight approx. 53 lbs. (24 kg) packed


Design Features

- full dual mono construction with 10 tubes(5 for each channel)
- zero feedback design
- all triode pure class A configuration
- double regulated, hybrid output high precision power supply
- high current super tube 6N6P/6N30P-DR double triode (military grade), long life over 10 000 hours
- plasma effect are used for stabilization in power supply realized with OD 3 tube (new old stock)
- vacuum tube power supply rectification with EZ80 tube
- all polypropylene capacitors in power supply
- two low density silent transformers custom made for NAT
- soft start operate
- infrared remote control made from solid block of aluminum
- hard wired in power supply
- gold plated teflon insulated RCA jacks
- hand assembled all aluminum modulated chassis
- extensively used computer numeric control machines (CNC)

Design features are subject of change without notice

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