Editing Nuvistor (section)

==Types==
[[File:6C52H.jpg|thumb|Nuvistor triode 6С52Н. Full (right), without case (left), with flying leads. USSR, 1970s.]]
* 7586 - First one released, medium mu triode (amplification factor: 31 to 35)
** 7895 - 7586 with higher mu (amplification factor: 64)
** 8393 - medium mu triode, equivalent of 7586 except heater is 13.5 volts at 60 mA, used in [[Tektronix]] equipment.
* 7587 - Sharp cutoff tetrode (Anode is top located)
* 8056 - triode for low plate voltages
* 8058 - triode, with plate cap & grid on shell, for UHF performance
* 6CW4 - high mu triode, with a 6.3 volt / 135 milliampere heater.  Most common Nuvistor type in consumer electronics.  Also used in [[Very high frequency|VHF]] [[amateur radio]] and [[Marine VHF radio|marine radio]] equipment.  (amplification factor: 65)
** 2CW4 - Same as type 6CW4, but with a 2.1 volt / 450 milliampere heater.  Most commonly used in television receivers with series heater strings
** 13CW4 - same as 6CW4, but with 12.6 Volt / 230 milliampere heater.  Often used in VHF radio equipment powered by 12 volt [[rechargeable battery|storage batteries]] and generators.
* 6DS4 - remote cutoff 6CW4, with a 6.3 volt / 135 milliampere heater.  Most commonly used in RCA color television receivers as an [[Valve RF amplifier|RF amplifier]] in tuners with transistor [[frequency mixer|mixers]] and [[local oscillator]]s (amplification factor: 63)
** 2DS4 - same as 6DS4, but with a 2.1 volt / 450 milliampere heater.  Most commonly used in television receivers with series heater strings
* 6DV4 - medium mu, intended as UHF oscillator, shell sometimes gold plated (amplification factor: 35)
*Soviet types (some types may have long solder-in leads)
**6П37Н-В (Latin alphabet: 6P37N-V) - wire-ended power tetrode<ref name=museum/>
**6C51H (6S51N) - Similar to 7586
**6C52H (6S52N) - Same as 7895
**6C53H-В (6S53N-V) - wire-ended triode<ref name=museum/>
**6C62H (6S62N) - High-mu (90) triode intended to receive weak RF signals
**6C63H (6S63N) - triode