Home » Power Tubes » (!) (Good Value Pair) 6S4A RCA USA black plate NOS 1960's - 1970's (19ma and 18.8ma)

(!) (Good Value Pair) 6S4A RCA USA black plate NOS 1960's - 1970's (19ma and 18.8ma)

Name: (!) (Good Value Pair) 6S4A RCA USA black plate NOS 1960's - 1970's (19ma and 18.8ma)
Brand: Tube World
SKU: 6S4A
Price: 12.99 USD
Availability: InStock

$ 12.99

1 pair) 6S4A RCA black plate NOS

1 tube) 19ma Gm=3900 ("O" getter 1970's

1 tube) 18.8ma Gm=3800 ("U" getter 1960's) on left

Good mA = 20+

Good Gm = 4000+

(the 6S4A features high plate current at relatively low plate voltages and is capable
of withstanding high pulse voltages)(Vfil=6.3V @ 600ma)
MAX Ratings: Vplate=550V, Iplate=30ma, Pout=8.5 watts
Typical Operation: Vplate=250V, Vgrid=-8V, Iplate=24ma, Mu=16.5, Gm=4500, Rplate=3700 ohms)