(!!) (Best RCA single) 5965 RCA IBM black plates triple mica “”D”” getter like new 1958 (12.0/12.2ma)

1 low noise tube) 5965 RCA IBM black plates triple mica “”D”” getter like new 1958

12.0ma Gm=7800

12.2ma Gm=7600

Tested on Amplitrex

NOS mA = 12mA

NOS Gm = 8000-8500

– Berning ZH270
– Exemplar linestage
– Loth-X 300B
– modded Denon 2900 CD player
– mu follower of CJ PV8
– Conrad Johnson PV-5, PV-8 preamp