(!!!) (Best Single 1961) 6BQ7A RCA black plates NOS “”D”” getter 1961 (8.2/8.4ma) 1-3% section balance (Douk Audio, Modwright, Schiit)

1 low noise tube) 6BQ7A RCA black plates NOS “”D”” getter NOS 1961 (MC)

8.2ma Gm=6000

8.4ma Gm=6200

Tested on Amplitrex

Good Ma = 8-9ma

Good Gm = 6000-6400

(also see 6BZ7 and 6BK7B)

– Douk Audio F5
– Modwright Transporter
– Schiit Lyr amp 2011
– Don Allen
– Donald North Audio (DNA) Stratus