(!!!) (Good Value Single) ECC81=12AT7 Mullard old logo made in Hyperlec Brive France used/good (8.4/9.8ma) Title: ECC81=12AT7 Mullard like new old logo made in Hyperlec Brive France

1 low noise tube) ECC81=12AT7 Mullard old logo made in Hyperlec Brive France used/good in white boxes 1970”s (good in guitar amps and a “”best value”” 12AT7)

8.4ma Gm=4600

9.8ma Gm=5300

tested on Amplitrex

Good Ma range 8-10ma

Good Gm range 4500-5500

Mullard clone made in France

Hyperlec (later known as T.R.T and R.T.C.) was an electronics factory in Brive (a.k.a. Brive la Gaillarde), which is a town in the Corrèze region of France.