K66

12AU7, ECC82

Amperex

Branded Hewlett Packard

ECC82, 12AU7

Fivre

Branded Geloso

12AU7

Hitachi

Branded Hit-Ray

12AU7

Hitachi

Branded B&K

12AU7, ECC82

Matsushita

Branded Teerad

12AU7, ECC82

Matsushita

Branded National

12AU7, K61

Mullard

Branded Tungsram

12AU7, CV4003

Mullard

ECC82, 12AU7, K61

Mullard

Branded Heath

12AU7

NEC

Branded Channel Master

12AU7, ECC82

Philips

Branded Pope

12AU7

RFT

Branded Trigon

12AU7, ECC82

Siemens

Branded ATES

12AU7, K61

Siemens

Branded Telefunken

12AU7, GF1

Siemens

Branded Artisan

ECC82, 12AU7

Siemens

Branded Sonotone

ECC82, 12AU7

Siemens

Branded Harman Kardon

ECC82, 12AU7

Siemens

Branded Sonotone

ECC82, 12AU7, K61

Branded Mullard

12AU7

Branded Lansdale

ECC82, 12AU7

Branded Pinnacle

12AU7

Branded Mazda

12AU7

Branded Tungsram

12AU7

Branded Awv