EF85 / 6BY7 SILVER PLATE
Fine miniature glass pentode tubes manufactured in Germany by renowned Telefunken. These 9 pin RF pentode tubes, posess variable transconductance, and may be used for wide band amplification. They come with silver mesh plates, top halo getters, and are printed in white with Telefunken logo MADE IN GERMANY EF85. Boxes are standard blue and red Telefunken printed EF85.