Made in G.Britain by Mullard.
Mullard designate the EF37A as a high gain, high impenance, pentode for use in AF pre-amplifier stages. The electrode system is of anti-microphonic construction, and the specially designed heater reduces hum to negligible proportions.
Nos inoriginal box. Matched pair are available
Made in W.Germany by Telefunken.
Silver plate. Diamond Logo on the bottom,
Similar and very much like EF806 and EF86, but different pin-out..!
See data
Nos in original box. Matched pair are available.
Made in W.Germany.
Mesh plate version with O-Getter.
Used tested good.
Made in G.Britain by Mullard.
Silver plate version with O-Getter.
Used tested very good as new tubes.
Matched pair and quad are available
Made in G.Britain by Mullard
Mesh plate version with O-Getter and double supports
Nos in box.
Matched pair are available.
Made in G.Britain.
Yellow print, mesh plate version with O-Getter.
Used in box and tested very good.
Matched pair are available