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細節
A de Forest Spherical Audion Valve
with parallel filaments (retired), double-wing plates and cloth covered top leads from pitch-filled globe exit, candelabra base fitting and white Bryant porcelain holder, circa 1913 -4in. (10.2cm) high including base
with parallel filaments (retired), double-wing plates and cloth covered top leads from pitch-filled globe exit, candelabra base fitting and white Bryant porcelain holder, circa 1913 -4in. (10.2cm) high including base
出版
70 Years of Radio Tubes and Valves, J. W. Stokes, Chp II, pp.6-9
Radio! Radio!, J. Hill, 3rd Edition, pp.19-20
Radio! Radio!, J. Hill, 3rd Edition, pp.19-20
注意事項
No VAT will be charged on the hammer price, but VAT at 15% will be added to the buyer's premium which is invoiced on a VAT inclusive basis.