Añadido: Apr 16, 2008
De: h8rr
Duración: 0:16
"Flash" energize characteristic inherent to *many* 9pin miniature Amperex and Mullard BVA tubes made in Gt. Britain and Holland during the 50s and 60s. Integrated amp: Class A tube-rectified EL84 output [push-pull config] Fisher x-100; 1962. Tube compliment: Power Output: Amperex D-Getter EL84 quad; 1959. Rectifier: Mullard by Amperex dual D-Getter metal base GZ34; 1957. Phono Stage [1st position]: Mullard box plate CV4004, dual support halo getter; 1967. Tone Amp [2nd position]: Telefunken smooth plate; 1964 Phase Inverter/Voltage Amp [3rd position] Amperex short-plate "Bugle Boy" w/large halo getter; 1961. This has been the configuration for the past 6 months; after rolling tubes in this amp every few weeks throughout the entire first year of ownership. Long live the way playback was meant to sound, and be heard. Hearing is believing, seen.
Categoría: Tech
Tags: 12ax7 amperex audiophile bva class ecc83 electronics flash hifi mullard tube vacuum valve vintage
Rating: ( ratings) Visto: 323 Comentarios: 3
h8rr Says:
Apr 24, 2008 - Excellent suggestion. The amp in question does happen to have a thermistor, which typically defeats all but a faint trace of the flash. The amp was running for several hours before shutting down immediately prior to recording this video, just long enough for the tubes to all go dark. Only then, on the restart is the flash as noticeable, as seen.
crooner2007 Says:
Apr 24, 2008 - That explains the flash. The thermistor was still warm and fully conducting when you re-applied power. Enjoy your tube gear!
douro20 Says:
Jun 26, 2008 - I have an old Philco AA5 radio which does this.
crooner2007 Says:
Apr 23, 2008 - Nice, I suggest a Thermometrics CL series thermistor/inrush limiter in series with the power transformer primary, before going to the power switch. This will eliminate the flashing and thus extend the tubes.