1000W Audio Tube Amplifier Philips EL6471 on music
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looks like tt21's in the back. this is a kilowatt??
my dad built a kilowatt valve amp once. i've got 40 + 40 check my video out. yours looks the nuts though.
toth1971 2 years ago
The outputstage operates two QB3,5/750, together they make 1500Watts of dc-power and one kilowatt for the speakers. Seen your amp- nice and quality! More to this amplifire,use link to my homepage in the description above!
histelek 2 years ago
must the mercury rectifiers not preheated, bevore you switch on the anode voltage? The Philips EL6420 has a preheat switch to conserve the two AX50.
RBSGutgefahren 2 years ago
the Hg-vapour rectifiers do preheat, there is a special delay tube, 4152-01, that works on a relay, that switches the three-phase anode voltage transformer on, that lasts about a minute; you have it in real time on the video
histelek 2 years ago
Is it normal that the anode glows of the QB 3,5/750´s?
RBSGutgefahren 2 years ago
Yes, these high-power tubes are not compareable with the EL34, KT88 etc.
histelek 2 years ago