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Audio and Video Talk
Valves / Vacuum Tubes
6L6 valves - some interesting test results
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<blockquote data-quote="charles" data-source="post: 416011" data-attributes="member: 2759"><p>Dear Capetowntracks,</p><p></p><p>According to an original Quad II manual one can use 6L6G and 5881 (6L6WGB) valves as a substitute for KT66 valves.</p><p></p><p>According to the GE spec sheet of the 7581/A it is a direct replacement of the 6L6GC. Nowadays some use the 6L6GC in Quad II's because of the unobtainable/high price of original KT66 valves.</p><p></p><p>The 7581A's heater current is 0.9 Amp whereas the KT66's heater current is 1.27 Amp. So regarding this aspect it is safe to use it in place of the KT66 valve.</p><p></p><p>I have only used KT66, 6L6G and 5881 valves in my Quads.</p><p></p><p>Kind Regards</p><p></p><p>Charles</p><p> </p></blockquote><p></p>
[QUOTE="charles, post: 416011, member: 2759"] Dear Capetowntracks, According to an original Quad II manual one can use 6L6G and 5881 (6L6WGB) valves as a substitute for KT66 valves. According to the GE spec sheet of the 7581/A it is a direct replacement of the 6L6GC. Nowadays some use the 6L6GC in Quad II's because of the unobtainable/high price of original KT66 valves. The 7581A's heater current is 0.9 Amp whereas the KT66's heater current is 1.27 Amp. So regarding this aspect it is safe to use it in place of the KT66 valve. I have only used KT66, 6L6G and 5881 valves in my Quads. Kind Regards Charles [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
6L6 valves - some interesting test results
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