Vett- Look at this data sheet for the old Sylvania 6SN7GTA (http://home.comcast.net/~tubes/Syl55/Get_Page.html?175). It's plate voltage is also 450V. The tube you mention is a 6SN7GTA/B- same designation with a "b" added. That's what the different suffixes refer to on tubes: Slight variations in the basic design. The plate voltages on NOS 6sn7 tubes can vary from 275V to 450V, depending on the design, and the typical contemporary 6SN7 circuit delivers 250V. MS N's unit doesn't take 6SN7s though, and miniature nine-pins don't vary much at all in plate voltage specs(new or old)within the same family. Here's a site that lists the various plate voltages of the most popular NOS tubes within the 6SN7 family (just FYI): (http://home.att.net/~chimeraone/6sn7sound.html)
Damsel in Distress with Jadis DPL
Caught the tube rolling bug and acquired a pair of 12AU7 "supposedly" NOS Phillip Mullard collaboration tube along with a RCA 12AX7 for my Jadis DPL preamp. Experienced a loud crack from left channel through my loud speaker. Left speaker went completely dead. Removed all 3 tubes and re-installed original compliment. Everything is back to normal. Or so it seems. What happened? Did I do any damage? Any comments welcome ~ Deb
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- 10 posts total
- 10 posts total