Members alaskaehlers Posted November 27, 2007 Members Share Posted November 27, 2007 So I just installed a new set of TAD 6L6GCSTR's in my Blackmore. Used my new Weber BR-4 bias rite probe, and set the m.a. @ 40, with the plate voltage around 470-475, just a little bit on the hot side. Playing the amp today I noticed the tubes were glowing blue, with the two left tubes more blue than the others. When playing the amp though it sound amazing. What you guys think, biased to warm/hot? Link to comment Share on other sites More sharing options...
Members knucklefux Posted November 27, 2007 Members Share Posted November 27, 2007 nah, it's fine. it's just energized gas or something inside the tube, sorta like neon IIRC. sometimes it happens, sometimes it doesn't. if the cathode was glowing red, THEN you'd have a problem. Link to comment Share on other sites More sharing options...
Members tommythelurker Posted November 27, 2007 Members Share Posted November 27, 2007 A little blue glow is normal. Link to comment Share on other sites More sharing options...
Members tommythelurker Posted November 27, 2007 Members Share Posted November 27, 2007 if the cathode was glowing red, THEN you'd have a problem. You mean the plate, not the cathode. Link to comment Share on other sites More sharing options...
Members Steveanders86 Posted November 27, 2007 Members Share Posted November 27, 2007 what does IIRC mean?! haha Link to comment Share on other sites More sharing options...
Members Weathered Posted November 27, 2007 Members Share Posted November 27, 2007 I noticed that with the TAD 6L6's that I put in my bandmate's Fender Bandmaster as well. It may be a TAD thing. Link to comment Share on other sites More sharing options...
Members tommythelurker Posted November 27, 2007 Members Share Posted November 27, 2007 what does IIRC mean?! haha Not sure if the haha means there's a joke there I'm missing, but in case you're serious (or anyone else is wondering): IIRC = If I Recall Correctly Link to comment Share on other sites More sharing options...
Members bdubbs Posted November 27, 2007 Members Share Posted November 27, 2007 I've heard that it means they are at the end of their life but that is not fact just what i remember hearing. When mine were going out the door they were glowing also along with crackling. Link to comment Share on other sites More sharing options...
Members knucklefux Posted November 27, 2007 Members Share Posted November 27, 2007 You mean the plate, not the cathode. yeah, goddamn cathode and anodes always had me confused. you know how hard it is to calculate how much voltage a wet cell battery will make when you can't remember which friggin one is positive? Link to comment Share on other sites More sharing options...
Members alaskaehlers Posted November 27, 2007 Author Members Share Posted November 27, 2007 last night I installed new tubes in my Blackmore, 100CL, both 5150's, as well as the 65' Bandmaster. The Blackmore is the only one glowing blue, but it's also the only one with TAD's, that must be it. Thanks guys Link to comment Share on other sites More sharing options...
Members stigmataguitar Posted November 27, 2007 Members Share Posted November 27, 2007 I just put in a new quad set of JJ KT77's in my Marshall DSL100 and one of the new tubes has a little bit of a dark blue glow to it. I emailed the vendor I purchased them from with pictures and their reply was: "The glow looks more like a deep blue to me. A blue glow is fine and some tubes will do it while others won Link to comment Share on other sites More sharing options...
Members FastRedPonyCar Posted November 27, 2007 Members Share Posted November 27, 2007 Yup my ruby EL34 BSTR's have a blue hazey glow about them also. If the big dark plate structure that runs the lenght of the tube ever starts glowing red, that's when you're in trouble. Link to comment Share on other sites More sharing options...
Members tommythelurker Posted November 27, 2007 Members Share Posted November 27, 2007 yeah, goddamn cathode and anodes always had me confused. you know how hard it is to calculate how much voltage a wet cell battery will make when you can't remember which friggin one is positive? Confused me for a long time too. Probably sounds dorky but the way I remember it is that anode starts with 'a' which is at the start of the alphabet, and the anode is where the current flow (direction of positive charge, not electron flow) starts from. So current flows in alphabetical order from Anode to Cathode. Link to comment Share on other sites More sharing options...
Members Weathered Posted November 27, 2007 Members Share Posted November 27, 2007 Confused me for a long time too. Probably sounds dorky but the way I remember it is that anode starts with 'a' which is at the start of the alphabet, and the anode is where the current flow ( direction of positive charge, not electron flow) starts from. So current flows in alphabetical order from Anode to Cathode. I had to read this a couple of times, because I missed the part about positive voltage flow, and I was going to be like "Electrons boil off of the cathode, dood." Link to comment Share on other sites More sharing options...
Members tommythelurker Posted November 27, 2007 Members Share Posted November 27, 2007 I had to read this a couple of times, because I missed the part about positive voltage flow, and I was going to be like "Electrons boil off of the cathode, dood." I know, damn Benjamin Franklin Link to comment Share on other sites More sharing options...
Members knucklefux Posted November 27, 2007 Members Share Posted November 27, 2007 actually, i was having some issues figuring out how in the {censored} the PI in my SLO clones works. then, i was reminded of electron flow, and it made WAY more sense. conventional flow FTL! Link to comment Share on other sites More sharing options...
Members tommythelurker Posted November 27, 2007 Members Share Posted November 27, 2007 actually, i was having some issues figuring out how in the {censored} the PI in my SLO clones works. then, i was reminded of electron flow, and it made WAY more sense. conventional flow FTL! From a circuit analysis standpoint it shouldn't make a difference, pick one convention and stay consistent (make sure you pick positive charge flow because that's the accepted standard these days ). Unless I'm totally missing what you're talking about Link to comment Share on other sites More sharing options...
Members Steveanders86 Posted November 27, 2007 Members Share Posted November 27, 2007 Not sure if the haha means there's a joke there I'm missing, but in case you're serious (or anyone else is wondering):IIRC = If I Recall Correctly nope, the laughing was because i kind of felt like an idiot asking. but i honestly didnt know. i see it ever now and then and it confused the carp out of me. thanks for the clarification. Link to comment Share on other sites More sharing options...
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