Moderators Kindness Posted March 16, 2009 Moderators Share Posted March 16, 2009 Like I said earlier, been doing this for forty years and have never had a tube go out without it giving a lot of warning. I haven't been alive that long, but the only times I've seen it happen without warning is within the first few hours of use or after being physically abused. Link to comment Share on other sites More sharing options...
Members J the D Posted March 16, 2009 Members Share Posted March 16, 2009 I haven't been alive that long, but the only times I've seen it happen without warning is within the first few hours of use or after being physically abused. True. But if they don't give up the ghost when they are first used they will last their entire design life if they are not physically abused. Link to comment Share on other sites More sharing options...
Members Guttermouth Posted March 16, 2009 Members Share Posted March 16, 2009 Like I said earlier, been doing this for forty years and have never had a tube go out without it giving a lot of warning.bought any jj's lately?:poke: Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted March 16, 2009 Author Members Share Posted March 16, 2009 I've had the most trouble recently with the GT Mullard reissues.....the GT12AX7Ms.... This is the amp: Link to comment Share on other sites More sharing options...
Moderators ThudMaker Posted March 16, 2009 Moderators Share Posted March 16, 2009 This is the amp: Oh, that color! :love: Link to comment Share on other sites More sharing options...
Members fretless Posted March 16, 2009 Members Share Posted March 16, 2009 I've had the most trouble recently with the GT Mullard reissues.....the GT12AX7Ms.... This is the amp: Beauty , I've heard the same about those GT tubes , I have the New Sensor Mullard ri's in mine and they are killer , so far so good.http://www.newsensor.com/ProductListing.aspx?CatId=44 Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted March 16, 2009 Author Members Share Posted March 16, 2009 The GT12AX7Ms sound good...but must be prone to damage and shock..... Link to comment Share on other sites More sharing options...
Members zbasstringer Posted March 16, 2009 Members Share Posted March 16, 2009 What's the Mesa's output? About 225 watts or so? The difference in output between a 100 watt head and one like the Mesa isn't all that much. At that point it's all about features and tone.http://www.mesaboogie.com/Product_Info/Out_of%20_Production/Bass_400_/bass_400_.html500 watts at 2 ohms Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 16, 2009 Moderators Share Posted March 16, 2009 500 watts at 2 ohms Hahaha. No it isn't. It's one of the many reasons to give Mesa the . The real output is actually right around 275-300 watts. Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted March 16, 2009 Author Members Share Posted March 16, 2009 12 6L6s? that's ridiculous.....$210+ just to re-tube! Link to comment Share on other sites More sharing options...
Members 82Daion Posted March 16, 2009 Members Share Posted March 16, 2009 12 6L6s? that's ridiculous.....$210+ just to re-tube! Sure, but they last for quite some time, and it's just regular maintenance, right? Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted March 16, 2009 Author Members Share Posted March 16, 2009 :arg: Link to comment Share on other sites More sharing options...
Members zbasstringer Posted March 16, 2009 Members Share Posted March 16, 2009 Hahaha. No it isn't. It's one of the many reasons to give Mesa the . The real output is actually right around 275-300 watts. Out of curiosity, how do you go about finding the real output? Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 16, 2009 Moderators Share Posted March 16, 2009 Out of curiosity, how do you go about finding the real output? You feed the amp an input signal from a sine wave generator while watching the output on an oscilloscope. Then you measure the output voltage when signal starts to clip on the oscilloscope. You can get more precise by using a harmonic frequency analysis of the output signal, but the oscilloscope is accurate. Link to comment Share on other sites More sharing options...
Members gonzobassman Posted March 16, 2009 Members Share Posted March 16, 2009 I actually did have a tube malfunction at a gig. Everything was fine,and then I just went silent. I looked in the top of my Marshall,and could see that the first power tube wasn't glowing. I always kept a spare power tube with me. Opened the amp up,switched tubes,had signal,finished the set.On break I inspected the tube,and there was a pinhead sized hole in the side of it.I rationalized that it had to be a tube malfunction,finished the gig,and never had another problem of any kind with that amp.Did a complete tube replacement with that gig money,and ate one pot pie a day for a week!!! Lol. Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted March 16, 2009 Author Members Share Posted March 16, 2009 Link to comment Share on other sites More sharing options...
Members misterhinkydink Posted March 16, 2009 Members Share Posted March 16, 2009 I actually did have a tube malfunction at a gig. Everything was fine,and then I just went silent. I looked in the top of my Marshall,and could see that the first power tube wasn't glowing. I always kept a spare power tube with me. Opened the amp up,switched tubes,had signal,finished the set.On break I inspected the tube,and there was a pinhead sized hole in the side of it.I rationalized that it had to be a tube malfunction,finished the gig,and never had another problem of any kind with that amp.Did a complete tube replacement with that gig money,and ate one pot pie a day for a week!!! Lol.A single power tube failure won't cause your amp to go silent. Link to comment Share on other sites More sharing options...
Members bnyswonger Posted March 17, 2009 Members Share Posted March 17, 2009 In using tube amps for most of my career (there were a few SS years in the late 70's / early 80's) I've had exactly one catastrophic tube failure on a gig. I had a power tube arc in my marshall back in '87. That was it. Considering 20+ years and over 1000 gigs since then, not too bad. If I'm going out on tour, I'll bring a spare set of power tubes but certainly not for playing around here. Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted March 17, 2009 Author Members Share Posted March 17, 2009 Marshall? What amp are you playing? Any advice? Link to comment Share on other sites More sharing options...
Members bnyswonger Posted March 17, 2009 Members Share Posted March 17, 2009 Marshall? What amp are you playing? Any advice?I use a 100W superlead > 2 12"s for a "presence" amp on certain rock gigs...in conjunction with an SVT > into 2 15's for bottom. That's 10 6550s - headroom is not an issue. I think as a matter of practicality asking a 50W marshall to provide ample fat bottom for a rock band is pushing it - maybe with a lot of very efficient speaker area it could work. Four EL34s or 6L6s is more reasonable, but again you need the right cab(s).I use an ampeg V4B through a single 15" for a lot of the gigs I do anymore. Link to comment Share on other sites More sharing options...
Members fretless Posted March 17, 2009 Members Share Posted March 17, 2009 [YOUTUBE]WnZRJjmOZb8&feature=channel_page[/YOUTUBE] Link to comment Share on other sites More sharing options...
Members Klatu Posted March 17, 2009 Members Share Posted March 17, 2009 Played a Fender P through a 100 guitar amp for a while. Sound was okay, but there is one thing about Marshall tube amp you must know: If you play a Marshall, you need to own 3. 1 to play on stage. 1 back stage as a backup for when the one you are playing blows up. 1 in the shop getting repaired so you can swap it out for the one that will blow up next. Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 17, 2009 Moderators Share Posted March 17, 2009 Sounds like you were hoodwinked by one or more bad techs. There is nothing inherently unstable or fragile about Marshall amps. Quite the opposite in fact. Link to comment Share on other sites More sharing options...
Members Guttermouth Posted March 17, 2009 Members Share Posted March 17, 2009 Sounds like you were hoodwinked by one or more bad techs. There is nothing inherently unstable or fragile about Marshall amps. Quite the opposite in fact.shhhh...... everyone knows those old marshalls with the tubes in them are the worst amps ever built.everyone should just box theirs' up and send em to me for "disposal" .... Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 17, 2009 Moderators Share Posted March 17, 2009 shhhh...... everyone knows those old marshalls with the tubes in them are the worst amps ever built.everyone should just box theirs' up and send em to me for "disposal" .... Right. That's what I meant. Did you know that in the 1960s and 1970s Ampeg made amps that will in fact become radioactive in the year 2010. True story. Anyone reading this that has access to one of these dangerous amps, please PM me for information about the official containment location. I will provide you with a prepaid shipping label to make the shipment as easy as possible. Link to comment Share on other sites More sharing options...
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