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Post by stratkiller51 on Sept 15, 2009 10:04:30 GMT -5
well my qr has been excellent for the past few months and i really have enjoyed playing it, tonite i have a gig with some new guys and i resrtung my guitars put all new patch cables on the board and after checking everything out it sounds somewhat muddier than usual, i'm having to crank the treble to the max! it has that familiar sound of checking the bias again, it was just checked a couple months ago but in afraid it might need it, i don't mind doing it with my weber bias rite but i just hate pulling the tray and removing tubes in and out!! i wish these things had external biasing but im kinda concerned the bias is slipping again!! tubes are all good cab is new splawn sb's, all cables are monster, anyone having to that much matinence?
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Post by splatter on Sept 15, 2009 11:45:56 GMT -5
have you checked the bias yet to see if tht is actually the problem ?Also which tubes are you using and what % do you have them biased at ?Maybe its the tubes going and not the bias drifting . Are these tubes the same brand as what you used before ?
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Post by stratkiller51 on Sept 15, 2009 12:09:22 GMT -5
same tubes 31ma, its all info is on a piece of tape under the tray, i'll pull it in a few hrs and get back to you, tbe depot i think i got these, they were all with in 3 ma
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Post by Ayton(e) on Sept 15, 2009 13:12:40 GMT -5
Surely if you change all your patch cables then immediately have a worse sound, that might have something to do with it?
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Post by splatter on Sept 15, 2009 14:13:08 GMT -5
Surely if you change all your patch cables then immediately have a worse sound, that might have something to do with it? +1
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Post by H. on Sept 15, 2009 14:51:59 GMT -5
Are those Monster cables new also? I added a couple new Monster cables awhile back and it seriously changed my tone for the worse.
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Post by SmokinPaul on Sept 15, 2009 15:10:58 GMT -5
Ayton is probably right. To have that kind of problem after changing some cables is not coincidence. And yeah, i've found that some Monster cable can really color your sound, sometimes for the worse. What kind of cable did you use for replacements, and what kind of cables were replaced?
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Post by jesusdriven on Sept 15, 2009 16:45:40 GMT -5
Are those Monster cables new also? I added a couple new Monster cables awhile back and it seriously changed my tone for the worse. I bought a high end Monster speaker cable and it sounded horrible. The reviews were great, but I did not like it AT ALL. I gave it away to a friend and bought a standard 14 ga cable like Scott recommended. The amp sounds great. PS: Hey Stratkiller, I believe that my amp problems before were actually multi effects unit problems. I had the same problems occur with the first replacement Rocktron Xpression that I did with my original one. The 3rd one seems to be doing OK. I guess they have a common problem with their DSP chip. I tested my amp with nothing in the loop using a friends speaker cabinet and it sounded horrible, but I now think that was just his cabinet. I don't think my issue was ever really amp related. I told Scott that I was very sorry to put him through all the trouble with sending it back for repair. He was very cool about the whole deal.
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Post by SmokinPaul on Sept 15, 2009 17:03:46 GMT -5
Oh Boy...........................
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Post by stratkiller51 on Sept 15, 2009 17:28:59 GMT -5
well i changed cables because i though it was the problem and it still did it so i changed back to be sure and it still did it, i took out the tray and my last power tube read 38.9 ma and the rest were 32, 32.5 33.8 on the last one 38.9, i swap it for the first socket and it went down to a 37.9 so i changed tubes from another set and now it reads,32.2,33.4,32.9.33.8 werid? i put all back together and it sounded crisper but not 100% gone, plate voltage was 500,495,496,500,
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Post by jesusdriven on Sept 15, 2009 18:44:20 GMT -5
well i changed cables because i though it was the problem and it still did it so i changed back to be sure and it still did it, i took out the tray and my last power tube read 38.9 ma and the rest were 32, 32.5 33.8 on the last one 38.9, i swap it for the first socket and it went down to a 37.9 so i changed tubes from another set and now it reads,32.2,33.4,32.9.33.8 werid? i put all back together and it sounded crisper but not 100% gone, plate voltage was 500,495,496,500, The difference you are seeing in plate voltage readings is probably due to the Weber Bias Rite not being accurate. You have A,B,C & D leads on your Bias Rite with resistors dedicated to each one. It looks like you have a couple in the middle that are about 4ma off from the others. Your plate voltage will fluctuate with wall current, but it will not drop 4 or 5 ma from tube to tube. I think this is just a case of the Weber only being "so" accurate. My Bias Rite is off by 2ma. I have heard of some being off by 5 ma. Ted Weber swore that all of the components he used were within 1% tolerance for accuracy, but mine is still off by 2ma.
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Post by tonemonster on Sept 15, 2009 20:10:37 GMT -5
Interesting read....... so are these amps really finicky and maintanence intensive??? am I getting into something I will be sorry for? I have never really checked bias on my amps before. I just play em. am I going to need to go to tube amp 101 to be able to own this amp? just curiuos....
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Post by jesusdriven on Sept 15, 2009 20:30:40 GMT -5
Interesting read....... so are these amps really finicky and maintanence intensive??? am I getting into something I will be sorry for? I have never really checked bias on my amps before. I just play em. am I going to need to go to tube amp 101 to be able to own this amp? just curiuos.... The amps are not finicky, but tubes are. I hear that the Compu Bias and the Bias King are much more accurate than the Weber.
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Post by tonemonster on Sept 15, 2009 20:36:41 GMT -5
so is all this biasing stuff really necessary??? Scott said that if I buy the same rated tubes from him I shouldnt have to worry about biasing at all. I basically just want to plug and play. I really dont want to get into having to have a bias tester, especially if they arent even accurate.
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Post by splatter on Sept 15, 2009 21:19:04 GMT -5
Interesting read....... so are these amps really finicky and maintanence intensive??? am I getting into something I will be sorry for? I have never really checked bias on my amps before. I just play em. am I going to need to go to tube amp 101 to be able to own this amp? just curiuos.... No there not maintance intensive but one thing you have to realize is the candle that burns twice as bright burns half as long .I had a marshall 6100 for 10 years and giged with it for 7 of those 10 and never changed the tubes .The reason the tubes lasted so long was because the Marshall like most production amps was biased really cold .I have to change tubes in my splawn about every 6 to 8 months . I do it myself and bias it myself because I want to . You can order your tubes from scott and not have to bias it, that is up to you . Imo the tone I get from my Splawn is well worth dealing with the tube changes . You can buy a production amp and almost never have to change the tubes but it isn't going to sound like a splawn .
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