My amps distortion has all of a sudden gotten really disgusting. It used to be great, now it sounds all gritty and fuzzy sounding. I have a Classic 50, it's at least 5 years old (I'm not sure, I'm not the original owner), and the tubes have never been changed. At first I thought it was the pickups on my new Carvin that sucked, but I plugged in my Squier and my Ibanez and it sounded the same. Could it be that I need new tubes? Maybe the active electronics in my Carvin somehow messed up my amp?
Disgusting!
- Thread starter ankalar
- Start date
D
DeadSkinSlayer3
Guest
Re: Disgusting!
http://www.revolutionguitar.com
Get yourself some JJ's, cheapest place, fastest shipping.
http://www.revolutionguitar.com
Get yourself some JJ's, cheapest place, fastest shipping.
StrykeBack
New member
Re: Disgusting!
How about a low hum or buzzyish crackling sound after the sound has decayed? I play some heavy distortin chords and its almost like a faint pitch whistling at certain times. could that be my tubes? I just recently got it but it was a shop demo.
How about a low hum or buzzyish crackling sound after the sound has decayed? I play some heavy distortin chords and its almost like a faint pitch whistling at certain times. could that be my tubes? I just recently got it but it was a shop demo.
StrykeBack
New member
Re: Disgusting!
hmm problem is I'm a newbie..though I'm pretty good at electronics...which ones are which? I've got an ashdown peacemaker 20 watt. also, last time I took it apart to replace the power memter, I read that the tubes were sovteks...I've heard that there are better tubes you can replace those with to get a better tone. What are some nice tubes that will realy improve those ones?
hmm problem is I'm a newbie..though I'm pretty good at electronics...which ones are which? I've got an ashdown peacemaker 20 watt. also, last time I took it apart to replace the power memter, I read that the tubes were sovteks...I've heard that there are better tubes you can replace those with to get a better tone. What are some nice tubes that will realy improve those ones?
Re: Disgusting!
9 times out of 10 the problem is indeed the tubes. Are you sure its fixed bias? Most modern amps have an adjustable bias pot inside them to adjust the bias for each type of tube... just takes a moment with an oscilloscop to do it, I'm told.
Find out whether the amp is fixed bias first. If it is then you'll need to contact peavey or the tube manuf. to get the correct replacements. If its not then get some JJ's and have a tech see to it.
What kind of power tubes does this amp use? I mention this because EL84's do not need biasing. I think the 50 uses 6L6's though.
9 times out of 10 the problem is indeed the tubes. Are you sure its fixed bias? Most modern amps have an adjustable bias pot inside them to adjust the bias for each type of tube... just takes a moment with an oscilloscop to do it, I'm told.
Find out whether the amp is fixed bias first. If it is then you'll need to contact peavey or the tube manuf. to get the correct replacements. If its not then get some JJ's and have a tech see to it.
What kind of power tubes does this amp use? I mention this because EL84's do not need biasing. I think the 50 uses 6L6's though.
StrykeBack
New member
Re: Disgusting!
I was going to say, I've got 2 larger tubes closest to the back of the amp, and then 3 smaller ones up the front. How about I just swap them all out with really nice tubes to start fresh. Can anyone give me an approximation of how much that would cost and what normal installation would be as far as biasing them? My father is an electrical engineer and has scopes and meters and what not and we could probably do it if I found some documentation.
I was going to say, I've got 2 larger tubes closest to the back of the amp, and then 3 smaller ones up the front. How about I just swap them all out with really nice tubes to start fresh. Can anyone give me an approximation of how much that would cost and what normal installation would be as far as biasing them? My father is an electrical engineer and has scopes and meters and what not and we could probably do it if I found some documentation.
Re: Disgusting!
B2D, the Classic 50 does not have a biasing pot, I believe there is a mod you can do to add a biasing pot to it though. It does use EL-84s, so does that mean I do not need to bias them? Is it any more complicated then just taking out the old ones and putting in the new ones?
B2D, the Classic 50 does not have a biasing pot, I believe there is a mod you can do to add a biasing pot to it though. It does use EL-84s, so does that mean I do not need to bias them? Is it any more complicated then just taking out the old ones and putting in the new ones?
Buckeyedog
New member
Re: Disgusting!
Deadskin is right on, check revolutionguitar and get JJ power tubes and some EH pre amp tubes and you'll be fine. Just plug them in and go. You can also get with Bob at eurotubes.com as he is strictly a JJ tube vendor. He knows all about the peavey classic amps and can set you up with a set of power tubes. I have tried the JJ pre amp tubes and thought they were ok, but I like the EH, Sovtek LPS, Ei, or chinese one's best. JJ power tubes are awesome though. If you think your classic is somewhat bright, the JJ pre amp tubes can darken it some.
Deadskin is right on, check revolutionguitar and get JJ power tubes and some EH pre amp tubes and you'll be fine. Just plug them in and go. You can also get with Bob at eurotubes.com as he is strictly a JJ tube vendor. He knows all about the peavey classic amps and can set you up with a set of power tubes. I have tried the JJ pre amp tubes and thought they were ok, but I like the EH, Sovtek LPS, Ei, or chinese one's best. JJ power tubes are awesome though. If you think your classic is somewhat bright, the JJ pre amp tubes can darken it some.
Re: Disgusting!
I had a Fender Blues Jr for a short time and the manual said that I did not need to have the amp biased when replacing power tubes because it was an EL84 based amp. I've also heard some other people on here mention that as well... can anybody verify this?
ankalar said:
I had a Fender Blues Jr for a short time and the manual said that I did not need to have the amp biased when replacing power tubes because it was an EL84 based amp. I've also heard some other people on here mention that as well... can anybody verify this?
