Quick, but stupid, Valve Amp Question

[benjaturner]

Re: Quick, but stupid, Valve Amp Question

Thanks for all your help Wixedmords. I definately going to look into this as I take guitar playing very seriously and one day hope to make a werious guitar player of myself. I'm going to follow up on the links Scott F posted but for now I think the only smart thing to do would be to take it to a tech.

I've heard a bit about these amps having the calves soldered to the circuit board and this being typical of cheaper valve amps. If this is the case then would it be a good idea financially to get some one to 're-build' the amp, so to speak, and have the valves mounted seperately, or just buy a better amp? I think if I keep it I'm definately going to get a fan fitted. I've read about this being a good idea on Harmony-Central as well.

Thanks again

 

[Scott_F]

Re: Quick, but stupid, Valve Amp Question

most matched power tubes are only matched the first day you put them in. after they get played over many hours, they wear at different rates, ending up not "matched" any longer....

bias is huge though, even if you pick the same type tube with the same rating.... example a Groove Tube 6L6 with an 8 on the label. (hardness factor that they use).

 

[Scott_F]

Re: Quick, but stupid, Valve Amp Question

Thanks for all your help Wixedmords. I definately going to look into this as I take guitar playing very seriously and one day hope to make a werious guitar player of myself. I'm going to follow up on the links Scott F posted but for now I think the only smart thing to do would be to take it to a tech.

I've heard a bit about these amps having the calves soldered to the circuit board and this being typical of cheaper valve amps. If this is the case then would it be a good idea financially to get some one to 're-build' the amp, so to speak, and have the valves mounted seperately, or just buy a better amp? I think if I keep it I'm definately going to get a fan fitted. I've read about this being a good idea on Harmony-Central as well.

Thanks again

I wouldn't spend a lot of money trying to make this amp something that it is not. Take it to a tech and get those melted parts looked at.

 

[Jeff Seal]

Re: Quick, but stupid, Valve Amp Question

benjaturner..... hate to be the bearer of bad news, but the JTM60 is so problematic that even Marshall no longer acknowledge's they exist....

http://www.marshallamps.com

see what you can find!

Jeff Seal

 

[Guitarist]

Re: Quick, but stupid, Valve Amp Question

I always turn on the power with standby engaged and let it warm up in standby for 1-2 minutes.

I always turn off by putting it in standby for 1-2 minutes and then turn off the power.

I'm not that busy that I wouldn't have time with waiting 1-2 minutes before and after playing. I also read in the manual, something like that if I remember right.

That's how I do it. It just makes sense now doesn't it? Warm up the tubes, cool down the tubes.

 

[Quencho092]

Re: Quick, but stupid, Valve Amp Question

i'd much rather take my amp to a tech in these cases, but i never get around to because the only tech in my area is a total dirtbag who charges 100 bucks for replacing selector pots. The guy in my area was hunting for a selector pot for my lexicon reflex reverb unit, and he quoted me 100 bucks to replace it! I can't imagine how much he'd charge for a cap job and a biasing! Then he starts telling me that if he can't get the job done, then nobody can, and i might as well use the unit as a boat anchor! What a douche bag!

This is exactly why so many people like me would rather learn how to do things themselves than take their amp to some ripoff tech that only wants to charge you loads of cash for simple jobs.