#1
I've only been playing 3ish years, so i haven't had much experience when it comes to tube amps. Not too long ago, infact, comming upto a year ago, i started looking for a new amp because my marshall 50DFX was terrible. I was told about tube amps sounding better, especially when played loud so i ventured into getting a Line6 Spider Valve, even though i hadn't been a fan of the other spiders, it sounded a great deal at the time.

but already, the tubes have started popping, but looking at them they seem to look the same as when i bought it. So how do i know which out of the 4 tubes needs replacing? Or should i just save up and replace all 4?

And also, how hard is it to replace tubes, my dad a self confessed know it all, and an electrician believes he could change them even when he didn't know amps had tubes until i told him mine were stale. Should i let him have a play around or just find and pay a professional?
#2
Quote by L-Roberts91
I've only been playing 3ish years, so i haven't had much experience when it comes to tube amps. Not too long ago, infact, comming upto a year ago, i started looking for a new amp because my marshall 50DFX was terrible. I was told about tube amps sounding better, especially when played loud so i ventured into getting a Line6 Spider Valve, even though i hadn't been a fan of the other spiders, it sounded a great deal at the time.

but already, the tubes have started popping, but looking at them they seem to look the same as when i bought it. So how do i know which out of the 4 tubes needs replacing? Or should i just save up and replace all 4?

And also, how hard is it to replace tubes, my dad a self confessed know it all, and an electrician believes he could change them even when he didn't know amps had tubes until i told him mine were stale. Should i let him have a play around or just find and pay a professional?

How long have you had the amp? I've never heard of popping as a sign of bad tubes.

As for replacing them, you'll want to do all 4 so they are a matched set. I'm not sure if that amp is a fixed bias, but I imagine it is. This means it will need biasing after you replace the tubes. If your dad has a multimeter (which he does, I'm sure) and can find contact points and test voltages and adjust (which he can, I'm sure) then he can do it.

I think there are youtube videos on biasing, maybe even for that amp.
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#3
Thanks for the quick reply. I bought the amp in last october, but that was second hand, the bloke before me had it a year, bought from new, so its comming up to two years old.

I read something the other day about tubes causing popping sounds (so i think) i'l have alook for that again now. But also i presumed it was the tubes because i've not seen them glow in a while either. When i first bought it, the tubes would be glowing within minutes of playing around 1-2 on master, but even on 5-6 on master they still seem very dim/not glowing at all.

If tubes were not the likely cause of the popping sound, what could be causing it?

Also after the first few sets of popping the sound will go really quiet and muddy.

Usually if i just flick the amp into standby for a minute or two then flick it back on, it'l work fine again for a while.
Last edited by L-Roberts91 at Sep 30, 2009,
#4
Hmm i cannot find that page i thought i read. Perhaps i made it up :S This is all i found to do with popping (simular content on other sites)

http://www.geofex.com/ampdbug/popping.htm

The popping noises isn't constant though. Yesterday it was popping and going quiet every few minutes, it hasn't popped once today. Which would make it more annoying to show it to a specialist to sort out.
#6
Nah its a definate pop, and much louder than the volume i play at. Say i'm playing at master 1, the pop will sound around master 3-4. Then after the popping stops, the volume will dramtically decrease and sound, far more fuzzier than the distortion is meant to be.