Reply to this topicStart new topic
> Are My Tubes Blown?, how can i tell?
Khaos Keith
post Dec 17 2007, 04:13 PM
Post #1


GMC:er
*

Group: Members
Posts: 79
Joined: 16-December 07
From: San Diego, California / USA
Member No.: 3.522



hey guys... im fairly new to guitar amps. i started playing bass and am now switching over to guitar. i was able to start with a marshall half stack as my first set up (hand me downs from my dad haha) but this setup is sooo old, as old as i am and im 22 now haha. so i got a new amp.

tho this isnt a "new" amp, it was a friends and he was getting rid of all his stuff cause he was moving. naturally i jumped right to the opportunity to take some music equipment off his hands haha. i got from him an ampeg tube amp. now i thought it sounded great clean. but the distortion was hooorrrible, i just couldnt get it to sound good so i bought the metal zone distortion pedal to fix that. but why does the distortion on the amp itself not work well at all?

then after sometime, ive played with some people, two of which asked me, "well why doesnt it work? are the tubes blown?" to which i had no answer haha. i ask when how do i know? and they are like "well you can just hear it"... now im assuming i got the amp with blown tubes. so ive never heard what it "could" sound like. so how do i know? could the tubes be blown? and is this fixable? and how can i find out without just buying new ones?

thanks for the help guys this would really be great to get an answer for haha


--------------------
Random Person : "got a myspace page?"

Me : "hahaha who doesn't? the url is

http://www.myspace.com/maidenmayhem

hahah"
Go to the top of the page
 
+Quote Post
Chris Evans
post Dec 17 2007, 04:28 PM
Post #2


Learning Tone Guru - Community Coordinator & Moderator
Group Icon

Group: GMC Senior
Posts: 6.319
Joined: 24-September 07
From: Sittingbourne, UK
Member No.: 2.860



Hi mate, there was a thread on tubes a few days ago here this may help you with your answer smile.gif


--------------------
Show us what part of the world you live in and get yourself
ON THE GMC:er Location MAP
Go to the top of the page
 
+Quote Post
Khaos Keith
post Dec 17 2007, 04:36 PM
Post #3


GMC:er
*

Group: Members
Posts: 79
Joined: 16-December 07
From: San Diego, California / USA
Member No.: 3.522



QUOTE (Smells @ Dec 17 2007, 07:28 AM) *
Hi mate, there was a thread on tubes a few days ago here this may help you with your answer smile.gif


just looked over that page... seemed that other people there were in the same boat as me haha. no one seemed to have a clear answer about it, other then someone saying there are tube testers out there somewhere haha


--------------------
Random Person : "got a myspace page?"

Me : "hahaha who doesn't? the url is

http://www.myspace.com/maidenmayhem

hahah"
Go to the top of the page
 
+Quote Post
Chris Evans
post Dec 17 2007, 05:02 PM
Post #4


Learning Tone Guru - Community Coordinator & Moderator
Group Icon

Group: GMC Senior
Posts: 6.319
Joined: 24-September 07
From: Sittingbourne, UK
Member No.: 2.860



QUOTE (Khaos Keith @ Dec 17 2007, 03:36 PM) *
just looked over that page... seemed that other people there were in the same boat as me haha. no one seemed to have a clear answer about it, other then someone saying there are tube testers out there somewhere haha


Hmm .. apart from whats been said in that thread I`m not sure what to add, I`ve had a quick scan on the net to see if theres any hard and fast answers but they all seems to say pretty much the same thing, that you`ll hear if the tubes have gone, personally I dont own and have never had a tube amp but I think I`d take it to a technician and ask them to test it for me and take it from there.


--------------------
Show us what part of the world you live in and get yourself
ON THE GMC:er Location MAP
Go to the top of the page
 
+Quote Post
Khaos Keith
post Dec 17 2007, 05:07 PM
Post #5


GMC:er
*

Group: Members
Posts: 79
Joined: 16-December 07
From: San Diego, California / USA
Member No.: 3.522



ya ill probably just have to go about it that way since i dont know what it was originally supposed to sound like and this is my friend amp with tubes. thx for the feedback tho smile.gif


--------------------
Random Person : "got a myspace page?"

Me : "hahaha who doesn't? the url is

http://www.myspace.com/maidenmayhem

hahah"
Go to the top of the page
 
+Quote Post
Chris Evans
post Dec 17 2007, 05:09 PM
Post #6


Learning Tone Guru - Community Coordinator & Moderator
Group Icon

Group: GMC Senior
Posts: 6.319
Joined: 24-September 07
From: Sittingbourne, UK
Member No.: 2.860



QUOTE (Khaos Keith @ Dec 17 2007, 04:07 PM) *
ya ill probably just have to go about it that way since i dont know what it was originally supposed to sound like and this is my friend amp with tubes. thx for the feedback tho smile.gif


your welcome, sorry couldnt come up with a firm answer for you smile.gif


--------------------
Show us what part of the world you live in and get yourself
ON THE GMC:er Location MAP
Go to the top of the page
 
+Quote Post
MickeM
post Dec 17 2007, 07:31 PM
Post #7


Born of NWOBHM, Moderation Team Leader
*

Group: Members
Posts: 8.562
Joined: 9-January 07
From: Stockholm, Sweden
Member No.: 1.062



Check the tube cover plate or somewhere in the back for a sticker with the date of the last tube change. If the amp has been used a lot (like every other day) and last tube change was 2 yrs ago my guess is that you'd have to change the Power tubes. Otherwise if it's barely used and it's quality they could last up to 10 years I'm sure.
Which in turn is not entirely true since tubes can break if the amp is moved around a lot.

Turn the amp on, atch the tubes, play at different volumes and watch the power tubes the entire time. If they don't glow equaly much that could be a sign of that something is wrong. And if one is faulty you have to change all of them /still talking about power tubes)

Check if the tubes are clean on the inside, if there's a layer of film inside it's leaking = broken.

If when you hit a note it comes with a low frequent buzz, a squeek or similar tubes are likely broken.

Regarding pre amp tubes I'd just go by the last changed date and count it so they are changed every send or third time the power tubes are changed.

And in general, if they sound crappy why not just change them. It can't get worse, right?

QUOTE (Khaos Keith @ Dec 17 2007, 04:13 PM) *
i was able to start with a marshall half stack as my first set up (hand me downs from my dad haha) but this setup is sooo old, as old as i am and im 22 now haha. so i got a new amp.

What???? A 22 year old Marshall tube amp or? You're so lucky!


--------------------
Go to the top of the page
 
+Quote Post
Khaos Keith
post Dec 17 2007, 08:41 PM
Post #8


GMC:er
*

Group: Members
Posts: 79
Joined: 16-December 07
From: San Diego, California / USA
Member No.: 3.522



QUOTE (MickeM @ Dec 17 2007, 10:31 AM) *
Check the tube cover plate or somewhere in the back for a sticker with the date of the last tube change. If the amp has been used a lot (like every other day) and last tube change was 2 yrs ago my guess is that you'd have to change the Power tubes. Otherwise if it's barely used and it's quality they could last up to 10 years I'm sure.
Which in turn is not entirely true since tubes can break if the amp is moved around a lot.

Turn the amp on, atch the tubes, play at different volumes and watch the power tubes the entire time. If they don't glow equaly much that could be a sign of that something is wrong. And if one is faulty you have to change all of them /still talking about power tubes)

Check if the tubes are clean on the inside, if there's a layer of film inside it's leaking = broken.

If when you hit a note it comes with a low frequent buzz, a squeek or similar tubes are likely broken.

Regarding pre amp tubes I'd just go by the last changed date and count it so they are changed every send or third time the power tubes are changed.

And in general, if they sound crappy why not just change them. It can't get worse, right?
What???? A 22 year old Marshall tube amp or? You're so lucky!


thanks! ill check all that out... hahaha no the marshall amp isnt a tube amp its the ampeg that is... but yes that marshall is alittle over 20 years old haha... its pretty much falling apart. tho it was that way when i got it from my dad. it was his amp for gigs and stuff so its got so wear and tear damage haha

PS: any idea on what it would cost to change out all the tubes for new ones in the ampeg?


--------------------
Random Person : "got a myspace page?"

Me : "hahaha who doesn't? the url is

http://www.myspace.com/maidenmayhem

hahah"
Go to the top of the page
 
+Quote Post
JVM
post Dec 17 2007, 11:44 PM
Post #9


Learning Roadie
*

Group: Members
Posts: 2.878
Joined: 2-June 07
From: Raleigh-Durham, NC
Member No.: 1.984



Hey MickeM, I when I switch my amp from standby to on, one of the power tubes flashes blue fairly strongly - is that okay? The other one might be doing it too, I can't really tell, but if it is its much less obvious than the other (I think it might just be a reflection of the other tube though).

[edit] BTW, if you remember, I bought this used. I kind of doubt the tubes have ever been changed, there's no sticker or anything on the back. It's at least a few years old, but I'm not sure how much it was used before I bought it, though it had a little wear and tear.

This post has been edited by JVM: Dec 17 2007, 11:46 PM


--------------------
Gear: Fender American Deluxe Stratocaster, Gibson '67 RI Flying V, Mesa Boogie F-30 112 combo, crazy pedals.
Go to the top of the page
 
+Quote Post
Khaos Keith
post Dec 18 2007, 12:32 PM
Post #10


GMC:er
*

Group: Members
Posts: 79
Joined: 16-December 07
From: San Diego, California / USA
Member No.: 3.522



i found a good site on it all

http://www.athensmusician.net/archive/2004-04-23_tubes.php


--------------------
Random Person : "got a myspace page?"

Me : "hahaha who doesn't? the url is

http://www.myspace.com/maidenmayhem

hahah"
Go to the top of the page
 
+Quote Post
MickeM
post Dec 18 2007, 03:42 PM
Post #11


Born of NWOBHM, Moderation Team Leader
*

Group: Members
Posts: 8.562
Joined: 9-January 07
From: Stockholm, Sweden
Member No.: 1.062



QUOTE (JVM @ Dec 17 2007, 11:44 PM) *
Hey MickeM, I when I switch my amp from standby to on, one of the power tubes flashes blue fairly strongly - is that okay? The other one might be doing it too, I can't really tell, but if it is its much less obvious than the other (I think it might just be a reflection of the other tube though).

[edit] BTW, if you remember, I bought this used. I kind of doubt the tubes have ever been changed, there's no sticker or anything on the back. It's at least a few years old, but I'm not sure how much it was used before I bought it, though it had a little wear and tear.

Just a guess but I don't think that's due to worn tubes, when you go from standby to On you will increase the voltage. Maybe it's not running on the correct voltage on standby so the "jump" is too high. Might want to check the bias there but I suppose there's no panic.


--------------------
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 


RSS Lo-Fi Version Time is now: 26th May 2017 - 01:02 AM