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Discussion in 'Gear & Equipment' started by 7 Dying Trees, Nov 24, 2007.
late reply i know, but i just read it and wanted to add a quote from the Diezel guys:
I think it depends on how the amp is designed?
On my Marshall 6101 when I put it in standby, the signal will slowly drop out and distort until it's gone. Clearly a sign of the caps discharging. It does the same if you just turn it off (I'll see if there's something in the manual that recommends how to turn it on/off).
Aside from that, modern amps are required to have 'bleed resistors' on the caps. Basically this is an artificial leak, which ensures that the caps will always discharge to ground. I'm not sure how long it actually takes for the caps to bleed empty however, but it's probably below lethal levels in only a few seconds at most, so it's probably safe enough to open the amp right after it's turned off/unplugged.
Vintage amps are a death trap however. If I see how some of those old 50s/60s Fender amps were built... geez, I'd be scared to go near one.
Modern amps have bleed resistors, yes, but I've had a mid-late 90's rivera amp that retained charge for a very very long (as in keeping the standby light lit up) which would happen if you flipped the standby on, the powered off, as opposed to powering off.
It's not required by any means, ie, modern amps as you point out, however, as a general hard and fast rule, especially when dealing with vintage amps (ie, the ones you should not try to service unless you know what you are doing, or how to discharge caps) it works.
what's an amp load i have to get then?
and also i have another question.
if an amp's bulbs are supposed to glow red and have faded what wpuld be a good way to make them red again? i thought maybe a paint pen, what would be the best way you think?
thanks again everyone
Awesome Thread, Jimbo! If only I could memorise that list I'd land a job as a sales rep a little quicker
you've got to be shitting me, dude...
So that's why the tubes in my amp went bad.
Well I guess after 10 years or so that was expected.
I really didn't know the standby switch had such a purpose though until now.
You know what I just realized seems to be missing from this thread? Descriptions of how to tell when your tubes need to be replaced.
MetroAmp.com Forum • View topic - Decription of output tube types....
Popsyche posted this link a while back and it's very good at explaining different power amp tube types.
My cab is 8 Ohms and amp says 8-16 Ohms. What does that mean?
dam, i hade a pig nose tube practice amp that i ended up selling a long time ago, i would use it as a head for a marshal half stach i had
anyway u can also change the tubes out really easy and experiment with the way dif tubes sound
Means your head can either run into a 8ohm cab, or a 16ohm cab. Use whatever setting on the head matches your cab.
Tube amps kicks solid states ass.
Solid state -> Tube amps.
I sort of figured, but what's keeping me worried is what the manual mentioned as "transformer damage due to a no-load scenario" possibility. Here are shots of the head outputs and cab input:
I normally plug into the upper center jack.
How should I properly do this? Use the upper right jack, and put the shorting plug into the one underneath it? Sorry to bug you about this
Not entirely true, at all. I'd quit believing that now, it will make your life much easier.
This is so very true. Stop believing all the tube amp being better hype. Just got back from my local music store and played a Line 6 Spider III. Made my life much easier. I was amazingly able to play so much cleaner without one mistake and pinch harmonics on command! Then I got home and plugged into my Engl Tube amp.
Compared to the Line 6 I was horrible I could hear all my mistakes and gosh darnit I had to work at it to sound good.
Lol, just messing around but seriously the one thing I hate about solid state amps are that they IMO make it so much easier to play that some do not realize how sloppy their playing is until they have gone with the tube route(my life story)This is just my opinion......but As far as recording purposes I have grown fond of what some solid state units can do....but oh the warmth of a nice tube powered amp is the best.
if i set my tubescreamer to the max and the gain on my DC-5 to 10 i get the same effect you need to be more gentle with the gain on most SS amps since they have buttloads of it
but yea me likey tubes altho i would kill for an axe-fx but then again thats the holy grail of amps imo
What amp is it? You'r eprobably ebst off starting a new thread in the gear section, as someone will have owned one of whatever mesa it is at some point and be able to help you
the shorting jack worries me, plugging in a lower load to an amp can actually fry the oputput transformer and all the valves, so a shorting jack sounds like suicide unless it autodetects it inside, but, I don't know what the amp has or whether it has something like that in it.
It's a Road King 2. I already started a thread a long time ago, but without pics I guess no one really had any idea what I was on about It's here: http://www.sevenstring.org/forum/gear-and-equipment/112163-cab-impendance-question.html
And this is the rear panel view, from Mesa's website: Mesa Boogie Road King Rear Panel Enlargement
There are channel-specific switches that allow you to choose whether you use only cab A, only cab B, or both A + B. I always keep them only A, so it shouldn't try to put anything through the B jacks, right? What I've understood from the manual is that IF I were to suddenly switch to B, I'd destroy something unless the shorting plug were placed in the relevant B jack.
Hey I've got a question for ya and I'm new to tube amps.
Is there any kind of an list to what are the differences between tube manufacturers? I've been thinking of getting a Engl E530, which uses 2xECC83 tubes. A quick google shows that at least Sovtek, JJ and Mesa make these tubes, with varying prices, but I have no idea of the differences. I'm assuming there is one, since people often also tell who's tubes they have when they are discussing their tube amps.
Now before a flame war starts, I did use search but didn't find any straightforward enough answers. Also, I'm not asking what are the best tubes, but what are the differences in general.
Construction, longevity, quality of components.