IronMaiden
Joined: Nov 02, 2006
Posts: 564
Virginia Beach
|

Posted on May 12 2007 08:58 PM
Ok whats the deal with tubes? What do you guys use in your amps? How much difference does a tube make as far as sound?
I have a RI twin reverb with stock groove tubes in them, and a recently aquired showman with svetlanas in them. Id like to possibly use the same tubes for both amps, or is this a bad idea?
If say, I get either amp, or both, rebiased for say some NOS tubes are these things always available? Will they run out at some time thus making me rebias the amp(s) again?
I dont dont diddly about tubes (or amps) so any help would be appreciated.
|
eddiekatcher
Joined: Mar 14, 2006
Posts: 2778
Atlanta, GA
|

Posted on May 12 2007 09:05 PM
I have had the best luck with Ruby output tubes. So far the ones I've used (matched quads) have sounded really good and lasted a long time. I've tweaked the bias of my quad 6L6 amps from one end to the other and usually end up at about -52v. My amps seem to run slightly cooler at about this point. I use Gerald Weber's method to set the bias. I plug it in, load it down and play till I run my wife nuts upstairs and all the while monitoring the bias voltage with a digial volt meter. When the amp sounds happy, I'm happy........ed
— Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps?
|
IronMaiden
Joined: Nov 02, 2006
Posts: 564
Virginia Beach
|

Posted on May 12 2007 09:14 PM
eddiekatcher
I have had the best luck with Ruby output tubes. So far the ones I've used (matched quads) have sounded really good and lasted a long time. I've tweaked the bias of my quad 6L6 amps from one end to the other and usually end up at about -52v. My amps seem to run slightly cooler at about this point. I use Gerald Weber's method to set the bias. I plug it in, load it down and play till I run my wife nuts upstairs and all the while monitoring the bias voltage with a digial volt meter. When the amp sounds happy, I'm happy........ed
Dude, you have to dumb it down a tad..."Matched quads" just means the 4 big ones are the same right?
|
eddiekatcher
Joined: Mar 14, 2006
Posts: 2778
Atlanta, GA
|

Posted on May 12 2007 09:25 PM
Something like that. The big 4 tubes on the left side looking at the amp from the back are the outputs. The "matched" business is supposed to insure that all four have very similar operating parameters.
Now here's a little lesson.....An audio signal is kind of like a sine wave, up an down and up and down, right?....OK
Most small amps use two tubes in their output stage, one to amp the up signal half and the other to amp the down part. Push / Pull.
On higher powered amps generally speaking they use four output tubes, two up and two down Push / Pull with two sets of two running in parallel. So the tube companies try to convince us that "matched" sets of either two or four are better. I frankly don't know for sure.
Some really high powered guitar/bass amps use three on each side, Ampeg SVT and Fender's Rumble Bass amp...........big time fun.....ed
— Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps?
|
ajarvez
Joined: Apr 03, 2007
Posts: 33
Winter Park, FLA
|

Posted on May 12 2007 10:09 PM
In addition to the aforementioned Rubies, I can highly recommend both the Electro-Harmonix 6L6GC's (currently gettable from Reverend Guitars for like $23 a matched pair!) and the Sovtek 5881's (usually around ten bucks a pop). If you're aiming to use the same tubes in both the TRRI and the Showman, I'd go for the Sovteks; they won't break yer bank account, and they are especially well-suited for surf sonics. NOTE: do NOT confuse the Sovtek 5881 with the Sovtek 6L6! The latter is by all accounts pretty crummy sounding by comparison. The 5881's come in both a large base & small base form; pick the large base if you have the "wing" style tube retainers in your amps. If you have the spring-n-halo retainers, either one'll do swell.
In a case like this, I wouldn't bother doing the NOS thing, especially with eight tubes to contend with. The aforementioned current models sound as good as you'd want, for a fraction of the price. Another thing to consider is that a lot of the NOS "mojo" has to do with tubes' distortion characteristics, and as you know, the Twin Reverb & Showman's power stages very, very seldom get pushed into distortion territory. A Deluxe or Bandmaster might be a different story altogether... but for high-power rigs like yours, stick with the Sovteks. Heck, you could practically buy another amp with the money you'd save on tubes...
|
D22
Joined: Apr 20, 2006
Posts: 2056
|

Posted on May 13 2007 11:32 AM
Get JJ's for the output tubes if you're low on cash. I'd go with Winged "C" for best tone. Pricewise, they are 50%+ more than the JJ's.
For the preamps, JJ ECC83's work very well for a vintage tone. If you want something with a little more high end and bite I would recommend the Electro Harmonix 12AX7's.
Lately, it's been very difficult finding good quiet ones on the market meaning you'll have to buy a batch of them and try them out and find some quiet ones but they are by far my favorite miniature for a preamp.
—
|
IronMaiden
Joined: Nov 02, 2006
Posts: 564
Virginia Beach
|

Posted on May 13 2007 12:22 PM
Hey guys great info thanks!
I just have a dumb question, how do I remove the tubes? I took a pic of my showman to show what 'style' the holders are or whatever, are these 'halo' that someone mentioned. (I keep forgetting its a dual showman, if that makes a difference as far as tubes go.)
Also, do the little tubes have to match with the big ones or just each other? And finally, which tube powers the tremolo in the showman and the trem/reverb in my TRRI?
Thanks!

|
Brian
Joined: Feb 25, 2006
Posts: 19354
Des Moines, Iowa, USA
|

Posted on May 13 2007 01:31 PM
Only the power tubes (the big 'uns) need to be matched.
To remove, just gently and slightly rock them and pull them straight out.
Download one of the many schematics on the web and you can tell which one is used in the tremolo circuit.
— Site dude - S3 Agent #202
Need help with the site? SG101 FAQ - Send me a private message - Email me
"It starts... when it begins" -- Ralf Kilauea
|
P2gee
Joined: Jul 05, 2006
Posts: 264
Waco Texas
|

Posted on May 13 2007 02:29 PM
I too can speak favorably for the Electro Harmonix 6L6's thats whats in my ProRev right now. I have heard plenty good of JJ's too and I have a pair of them in waiting. If I get time, I may swap in the JJ's and do an AB comparison with the Electros. As for removing your tubes you need to try and spread the metal wings gripping the base a little bit while pulling the tube straight down. Kind of a two handed job although I have gotten to where I can do it with one. If the metal wings do not grip the base of the new tube when you install it you need to re tension them so they do.
— 2012-2013: FILTHY POLAROIDS
|
dp
Joined: Feb 26, 2006
Posts: 3546
mojave desert, california
|

Posted on May 13 2007 03:29 PM
I have used the JJ Tesla tubes, and the Ruby tubes...both have worked well for me.
|
Anonymous
Joined: Nov 10, 2000
Posts: -180
|

Posted on May 13 2007 07:49 PM
|
IronMaiden
Joined: Nov 02, 2006
Posts: 564
Virginia Beach
|

Posted on May 13 2007 08:05 PM
surfdaddy
: tubes may be from the defunct school of thought peace
I dont know about that, I went to a HC show on Friday (Zombie Squad, Resonance, Bottled Aggression) and all the bands were using tube amps (marshall jcm 800/2000, and even a vintage orange head w/ blonde avatar cab),
And were talking 16-20 year old kids.
But yeah, your right about sounding good for surf, but also they sound good for anything.
|
Anonymous
Joined: Nov 10, 2000
Posts: -180
|

Posted on May 13 2007 08:43 PM
yes they do sound good. but i have heard tube amps amps that sound like shit and solid state amps that sound great. my point was---tubes are an old technology--they are fairly unreliable, they are environmentally speaking horrors to produce and only luddite guitar players seem to want their continued existence and production. solid state technology has taken over---------pcs, stereos, anything related to computers, your ipod thing, tvs. whatever. tube are dinosaurs on their last legs. the number of musicians still clinging to the use of tubes is miniscule at best. kinda of like women getting the vote--the days of women not being allowed to vote are gone. time moves on iron. sorry for the problem with my point. the tube tyranny will pass eventually and rock and roll eventually will pass too. not my rules---its THE WAY things are, all things must pass. i've got a blues jr with tubes but it ain't forever. sorry for the rant, just my opinion. peace
|
eddiekatcher
Joined: Mar 14, 2006
Posts: 2778
Atlanta, GA
|

Posted on May 13 2007 09:27 PM
Hey Surfdaddy. I appreciate your frustration but.......Tube amps will be around for YEARS. Especially in live music (guitar) amplification. Try as hard as they may, No manufacturer has matched the feel that tubes produce. Most guitarists play better when their amp becomes an extension of their analog fingers. Sorry dude transistors and hybrid circuts just sound and feel cold......Nothing "sings" like a tube with the plate voltage and bias pushed to the limit.......ed
— Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps?
|
IronMaiden
Joined: Nov 02, 2006
Posts: 564
Virginia Beach
|

Posted on May 13 2007 10:06 PM
IronMaiden
all the bands were using tube amps
And were talking 16-20 year old kids.
This is true for Id say 99 percent of every show I go to.
I dont see tube amps dying out, or Rock and roll either.
|
P2gee
Joined: Jul 05, 2006
Posts: 264
Waco Texas
|

Posted on May 13 2007 10:27 PM
Yhe only solid state amp I ever heard that came close to the warm tube sound was Lab Series amp designed by Bob Moog and sold by Gibson in the 70's. A buddy of mine had one and it was a pretty nice piece for the time.
— 2012-2013: FILTHY POLAROIDS
|
ajarvez
Joined: Apr 03, 2007
Posts: 33
Winter Park, FLA
|

Posted on May 13 2007 10:54 PM
Keep in mind, too, that when a tube amp goes kaput -- which doesn't actually happen all that often, in my experience -- it's generally not that big a hassle to fix (the exception being some of the newer channel-switching "all-tube" amps such as the Hot Rod Deluxe et al, which actually have a dizzying amount of op-amps & other solid-state stuff in 'em). When a solid-state amp dies, often it meets the same fate as the modern TV & radio when they get problems - straight to the scrap heap! And I can tell ya THAT ain't an environmental delight either!
It's true there's lotsa great-sounding solid-state amps out there, but the problem is, for them to sound anywhere as good as a tube is gonna take like a dozen parts for every one in a tube amp. And asided from the arguable tonal benefits, with fewer parts involved, tube amps have a lot fewer things to go bad -- and ironically, are probably MORE reliable than solid-state as a result. The only tube amps I've seen crap out live have been at least thirty years old (usually silverface Twins beat all to hell!), and way overdue in terms of maintenance. Considering ya almost never SEE a thirty-year-old solid-state amp still in service, it's hard to compare reliability in this circumstance. But one significant thing I've noticed: the tube amps I've seen crap out onstage were back in action a gig or two later. The solid-state amps I've seen crap out, alas, were never seen again. Not only are they harder to diagnose & fix -- a lot of shops won't even bother -- but it usually just isn't worth the money to GET 'em fixed. It doesn't make sense to spend $200 to fix a $350 amp that you got for its purported reliability, and most repairmen'll even tell ya that upfront.
Don't get me wrong, I'm no Luddite by any means, and I have no problem using solid-state stuff when it sounds good (or wonderfully awful). But honestly, I think the whole idea of it being more reliable & efficient is a complete myth*. I think the best reason to use solid-state equipment is for the price. No shame in that! You can get some great-sounding, versatile combos for peanuts these days -- but honestly, if one of those conks out on the road, you've HAD it... there ain't NOTHIN' you can do. With a relatively lo-tech tube amp, though, you can pack some extra tubes, a spool of wire & a soldering gun, and you're protected against most anything that's gonna happen to ya...
(... knock on wood...)
*(And a lot of this is due to modern manufacturing methods as much as anything. I've got an old Peavey Standard transistor head that is an absolute MONSTER, totally bulletproof, which has withstood all manner of abuse & neglect without a whimper -- but if ya look inside, it bears NO resemblance to the spit-em-out boards ya see today).
|
ShaunNecro
Joined: Mar 06, 2007
Posts: 524
Bay City (Michigan)
|

Posted on May 14 2007 12:05 AM
surfdaddy
yes they do sound good. but i have heard tube amps amps that sound like shit and solid state amps that sound great. my point was---tubes are an old technology--they are fairly unreliable, they are environmentally speaking horrors to produce and only luddite guitar players seem to want their continued existence and production. solid state technology has taken over---------pcs, stereos, anything related to computers, your ipod thing, tvs. whatever. tube are dinosaurs on their last legs. the number of musicians still clinging to the use of tubes is miniscule at best. kinda of like women getting the vote--the days of women not being allowed to vote are gone. time moves on iron. sorry for the problem with my point. the tube tyranny will pass eventually and rock and roll eventually will pass too. not my rules---its THE WAY things are, all things must pass. i've got a blues jr with tubes but it ain't forever. sorry for the rant, just my opinion. peace
I agree with saying that solid state amps are very popular, but I only think it is because of their cheap factor compared to tube amps. Most people (I would say at least 75%) would rather have tube amps, but they just can't afford them. Musicians are the only real reason tubes are still made in my opinion though.
— I am super sweet
www.myspace.com/thetremblors
|
JakeDobner
Joined: Feb 26, 2006
Posts: 12159
Seattle
|

Posted on May 14 2007 12:12 AM
The percentage of professional guitarists that use tubes over solid state must be astronomical.
|
LHR
Joined: Aug 23, 2006
Posts: 2123
The jungle
|

Posted on May 14 2007 03:05 AM
I am really fond of NOS RCA 12AX7A. Love 'em. The black plate kind are very nice.
Also, deals are still out there for the NOS Philips JAN 12AT7WC, a respectable and very rugged tube for your reverb circuit or outboard.
But, really, I wonder why people buy Chinese preamp tubes. These types of tubes last so long in your amp. So getting tested, NOS Raytheon, Mullard, Brimar, Amperex, etc. tubes on eBay for only a wee bit more money makes sense. There is no comparison tone-wise to those harsh, noisy modern Asian and Russian tubes. Just my opinon, of course.
And surfdaddy has a point. The damned tubes burn out pretty quick and at the worst possible moment. The whole question of tube vs. solid state (or modern PC-board amps for that matter) reminds me of when I owned a Volkswagen beetle: broke down frequently yet easy to fix. (Not to say that tube amps are analogous to the little pancake engine that could barely climb the driveway!) So, in a way, my beetle was a reliable car. I knew that with a minimum of fuss I could get it back on the road almost no matter what the problem. My buddy with the late-model Volkswagen Rabbit, well, he was not so lucky if had trouble. There is a definite "Zen and the Art of Motorcycle Maintenance" quality to playing an old tube amp.
That said, I have high hopes for the so-called "Class-D" amps. The Crate Powerblock is an example of this type, I think. They output an actual digital signal. Think about that for a sec...the speaker is the D/A convertor! Anyhow, the efficiency of these systems is mind-blowing and a fairly small op-amp type circuit makes it run. They can be produced very cheaply and, of course, with minimal heat dissipation. The possibility of using digital signal processing in the tone stack is obvious also. Anyhow, I am waiting for these to start showing up in quality gear.
— SSIV
|