All About Valves

Talk about the rest of the rig - amps, effects, valves, leads, wireless set-ups, racks, anything that brings out the best in your axes.
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KH Guitar Freak
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Re: All About Valves

Postby KH Guitar Freak » Sat Apr 11, 2009 9:20 pm

Oh yeah, tried a Mesa SPAX7 preamp valve in position V1 of my Roadster, now it's quieter, and the attack and response is more immediate now... 8-)

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Re: All About Valves

Postby guitarhero » Fri May 08, 2009 10:21 am

Hay got a question bout valves um got a krank revo and the sound keeps droping up and down lateley. It happens when u push the volume up could this have sumthan 2 do with the tubes??? Ive had the amp bout 3 years now and really hasent been pushed just bedroom use um ive had the power tubes replaced with mesa 6l6 powertubes they are all lit up good. But my preamp tubes are still origanal and they dont seem to light up as much is that a sign they need 2 be replaced???? Or could this b another problem. Thanx Also anyone no if krank have to bias or can u wack them in yourself??
THANX

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Re: All About Valves

Postby diablo272 » Fri May 15, 2009 5:16 am

Does the volume fade in and out, or is it the distortion that fades in and out? If it's the volume then a power tube might be going bad, if it's the distortion/gain then it may be the preamp tubes. Tap the power tubes GENTLY with a pencil eraser while the amp is on and if the amp makes any noise when you do that, you've found the bad tube, though there could be more than one bad tube.

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Re: All About Valves

Postby sebtones » Sun Jun 07, 2009 9:49 pm

Fikealox wrote:In a "push-pull" configuration the signal is first split into two halves, 180 degrees “out of phase” with each other. The “pluses” are amplified by one tube, and the “minuses” are amplified by another tube. Then the two signal halves are “recombined” in the output transformer back into a single-ended voltage to drive the speaker. Picture a shower faucet with separate Hot and Cold valves where the water mixes together and all comes out of one spout.

Most power amplifiers use the push-pull configuration because it enables the output tubes to operate much more efficiently --producing more power from fewer tubes with less waste heat, and we’ll explain how a little later. Meanwhile, note that push-pull requires two power tubes minimum though additional pairs may be added “in parallel” to increase the power. That is why you always see two, four, six or sometimes more big power tubes in an amplifier, but always an even number.

(from an article by Randall Smith, not totally verbatim)

thats the best explanation ive heard yet... NOW it makes sense, thanks 8-)

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unearth
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Re: All About Valves

Postby unearth » Sun Sep 13, 2009 7:04 pm

Gonna chuck some 6L6 power valves in my randall rg50tc, whats a good brand?

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Re: All About Valves

Postby FOT » Sun Sep 13, 2009 7:10 pm

JJ's do some good ones... Ruby also

goto www.dougstubes.com

If you can't find what you want there, then what you want doesn't exist :P hehehe

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Re: All About Valves

Postby M2k » Sun Sep 13, 2009 7:51 pm

but make sure there not left handed tubes when you check out
s_m_g wrote:Can someone translate this thread to guitar so I can understand what the hell you're all talking about?

I had Octoban once, it was kind of like calamari but a bit chewier.

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Re: All About Valves

Postby FOT » Sun Sep 13, 2009 7:53 pm

M2k wrote:but make sure there not left handed tubes when you check out


Your dad should have wiped you off on the curtain all those years ago....

:smt011

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Re: All About Valves

Postby Runjikol » Sun Sep 13, 2009 10:19 pm

Dave The Fot wrote:JJ's do some good ones... Ruby also

goto http://www.dougstubes.com

If you can't find what you want there, then what you want doesn't exist :P hehehe


http://evatco.com.au/ have a good range listed, too
They're in Qld. IIRC.
I like that Electronic Valve And Tube CO is OCTAVE backwards. :D

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KH Guitar Freak
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Re: All About Valves

Postby KH Guitar Freak » Tue Oct 06, 2009 12:50 pm

unearth wrote:Gonna chuck some 6L6 power valves in my randall rg50tc, whats a good brand?


If you have too much money, I recommend the Winged C 6L6s. They are great...

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M2k
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Re: All About Valves

Postby M2k » Sat Oct 17, 2009 8:52 pm

since u have too much money Jim,
why not get yourself the Mesa Duece Stilleto youve been gassing?
s_m_g wrote:Can someone translate this thread to guitar so I can understand what the hell you're all talking about?

I had Octoban once, it was kind of like calamari but a bit chewier.

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KH Guitar Freak
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Re: All About Valves

Postby KH Guitar Freak » Sun Oct 25, 2009 4:09 am

M2k wrote:since u have too much money Jim,
why not get yourself the Mesa Duece Stilleto youve been gassing?


I just did a fw\ew days ago... :lol:

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M2k
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Re: All About Valves

Postby M2k » Sun Oct 25, 2009 5:09 pm

good on ya :P
s_m_g wrote:Can someone translate this thread to guitar so I can understand what the hell you're all talking about?

I had Octoban once, it was kind of like calamari but a bit chewier.

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Re: All About Valves

Postby nickycon » Tue Oct 27, 2009 1:31 pm

Hey guys, ive got a pretty general question -

I play metalcore and im having trouble getting low end squealies.. is a valve amp - something high gain e.g. 6505 JCM800 gunna solve this problem? my friend reckons i need an overdrive pedal? im using a Line 6 Spider at the moment on the highest gain setting possible?

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M2k
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Boss CH-1 Super Chorus
Good Transactions
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Re: All About Valves

Postby M2k » Sun Nov 01, 2009 11:26 am

i just found out about this THD (i think thats the brand) Yellow jackets thing that converts your class A/B into a class A by cutting down the voltage to the tubes allowing u to place an EL84 into the yellow jacket, then plug the yellow jacket in where the 6L6 goes, it also cuts wattage down to a third of what it is
s_m_g wrote:Can someone translate this thread to guitar so I can understand what the hell you're all talking about?

I had Octoban once, it was kind of like calamari but a bit chewier.


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