I thought about a DIY hifi, or maybe I could wire up a converter jack and plug them in my amp-- but I'm not sure that would work... and I only have one amp, and a whole lotta these tubes... Does anyone here want some?
Send me your ideas...
Sorry, I have a heap of them too, and no idea what to do with them.
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I think they are a medium mu twin triode, like maybe a 12AU7 etc.
Look it up on the NJ7P tube database site as an ECC88.
I think ECC88 equivalent 6N1P-EV
Type: Double Triode
Equivalent: 6DJ8, E88CC, 6922
like this, if interesting look here 6N1P-EV | 6DJ8 | ECC88 | 6922 | Double Triode Tube, there are some detailed description about this.
Interesting Information about Pentode, Double Triode, Nixie tubes and etc. Follow me on http://www.TWITTER.com/UssrTradeCom
those are fine tubes to build a cascode preamp stage
Are there any schematics floating around using these tubes ?
Here's some cool projects (but none strictly for guitar amps):
6DJ8 / ECC88 / Symmetrical SRPP Tube Preamplifier Schematic
HeadWize - Project: A Low-Voltage Class-A Tube Headphone Amplifier by Helmut Ahammer
HeadWize - Project: A DC-Coupled Tube Amplifier With Futterman Output Stage for Dynamic Headphones by Rudy van Stratum
I built a cascode front end with a 6dj8/ecc88 the other week- sounded great for dirty/midrangy sounds, never really cleaned up. I'd imagine a little different tone stack with less mids would have helped. I think the cascode sounded pretty awesome and I've recieved complements on other cascode builds in the past.
yeah that's what I thought , will it clean up especially with a humbuckers ?Code:sounded great for dirty/midrangy sounds, never really cleaned up.
My main guitar is a Les Paul.
So good for a crunch or lead channel but not for clean sounds .
I think it has to do with the very high transconductance 12,500 microohmos ( is this right ?) I always use mA/V ( 12,5)
I have used tubes with 6,1 ma/V (6,100 mho) ( 6aq8) and they cleaned up only barely and there was a more sudden breakup.
That's why the 12ax7 type of tube sounds so good because of the smooth transition into distortion imho.
Last edited by Alf; 10-22-2009 at 04:03 PM.
To me the reason for going with a cascode would be achieving a somewhat pentode like sound without using a pentode. You can set up the cascode for slightly less gain and use a tone stack that lends to a "cleaner" sound like a blackface fender or the like. If you have really hot pickups in your les paul I just don't know of any circuit that'll make it sound like a pretty sparkly strat into a blackface Fender.
Maybe you could just try a few circuits. I like the "midrange" control as used by gibson on some of their old amps. It's been revived on a few more modern amps as well. It yields bass or treble rollof at the extreme settings and a nice scooped mid sort of tone in the middle. It's worth trying that into a LTPI for a simple amp with two knobs. I know that sounds like a terrible idea but don't knock it until you've tried it!
I haven't tried it but I intend to shortly.
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