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Korg Triode for Guitar Preamp
Korg Triode for Guitar Preamp
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Old 11th December 2017, 09:25 PM   #11
djgibson51 is offline djgibson51  New Zealand
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Maybe a tube preamp for acoustic can be set up to add 2H, but no clipping.
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Old 11th December 2017, 09:55 PM   #12
2 picoDumbs is offline 2 picoDumbs  Australia
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I answered your question a while back.
It just depends on whether his current amp has enough gain (which is almost certainly yes).

You don't need to over think this.
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Old 12th December 2017, 12:38 AM   #13
Gnobuddy is online now Gnobuddy  Canada
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Quote:
Originally Posted by djgibson51 View Post
Maybe a tube preamp for acoustic can be set up to add 2H, but no clipping.
It definitely can, but the thing is, the reason we usually want that extra 2nd harmonic distortion is to "sweeten" the ugly sounds that come out of a solid-body guitar pickup.

A lot of that ugliness is created by the magnetic pickup itself - the magnetic field around the pickup pole-pieces is not uniform, and the guitar string moving through this causes a heavily distorted signal to be generated in the guitar pickup.

A good acoustic guitar (or acoustic-electric) usually has a completely different type of pickup - either a piezo strip under the saddle, or a little microphone inside the guitar body, or both. These types of pickups don't produce the same harsh distortion that the conventional magnetic pickup does. In addition, the guitar body itself is designed to produce a pleasing sound via its wood and cavity resonances.

So IMO a decent acoustic-electric guitar sounds good if you just plug it into any generic low-distortion amplifier with a flat and wide-enough frequency response. Theres no real need for the amp to add "sweetening", the sound is already sweet!

As usual, this is just my opinion, based on just my ears and my brain. Others may or may not agree.

Worth mentioning: I have one guitar (a Takamine) that uses an actual valve (triode) in the built-in preamp. Takamine calls this design their "Cool Tube" preamp, and their stated intention was to remove some of that harsh "piezo quack" that you often read about in reviews of acoustic-electric guitars. So someone at Takamine did think that a wee bit of valve distortion could help improve the sound of an acoustic guitar...

Does it work? I don't know whether the valve is actually responsible, but that particular guitar does have a rather natural plugged-in sound (i.e. it sounds a lot like it does when unplugged).

I bought that guitar for an entirely different reason: it has steel strings but they are almost as widely spaced as a traditional classical nylon-string guitar. I have big fingers, and it's the only guitar I have that gives me enough room for fingerstyle playing.

-Gnobuddy
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Old 12th December 2017, 07:04 AM   #14
DQ828 is offline DQ828  Australia
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All sounds great to me, now I just need someone to do a GB on PCB for the Korg Triode
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Old 12th December 2017, 07:21 AM   #15
Kay Pirinha is offline Kay Pirinha  Germany
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I personally have had very good experience with a Silverface (CBS) Fender Twin Reverb as an amplifier for acoustic instruments. It is clean and very (!) loud. So I'd recommend something like that: 1st 7025 triode - Fender tone stack - 2nd 7025 triode etc.
Best regards!
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Old 13th December 2017, 07:53 PM   #16
DQ828 is offline DQ828  Australia
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I am aiming at a preamp
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Old 13th December 2017, 08:43 PM   #17
Kay Pirinha is offline Kay Pirinha  Germany
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Ok. Omit that »etc.«

Best regards!
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Old 13th December 2017, 08:44 PM   #18
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by DQ828 View Post
All sounds great to me, now I just need someone to do a GB on PCB for the Korg Triode
Good chance this might become available in diyaudio store.
Ask Variac.
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Old 14th December 2017, 08:06 AM   #19
jazbo8 is offline jazbo8
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Korg Triode for Guitar Preamp
If you don't want to wait, you can get the buffer PCB from Pete Millett: DIY PCB plus Tube - Buffer PCB using the Korg Nutube 6P1 | eBay
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Old 14th December 2017, 08:15 AM   #20
DQ828 is offline DQ828  Australia
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Originally Posted by jazbo8 View Post
If you don't want to wait, you can get the buffer PCB from Pete Millett: DIY PCB plus Tube - Buffer PCB using the Korg Nutube 6P1 | eBay
Thanks, waitings not a big problem I have SO many things to get finished, just agreed to a barter with a lady from work, she gives me a new high quality matteress (which I need) and I build her a simple work table and chair from her bedframe which I dont need!
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