Re: RE : Re: Replacement output stage

If I remember correctly, the (stock) K5 is a bit noisy.  When you replace the resistors the overall output goes up but the noise dB remains the same, so the signal-to-noise ratio goes up and sound sounds less noisy.

Jeff


----- Original Message ----
From: Antoine Deschênes <antdes45-FFYn/[email protected]>
To: [email protected]
Sent: Friday, December 15, 2006 8:26:11 AM
Subject: RE : [k5synth] Re: Replacement output stage









  


    
            Yes, I saw them, but you get a lot of new problems

with the headphones output, it's still as noisy as

before, but there's a sudden gain boost when you rise

the volume which seems to clip the LM386 amplifier.



Maybe it's just a matter of filtering the power going

to the output chips, because the line outputs used

with a separate hedphones amp produces much less noise

than using the headphones output. 



Now that I see that someone is interested, I'll start

to look for possible upgrades.



Antoine



--- caladann <caladann@yahoo. com> a écrit :



> I am very interested!! I saw some plans on the web

> to boost the 

> output level by replacing some resistors, I dont

> know if you have 

> seen them...

> Something must be done to bring this synth to its

> full potential!

> 

> --- In k5synth@yahoogroups .com, "antdes45"

> <antdes45@.. .> wrote:

> >

> > Any features you'd like to have? Is anyone

> interested? 

> > 

> > I think I found a solution to have some external

> controls which

> > wouldn't require modifications of the synth case

> itself. I'll get 

> into

> > details as I'm not 100% sure it would be

> convenient.

> > 

> > --- In k5synth@yahoogroups .com, Antoine Deschênes

> <antdes45@> 

> wrote:

> > >

> > > Hi everyone,

> > > 

> > > I told a while ago that I would make (or at

> least try to make) a 

> new 

> > > output stage for the K5 (To have less background

> noise) so I 

> think it 

> > > should be time to start making some schematics

> and try them! ;)

> > > 

> > > The biggest problem I think I'll have is with

> the power supply. 

> It only 

> > > provides +6V DC to the opamps, and to get the

> best sound as 

> possible, a 

> > > new voltage would be requiered.

> > > 

> > > I'll try to keep the current potentiometer

> working, and maybe 

> add an 

> > > option to bypass it so it could, as an example,

> have a fixed-

> volume MIX 

> > > and 1 to 4, but the volume control still working

> for the 

> headphones, or 

> > > something like that.

> > > 

> > > I think I should make it as flexible as possible

> by using 

> jumpers. (But 

> > > I will not provide any external switches, that's

> up to you, I 

> will

> > never 

> > > drill an hole in the synth.)

> > > 

> > > Any suggestions?

> > > 

> > > Cheers,

> > > Antoine

> > >

> >

> 

> 

> 

> 

>  

> Yahoo! Groups Links

> 

> 

> 

> 

> 



Antoine Deschênes



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