[sdiy] making pultec and neve-esque type stuff

[harrybissell]

Hmmm... close

I'd say "If you want to know how something works, buy it and then take it apart and
figure out how it works"   :^P

I tried real hard to make a phase shifter...  Even found the schematic in a college
engineering
textbook (the classic op-amp section, lead or lag, your choice)... but all it would do is
make
bizarre vibrato 'whoops'.   So I bought an MXR Phase 90...and traced the schematic...
found
out I needed to mix the phase shift out with the original signal...  Close, no cigar.
Also learned
how to use FETs to tune the stages... biasing said FETs etc...

Buy it (well, borrow or steal will work as well I suppose....) then HACK IT OPEN !!!

H^) harry

synth at charlielamm.com wrote:

> I agree.  It's not easy/cheap to make inductor-based, high performance
> stuff, even if it looks like there isn't much under the hood.
>
> However, if you want to know how something works, building/troubleshooting
> something is more educational than buying it.  As they say in "Animal
> House": "knowledge is good".
>
> http://www.americanproaudio.net/LA2/index.html
>
> On Mon, 7 Apr 2003, Tim Curtis wrote:
>
> > Before beginning a project such as the 1272 clone, remember that it has
> > limited functionality in most applications.  The 1272 was never intended
> > for use as a Mic Pre - it lacks the gain of a true Neve Mic Preamp.
> >
> > Also, the problem with replicating anything like this is the
> > transformers.  They are quite expensive and you need both input and
> > output trannies.  Most "classic" circuits share this trait.
> >
> > Also, in the Neve line, the EQs of their classic Channel Amps were all
> > inductor based.  Unless you're using the exact same inductor, it's not
> > going to sound the same.  Might sound okay, but won't sound like a Neve.
> >
> > Not easy for a beginner.  I'd recommend just buying one of the
> > commercial models.
> >
> > Tim
> >
> >
> >
> > BrightBoy wrote:
> >
> > >>any linkjs or sources for DIY'ing that sort of stuff would be great and any ideas
> > >>or info to help out a beginner would be even better
> > >>
> > >>
> > >
> > >Point your browser here for a great starting point:
> > >
> > >http://recording.org/users/kev/
> > >
> > >Here's a great looking Neve 1272-esque DIY kit:
> > >
> > >http://www.seventhcirclestudios.com/SCA/SCA.htm
> > >
> > >Some good looking (possible redundant) links here:
> > >
> > >http://www.vintagedesign.halmstad.net/reseach.htm
> > >
> > >Cheers,
> > >
> > >Jeff
> > >
> > >
> > >
> > >
> >
> >