[sdiy] SSM2017P

[mikko.a.helin at nokia.com]

> -----Original Message-----
> From: ext jh. [mailto:jhaible at t-online.de]
> Sent: 26. August 2001 20:37
> To: Seb Carr; synth diy
> Subject: Re: [sdiy] SSM2017P
> 
> 
> > does anyone here have any experience with the SSM2017P audo 
> preamplifier
> > chip? (claims to be a state of the art, 1 external resistor 
> job). I was
> > thinking of using one as a mic pre (or part of). Any thoughts?
> 
> It's a good, low noise preamp. I used it in the Frequency 
> Shifter and in the
> HiFli Clone. I think AD has cancelled the SSM2017P (surprised 
> ? not really,
> although this must have been the best selling SSM part of all times.)
> 

THAT Corp. makes a pin-compatible substitute for the SSM2017P, THAT1510,
see http://www.thatcorp.com/1510desc.shtml

Seems they've even bettered the specs.

For mic pre I would like to try this circuit:

http://sound.westhost.com/project66.htm

Transformer input mic pre may though be best for recording some instruments
(analog synths and vocals). Jensen-Transformers
(http://www.jensen-transformers.com/) must be the most popular brand.

-Mikko



> > Also, how much can i expect to pay for a reasonable audio isolation
> > transformer (to go between mic phantom power and mic pre, 
> as opposed to
> the
> > four zener diode solutions) ?
> 
> If you go for an input transformer (good decision !), you 
> don't really need
> a
> special chip like the 2017. I plan to build a little discrete 
> preamp some
> time.
> There are these Neve circuits, and the 30dB amp that is part 
> of the Urei
> 1176
> compressor (recently cloned) would make a good building block for
> a preamp, too. Transformer will also help to smooth things on overload
> (better than the 2017, I bet).
> 
> Speaking of transformers: Does anybody make a transformer with 10k
> output impedance, and with 600R *and* 10k input impedance ?
> I thought that should be the optimum for a combined Mic / Line input,
> but I haven't found one like this.
> 
> JH.
> 
>