Hi A simple gain of 20 (26 db) amp using an OP-37 does a pretty good job in front of a spectrum analyzer. For a sound card you need more gain.
Bob On Aug 21, 2010, at 11:42 AM, dk...@arcor.de wrote: > >> Wenzel Audio Amp referred to in this email. Perfect! I drive with it a >> 3561A and a 7L5! Works for me. The only problem is getting any more >> 2SK369. >> Any recommendations? > > NXP BF862, available from digi-key. > > I have used it in a similar hookup with good success. Its virtue is the > low noise voltage AND low input capacitance at the same time. > You could deploy MANY of them in parallel until you get > into the capacitance range of a single Interfet device. > > One heroic effort for audio is here: > http://www.diy-audio-engineering.org/index.php?board=2.0 HPS5.1 > > I currently use 3 pairs of SSM2210 in front of a AD797. > > regards, Gerhard > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.