[time-nuts] Phase noise measurement (was - no subject)

Bob Camp lists at rtty.us
Sat Aug 21 16:29:23 UTC 2010


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, dk4xp at 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 at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> 



More information about the time-nuts mailing list