-------- Bob kb8tq writes: > > I have not given much thought to A11 yet, and I do find a certain > > elegance in the wien-bridge approach. It is worth noting that the > > actual heaters run of the unregulated supply, when I stabilized > > that, A11 worked less hard. > > The AC bridge approach certainly worked well 'back in the day'.
Actually, what I like is that it makes it possible to decide the frequency spectrum of the inevitable noise, and in this case put it up around a kilohertz where it is a lot less likely to cause trouble. The "modern" approach to that is to modulate or dither with a good long PRNG to whiten the noise, and while good in theory, it is not _that_ easy to get right in practice. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
