Scott: You won't be able to use an off-the-shelf audio card, because they will have filters that cut off just above human hearing limits, somewhere in the mid 20 kHz range. I was referring to the data converter chips they use on those high end cards. The circuit for ~80 kHz (Nyquist) low pass filters and antenna interface would likely be a custom card.
For the guys talking about the Tayloe receivers, the Tayloe front end is just a down converter to get the HF or VHF signals down into the range that WWVB is already in. So to receive WWVB, you only need the backend of the Tayloe receiver, ie., no Tayloe mixer required. Just the (audio) data converter and the DSP. --- Graham / KE9H == On Wed, Aug 5, 2015 at 5:47 PM, Scott Newell <newell+timen...@n5tnl.com> wrote: > At 12:40 PM 8/5/2015, Graham / KE9H wrote: > >> Content-Transfer-Encoding: 8bit >> >> There are several high end audio Analog to Digital Data converters that >> will clock at 192 kHz, ~23 bits ENOB, which puts a 60 kHz signal sweetly >> in >> the first Nyquist zone. Typical NF of the front end of the data converter >> > > Any specific recommendations? I've seen the Asus Xonar U7 (USB) and Asus > Xonar D1 (PCI) mentioned on some of the SDR sites. (I'm running XP and > linux.) > > > -- > newell > > > _______________________________________________ > 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.