Paul, Thanks for the reply. I have been "out of the loop" so to speak for a while, so I did not know about your simulator. I'll look in the archives and retrieve the information. The story behind the 8170 and 2042 is I purchased them well in advance of LORAN (in NA at least) going silent, but only just now had the time to start testing them.
Thanks, Shaun M -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: July-22-11 8:39 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Spectrcom 8170 Reloaded Hi Shaun I may have missed a email or something. I think. You are using the 8170s 1 MC out to drive a loran commercial simulator that then drives the austron. Do I understand this correctly? I designed and built a few simple chips loran c sim about 1.5 years ago and shared that information on Time-nuts before loran C shut down for good. It takes in 100kc -5 mc etc and provides a loran c master station output. Numbers of austrons I have lock to it very quickly and resolve down to the austron limits, as long as the reference is good. Several of us with the 8170s have noticed the significant 1 mc output phase jumps due to the depth of modulation of the wwvb signal. (Thats my theory at least). Believe all of these vintage rcvrs suffers the same issue this includes the tracor 599 and hp117s (To a far lesser extent). I have discussed with another time-nut Paul about adding a limiter or at least gain ahead of the I detector in the 8170 also will need to build at least an equivalent delay for the q detector to keep it at 90 degrees. Simply over the last few weeks have not had time to do so. My interest is in lowering the jitter of these units. What I am doing will have no effect on the propagation effects. Regards Paul WB8TSL On Fri, Jul 22, 2011 at 12:34 AM, Shaun Merrigan <smerr...@compusmart.ab.ca>wrote: > Last step is to let the Austrons (2100R and 2100F) lock to the new "LORAN" > inputs thus: > > > > http://www.flickr.com/photos/acme-laboratories/5947818627/ > > > > and the 2100R: > > > > http://www.flickr.com/photos/acme-laboratories/5963265512/ > > > > > > Shaun M > > > > No Regret (Since 1996) > > > > _______________________________________________ > 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. _______________________________________________ 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.