A little delayed, but here's a sweep to 500MHz: https://picasaweb.google.com/lh/photo/-wJRN8e2ugrxVVtMxqYI49MTjNZETYmyPJy0liipFm0?feat=directlink
1.2 dB loss at 10MHz. Something going on at 347MHz. If I get chance, I'll do a sweep to 1GHz. Orin, KJ7HQ. On Wed, Jun 20, 2012 at 4:17 PM, Thomas S. Knutsen <la3...@gmail.com> wrote: > Based on that PCB, I want to see an sweep to at least 1GHz. > The reason is that experience have shown that the inductance (perhaps 10nH) > in series with C2 and C6 would damage the stop-band rejection at UHF. > > Used with an OXCO this would not matter, but the desire to make the > ultimate filter is still there. > > Thomas. > > 2012/6/21 <li...@lazygranch.com> > > > If the output is buffered, there really shouldn't be a problem. > > > > Incidentally, I can crank out high order LCR filters all day just by > > transforming prototypes out of Zverev. But it has been my experience at > > even 10MHz the parasitics of the elements will throw off the design. > > > > > > -----Original Message----- > > From: Bob Camp <li...@rtty.us> > > Sender: time-nuts-boun...@febo.com > > Date: Wed, 20 Jun 2012 17:49:37 > > To: Discussion of precise time and frequency measurement< > > time-nuts@febo.com> > > Reply-To: Discussion of precise time and frequency measurement > > <time-nuts@febo.com> > > Subject: Re: [time-nuts] 10 MHz low pass filter > > > > Hi > > > > That's a pretty high order filter. The output of most OCXO's already has > a > > filter on it. Combining two filters (especially high order ones) without > > isolation between them is not a good idea. The resulting transfer > function > > will not be what you expect it to be…. > > > > Bob > > > > On Jun 20, 2012, at 4:54 PM, Joseph Gray wrote: > > > > > I came across this filter design recently and thought I'd build a few. > > > > > > http://www.jwmeng.com/AppNote/AppNote003.html > > > > > > I was about to place a Mouser order when I came across someone selling > > > filters, based on the above design. > > > > > > > http://www.ebay.com/itm/10-MHz-filter-kit-for-tcxo-gps-pll-/110893777470 > > > > > > The price with a board seemed low enough that I ordered a few. I'll > > > let everyone know how they work out. > > > > > > Joe Gray > > > W5JG > > > > > > _______________________________________________ > > > 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. > > > > > > -- > > Please avoid sending me Word or PowerPoint attachments. > See <http://www.gnu.org/philosophy/no-word-attachments.html> > PDF is an better alternative and there are always LaTeX! > _______________________________________________ > 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.