I also appreciate the Wenzel circuit. Not seeing the other article, I might guess that maybe it offers suppression of the original 5 MHz signal as a benefit. It seems to be the equivalent of a digital XOR circuit with one lead delayed by 90 degrees. Regards Paul WB8TSL
On Wed, Nov 12, 2014 at 6:06 PM, Brian, WA1ZMS <wa1...@att.net> wrote: > Gentlemen- > > I have my paper copy in front of me with the original article. > I am not certain that I can just scan it and send it around due to > ARRL & Author copyright matters. But I am willing to scan it. > > With all due respect to John, K6IQL the author who spent much time > on his design......I would opine that an equivalent doubler could be > made from the Wenzel doubler circuits that are on the Wenzel web > page and from first-hand experience...I used such a 5-to-10 MHz doubler > for all of my amateur radio projects up through 403GHz. > > The K6IQL design, in brief, splits the 5MHz signal into two paths. > One passes to the LO port of a Double Balanced mixer, while the > second path goes through a 90-deg phase shift network and into the > RF port of that JMS-1MH mixer. The output is taken from the IF > port. The output is then buffered & filtered. He spent much design effort > on the 90-deg phase shift network to keep it all temp stable. > > Personally, I'm lazy and like the Wenzel "full wave rectifier" design with > a nice BPF on the output to obtain a clean 10MHz. > > -Brian, WA1ZMS/4 > > > -----Original Message----- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Oz-in-DFW > Sent: Wednesday, November 12, 2014 4:41 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Quad Driven Mixer 5 to 10 MHz Doubler Atricle > > Only a small subset of QEX articles on available in digital format. This > isn't one of them. We'll either need to get a copy from the author, or from > a QEX subscriber. > > On 11/12/2014 2:34 PM, Dave M wrote: > > I am able to download the files associated with the article, but not > > the article itself. Guess I need to be a paying member to get the > > article. The only files in the download are the XLS file for > > calculating the filter values, and the parts list. > > > > It's at http://www.arrl.org/qexfiles in the year 2011 listings, > > filename 3x11_Roos.zip titled "Converting a Vintage 5 MHz Frequency > > Standard to 10 MHz with a Low Spurious Frequency Doubler" > > > > Dave M > > > > John C. Roos via time-nuts wrote: > >> Several list members contacted me expressing interest in the article. > >> None of them were able to download much or anything from the ARRL QEX > >> web site. That includes me and other ARRL members. > >> I am working the issue with one call to ARRL so far today. I will > >> contact Larry Wolfgang at ARRL and see what Ican bust loose. So hang > >> in there. It is a cute technique, not originated by me, but useful. > >> Right now I have to get the ARRL FMT done first. > >> -73 john c roos k6iql > > > > > > _______________________________________________ > > 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. > > > -- > mailto:o...@ozindfw.net > Oz > POB 93167 > Southlake, TX 76092 (Near DFW Airport) > > > > _______________________________________________ > 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.