Hi all, I can suggest a different solution I have tested to have some important improvement. First, the lower phase shift sensitivity with the use of a low pass filter in conjunction with two notch filters instead the high Q band pass filter, second the unity gain to avoid a 13/20 dB amplifier to restore the original power level. You can find in the link all the test we have done. http://www.timeok.it/files/high_performance_frequency_doublerv13.pdf I hope this can hep. Luciano www.timeok.it On Thu 13/11/14 10:15 AM , Bert Kehren via time-nuts <time-nuts@febo.com> wrote: > We are using Wenzel with two filters see attached if it will pass. 20 Mhz > is down more than 60 db and 5 MHz 55. Distribution Amp takes care of the > rest. > Bert Kehren > > In a message dated 11/12/2014 8:13:33 P.M. Eastern Standard Time, > dgminala@mediacombb.net writes: > > Just a few days ago, I ordered parts to build a couple of the Wenzel > 2-diode > doublers, described in the same article as your full-wave diode doubler, > just in time to discover them on Ebay (via slow boat from China), item# > 171511157159. I inspected the components and layout in the picture in the > listing, and it certainly looks like the Wenzel FWB doubler. At $9.99 > USD, > the price is cheap enough, especially since you get SMA connectors on both > ends. Might have to do a bit of solder work on the SMA connectors if you > want to put it into a little box. > The listing on the doubler on Ebay says that the low end is 10MHz, but > I'll > bet that it will get down to 5MHz quite easily If there's any trouble > handling a 5MHz input, you could easily use a lower frequency ferrite for > the balun and make it work. > As you suggest, a BPF on the output and maybe a bit of amplification to > get > the level up to a usable level should get you a fairly clean 10 MHz. > > Dave M > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [1] > 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 [2] > and follow the instructions there. > > > > Links: > ------ > [1] > http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma > ilman/listinfo/time-nuts[2] > http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma > ilman/listinfo/time-nuts > Message sent via Atmail Open - http://atmail.org/

Luciano, This looks very nice. However, the inductors are custom made. It would be nice to have a off the shelf parts solution so it can be made easily. Any ideas ? -George, N2FGX On 11/13/2014 08:39 AM, timeok@timeok.it wrote: > Hi all, > > I can suggest a different solution I have tested to have some important improvement. First, the lower phase shift sensitivity with the use of a low pass filter in conjunction with two notch filters instead the high Q band pass filter, second the unity gain to avoid a 13/20 dB amplifier to restore the original power level. You can find in the link all the test we have done. > > http://www.timeok.it/files/high_performance_frequency_doublerv13.pdf > > I hope this can hep. > > Luciano > www.timeok.it > > > > > On Thu 13/11/14 10:15 AM , Bert Kehren via time-nuts <time-nuts@febo.com> wrote: > >> We are using Wenzel with two filters see attached if it will pass. 20 Mhz >> is down more than 60 db and 5 MHz 55. Distribution Amp takes care of the >> rest. >> Bert Kehren >> >> In a message dated 11/12/2014 8:13:33 P.M. Eastern Standard Time, >> dgminala@mediacombb.net writes: >> >> Just a few days ago, I ordered parts to build a couple of the Wenzel >> 2-diode >> doublers, described in the same article as your full-wave diode doubler, >> just in time to discover them on Ebay (via slow boat from China), item# >> 171511157159. I inspected the components and layout in the picture in the >> listing, and it certainly looks like the Wenzel FWB doubler. At $9.99 >> USD, >> the price is cheap enough, especially since you get SMA connectors on both >> ends. Might have to do a bit of solder work on the SMA connectors if you >> want to put it into a little box. >> The listing on the doubler on Ebay says that the low end is 10MHz, but >> I'll >> bet that it will get down to 5MHz quite easily If there's any trouble >> handling a 5MHz input, you could easily use a lower frequency ferrite for >> the balun and make it work. >> As you suggest, a BPF on the output and maybe a bit of amplification to >> get >> the level up to a usable level should get you a fairly clean 10 MHz. >> >> Dave M >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [1] >> 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 [2] >> and follow the instructions there. >> >> >> >> Links: >> ------ >> [1] >> http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma >> ilman/listinfo/time-nuts[2] >> http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma >> ilman/listinfo/time-nuts >> > Message sent via Atmail Open - http://atmail.org/ > _______________________________________________ > 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.