[time-nuts] Quad Driven Mixer 5 to 10 MHz Doubler Article

timeok at timeok.it timeok at timeok.it
Thu Nov 13 08:39:09 EST 2014


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 at 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 at 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
> 
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