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

paul swed paulswedb at gmail.com
Wed Nov 12 20:20:36 EST 2014

Looked it up and pretty amazing. Can't really say how well the ferrite will
go down to 5. It should.

On Wed, Nov 12, 2014 at 7:22 PM, Dave M <dgminala at mediacombb.net> wrote:

> 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
> Brian, WA1ZMS 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
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