[time-nuts] Quad Driven Mixer 5 to 10 MHz Doubler Article
wa1zms at att.net
Wed Nov 12 18:06:52 EST 2014
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.
From: time-nuts [mailto:time-nuts-bounces at 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
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