Dr Bruce Griffiths wrote:
The design is probably a pair of low noise n channel JFETs
configured as a push push doubler.
Inputs driven in antiphase so that each FET conducts ffor
opposite 1/2 cycles with the 2 FET drains connected in parallel.
A bypassed trimpot connected between the FET
Christopher Hoover wrote:
Dr Bruce Griffiths wrote:
The design is probably a pair of low noise n channel JFETs
configured as a push push doubler.
Inputs driven in antiphase so that each FET conducts ffor
opposite 1/2 cycles with the 2 FET drains connected in parallel.
A bypassed
Christopher Hoover wrote:
Dr Bruce Griffiths wrote:
The design is probably a pair of low noise n channel JFETs
configured as a push push doubler.
Inputs driven in antiphase so that each FET conducts ffor
opposite 1/2 cycles with the 2 FET drains connected in parallel.
A bypassed
Of Christopher Hoover
Sent: 26 October 2006 07:14
To: time-nuts@febo.com
Subject: [time-nuts] 5 MHz Frequency Doubler
Hey 'nuts,
I'm looking for a good design for a 5 MHz frequency doubler.
The Wenzel Blue Tops HF doubler is said to be based on a low phase
noise, public-domain NIST design
:[EMAIL PROTECTED] On
Behalf Of Christopher Hoover
Sent: 26 October 2006 07:14
To: time-nuts@febo.com
Subject: [time-nuts] 5 MHz Frequency Doubler
Hey 'nuts,
I'm looking for a good design for a 5 MHz frequency doubler.
The Wenzel Blue Tops HF doubler is said to be based on a low
Christopher Hoover wrote:
Hey 'nuts,
I'm looking for a good design for a 5 MHz frequency doubler.
The Wenzel Blue Tops HF doubler is said to be based on a low phase
noise, public-domain NIST design:
http://www.bluetops.com/Modules/lnhd.htm
Hi Christopher:
You might have a look at Mini Circuits MK-3, see:
http://www.minicircuits.com/MK-3.pdf
My guess is that it contains a monolithic bridge diode circuit and a
couple of balun transformers.
Have Fun,
Brooke Clarke
w/Java http://www.PRC68.com
w/o Java
On Wed, 25 Oct 2006 23:13:55 -0700, Christopher Hoover
[EMAIL PROTECTED] wrote:
Hey 'nuts,
I'm looking for a good design for a 5 MHz frequency doubler.
The Wenzel Blue Tops HF doubler is said to be based on a low phase
noise, public-domain NIST design:
Hi Rex:
I think the 4 diode bridge circuit shown on the left of Fig 2 is the
Mini Circuits MK-3.
Note the fundamental and third harmonic suppression on the MK-3.
http://www.minicircuits.com/MK-3.pdf
Have Fun,
Brooke Clarke
w/Java http://www.PRC68.com
w/o Java
For what my 2 cents are worth.
I've used the Wenzel design diode based multiplier many times and have had very
good results with regards to close-in as well as far phase noise.
A simple schematic of my circuit application can be found at:
Hi Brian:
rtHz is Root Hertz. On the newer HP (Agilent) Spectrum Analyzers you
can display directly in rtHz, but there is no standard ASCII display
character for that so they use xx/Hz where xx is something like uV. So
although the display appears to be saying uV per Hertz it's really uV
Brooke Clarke [EMAIL PROTECTED] wrote:
rtHz is Root Hertz. On the newer HP (Agilent) Spectrum Analyzers you
can display directly in rtHz, but there is no standard ASCII display
character for that so they use xx/Hz where xx is something like uV.
Ahah! So that's why that funky old nixie
Hello Brian,
nice circuit.
Would you have phase noise info, and harmonic/ sub-harmonic measurements for
it?
Thanks,
Said
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-nuts@febo.com
Subject: Re: [time-nuts] 5 MHz Frequency Doubler
Hello Brian,
nice circuit.
Would you have phase noise info, and harmonic/ sub-harmonic measurements
for
it?
Thanks,
Said
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Hi Brian,
those numbers look quite impressive!
241GHz, that's almost Infrared :)
bye,
Said
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