Spectrum analyzer Part IX High Voltage Supply

The workhorses of the spectrum analyzer the phase locked oscillators (PLO) need a control voltage greater than 20V. Scotty's controller pcb already has a switching converter section, but there were some problems  reported on the newsgroup. So Sam Wetterlin designed a new stand alone module for this purpose. It is a switching style design, but creates very little oscillator ripple at its input and output, and little radiation, though it still should be encased with a fence. 

Since I was lucky and got my hand on a pcb set which included also some Wetterlin pcbs I decided to use his design on my analyzer build.#

Soldering the module was pretty much easy and the module worked immeadetly.

#s

Sam Wetterlin's HV module

Links
HV Module Schema File
Pcb files
Sam Wetterlin Webpage


Spectrum analyzer Part I Controller board
Spectrum analyzer Part II Phase Detector
Spectrum analyzer Part III ADC 16
Spectrum analyzer Part IV Logarithmic Detector
Spectrum analyzer Part V Master Oscillator
Spectrum analyzer Part VI DDS 
Spectrum analyzer Part VII The Frame
Spectrum analyzer Part VIII The Mixer Modules 

Spectrum analyzer Part VIII The Mixer Modules

Friday morning the perfect time for a new Spectrum Analyzer build entry.

This time the four mixer modules are finished.
There is unfortunately not much to tell, except since one of them (Mixer 1)  is directly coupled to the input stage, shielding is important.

Mixer 1 is responsible for the input.
Mixer 2 is placed directly behind the cavity filter.
Mixer 3 is responsible for the tracking generator output.
Mixer 4 is needed for the Vna functionality.

Since I am building the full blown analyzer, I had to build all four of them.

Mixer 1 to 4 with brass shielding and matching lids

Links:
Spectrum analyzer Part I Controller board
Spectrum analyzer Part II Phase Detector
Spectrum analyzer Part III ADC 16
Spectrum analyzer Part IV Logarithmic Detector 
Spectrum analyzer Part V Master Oscillator
Spectrum analyzer Part VI DDS 
Spectrum analyzer Part VII The Frame