SPECTRUM ANALYZER & TRACKING GENERATOR  (continued)       

Design by W7ZOI and K7TAU

as built by VE3JC, using KANGA US kit

 

satg17.jpg (20670 bytes)

 Homebrew  calibrator - built manhattan style

satg16.jpg (26650 bytes)

  

Testing the calibrator -

There's something rather fun about setting out deliberately to generate high harmonic content!

MVC-898S.JPG (32698 bytes)

 This is "early experimental" Spectrum Analyzer output of the calibrator circuit  (without the 300kHz resolution bandwidth filter installed in the SA, and without all lids on, etc.)  Calibrator crystal was 10.2 MHz  so second spike from left (tallest) is 10.2 Mhz and very small spike at far right is 71.4 MHz.  

SA AA1.jpg (76631 bytes)

 Almost complete Spectrum Analyzer / Tracking Generator

SA AA2.jpg (53142 bytes)

 With lids installed.  A roll of 36 guage soft copper foil, purchased at a hobby shop,  found a couple of uses in this project.  The band around the middle of the Analyzer covers the junction where the top and bottom halves were soldered to the Centre Plate, after all "inside" seams and brass nuts were soldered.   Large ten-turn knob is for tuning.

satg RV.jpg (22617 bytes)

 Rear view of the SA/TG, showing the exterior of the feedthrough capacitors.  A lexan sheet will be mounted over the rear, to prevent accidental shorting or damage to the wiring.  I used RG 174 for all dc and control wiring just because I had lots.  All dc and control wiring is on the back, or in the channel at the bottom front of the SA/TG. The time base generator compartment is used as a highway between these, since shielding of that compartment is not critical.