Friday, 28 May 2010

K1 build.



40m Pre-Mix Oscillator Signal Spectrum and Plot
Pin 4 J6 Filter board



20m Pre-Mix Oscillator Signal Spectrum and Plot
Pin 4 J6 Filter board

Adjust the pre-mix filter using an oscilloscope and pin 6 on J6 filter board.
(nice thing is same pin both bands) You realy need 4 hands to video this so apologies poor video.
video

A signal at last!
video

2 comments:

Eric Söderman said...

What kind of oscilloscope are you using?

M1KTA said...

Cheap PC usb based dual channel Velleman PCUS1000.

Works well enough and is a digital storage scope, included a couple x10 probes and also contains a 25MHz spectrum analyser.