1rst spectrum

[ChrisRadium2023]

Hello guys,
here is my first spectrum that looks like a spectrum!

My high voltage from amazon with an simple RC filter works fine (a few mV ripple but will be improved later).

The new proper sound card (@48kHz so far but will be changed for a 192kHz soon) was the key of the technical problems....

There is still loads of things to improve but its a start...

I forgot to mention an important detail : there is NO preamp or other electronics other that just a primitiv crude shaper made of a CR-RC filter in series.

Ps : i'm not sure yet about the peaks values but I will try to get some calibration check source at work.

ThereminoMCA_2023_02_04_01_28_47 1ers spectres.jpg

There are still some linearity issues to deal with but its working (so it seems ).

The weird thing is that I have to add a 10M at the output of the HV if I want the results to be linear...

à suivre
Chris.

[ChrisRadium2023]

I've just done the Uraninite spectrum to check if it worked too....

ThereminoMCA_2023_02_04_02_08_40 URANIUM.jpg

chris.