I have used my elCheapo Tube curve tracer data to write a small program that will analyse tubes and suggest matched pairs. See the attached screen grabs.
The GUI shows 16 6CA7 tubes test result files with a corresponding tube no 1-16. By clicking on the Match button at the bottom the results are shown in colour according to the colour code:
Yellow shows tubes that match within some limit (set by the slider) based on the sum of the squares of the difference between the anode currents across the whole of the test range;
Blue shows tubes that match within some limit (set by the slider) based on the sum of the squares of the difference between the transconductance across the whole of the test range;
Green shows where both of the above conditions are met;
Red shows suggested pairs (based on a simple algorithm of selecting first the tubes that have the least number matching criteria then continuing with what is left over etc)
The GUI shows 16 6CA7 tubes test result files with a corresponding tube no 1-16. By clicking on the Match button at the bottom the results are shown in colour according to the colour code:
Yellow shows tubes that match within some limit (set by the slider) based on the sum of the squares of the difference between the anode currents across the whole of the test range;
Blue shows tubes that match within some limit (set by the slider) based on the sum of the squares of the difference between the transconductance across the whole of the test range;
Green shows where both of the above conditions are met;
Red shows suggested pairs (based on a simple algorithm of selecting first the tubes that have the least number matching criteria then continuing with what is left over etc)
