Epicurean
100+ Head-Fier
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Quote:
By mistake I wrote 30mV instead of 30mA. What I meant was that you should measure the Hfe WHILE the 30mA is flowing through the transistors. This is because the Hfe changes with temperature and current and the built-in Hfe in DMMs put very little current through the transistors.
| Originally Posted by hellomai /img/forum/go_quote.gif I thought you should match the Hfe for the output Q24/Q34, look here on note3. |
By mistake I wrote 30mV instead of 30mA. What I meant was that you should measure the Hfe WHILE the 30mA is flowing through the transistors. This is because the Hfe changes with temperature and current and the built-in Hfe in DMMs put very little current through the transistors.
