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2N2219 and 2n3055 temperature is normali test circuit this way:1-turn current and voltage(30v) volume max2-connect ammeter and read 3.2A3-turn voltage volume to 30 to 8v connect ammeter and read 3.2A4-turn voltage volume to 7v connect ammeter and read 2.6A5-turn voltage volume to 3v connect ammeter and read 1.5Ayou think transformer voltage is low i test 28v and i get same result thank you

thank you for reply my circuit work fine only problem is current not constant. when current volume is max: 30v 3A (short circuit) when current volume ismax and voltage volume is 7v current :2A (short circuit)my transformer is 24v 3A please help me i dont have new component to create new version .

hi every one. i create the original version and work fine but i have 2.5A at 30v when turn voltage volume under 7v current get to 1,5 A and overload protection do not work please help me excuse me for poor english