Looking for some advice on transistor hfe of bipolar juction transistors. I have some TIP36C transistors and wanted to pair two as a darlington pair. The application would be as a linear voltage regulator pass transistor. I have built circuits with a single darlington package in the past, that worked well. My uncertainty is the maximum hfe of a paired TIP36C transistors. Typically possible oscillation of such an arrangement. I know there is a forward voltage drop larger than a single transistor. But the hfe of the TIP36C is 10 25 and maximum 50 hfe, I'm looking to minimise voltage drop under load for a single boost transistor circuit, using the two TIP36C transistors. Input voltage would be around 18 to 22 volts from the rectified and filtered input voltage. Would it be viable to pair two TIP36C transistors. Any thoughts appreciated. My maximum final output voltage would be 12 to 13.8 Volts. Thanks for reading.