Recommended Drive, Quick Guide for Common Transistors used in today's amps. My personal input12/3/2023 HG2879- Recommended voltage 14.5v, Recommended Peak input power per two transistors should be between 50 and 65 watts PEAK/PEP or swing from your radio. Deadkey from your radio should be between 1 and 3 watts for a Two transistor amp, 3-6 watts for a four transistor amp and so forth. You can expect 375-450 watts peak output on a two transistor amp.
HG2879C- This is the higher output design of the HG2879. These are not that similar to the standard HG2879 outside of name and being a high drive component. Voltage can be between 15v and 16.5v. Some will run even more in competition type scenarios. Recommended peak input per two transistors is 80-125 watts peak and 3-5 watts dead key or carrier input. Also note, these recommendations can be higher or lower depending on applied voltage. More voltage= less drive. You can expect 550-650 watts peak output on a two transistor amp with max drive. HG454- This is a medium drive transistor, max voltage 15v. Recommended drive is 35 watts peak, 1-3 watts carrier per two transistors in an amp. You can expect around 275-300 watts of peak output on a two transistor amp. HG2290/HG1446- I have grouped these two together because their characteristics are similar. Recommended voltage max 15v. The 2290 will typically do a little more power and draw a little more current. These are both lower drive transistors. I recommend 25-35 watts of peak input or swing into a two transistor amp, and a deadkey or carrier input of 1-2.5 watts. You can expect 200-300 watts peak output power on a two transistor amp that uses these transistors. The are very popular to use in driver sections of low drive amps that utilize the HG2879 or HG2879C in the final transistor section.
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