2.5 Ohm Resistor Stablizes Q5 Final...
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Noting D882's emitter is tied directly to ground, I thought it might ease Q5's burden to add a small power sharing/stabilizing resistor in the emitter leg. ? I cut the emitter lead short and wrapped it up along the transistor body (print side) allowing insertion of a?2.5 ohm,?1/2 w, 5% resistor between emitter and ground.?
Now, as long as the VSWR is good, I can transmit a steady 3 watt signal while adjusting the tuner. There is less heating?at D882's collector because there's a small aluminium heat sink, but also, the small emitter resistor shares?some of the?power dissipation.
? ?...now to make my first contact. .. _
? ? Jim - AB1BR
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