On Wed, Feb 21, 2018 at 06:23 pm, LKNDAVE wrote:
i did the hokie pokie and this jpg came outBased on this design I built this attached circuit.
It controls voltage nicely. Really helps limit output power while working digital.
However the TIP 142 really generates some heat. I have a heat sink on it but it will need to be much larger. it is only drawing about .5 amp (1/2 amp) while transmitting.
Does that seem normal? it the heat something I should be concerned about? Or just provide a better heat sink and run it?
Thanks for the circuit idea and plan.