Re: Ref:Hilltopper 20 Manual, J5 and J6 headers
Charles W. Powell
Eric,toggle quoted messageShow quoted text
J5 is for programming the ATmega328 and for I/O if you add the CAT control code, and J6 is for display, if you care to add it. I can send you the info privately, off list if you want it. There are several versions of the firmware around; I adapted it for my own use with some minor cosmetic changes. (I’m not much of a coder - I just do a few doodles here and there.)
Great little radio. I just built my second HT-20 and it puts out just shy of 7 watts! With the audio mods, there is more than enough volume generally with the gain pot about half-way up. I may change the sidetone resistor - again. I still find the sidetone to be a bit loud for my taste.
Chas - NK8O