开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

Re: Output vs. frequency behavior QCX 30m


 

Steve K1RF,

How critical is the resonant circuit C30 and L4 for single band performance? ?Are we looking at a broad bell shaped curve response or a sharp peak? ?I think I read somewhere Hans picked the values by experiment because of the "floating" capacitance from the FETS etc. ?Maybe a mica capacitor would be in order for C30 if the original were heating up.

Bill N7EU

Join [email protected] to automatically receive all group messages.