This site is owned by Rob McCance, N4GA.
I’m an amplifier enthusiast and have built many audio and RF amplifiers. I have a BSEE in Analog Design which is a near perfect fit for amplifier design.
I’ve built a lot more audio amplifiers and antennas than I have LDMOS RF amplifiers – which I did not start building until 2015.
There are many similarities between AF and RF amplifiers. Topologies (A, AB, etc.), bias schemes, feedback techniques, IMD and harmonic distortion considerations, on and on. However, the two diverge quite a bit in the output impedance transformation area.
In RF, you are dealing with transforming high power RF energy from typically 3 ohms at the LDMOS output to the ubiquitous 50 ohms at the amplifier output. This is where AF and RF amplifier design really diverge!
My goal is to gain a complete knowledge of HF RF Amplifier design.
Thus, this site!