PDF DOWNLOAD: Chapter 11
Building a VFO for the higher bands (PMOs)
- Old approaches that no longer work
Frequency multiplication
High frequency oscillators
- Pre-Mix Oscillator method of frequency translation
- A VFO-controlled QRP module
- Crystal oscillators are stable, aren’t they?
Crystal oscillator circuits
Butler oscillators and big crystals
- Mixers, bipolar transistor and dual-gate MOSFET
Optimum drive requirements
Direction of tuning, drift error cancellation
- Multistage filters and filter/amplifiers
- The QRP final amplifier stages
- Spot switches for PMO QRPs6