Online Radio

Ohmmeter 15 7
Ohms Law 4 1
Open/Short-circuit Transmission Lines 38 9
Operating Angles of Amplifier 26 2
Oscillation 27 1
Oscilloscope - How it Works 39 4
Oscilloscope Patterns 29 6&7
Overdriving an Amplifier 36 5&6
Overtone Oscillator 27 13
Overtones 27 13
Packet Radio 40 4
PACTOR Mode 40 3
Parallel Circuit: Total R when all R the same 6 6
Parallel Circuit: Total T when only 2 branches 6 6
Parallel Circuits 6 1
Parasitic Beam Antenna 37 8
Parasitic Oscillation 36 4
Parasitic Stopper 36 5
Parity Check 40 3
Passband 29 10
Peak and RMS (Root Mean Square) 10 3
Peak Envelope Power Test 39 2
Peak Inverse Voltage PIV 20 1
Pentodes 21 9
Period/Frequency 10 4
Permittivity/Dielectric Constant 11 6
Phase Detector 4 Supp. 27
Phase Locked Loop PLL 27 17 & Supp. 27
Phase Shift Keying, 31 Baud 40 8
Phase-Locked Loop Demodulators 34 13
Physical Length v. Electrical Length (Antenna) 37 4
Pi-coupler Network 36 5
Pierce Crystal Oscillator 27 15
Piezoelectric Effect 17 5
Pinch Off 25 7
PLL Demodulators 34 13
PLL Phase Locked Loop 27 17 & Supp. 27
PN Junctions 24 4
Point Contact Diode 24 14
Polarisation 16 4
Polarisation 23 6
Power Formulae 4 5
Power in a Series Circuit 5 3
Power Line Interference 33 3
Pre-emphasis 34 8
Pre-emphasis - How it Works 34 9
Primary/Voltaic Cells 16 2
Product Detector 29 10
Product Over Sum 6 6
Programmable Frequency Divider 5 Supp. 27
Protected Gate Mosfet 25 9
PSK 31 40 8
Push-Pull Amplifiers 26 7