#Baofeng 9100 is in chinese trial
IoT water tank telemetry project – HC-SR04 – first trial.Coil former made of cast acrylic sheet.IoT water tank telemetry project – GY-US42v2 – first trial.IoT water tank telemetry project – ultrasonic sensor.IoT water tank telemetry project – JSN-SR04T-3.0 – first trial.
#Baofeng 9100 is in chinese series
Pitfalls of series stub matching with coax.IoT water tank telemetry project – HC-SR04 – second trial.A template for an air filter foam element.CirroMazzoni Baby small transmitting loop – a desk study.Measure transmission line Zo – nanoVNA – PVC speaker twin – loss model derivation.IoT water tank telemetry project – HC-SR04 – third trial.Measure transmission line Zo – nanoVNA – PVC speaker twin – loss models comparison #3.Measuring a 1/4 wave balanced line – nanoVNA.IoT water tank telemetry project – 4-20mA / 1MPa pressure transducer trial.Small 2-stroke engines and popoff pressure.Review of inexpensive Chinese thermostat – DST1020.On testing coax cable loss with an analyser / VNA – part 1.On testing coax cable loss with an analyser / VNA – part 2.On testing coax cable loss with an analyser / VNA – part 3.On testing coax cable loss with an analyser / VNA – part 4.Do I ‘need’ a masthead preamp to work satellites on 2m? – space noise scenario.Do I ‘need’ a masthead preamp to work satellites on 2m? – terrestrial noise scenario.Measurement of one of those ham lore components – figure 8 twinline.QEX on SWR dependence on output impedance.QEX on SWR dependence on output impedance #2.Do I ‘need’ a masthead preamp to work satellites on 2m? – G/T vs G/Ta.The mulcher appears affected by Ethanol.On testing two wire line loss with an analyser / VNA – part 1.On testing two wire line loss with an analyser / VNA – part 2.On testing two wire line loss with an analyser / VNA – part 3.Estimating characteristics of a sample of coax from dimensions and properties.Gamma matches get blamed for a lot of stuff.Signal to noise degradation (SND) concept.Feasibility study – loop in ground for rx only on low HF – signal / noise degradation (SND).Feasibility study – loop in ground for rx only on low HF – signal / noise degradation (SND) – more detail.Yet another ferrite toroid calculator – but is it any good?.