vurlover.blogg.se - Minivna tiny

Note: This ratio is also the square of the reciprocal to the magnitude of the reflection coefficient. (B) The ratio in decibels of the power incident upon the discontinuity to the power reflected from the discontinuity. (1) (data transmission) (A) At a discontinuity in a transmission system the difference between the power incident upon the discontinuity. Lets just remind ourselves of the meaning of the term Return Loss. I was browsing a ham forum recently when I came across a Return Loss plot apparently from a ham grade miniVNA Tiny.

Some wooly thinking on Antenna Factor online.

Garden environmental telemetry project – part 3.

Digital directional wattmeter – based on G8GYW – part 2.

Another small efficient matching transformer for an EFHW – 2643251002 – #4 – G8GYW build and measurement.

An experimental propagation beacon on 144.385MHz.

An experimental propagation beacon on 144.385MHz – part 2.

A simple transformer model of the Guanella 1:4 balun.

A simple transformer model of the Guanella 1:4 balun – some further observations.

Garden environmental telemetry project – part 4.

Modelling an antenna as a simple two terminal resistance is often naive.

An improved simple Simsmith model for exploration of a common EFHW transformer designs (v1.03).

Another small efficient matching transformer for an EFHW – LO1238 – VK3PY, VK3TU build and measurement.

Another small efficient matching transformer for an EFHW – 2 x 5943000601 (FT82-43) – VK4JJ build and measurement.Another small efficient matching transformer for an EFHW – 2643251002 – #5 – improved Simsmith model (v1.03).Garden environmental telemetry project – part 5.Review of inexpensive Chinese thermostat – DST1000.Comparing RF Power Amplifier Tube Performance Computer and Calculate initial load line of valve RF amplifier on the AL811H.(tr)uSDX unauthorised product and countermeasures.tinyPFA – a set of Allan Deviation plots.tinyPFA – Trimble Thunderbolt GPSDO vs Leo Bodnar Precision GPSDO.tinyPFA – HP8656B vs Trimble Thunderbolt GPSDO.BG7TBL FA-3-6G frequency meter – initial impressions.nanoVNA-H – can firmware be updated if it has a broken USB socket?.Refurbishing aluminium antenna parts affected by weather / corrosion.Can a diode be used to rectify signals smaller than its ‘threshold’ voltage?.Pulse test of a Hantek 6204BD 4 channel 200MHz USB DSO and supplied probe.Re-engine of Deutscher 650 chipper shredder.Review of mower starter motor current using Owon HDS242S and Hantek CC-650.Programming a PIC 12F510 using the DIY-150 programmer.