Hits
Spiral Top Loading of a Short Vertical
A spiral coil was constructed on a form composed of 69mm OD plastic drain-pipe and 15 plastic radials
post 30 Jan 2024
Projects_Homebrew Links →
30 Volt Computer Power Supply Stack
A bonus was that I discovered that these did not need a standby load connected to the supply to keep them running - just apply mains power and close the Start lead to ground
Amateur Radio Projects Vector Network Analyzere
This is a homebrew VNA capable of both transmission and reflection measurements from 0.05 to 60 MHz, with about 0.035 Hz frequency resolution and over 110 dB of dynamic range
A Portable Station for 30 MetresI decided on the 30 metre kit, because 30m has less static in the summer months than 40m
Antan un analyseur d'antennes compact
The best analysis of an antenna, for a correct adjustment, is done at its feed point, without passing through the cable or the power line
Frequency counter up to 12 GHz
Lab bench device that counts signals from below 500mhz to above 12 ghz
168
A bonus was that I discovered that these did not need a standby load connected to the supply to keep them running - just apply mains power and close the Start lead to ground
This is a homebrew VNA capable of both transmission and reflection measurements from 0.05 to 60 MHz, with about 0.035 Hz frequency resolution and over 110 dB of dynamic range
The best analysis of an antenna, for a correct adjustment, is done at its feed point, without passing through the cable or the power line
Lab bench device that counts signals from below 500mhz to above 12 ghz
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
Interface-for-digital-broadcasts-with-integrated-audio 4-port HUB, with a TUSB2046. With port 1 of the HUB we drive the FT232RL; with port 2 the PCM2904, furthermore, we decided to leave ports 3 and 4 free