Here are a few pictures of my construction projects
They slill require the finishing touches
The Heart of the PSU is two tetrodes PCB's designed by G3SEK.. These provide over current and glitch protection required in the PSU. The Universal Tetrode supply is used for both my 6m 4CX1500B and 2m 4CX250B RF amps. The EHT transformer can be switched to provide 2800V or 3500V DC at 1A depending on the valves used. The Screen supply runs at 350V and the Grid supply at -60V.
The 2m RF deck uses two 4CX250B ceramic tetrodes. Detailed drawings for construction can be found at the website of LA0BY
The 6m RF deck uses one 4CX1500B ceramic tetrode. Detailed drawings for construction can be found in the 2002 ARRL Handbook which uses the 4CX1600B
The 70cm RF deck uses Two GI7B triodes. Detailed drawings for construction can be found at the website of YU1AW.The Triode power supply transformer weighs in at 32KG and has tappings at 2KV 2.5KV and 2.8KV and can supply 2A at these Voltages.The 70cm amp and PSU are still under construction.
