New "Boat anchor" arrives from eBay, part 1 RAX-1 CG-46117 aircraft radio

!: New "Boat anchor" arrives from eBay, part 1 RAX-1 CG-46117 aircraft radio

EBay fresh new toy on the bench (er..table), WWII vintage aircraft general coverage shortwave radio. RAX-1 unit 3, CG-46117, tube type, covers 7 MHZ to 27 MHZ in 5 bands. It was built to run on 28 or 12 volts DC from the planes batteries. This one was missing the dynamotor and rear cover. Some of the wiring was hanging out and an "extra" PCB with a 0A2 on it was stuck in where the fuse and choke should be. It wasn't connected. Most of the wiring looked original. Some wires were cut that shouldn't have been. Looked like a failed conversion to 120 VAC (regular house plug). The normal old school 1950s conversion would be to pull the transformer out of some old tube TV or tube radio and transplant in. Not so easy to find nowadays. Everything is sold state now. Wrong voltages. I decided to use transformer types still available to electricians and connect them back to back. 120 VAC in , step down to 12 volts then step back up to 240 VAC. The 12 volts feed the tube's heaters and the 240 volts feed the tube's plates.

New "Boat anchor" arrives from eBay, part 1 RAX-1 CG-46117 aircraft radio

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Power Supply Units for Electronic Sets

!: Power Supply Units for Electronic Sets

Power Supply Units for Electronic SetsElectronic engineering is popular throughout the whole of the world. But to ensure a failure-free operation, one has to provide assembled electronic sets, blocks and modules with a stable power supply.Power supply units can help us with this task.When choosing the right unit, it is necessary to pay attention to such parameters as input and output voltage. Output strength of current is even more important as it shows the maximum capacity of the given power supply unit.Like all other electronic sets, power units can be supplied either as finished ready-to-use items or as electronic construction kits for independent assembly.Models pw0530k, pw1514, and pw12045 are supplied as ready-made solutions thus fulfilling the principle "buy-and-plug-in". They are switching power supplies of small sizes having minimum number of external passive binding elements. These models are connected to an alternating voltage from 85 to 264 V, and provide a stable fixed output voltage and maximum power.Pw0530k is a quite peculiar model as it is supplied in metal casing which provides additional impact resistance and protection from electromagnetic interference. The unit can be used individually or as a power supply element in electronics.BM037 model is a ready-assembled adjustable voltage stabilizer. You can connect a network step-down transformer to the supply unit. In this case you get a multi-purpose power supply unit which provides adjustable voltage ...

Power Supply Units for Electronic Sets

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DTE 345k Industrial and Commercial Wiring: Transformers

!: DTE 345k Industrial and Commercial Wiring: Transformers

A short introduction to a 3 phase step down transformer.

DTE 345k Industrial and Commercial Wiring: Transformers

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