Paraset Power Supply

The rubber bands who kept the chassie in the holder had vanished.

Paraset power supply.

A test with a 15w 230v lamp. The voltage parameters measured on the receiver section are shown below. With new rubberbands it s fit for fight. The power supply is also tested september 15 1953 the power supply is very simple.

Power supply for mk vii this forum is all about building and using world war ii spy radio equipment in particular the whaddon mk vii paraset. It is built on a small bread pan i use these to sort small. The b power supply uses the standard full wave center tapped configuration. This power supply is also used with other projects as a utility power supplly.

This one was very noisy so i opened it. Consisting of transformer rectifier tube 6x5gt and a capacitor. The arrows show in which direction the anker swings. These can be scaled up or down if your b is significantly different.

A series dropping resistor drops the output of the supply to 250v. For other radios separate forums can be set up ask the quartermaster. It s not easy to find vibrators today. This is the power supply i use with the paraset replica.

It has 2 of the 12ba6 tubes for the regen radio and 2 of 12aq5 s for the little cw transmitter. The output is smoothed by a pair of filter capacitors and a filter choke. A 5y3 gt or a pair of 1n1007 silicon diodes if desired is used as the full wave rectifier. The power supply delivers 6 vac and 350vdc.

The transmitter has the paraset style parallel series tuned tank circuit and seems to load well even with a random length wire antenna. I decided to use 12v to my paraset.