Paraset Radio Power Supply

Since it s small qrp power and size and operates on two of the current ham bands it seemed ideal for my glow bug project.

Paraset radio power supply. With a 12v6 the output was nearly 4 5w 50ma and 1 8a from battery. Power supply for mk vii. Please communicate in english. A search for more information soon revealed that the paraset was a small vacuum tube transmitter receiver unit built during wwii in the uk at the whaddon hall headquarters of the secret intelligence service communications unit.

4a jpg hd 7a jpg hd 8a jpg hd the power supply is very compact in a great box. Paraset in norway. The method to wiring this radio was done in stages. The only real issue i had with these circuits was the linear regulator would not start with all three tubes.

The paraset would have been our ideal radio. Some differences were made during the war. This 6l6 puts out about 7 8w with 58ma anode current. The power supply delivers 6 vac and 350vdc.

The switch is the 80 40 meter bandswitch. Paraset schematic from radio communication 1982 pdf on5lj s drawings. It has 2 of the 12ba6 tubes for the regen radio and 2 of 12aq5 s for the little cw transmitter. With a test of the 12a6 the output was about 2 2w 40ma at battery current of 1 5a.

Consisting of transformer rectifier tube 6x5gt and a capacitor. For other radios separate forums can be set up ask the quartermaster. And with a main power supply. Orange by musmus http musmus main jp.

The paraset is described in some detail in a book secret warfare adapted by david kahn who translated it from the original french book written by pierre lorrain. There is also a nice all brass key connected to the rig out of the photo to the left. I started with the power supply and voltage divider lower left of the photo i wanted to test the linear regulator for the 6 3v filaments as well. The power supply is also tested september 15 1953 the power supply is very simple.

I tested the power with a breadboard transmitter with nearly the same circuit as the paraset. It has no screenprint. Input to vibrator 2 2a. Probably an early version.

This forum is all about building and using world war ii spy radio equipment in particular the whaddon mk vii paraset. Blueprints from on6wj jos warnier. Drawing from on5lj. 12v 24ah battery is used.

One of my ham radio buddies calls this the paraset mini cooper. What organization used this radio in 1953. Picture of the norweigean oluf reed olsen s set. Background i first heard of a paraset when i saw a message on the qrp l reflector announcing an upcoming june 6th paraset d day activity.