Please communicate in english.
Paraset radio power supply.
Paraset schematic from radio communication 1982 pdf on5lj s drawings.
Picture of the norweigean oluf reed olsen s set.
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.
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.
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.
For other radios separate forums can be set up ask the quartermaster.
Orange by musmus http musmus main jp.
And with a main power supply.
This 6l6 puts out about 7 8w with 58ma anode current.
Consisting of transformer rectifier tube 6x5gt and a capacitor.
Input to vibrator 2 2a.
There is also a nice all brass key connected to the rig out of the photo to the left.
It has 2 of the 12ba6 tubes for the regen radio and 2 of 12aq5 s for the little cw transmitter.
4a jpg hd 7a jpg hd 8a jpg hd the power supply is very compact in a great box.
I tested the power with a breadboard transmitter with nearly the same circuit as the paraset.
The paraset would have been our ideal radio.
Power supply for mk vii.
Paraset in norway.
The only real issue i had with these circuits was the linear regulator would not start with all three tubes.
With a 12v6 the output was nearly 4 5w 50ma and 1 8a from battery.
This forum is all about building and using world war ii spy radio equipment in particular the whaddon mk vii paraset.
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.
The switch is the 80 40 meter bandswitch.
With a test of the 12a6 the output was about 2 2w 40ma at battery current of 1 5a.
What organization used this radio in 1953.
Drawing from on5lj.
One of my ham radio buddies calls this the paraset mini cooper.
Blueprints from on6wj jos warnier.
The power supply delivers 6 vac and 350vdc.
It has no screenprint.
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.
The power supply is also tested september 15 1953 the power supply is very simple.
Some differences were made during the war.
The method to wiring this radio was done in stages.
Probably an early version.
12v 24ah battery is used.
