Show telegraph Tee graph key for radio transmission A h accompanying illustration show s it ago g 0 I 1 method of conN converting erting an erdl mry wiry tele aali or liht wireless key into a alz n lar heavy duty eastly op wireless ireless key hab has been aused on watts continually for some come time with satisfy tion this key Is not tiresome t operate as it N was as bea re it N as change i T n ake tl e kei ke first remove the lei ei pad file off both contacts to present more surface f r the dimes to rest up n file both sides of 0 the 11 me mes and then solder tl t em in their t places it leq a little perseverance to make them solder ell and evenly however it Is worth the tr ubie uble when the con a v facts have hane been soldered on properly t t 41 the extension arm Is put in position this consists of a piece of square metal about inch by IL inch by 2 inches which dimensions work best one can vary the length to suit in taste A piece of the aien anum sounder arm can be used for this part of the lever two holes are drilled in the piece one to fasten it on the lever ta e other for the knob one small bolt olt at 0 Is enough as there Is not strain at this point at 0 also Is fastened in ordinary ordin iry tele drapl ic iq key spring wound with larger diameter loops this makes the spring weaker and the action of 0 the key more resilient no way ay of adjusting the spring has been provided as one can stretch it until he gets the right tension and then leave it aliye un W arx ary t 1 V heavy duty key made from a te evgraph key der tl e knob Is a hard rubber or fiber disk about two inches in diameter on which to rest the fingers this key will handle heavy currents and by moving the spring from A to 0 and the addition of the arm it becomes easy to operate without making as many Mi stales es as before the whole I 1 ey should be mounted on a neat wooden base to prevent the arm from hitt ng the tible science and anven ion and radio news |