. Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to apply radio for his pleasure and profit without going into the special theories and the intricacies of the art . 4 inch are used to make connections with any desired partof the helix or inductance. A six-volt storage battery,vacuum tube socket, filament rheostat, and a\ I / telegraph key complete the outfit. A micro-\/a phone can be substituted for the key and theset converted into a s
. Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to apply radio for his pleasure and profit without going into the special theories and the intricacies of the art . 4 inch are used to make connections with any desired partof the helix or inductance. A six-volt storage battery,vacuum tube socket, filament rheostat, and a\ I / telegraph key complete the outfit. A micro-\/a phone can be substituted for the key and theset converted into a short-distance telephonetransmitter. If possible, a hot wire ammetershould also be includedwith the set. This instru-ment is placed in theground lead and serves to 8:=:. How two or three tubes may be arranged in parallel for obtaining greater power while still using the same simple arrange- G ment. In this case straight CW telegraph is obtained. 246 RADIO FOR EVERYBODY indicate when the transmitter is adjusted to maximumefficiency. Tuning the set is accompHshed in very much the samemanner as with the damped wave transmitter. With thefilament of the tuhe Hghted and the set oscillating properly,the series and the grid condensers are varied until a max-imum output is indicated by the ammeter. However,this method does not indicate just what the wave lengthmay be, and one may be overstepping the 200-meter may be well to have nearby amateurs listen in and saywhether the emitted wave appears to be below 200 meters,and also when the transmission is at its best. The output of the transmitter can be increased by usinga higher voltage on -the plate. By means of additionalB battery units, the voltage can be increased to 90 must be remembered in
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