. QST . Looking under thechassis of the W7JIP500-watt rig. Bias-supply components areat the left. The cop-per trough controls airflow and provides alow-inductance returnfor filament by-pass-ing. inch abu\ l i:il . ;.-is liii ceramic cone chassis is 11 by 17 bj 3 inches. Operation Neutralization of the amplifier is completelyconventional, following procedure used on lowerfrequencies. It was found simpler to neutralizethe rig when the lead from the high-voltage powersupply was disconnected completely. Otherwise,self-rectification takes place in the tubes whengrid drive is a
. QST . Looking under thechassis of the W7JIP500-watt rig. Bias-supply components areat the left. The cop-per trough controls airflow and provides alow-inductance returnfor filament by-pass-ing. inch abu\ l i:il . ;.-is liii ceramic cone chassis is 11 by 17 bj 3 inches. Operation Neutralization of the amplifier is completelyconventional, following procedure used on lowerfrequencies. It was found simpler to neutralizethe rig when the lead from the high-voltage powersupply was disconnected completely. Otherwise,self-rectification takes place in the tubes whengrid drive is applied, and plate current will flow- in the final due to the return path throughthe power supply. All the customary checks on neutralizing ap-ply. If the layout is symmetrical, the gap in theneutralizing capacitors will be the same. Gridcurrent dip, when the plate is tuned to resonance,will be one milliampere or less. With plate voltageapplied, plate and grid current will drop to zeroif drive is rem
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
