. QST . 25 VIN34A ►I H I20 ui-^ 10u{-^ 2SV f:: 25V 11 keyR. 2AU7RECTIFIER-OSCILLATOR TO KEYED CIRCUIT F/g. / — Schematic diagram of the monitor. All resistors }^ watt. All capac-itors in ^^f. unless specifiedotherwise. The tube heaters get their power from the line between Ti and T2. SR — Low-current selenium rectifier (Federal 1002). Ts — Interstage audio transformer, secondary-to-Ti, T2 — ].2-amp. filament transformer primarv ratio 2:1 (Thordarson T-20A16). (UTC FT-2). October 1955 35 More Power with the AT-1 Simple Modifications for Greater OutputBY LEWIS G. McCOY, WI
. QST . 25 VIN34A ►I H I20 ui-^ 10u{-^ 2SV f:: 25V 11 keyR. 2AU7RECTIFIER-OSCILLATOR TO KEYED CIRCUIT F/g. / — Schematic diagram of the monitor. All resistors }^ watt. All capac-itors in ^^f. unless specifiedotherwise. The tube heaters get their power from the line between Ti and T2. SR — Low-current selenium rectifier (Federal 1002). Ts — Interstage audio transformer, secondary-to-Ti, T2 — ].2-amp. filament transformer primarv ratio 2:1 (Thordarson T-20A16). (UTC FT-2). October 1955 35 More Power with the AT-1 Simple Modifications for Greater OutputBY LEWIS G. McCOY, WIICP • By a few simple modifications, thepower output of the Heathkit AT-1 canbe raised tw«> to three times. Any Novicewho has huilt the rig and used it h>ngenough to become familiar with its op-eration should be ready for the slightlymore complicated circuit. This articlegives step-by-step directions. LISTENING to the Novice bands for a short timewill quickly convince anyone the Heathkit-* AT-1 transmitter is a very popular item. As itsta
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
