. QST . late and screen voltages from the idle multiplierstages. The multiplier stages are tuned simul-taneously with the VFO by ganging their tuningcapacitors (Cia — Cie) to the VFO frequencycontrol. Thus, the tuning controls are reducedto three, including the output coupling control. The 6AG7 amplifier-doubler doubles frequencyonly when working from the VFOCrystals in the region are used in thecrystal oscillator, although 160-meter crystalsmay be used if they are on hand. The 6AQ5doubler-tripler is shifted from 14 to 21 switching Ls in parallel with the
. QST . late and screen voltages from the idle multiplierstages. The multiplier stages are tuned simul-taneously with the VFO by ganging their tuningcapacitors (Cia — Cie) to the VFO frequencycontrol. Thus, the tuning controls are reducedto three, including the output coupling control. The 6AG7 amplifier-doubler doubles frequencyonly when working from the VFOCrystals in the region are used in thecrystal oscillator, although 160-meter crystalsmay be used if they are on hand. The 6AQ5doubler-tripler is shifted from 14 to 21 switching Ls in parallel with the , Li, thus reducing the effective in-ductance for the higher-frequency band. C2, Ce, Cg, Cio, Cn, and the adjustable slugsin the multiplier plate inductors provide con-venience in adjusting the tracking of the mul-tiplier circuits. C^, C9 and Cn are included sothat the circuit capacitances will remain thesame whether a multiplier stage is working intothe final amplifier or into the following multiplier. September 1955 37
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
