. QST . 4 inches, , J2 — Coaxial connectors, chassis — 8-contact connector, chassis-mounting (octal).J4 —6-contact connector, chassis-mounting (Jones). ator. Capacitances below ni. are in tint, fixed capac-32 watt unless otherwise — relay, 117-volt coil (Advance type AM/2C/115VA).Si — Rotary switch, 2 poles, 3 •— toggle. Ti — Modulation transformer, 10,000 ohms to 3000,5000, or 8000 ohms (Triad type M-3X).* These values for a surplus meter taken from indicator of ARC-5 equipment. Values should beadjusted t
. QST . 4 inches, , J2 — Coaxial connectors, chassis — 8-contact connector, chassis-mounting (octal).J4 —6-contact connector, chassis-mounting (Jones). ator. Capacitances below ni. are in tint, fixed capac-32 watt unless otherwise — relay, 117-volt coil (Advance type AM/2C/115VA).Si — Rotary switch, 2 poles, 3 •— toggle. Ti — Modulation transformer, 10,000 ohms to 3000,5000, or 8000 ohms (Triad type M-3X).* These values for a surplus meter taken from indicator of ARC-5 equipment. Values should beadjusted to fit when other types of meters are used. Note: Connections indicated by A-F and A -F in-clusive go to corresponding letters on meter switch (inpower-supply unit) through a 12-wire cable. Plug-and-socket wiring for the meter cable is omitted from thesediagrams for simplification. 24 QST for. Fia 2 - Crystal-controlled 28-iMc. convener. The ^f. capacitor, aredisk ceramic; others may be either mica or ceramic. Capacitances below ,if. are in lifif. Resistors are l<2 watt, carbon. L, — 16 turns No. 24 enam. close-wound on U-inch diam. slug-tuned form(National XR-50). Inductance adjusted to resonate with tube and straycapacitances at 4th harmonic of crystal,jj j2 — Coaxial connectors, chassis-mounting — connector, male, chassis-mounting (5-prong plug).RFCi — 21 Mh. (Ohmite Z-28). , , .. • u ^ oo ^ iJF(-„ _ 7 „h (Ohmite Z-50 or resistor wound full with .^o JO enam.;.Ti - Grid coil approx. ^h.: turns No. 24 enam. «<.und on K2-inchdiam. slug-tuned form (National ). Antenna 4 turns woundat ground end of grid coil. ._„.., t j a T2-Untuned transformer (Miller 472-LA). Leads at groundends of coils must be unsoldered and separated for making the connec-tions shown above. See text for fur
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
