. QST . MODEL VPA40-2, MOSLEY 2Element 40 Meter V-P Beam,less 52 ohm coax line, rotor and mast. AMATEUR NE T$ lOther MOSLEY V-P Beam Antennas{include: Model VPA20-2, 2 Element,\20 Meter, Amateur Net ; Model\VPA20-3, 3 Element, 20 Meter,Amateur \\Net $ ORDER FROM YOUR HAM SUPPLIER Cjoicikoruod, Jync. 8622 ST. CHARLES ROCK ROADST. LOUIS 14, MISSOURI Boost your Station Performance 3 Ways ? JOHNSON MATCHBOXANTENNA COUPLER. BANDSWITCHING— for greater flexibilityRECEIVER MATCHING— for improved receiver performanceEFFICIENT POWER TRANSFER — from transmitter to antenna Bandswitching
. QST . MODEL VPA40-2, MOSLEY 2Element 40 Meter V-P Beam,less 52 ohm coax line, rotor and mast. AMATEUR NE T$ lOther MOSLEY V-P Beam Antennas{include: Model VPA20-2, 2 Element,\20 Meter, Amateur Net ; Model\VPA20-3, 3 Element, 20 Meter,Amateur \\Net $ ORDER FROM YOUR HAM SUPPLIER Cjoicikoruod, Jync. 8622 ST. CHARLES ROCK ROADST. LOUIS 14, MISSOURI Boost your Station Performance 3 Ways ? JOHNSON MATCHBOXANTENNA COUPLER. BANDSWITCHING— for greater flexibilityRECEIVER MATCHING— for improved receiver performanceEFFICIENT POWER TRANSFER — from transmitter to antenna Bandswitching on 80, 40, 20, 15 and11-10 meters, the compact and self-containedMatchbox performs ail transmission linematching and switching functions requiredin medium power amateur stations. Itsrevolutionary circuit design does awaywith the annoying use of plug-in coilsand completely eliminates load-tapping,necessary in other antenna couplers. Almost an infinite variety of antennas inthe to 30 mc. range can be loaded withthe Matchbox. Balanced antennas from25 to 1200 ohms resistance con be matched,while unbalanced, or single wire antennaswithin the range of 25 to 3000 ohmsresistance can be successfully loaded. Inaddition, the Matchbox will tune outlarge amounts of reactance. Nominal input impedance is 52 ohms-maybe used with any transmitter having 250watts maximum power input, and a PA platevoltage not exceeding 1000 volts. Tuning
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
