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Image from page 1141 of "QST" (1915) | by Internet Archive Book Images
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Image from page 1141 of "QST" (1915)

Identifier: qstamer00amer

Title: QST

Year: 1915 (1910s)

Authors: American Radio Relay League

Subjects: Radio Radio

Publisher: [Newington, Conn., etc., American Radio Relay League]

Contributing Library: Internet Archive

Digitizing Sponsor: Internet Archive



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About This Book: Catalog Entry

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Text Appearing Before Image:

SHEET-METAL SCREWS Fig. 1 — This simple homemade bracket mounts onthe rain trough of a car and supports a 144-Mc. verticalwhip. adapter so that a homemade whip, based with aType 83-1SP connector, can be quickly fastenedto the assembl^^ Fig. 2 shows a more complex but more efficientantenna mount. The base for the assembly, arubber suction cup such as is used with car-topcarriers, is fitted with a brass adapter (home-made) that mates with a Type 83-lT coax Teeadapter. The suction cup and the brass insert arefastened tog«!ther with a flat-head machine screw.The head of the screw is covered with a fiberwasher to prevent contact between the screw andthe inner conductor of the Tee adapter. If the inner conductor of the Tee is drilled out at thebottom end, it will not be necessarj^ to use thefiber washer. R.f. power is fed to the center tap of the Teeadapter via a length of RG-58/U cable, a Type 4 of RG-58/U WITH83-ISP at EACH END


Text Appearing After Image:

83-lTCOAX TEEADAPTER RUBBER SUCTIONCUP Fig. 2 — A simple but efficient method of mountinga 144-Mc. whip at the center of a car roof. 83-lF plug and a Type 83-lJ straight adapter.The 19-inch whip, equipped with a 83-lSP con-nector, mates with the top end of the Tee adapter. Both of the installations are neat in appearance,can be easily mounted on the car, and permitrapid removal of the antenna. When mountingthe system shown in Fig. 2, it is advisable to applja thin film of glj-cerine to the inside of the cupbefore ^he latter is fastened to the roof of the car. Incidentally, a gain in signal strength is evidentwhen changing over from the rain trough to theroof-center mounted antenna. — Gerald Bagdy, W2JUL OSCILLATOR MODIFICATION FORTHE GLOBE SCOUT TRANSMITTER THE 6V6 oscillator tube in the W.R.L. GlobeScout transmitter requires more drive thansome of the small VFO units will deliver. Thiscondition can be quickh remedied bj changingthe oscillator tube to a 6AG7, as suggested to meby



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