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AREA CODE 806- POrteh 2-8759- 1320 19TH ST LUBBOCK. TEXAS 79401

Ed Marriner W6BLZ 528 Colima Street Lo Jalla, California

KWfL S

The local radio parts store, and metal supply have enough simple parts to build a good sideswiper for electronic keys. This idea is better than it makeshift key using a hacksaw blade or tearing up a regular telegraph key.

All of the parts for the key are mounted on a lead base to keep the key solid on the operating table. Lead is also easy to drill and tap,

Ed has been licensed since 1931 with one calt-W6BLZ. lie is a System Engineer for the VS. Naval Electronics Lab in San Diego and has had 350 articles printed in various magazines.

Fig, I. W6BLZ's sideswiper for electronic keyers. The base is made from lead molded in a sardine can.

KWfL S

and should oifer no problem ior the home constructor. The mold is made from a sardine can, and the round corners give a pleasing appearance to the key.

Construction

First go to the grocery store and select a nice can of sardines, and a size suitable to your liking. Dispose of the sardines and trim the metal off to the edge of the can and clean it out thoroughly. Heat some lead in a small crucible or small skillet and pour the lead into the can. When (he lead has cooled, tear awav the tin by using pliers or diagonals. Any roughness left on the surface of the lead can easily be filed away with a rough file, and (hen smoothed with sandpaper. Use the bottom side of the can for the top of the base. Spray the base with lacquer after all of the holes are drilled and tapped.

To make construction simple, the contact eads are fastened to a Jones type barrier strip mounted on the base by tapping in 6-32 holding screws. All of the radio brackets are found in the Widsco displays in the parts store. The brackets are all fastened by tapping into the lead. The two front contacts for dot and dash are mounted on an insulated dowel of either fiber or wood, which have been driven into a % inch hole put in the lead, he contacts for the key are made simply from 8-32 machine screws. These were used because the hole in the 90 degree bracket is just the right diameter for tapping 8-32 threads, and makes a good adjustable contact. A cap head type screw is best so that it will clear the fi-32 head holding the bracket to the base.

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plenty of power, fixed or mobile operation—all the features you'd want in a top quality, 6-meter transceiver.

Just Jo ok at what you get in this compact, high-power, iiftra-sensiiive successor to t/ie /amed 99'er.

—'" - - --- ■—— —- "——- — — l|jhm 11*1 * • i , . -

SUPERSENSITIVE RECEIVER • Dual conversion design with sharp 8 KC selectivity for freedom from birdies, tweets and spurious signals. • S Meier doubles as tuneup meter for transmitter. * Full 49.9 to 52.1 mc coverage for accurate dial readout-excellent band spread. • Sharp cut-off, adjustable squelch. • Excellent AGC performance. • RF stage provides optimum usable noise figure-freedom from cross 77ioduIation and overload. 0.5 uv sensitivily captures weakest signais. • 2 waits audio output with internal speaker. Provision for external speaker. * Effective automatic noise limiter.

POWERFUL TRANSMITTER • High efficiency, 22 watt final amplifier, driven by straight-through amplifier for low-low harmonic output. • Dual self-contained, solid-state power supply for both 115 VAC or 12 VDC operation, * Push-to-taik wilh provisions lo automatically switch Apollo Linear and external VFO. * Broadband, multi-tuned cxciter stages for rapid QSY and freedom from spurious outputs-no TVI problems! * High level modulation wilh speech clipping for top talk power, • Transmitter frequency spotting switch. • Operated with 8,3/12,5/25 mc crystals, Ideal for MARS, CAP. Wide variety of accessories for CD application. See the Clegg 1,6G,er,i today, $249.95. Microphone $10.50, Squires-Sanders, Inc., 73 Martinsville Road, Millingtonj N, J. 0794G.

Squires Sanders Inc

A % inch M metal brass bar was obtained at a metal supply house for the lever arm. It is fastened to the base by attaching a small brass hinge which lias been sawed in half. Having tried all of the pivots and bearings, the cheapest and best turned out to be tl is liinge which only cost 40 cents for a set of four. Any slop in motion can be corrected by pinching the metal going around the pin. It is better to attach the hinge to the lever with a screw and then drop a bit of solder on it with a s nail torch or large soldering iron. The particular hinge was type #5075XC, manufactured by the Bratnerd Mfg Co. East Rochester, N+Y,? it is a % inches x % wide, solid brass butt type hinge-

wo holes were drilled into each side of the lever arm to accept the ends of the tension springs to keep them in line. The springs were found in a hardware store and had a light tension. They could be taken oil from surplus relays. The springs should be soldered on to the ends of the adjustment screws going through the bracket.

Adjustment

Once the key is finished, insulated wires can be run back from each contact to the terminal strip. Since the base is ground, a screw can be rim through the middle terminal screw and tapped into the base making it necessary to only run two wires from the contacts. The two springs can be used to center the lever arm, or stops can be screwed into the base to suit the operator adjustment.

This key is easy to make, functions smoothly and looks a little better than many other make shift devices used for keying the automatic keyers. Besides, think of (he enjoyment Pussy Cat will get eating all those sardines!

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