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SUPPLEMENT TO McHENRY PLAINDEALER . PAGE 14 -WEDNESDAY, JANUARY 24.1*79 Stereo enthusiasts offered wide choice of components The history of radio re­ ceivers has been one of dra­ matic change. Zenith began the manufacture of its radio receivers in 1918 and has been a pioneer in the de- , velopment of new technolog­ ical advances in this area Beginning with the intro­ duction of the first radio powered by home current. Zenith was also instrumental in developing the Stereo FM system that was adopted. with minor modification, by the Federal Communications Commission as the national standard. Today, the company's line of new stereo units offers the consumer a choice of sys­ tems to meet the needs of the individual's taste and budget. For audio enthusiasts who wish to put together their own stereo component sys­ tem, Zenith this fall offers a chdice of two integrated re- Kr Two Great f NAMES \ Together As One.^f! GEM CLEANERS IS NOW SHAMROCK! QUALITY SINCE 1966 After 13 Years as GEM CLEANERS, on east rte. 120, we consolidated our business. bringing you the most con­ venient dry cleaning service\ ever. One location-one great name A name backed by 25 years experience, Shamrock. SHAMROCK CLEANERS "The Gentle Touch of Elegance" McHENRY MARKET PLACE 385-1944 DAILY 7 to 6, SAT. 8 to 6, CLOSED SUNDAYS ceivers. three stereo re­ ceivers, a cassette deck, three turntable/changers, and four different size Al­ legro speakers. The stereo receivers range from 15 watts minimum per channel of RMS power into 8 ohms, over a bandwidth of 20 Hz. to 20 KHz., with no more than 0.4% total harmonic dis- tortion, up to 40 watts minimum per channel of RMS power into 8 ohms, over a bandwidth of 20 Hz. to 20 KHz., with no more than 0.2% THD. All receivers in­ clude flywheel tuning, FM Mute, tape dubbing, tuning meter, signal strength meter, detent controls, loudness control, and high and low Fil­ ters. To add taping capability to the stereo receivers in its line. Zenith offers a separate frontload cassette deck with Dolby noise reduction, au­ tomatic shutofif, record level meters and controls, tape counter and separate mi­ crophone and headphone jacks. There are three record turntable/changers to choose from, each designed to match the stereo receivers. They include such features as a vis­ cous cue, magnetic car­ tridge. and an antiskate sys­ tem to protect against record damage and wear. For those with limited space or budget, Zenith of­ fers two series of integrated stereo systems in which the tuner/amplifier, record changer, tape player or player/recorder are integrat­ ed into one unit. Two of the models offer a unique feature--both cassette and 8-track play/record capabil­ ity. Zenith also offers two inte­ grated stereo receivers with DOLLAR DAYS WORK-DRESS-PLAY BOOTS & SHOES CLEARANCE Men s-Women 's-Children's SAVE UP TO HURRY AND SAVE 30-50°/. OPEN DAILY 8 to 5:30 GIES SHOES AND SHOE REPAIR 1307 Riverside Dr. 385-2801 McHenry THIS ANECHOIC CHAMBER permits a Zenith engineer to accurately measure what he wants to measure -- the sound emanating from the Allegro stereo speaker. The aneehoic ehamber, a "room without echoes," is isolated from the noise and vibra­ tion of the outside world to prevent ambient noise and reflections from distorting sound test results. either 8-track or cassette play/record capability and separate record turntable/ changers and Allegro speaker systems. Other features found on some models include Au­ tomatic Frequency Control on FM, FM Mute to silence between-station FM-noise, viscous-damped cue on the record turntable for raising or lowering the tone arm, and flywheel tuning for smoother radio station selection. The stereo receivers and integrated stereo receivers and systems have been de­ signed to match the compa­ ny's line of four different sizes of Allegro speakers. Each speaker features the specially designed tuned port that enhances the reproduc­ tion of lower bass tones and works so efficiently that comparable size air- suspension systems need fully twice the amplifier power to equal Allegro's over-all sound performance. The two new Allegro speakers in the line also have removable front covers and feature rotary mid-range and/or treble controls, and charts displaying their flat frequency response. Too much, too little • • • Windows differ in conserving energy In terms of the way they waste energy, no two win­ dows are exactly alike. And short of completely replacing existing windows with ther- malized windows, which isn't always the best eco­ nomic solution, you can't be sure your windows are energy-efficient. That is, unless you know your particular energy prob­ lem, and unless you know the best right solution to that problem. Sometimes, th$ addition of storm windows will do about as much, at one-fifth the cost, I to improve your windows' ef­ ficiency as installing new windows. But in dther instances, where the existing windows are deteriorated, the applica­ tion of storm windows will do very little to improve the energy efficiency, and your investment will be wasted. The key to deciding which measure will probably effect t h e b e s t e c o n o m i c solution -- balancing cost against payback--is the in­ filtration, or crack leakage, condition of the existing win­ dow. If your windows are weatherstripped or other­ wise relatively air-tight and free of drafts when the wind blows, you're a candidate for storm windows. Your main problem is conduction energy loss ... the transfer of heat directly through the frame and glass. Particularly is this true of windows with single glass. This is the primary pur­ pose of a storm window . . . to provide a second layer of glass, which cuts the conduc­ tion energy waste to one- half. Even if you have insulating glass, a stonn window 'yvill further improve your con­ duction savings by an addi­ tional 15%. If your windows leak air, you should be thinking about replacing them. And the fas­ ter they leak air, the faster you should be thinking. Minimizing infiltration heat loss in winter and heat gain in summer can be more important in reducing your fuel bills than the conduction problem, which the storm window helps solve. If your windows are be­ yond the help of caulking and weatherstripping, there's probably only one solution. And that's new windows, with good weatherstripping which will minimize the crack leakage energy waste. Of course, your new win­ dows will have to have in­ sulating glass, too, unless you already have good storm windows. Even if your primary prob­ lem is crack leakage, you still need multiple layers of glass to reduce the conduction loss. And if you don't want con­ densation problems, your new/ windows will need insu­ lated frames. 'he basic facts about Windows and Energy" are explained and illustrated in a new brochure which is avail­ able, without charge, by re­ questing it from Season-all Industries, Department MS, Consumer Publications, In­ diana, Pa. 15701. The brochure shows the relative importance of win­ dows, as compared to ceil­ ings,walls and floors,in terms of energy conservation op­ portunities, and outlines the different window energy problems, matching them up with the best economic solu­ tions. J