. QST . GE, South Adams St., Peoria 2, III., W9YYM, Mgr. Hints & Kinks {Continued from page 4^) been replaced with a VR-150. This substitutionincreases the voltage for the oscillator tube andraises the screen potential of the 6L6. Recalibra-tion of the VFO after the modification was notnecessary. — H. Van Hooser, W4DIJ CRYSTAL STORAGE RACK WE find it necessary to have quite a number ofcrjstals on hand to cover the whole of anyamateur band. When changing frequency, it hasl)een necessary in the past to dig and sort througha bo.\ or jar until the appropriate crystal waslocated. The confus
. QST . GE, South Adams St., Peoria 2, III., W9YYM, Mgr. Hints & Kinks {Continued from page 4^) been replaced with a VR-150. This substitutionincreases the voltage for the oscillator tube andraises the screen potential of the 6L6. Recalibra-tion of the VFO after the modification was notnecessary. — H. Van Hooser, W4DIJ CRYSTAL STORAGE RACK WE find it necessary to have quite a number ofcrjstals on hand to cover the whole of anyamateur band. When changing frequency, it hasl)een necessary in the past to dig and sort througha bo.\ or jar until the appropriate crystal waslocated. The confusion associated previously with theselection of a crystal has been eliminated by therack showii in Fig. 7. The holder was made from al)iece of oak board measuring % by 23^^ by 6inches. The four rows of holes shown in the draw-ing are made with a No. 39 drill and accommodatea total of 20 Type FT-243 crystals. Fig. 7 —Thiscrystal storagerack can be an at-tractive and use- g ful addition tothe ■ZVz The size of the rack was determined by thenumber of crystals on hand and may be alteredto suit the individual requirements. Oak boardwas selected because of its hardness, thereb> pre-venting the enlargment of the holes through pro-longed usage. The whole unit was finished in lightoak stain and coated with good varnish. A back-ing of pool cloth is an extra refinement and a pairof screw eyes permit hanging on a wall. — Jack C. Andrews, W9YWE 150
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
