“Recent Development in Hill and Dale Recorders” (Vieth and Wiebusch, JSPTE, 1938)

Published at 800 × 566 in Things I learned on Phono EQ curves, Pt. 4
“Recent Development in Hill and Dale Recorders” (Vieth and Wiebusch, JSPTE, 1938)

source <a href=httpsarchiveorgdetailsjournalofsociety30socirichpage96mode2up>Journal of the Society of Motion Picture Engineers<a> January 1938 p96<br>Vieth 氏と Wiebusch 氏の縦溝記録装置の論文のアブストラクト<br>Abstract section of Vieth Wiebuschs hill and dale recorder paper

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