Hebel Schalter 



132 



Hei 1 Steuerung 



lever-ad justed cat whisker crystal 

 detector. -Schalter, Zweipol- 

 double-lever switch, -wage beam 

 scale, lever s. -Wirkung lever- 

 age, lever action, purchase. 



Hebepunkt fulcrum. 



heber, Kontrast- (dynamic-range) 

 compandor (comprising compressor 

 and expander, to improve signal- 

 noise ratio). 



Heber-barometer syphon barometer. 

 -haarrohr capillary syphon, -pumpe 

 syphon pump, -rohr syphon tube, 

 syphon, -schreiber syphon record- 

 er. 



Hebeschritt, Wähler- vertical step 

 of selector (automatic telephony). 



rieck stern. 



Heft handle, hilt; number or issue 

 of a magazine, stitched booi<let. 



heil gerät therapeutic apparatus 

 (e.g. using short waves, rays, 

 etc. ). 



Heimfernsehempfänger home television 

 receiver. 



heimlauf backstroke, return s. or 

 motion; retrace or flyback (of 

 pencil or beam, in telev. tube, 

 often gated by blanking pulse). 



Heiserkeit raucousness, hoarseness. 



heissbriichi g hot-short. 



Heissdampf superheated steam. 



heissgrädig difficultly fusible. 



Hei ss-kiihlung cooling by evapora- 

 tion, -leiter hot conductor 

 (with negative temperature coef- 

 ficient), third class conductor. 



Heiz-kathoden-Roentgenröhre hot- 

 cathode X-ray tube, Coolidge tube. 

 -kör per heater (e.g., for indirect- 

 ly heated cathode), heating ele- 

 nent; radiator, -kraft heating 

 power, calorific p. -lötstelle 

 hot Junction (of a thermocouple). 

 -mantel heating jacket, -unruhe 

 fluctuation in heating current, 

 ripples, -wendel heater spiral, 

 heater coil. 



hell bright, brilliant, light, pale, 

 clear, transparent, limpid; strid- 



ent, shrill (ac). 



Hel 1 anpassung bright adaptation, 

 light a. , photopia. 



Hell-Dunkel-lntervall light-dark 

 range, -llnlen light-dark lines. 



helle Klangfarbe strident timbre, 

 shrill t. -Stelle (im Film) clear 

 portion (in film). 



Helle, Flächen- brightness of a sur- 

 face, intrinsic brilliance. 



Hel Ifeldbeleuchtung bright ground 

 illumination (micr. ). 



Helligkeit (als physikalische Grösse) 

 photometric brightness, luminance, 

 radiance (in candles per unit 

 area), -(als psychologische Grösse) 

 visual sensation, -eines Objektivs 

 speed of a lens or objective. 



Helligkeit, mittlere average back- 

 ground illuminaLion (telev,). 



Helligkeit, F-lächen- surface bright- 

 ness, intrinsic brilliance. 

 Grund- background, mean or average 

 shading component, d.c. component. 

 Objektiv- speed of a lens or ob- 

 jective. Raum- volume brightness. 

 Ton- pitch (sound sensation). 



Kel I igkeits-anglei Chung brightness 

 matching, -schwebung brightness 

 flutter, -signal, Bild- video 

 signal, picture shading s. 

 -Steuerung brilliance modulation, 

 brightness control, intensity m. 

 -stufe intermediate brightness 

 stage, i. grey value (between 

 black and white), shading or 

 tonal V. -umfang brightness 

 range, contrast, key (of a pic- 

 ture), -vertei lung brightness 

 distribution (of highlights and 

 of shadows), -wechsel je Sekunde 

 frame frequency per second, num- 

 ber of illuminations of a picture 

 point p.s. -werte brightness 

 values, density v., shading v. 



Hell-rotglut bright red heat. 

 -schreiber Hell-type recorder. 

 -Sektoren shutter openings. 

 -Steuerung modulation to light 

 condition. 



