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Summary of Contents for 77-DX

Page 1: ...t t t t t t t t t t t BROADCA ST AUDIO EQUIPMENT Type 77 DX Polydirectional Microphone RADIO C ORPORATIOn OF AmERICB commERCIAL ELECTRornc PRODUCTS CAffiDEn n J 18 2 4S8 3...

Page 2: ...otderini i rr ctlQos cordi ns co Ol lr orir11 phic L loo1we1 SERVICE PARTS LOCA11 m Cori1inemu l Unite St r tH Ida ska and f a 11ii Sen ioce Pnris Ordn S t l c lil li ill I ch Jiedt ro1 I Su Ca mdt n...

Page 3: ...CAST AUDIO EQUIPMEN T INSTRUCTl1 0NS FOR Polydireclionol Microphone Type 77 DX Ml 4045 F and Ml 11006 C RAD 10 CORPORATIO N OF AMERICA NDUSTR IA l ELECTRON I C PRODUCTS CAMDE N N J P r i e J t fl s OU...

Page 4: ...ii Flgrre J TY 77 0l Hlcrophone Hl ij0ij5 F Fig re 2 Typ 77 01 Microphone Hl 1 1006 C...

Page 5: ...1ibbo11 1111d r1ttoo with nn ni I j ust able a t1utte r to o c urt t a r 1oua areas oC oi ien ina lfhe r i tbe oper 1n11 1s completely cl06ed the m 1c ropl iorao ope ru tu 11 l a non dl ect iooal r i...

Page 6: ...so that tile red cab le i e 11 d is e l ec t r ic I 111 po t ive ht1n the r ound cireuuNt on the rront or tbe a1cropbooa Js in the p o 111t l ve Ital f of tb111 c cl e lllben tbe oot puts or ho or 11o...

Page 7: ...ons to the pre amplifier terminal board or microphone plug Hum may also be induced into the microphone transformer or ribbon by magnetic fields emanating from J OWer transformers or electri cal machin...

Page 8: ...L 1 POSITION UNI DIRECTIONAL PO51T ION Bl DIRECTIONAL POSITION L 2 POSITION NON DIRECTIONAL POSITION L J POSITION Figure Directional Patterns...

Page 9: ...v v UNiCHIH CTIOf tAL ioslTION 60 100 1 000 10 000 1 5 IOOO 0 11 M IF V _ I po v i r I t i I II I vv 1 v Y V i BIO i R C l ION Iii L POSITION v I tlO 100 1poo 10 000 l 000 c i 0 L r M v 1 r V v I_ i...

Page 10: ...d 11ft the screen assembly off the microphone To remove a transformer reactor or cable for replacement purposes first lower the bottom cover as described under Connections Before removing the cable be...

Page 11: ...677 18393 Ull6 71 50907 f flt 1 1 1472 TMttUS T W SHtA 11 0 acou 11c LiNC ASS IIIIL1 lltll TA NS 0 111Wfll 1 0 3 SWITC _ o CA_ NUT _ 9S221 Description Nut cushion retain ing knurled cap nut ith 1 1 a...

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Page 13: ...l in general have their frequency response characteristics little changed by elec trical loading The BK IA and BK 6B are examples of this Microphones which show output impedance variations with respec...

Page 14: ...os T he hum level is referred to 001 Watt and is calculated in the same fashion as the Effective Output Level u ing as the output voltage the voltage produced by the stand ard field Chart Showing Micr...

Page 15: ...lA Velocity with cable Type SK 46 Microphone Amplifier Type BN lOA Microphone Adaptors Pipe Thread to 27 27 Stand to M1he Thread Swivel 27 For SK 30 31 Microphones 12 Catalog References Page Sheet 86...

Page 16: ...RADIO CORPORATIOn Of AmER ICA commERCIAL ELECTROnJC PRODUCTS CAmoEn n J...

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