Shure VA 300 - Manual - manualsarea.com

Page 3 - VA300-S Speaker Column; DESCRIPTION

VA300-C Console (cont’d) Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 volts, 60 Hz. 80 watts maximum with no signal in. 180 watts with 1 KHz. signal and 100 watts output 400 watts maximum operating - 7 ° C t o 4 3 ° C ( 2 0 ° F t o 1 1 0 ° F ) w i t h o u t d e ...

Page 5 - OPERATING INSTRUCTIONS; General Operating Instructions:

VA300 Vocal Master OPERATING INSTRUCTIONS General Operating Instructions: 1. Set all front panel controls in the following manner: All s w i t c h e s ( 1 ) , ( 4 ) . ( 7 ) . s e t t o “ O u t ” p o s i t i o n ; “ R e v e r b I n t e n s i t y ” C o n t r o l ( 2 ) . a n d a l l “ V o l u m e ” C o...

Page 7 - Column Speaker Placement:

Figure 3. Typical output power vs. speaker load impedance for the VA300 Vocal Master Column Speaker Placement: It must always be kept in mind that every room or space is acoustically unique and there are no set “rules” for speaker placement. A number of generalizations however may be made which will...

Page 9 - SPECIAL OPERATING INSTRUCTIONS

A phone jack marked “Reverb Switch” (17) is located on the rear panel of the console. This jack parallels the Master R e v e r b I n - O u t s w i t c h ( 4 ) a n d a l l o w s t h e r e v e r b t o b e remotely turned on and off when the Master Reverb switch isi n t h e “ I n ” p o s i t i o n . T ...

Page 10 - Low Impedance Microphones:

Phonographs: To connect a” phonograph having a magnetic cartridge, and n o p r e a m p l i f i e r , t o t h e V A 3 0 0 , a t t a c h a c a b l e f r o m t h e p h o n o g r a p h o u t p u t t o o n e o f t h e s i x I n p u t j a c k s o n t h e C o n s o l e . S e t t h a t c h a n n e l ’ s I n...

Page 11 - Additional Inputs Using a Second VA300-C:; Additional Power or Area Coverage:

Adjust the Echo Gain control and the mixer volume con- t r o l s t o m a t c h t h e g a i n o f t h e V A 3 0 0 i n p u t s . W i t h t h e m i x e r c o n n e c t e d i n t h i s c o n f i g u r a t i o n t h e i n d i v i d u a l R e v e r b I n - O u t s w i t c h e s o n t h e C o n s o l e s h...

Page 12 - Connecting a VU Meter:

Set the controls on the second VA300 Console as follows: A n t i f e e d b a c k S w i t c h e s t o “ O u t , ” M a s t e r R e v e r b S w i t c h “ O u t , ” I n d i v i d u a l V o l u m e C o n t r o l s t o “ 0 , ” a n d t h e M a s t e rV o l u m e t o “ 5 . ” A d j u s t t h e E c h o “ G a ...

Page 13 - V A 3 0 0 - C F U N C T I O N A L D I A G R A M; SERVICE INSTRUCTIONS

V A 3 0 0 - C F U N C T I O N A L D I A G R A M Figure 11 VA300 Vocal Master SERVICE INSTRUCTIONS Amplifier Service (See Guarantee): The VA300 Vocal Master Console uses components of the highest quality, operating well within their respective ratings to assure long life. CAUTION: There are no user s...

Page 16 - Power Drain Resistor (R; Reverberation Assembly:

O H M M E T E R C O N N E C T I O N S O H M M E T E R R E A D I N G “Plus” Lead “ M i n u s ” L e a d Collector E m i t t e r Collector E m i t t e rB a s e Base E m i t t e r C o l l e c t o r BaseBase C o l l e c t o r E m i t t e r N.P.N. Transistor P.N.P. Transistor HighHighHighHigh L o w L o w ...

Page 20 - Notes to Circuit Diagram; Ohmmeter Measurements:

Notes to Circuit Diagram D.C. Voltage Measurements: Check the DC voltages first, because any deviation from the nominal voltages will affect the AC voltage. In the power amplifier section, Q31 to Q38, the key DC voltages are +94 (collector of Q33, Q35, and Q37). +22 (collector of Q31), and t h e s p...

Page 21 - VA300-C CIRCUIT DIAGRAM