Shure 577B user manual

Summary of the content on the page No. 1

Model 577B User Guide
NOISE-CANCELING HANDHELD DYNAMIC MICROPHONE
OPERATION
For optimum performance and maximum rejection of background
noise, place your upper lip against the lip guard, approximately 25
mm (1 in.) from the grille. Hold down the push-to-talk button while
talking normally.
INTERNAL CONNECTIONS
The 577B is a balanced-line, low-impedance dynamic microphone.
It is designed for direct connection to low-impedance microphone
inputs and/or installations where long cable lengths are nee

Summary of the content on the page No. 2

CIRCUIT MODIFICATION Dimensions See Figure 3 To modify the microphone circuit for normally shorted operation, 45 mm 14 mm proceed as follows: (1-25/32 IN.) (9/16 IN.) 1. Remove the three No. 6 Phillips screws from the back of the 8 mm (5/16 IN.) microphone case. 2. Separate the front and back sections of the case, and remove the press-to-talk switch button. 3. Unsolder or clip the GREEN cable lead from the press-to-talk 19 mm (3/4 IN.) switch solder lug. 94 mm (3-11/16 IN.) 4. Solder the GREE