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1945 Theatre Catalog, 4th Edition, Page 367 (343)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 367
Page 367


1945 Theatre Catalog, 4th Edition, Page 367

OUII

AST

Licensed Under U. S. Patents of Western Electric Co. Incorporated

THE app-so SERIES AMPLIFIER '

The PD-SO Series amplifier incorporates all latest develop SOUND HEADS







SOUND MASTER sound heads are manufactured to meet designs and response standards

of highest quality reproduction.

HORN SYSTEMS

SOUND MASTER horn systems provide the ultimate in sound reproduction and perfect These horns are provided with cellular horns for highs and folded type horn

distribution.

baffle for lows.

PROJECTION ARC LAMPS

LIGHTMASTER high intensity projection arc lamps incorporate the extra rug



gedness. heavy duty con struction - mechanical pre that trouble-Tree

operation and long life.

assures

BASES

Designed and

to meet requirements

lamps.







PROJECTION

constructed

reproducers. projection arcprojector mechanisms. and larger magazines

. controls and locking by devices instantly accessible

. leveling adjustment provided for "lit-\EII floors.



1. All transformers and treated.

Wide range tone control. Exciter lamp balance.

FPPPOF'PWPSMN

I-II-x

Built-in booth plifier.

,.. .N

protection. . All connections

plug-type.

from

i-lb-l who:

jector.

PD-SO CHASSIS



M CHASSIS

present day. modern sound

0110 look at the workmanship in this piece of equipment is enough to conIince even the most critical user of the high quality of performance adordcd SOUND MASTER amplifiers. A stand-by unit of this amplifier is available for stand-by Mic. The entire unit can he channg in a matter of a law "IOIIIPHls.

I4 POINTS OF QUALITY

THAT MAKE THE ROYAL SOUND MASTER PD-50 AMPLIFIER AN OUTSTANDING LEADER IN THE FIELD OF SOUND REPRODUCTION AND AMPLIFICATION

chokes

Plug-in type filter condensers. Calibrated step-type volume control.

Exciter supply voltage control.

Amplifier voltage control.

Photovelectric cell voltage control. Auxiliary volume control.

Sound change-over in photo-electric circuit. monitor and monitor am Complete extra chassis available for standby chassis to cabinet

. Remote volume control and available for working side of No. 2 pro

ments production.

Climatite treated transformers and Type filter condensers. . .

control. .

electric cell circuit. . through low capacity cable . tions to amplifier . . .

essential for

high quality,

brilliant,

chokes. . . . Calibrated step type volume . Instantaneous silent change over in photo. Photo-electric cell connections . . heavy cable lock connec DESIGNED TO LEAD - BUILT TO LAST....

life-like re Plug-in

wide range tone control. . . . Built in

booth monitor and monitor amplifier.

humless reproduction . . .

. . . True, life-like all these things make SOUND

MASTER amplifiers outstanding the world over.

iiClimatitei,

change-over



CALIBRATED STEP-TYPE VOLUME CONTROL

Volume, in the PD-SO, is controlled by a precision, calibrated. step-type volume control of advanced design.



PD-SO AMPLIFIER



PLUG-IN CONDENSERS

This type makes condenser changing as easy as putting in a tube

. no wasted time . no wasted effort.



REMOTE CONTROL and CHANGE OVER

This unit makes

t h e S 0 U N D MASTER PD-SO extra simple to operate. It brings sound control to the working side of each projector.



THE BALLANTYNE COMPANY

I 707-1 I DAVENPORT STREET

Huts-TREAT}:

CA 1 Afro G

OMAHA 2, NEBRASKA, U. S. A.

Export Department: Frazer 8. Human ' Cable "FRAZEN" 301 Clay Street, San Francisco H, California, U. S. A.

To furiI'th/r imp/inv rr I/Ir I/l'nw. [Ilmn' Inrn/iou l/Iir mlumr mu] [mgr Numb".
1945 Theatre Catalog, 4th Edition, Page 367