Operadio Mfg. Co. PA Schematics for Tube Audio Amplifiers - Only $7.95! DOWNLOAD AND PRINT ! Operadio public address audio amplifire schematics for the models listed below are published service data from vintage sources*. Each schematic is individually digitized in high resolution to provide the clearest possible scan in a downloadable Adobe PDF file. Service file is usually 1 to 2 pages. It normally takes up to 24 hours to receive the download instructions via email but please allow 1 - 2 business days. Operadio Tube Audio Schematics If your model or chassis is not listed below contact me for availability. Download Copy Only $7.95 Model/Chassis Number Select Model Here 1A35 1A65 1A70 1A140 4A11 4A25 4A25A 4A25C 4M25 108 PA System 117 PA System 124, W PA System 132 PA System 135, W135, Type A, early/late 135, W135, Type A Late 140 Type B, Early 145, W145, Early 145 Type C 145, W145, Late 154 155 160, W160, Late 161 162 164 170 190 420B-6 813 Amplifier 817 Amplifier 822, 822P Amplifier 831 Amplifier 833 Amplifier 835 835 AUR 835 U 835 UR 870B 950 990 1005 1010 1010A 1012B 1180A 1025 A3580 A3585 A3590 E135, EW135 E145, EW145 Operadio PA/Audio Models/Chassis Available: 1A35 1A65 1A70 1A140 4A11 4A25 4A25A 4A25C 4M25 108 PA System 117 PA System 124, W PA System 132 PA System 135, W135, Type A, early/late 135, W135, Type A Late 140 Type B, Early 145, W145, Early 145 Type C 145, W145, Late 154 155 160, W160, Late 161 162 164 170 190 420B-6 813 Amplifier 817 Amplifier 822, 822P Amplifier 831 Amplifier 833 Amplifier 835 835 AUR 835 U 835 UR 870B 950 990 1005 1010 1010A 1012B 1180A 1025 A3580 A3585 A3590 E135, EW135 E145, EW145

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* Schematics offered here are digitized in high resolution from early service publications specifically for servicing public address (PA) systems. Each PA schematic is digitized individually and checked to provide the clearest diagram possible from the original printing.

The data and files offered here are from vintage sources that are no longer published. There is no guarantee of the accuracy of any information offered. It is solely up to the end user to decide that the information and files offered here are accurate and fit for use with their equipment. I am not responsible for any loss or damages that may be incurred from the use of this information.