.....obsolete user manuals, a lot of repair manuals, free service manuals, rare schematic diagrams, usefull service instructions, pdf books, how to repair instructions, lost operating manuals, old handbooks, tons of part lists, hidden service bulletins, your instruction books, informative repair tips, complete disassembly routines.....


What are you looking for?

extended search


ETO Ehrhorn Technological Operations ALPHA 77Sx Amplifier
Manufacturer:
Model:
ALPHA 77Sx
Date:
1990
Class:
Type:
SubType:
HIGH FREQUENCY LINEAR POWER AMPLIFIERS

Information

The ALPHA 77Dx (type accepted model PA-77DF and government/export model PA-77Dx)* is a high power HF linear Amplifier of exceptional quality, ruggedness, and sophisticated design. It is much smaller than other amplifiers of comparable capability, yet provides greater operational versatility, cooler operation, and a lower acoustical noise level than much larger and heavier units. Unique design features of the ALPHA 7?Dx include ETO's exclusive full-cabinet ducted air cooling system, built-in CW break-in keying system, frequency coverage down to 1.8 MHz, and a highly efficient custom power transformer using a tape-wound core of grainoriented silicon steel. High efficiency of operation is maintained across the tuning range by a combination of vacuum variable output tuning capacitor and ETO's expertly designed mixture of silver plated, heavy copper tubing coils and multi-insulated, toroidal inductors.

show more

Service and User Manual
Manual type:
Service and User Manual
Pages:
40
Size:
1.29 Mbytes (1350229 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
unknown
Quality:
Scanned document, all readable.
Upload date:
2014 04 27
MD5:
0fca9201e38d86a46ec2c70a73acd9b4
Downloads:
1824

Information

2 RF and Control Connections ... 5 SECTION 3 - OPERATION ... 8 Control Positions ... 8 Tune-up Procedure . . ... 9 Final Operational Adjustments «Sc Monitoring . . 11 Operating N o t e s ... ... 12 Troubleshooting Hints . ... 14 SECTION 4 - THEORY OF OPERATION ... 16 SECTION 5 - ILLUSTRATIONS ... 21 Front Panel; Rear Panel ... 21 Front Sub-panel; Back Side of Front Panel . . 22 RF Section, Top and Side, Covers Removed . . 23 Power Supply Section, Side and Oblique ... 24 Tube Deck, Underside; Circuit Board CB-2 . „ . 25 Circuit Board CB-3; Wattmeter „ ... 26 Schematic, RF Section & Tube D e c k ... 2? Schematic, Power Supply & Main Chassis ... 28 Schematic, Front Panel ... 29 Schematic, Circuit Board CB-2 ... 3° Schematic, QSK Circuit Board CB-3 ... 31 SECTION 6 - STANDARD ELECTRICAL PARTS L I S T ... 32 ET0/"ALPHA" PRODUCT WARRANTY ... Outside Back Cover

show more

Add Comment

* Required information

Comments

No comments yet. Be the first!