Equipment information:

ETO Ehrhorn Technological Operations Alpha 91ß Amplifier
Manufacturer:
ETO Ehrhorn Technological Operations
Model: Alpha 91ß
Date:
Category: Radio, Communication
Group: Amplifier
Description: HF LINEAR POWER AMPLIFIER
Information:
                                    The ETO 91/3 is a self-contained, HF linear power amplifier
capable of continuous operation
at 1500 watts peak power output on SSB, keyed CW, SSTV,
RTTY, digital modes or AM, with
no time limit. If periods of "con tinuous-key-dcrwn" carrier
operation will exceed 5 minutes, the
optional auxiliary cooling fan available from ETO must be
installed to avoid possible damage not
covered by the warranty.
As shipped, units delivered within the USA and its
territories are manually tunable to cover
all HF amateur bands from 1.8 to 14.35 MHz, with extensive
out-of-band capability for
operation on MARS, etc. Appropriately-licensed users may
contact ETO for information
on modifying domestic amplifiers to extend coverage to 29.7 MHz.

These manuals are available for the above equipment:

ETO Ehrhorn Technological Operations -- Alpha 91ß -- Service and User Manual
File name: Alpha-5847-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 33
Size: 944.61 Kbytes (967285 Bytes)
Language: english
Revision:
Manual-ID/Number:
Date:
Quality: Scanned document, all readable.
Upload date:
MD5: 1f9d8463cee3241e926ce40d55f9d19a
ed2kID: f8a8749ef1f6dd48db75ce42047dff84
Downloads: 102 since 27 April 2014
Information:
CRITICAL PRECAUTION DURING INSTALLATION 1
Section 1 INTRODUCTION 1
General Description of the ETO 91/3 Amplifier 1
Specifications, ETO 91/3 1
Figure 1 Top View 3
Section 2 PREPARING THE ETO 91fi FOR OPERATION 4
Transformer Installation 4
Inspection of Tubes & Chimneys 4
AC Primary Connections & Amplifier Grounding 4
Operation from 90-130V mains 5
Figures 2-4 Transformer Installation 6
Section 3 AMPLIFIER/STATION INTERCONNECTIONS 7
Coaxial Cable Types & Connectors 7
T/R Control Cable 7
ALC 7
Figure 5 Back Panel 8
Section 4 OPERATION 9
4.1 Control Functions 9
4.2 Tune-up 9
1. Turning On the Amplifier 10
2. Tuning Up for Operation at 1,500 Watts RF Output 11
4.3 Reflected Power Protection 12
4.4 ALC 12
Section5 OPERATING AND MAINTENANCE NOTES 13
Tubes 13
Fuses 13
Electronic Bias Control 14
Plate Overcurrent Relay 14
Preventive Maintenance 14
Section 6 TROUBLESHOOTING HINTS 15
Section 7 DESIGN AND CIRCUIT OVERVIEW 17
SCHEMATICS 19
Alpha-5847-Manual-Page-1-Picture
Start Free Download


Comments

No comments yet.

Add Comment

* Required information
(never displayed)
 
Bold Italic Underline Strike Superscript Subscript Quote Line Bullet Link Email Image Video
 
Smile Sad Huh Laugh Mad Tongue Crying Grin Wink Scared Cool Sleep Blush Unsure Shocked
 
1000
Type the word for the number 9.
 
Enter answer:
 
Notify me of new comments via email.
 
Remember my form inputs on this computer.
 
 
Powered by Commentics