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History of the manufacturer  

Ehrhorn Technological Operations Inc.; Colorado Springs, CO

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Name: Ehrhorn Technological Operations Inc.; Colorado Springs, CO    (USA)  
Abbreviation: ehrhorn
Products: Model types

Ehrhorn Technological Operations Inc.
4975 North 30th Street, Colorado Springs, CO 80919

Designs and manufactures linear amplifiers for radio amateurs.

Ehrhorn Technological Operations were located in Brooksville, FL (USA) in August 1974.

Founded: 1970

This manufacturer was suggested by Jean-Luc Potart.

Some models:
Country Year Name 1st Tube Notes
USA  90 Alpha 86 3CX800A7  Alpha 86  may be user-modified to extend coverage to 29.7 MHz. Units delivered els... 
USA  72 Alpha 77 [PA-77] 8877  Frequency  Coverage :   3  to  30  MHz  continuous  ... 
USA  90 Alpha 77 DX [PA77-DF, PA77-Dx,Alpha77 Sx] 8877  Frequency Coverage : 1.8-2.0 and 3-24 MHz (24~30 MHz, PA-77Dx only) Plate Power Inp... 
USA  77 Alpha 76 PA-76P; PA-76C 8874  Model 76P -- Identical with PA-76 above except tube complement is three 8874, increas... 
USA  70 Alpha Seventy (70) PA70-V 3CV1500A7  The ETO  Alpha Seventy PA70-V is a  vapor-cooled, legal limit linear amplif... 
USA  74 Linear Amplifier Alpha 374 8874  The Ehrhorn Alpha 374 is a linear amplifier operating on all amateur bands from 3.5 to 30 ... 
USA  70 Alpha Seventy (70) PA70-A 3CX1000A7  The ETO  Alpha Seventy PA70-A is an air-cooled, legal limit linear amplifier, operati... 
USA  80 Linear Amplifier Alpha 374A 8874  Linear amplifier covering the frequency from 1.8 to 2 MHz and 30 MHz in manual continuous ... 
USA  80 Linear Amplifier Alpha 78   Linear amplifier covering the same frequencies of model 374A: 1,8 - 2 MHz and 30 MHz. Con... 


Further details for this manufacturer by the members (rmfiorg):

Ehrhorn logo from 1974tbn_ehrhorn_tecnological_logo_1974.jpg
Ehrhorn header with addresstbn_ehrhorn_tecnological_header_1974.jpg