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Title: ETO Alpha78 User manual Author: WB5HVB& IW1AXR Subject: HF Power amplifier Keywords: ETO Alpha78 User manual Created Date: 8: 34: 26 PM Amplifier; Alpha 78; ETO Alpha 78 Manuals Manuals and User Guides for ETO Alpha 78.
We have 1 ETO Alpha 78 manual available for free PDF download: Operating And Technical Manual. ETO Alpha 78 Operating And Technical Manual (36 pages) High Frequancy liner power amp ALPHA 78 product reviews by real people like you. Only at eHam. net. eHam. net is a Web site dedicated to ham radio (amateur radio). This is a statement of the Quality of the Vintage Alpha Amplifiers! Dick ByrdN4UQ installed the Warc Bands and a full checkup of this amp in 2010 and his paperwork and testing came with the amplifier Feb 15, 2010 Alpha 78 Amplifier.
Nominal rated 2 KW from (3) 8874 tubes. Alpha 78 amplifier manual meets or exceeds maximum legal limit. Covers meters with Bandpass selectable for CW or Phone portion of 1080 meter Bands for NOTUNE operation. This is a Professional Laser printed Copy with 11 X 17 Schematic Diagrams and bound with a spiral binder 78 Operating and Technical Manual: 78 Parts list: PARTSLISTALPHA78APA: 78 Low Drive Modification 78 Tubedeck Blower Replacement Procedure: 78 Bandpass Adjustment: abandpassadj: Alpha Amplifier Keying Specs: AmpKeyingSpecs: Alpha Amplifier Jan 23, 2007 One amp that was recommended over and over, was an older Alpha Radio Products amp, the Alpha 78, a manual& bandpass tuning model using three 8874 tubes.
The 8874 is far from the cheapest watt per buck, but they have a decent life and are readily available. The ETO Alpha 78 HF Linear Amplifier is an excellent choice for folks who are looking for an economical way to get legal limit" notune" capability in an HF linear amplifier.
Protecting ETO Alpha 76A Amplifiers This idea should also work with the Alpha 374A and Alpha 78 amplifiers, which share control circuit design. Drawbacks to this design include the lack of a manual resetyou must wait for the Rt x C1 time delay before