Tag Archives: amplifier

Thrift Store Jamo MPA-101 Repair

Posted on February 11, 2013 by jwk

I started working on a Jamo MPA-101 amplifier back in August for a friend and after some early work it sat for a while. He’s re-doing his audio system at home so I spent a few hours to finish troubleshooting … Continue reading →

Posted in DIY, Electronics, Projects, Speakers | Tagged , , , , , , , , , , , , , , , , , , , | 11 Comments

New Project: Jamo MPA-101 Amplifier Repair

Posted on August 1, 2012 by jwk

Project’s Conclusion Here My friend brought me this Jamp MPA-101 amplifier he picked up at a garage sale, complaining in only puts out some rumbling and humming. It looks like it’s suffered a failure in the power supply at some … Continue reading →

Posted in DIY, Electronics, Projects | Tagged , , , , , , , | 2 Comments

Build Log and Review: Mable Audio VT-86PP Kit Hi-Fi Amp Project

Posted on March 30, 2012 by jwk

About a year ago, someone left a comment that really looked like spam on one of my pages advertising a web store selling tube audio gear and parts for guitar and audio amplifiers. Against everything I’ve ever learned about behaving … Continue reading →

Posted in Electronics, Hardware, Photos, Projects, Radios and Tubes, Technology | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Huge and Powerful: The 1937 GE F-135 Repair Complete

Posted on January 27, 2012 by jwk

I’ve finally had the time to finish one of my long-running projects repairing GE’s most powerful radio offering from 1937, the GE F-135. I picked it up from Craigslist back in November but other responsibilities kept me from getting much … Continue reading →

Posted in Photos, Projects, Radios and Tubes, Vintage | Tagged , , , , , , , , , , , , , , , , , , | 7 Comments

New Project Idea: Oddball Tube Hi-Fi Amplifier

Posted on July 12, 2011 by jwk

I’m looking for a new summer project, and think I’m going to branch off from repairing radios to building some of my own gear. I’m interested in making a tube hi-fi stereo amplifier to go with my old speakers – … Continue reading →

Posted in Electronics, Projects | Tagged , , , , , , , , , , | 3 Comments

Burned Up Aiphone

Posted on March 10, 2011 by jwk

This is what happens when you connect the high level output of an audio amplifier, to an input designed to be hooked up to an MP3 player or other line level audio source. This Aiphone PA amplifier was incorrectly installed … Continue reading →

Posted in Commentary, Hardware | Tagged , , , | Leave a comment