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In the Forum: Melquiades Amplifier
In the Thread: R22
Post Subject: R22Posted by Domidaw on: 12/30/2021
Anthony,
First of all, I would like to congratulate you on making your amplifier. I have been following your build from the beginning and now that I am building my own amp, I appreciate your work even more. I admire your plan and execution of the amplifier.
Coming back to the topic (this topic should probably be moved to the question and answer thread) My TR3 is a toroidal transformer that was made for me after presenting the diagram for the contractor. The label says sec. 240v but when I connect a "bare" transformer to the mains and measure it, it shows 280v. I changed the r22 resistor to 20w and the problem does not disappear. It heats up suddenly, after 30 seconds I can't even touch it, and after 2 minutes it starts to swell. Something is not as it should be. I checked the connections a million times and it looks like everything is connected according to the scheme ....
As you can see in the attached photo, I have 240v in front of the resistor, and behind the resistor I have as much as in point D. And this voltage can be regulated via the VR2 potentiometer. I have no idea what to do next.
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