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In the Forum: Melquiades Amplifier
In the Thread: Building Melquiades: Chronicle of full-range
Post Subject: Re: Building the Melquiades: strange behaviorPosted by Romy the Cat on: 6/24/2006
I run some sweeps on the new Melq. It looks like it is moderate, somewhere from 20-21Hz to 22-23Khz. Since I run the 6C33C at near 60W for now it is fun to see how it works. In the scope the repose and the distortion at LF looks kind of funny but I have a small transformer with juts 200mA gap in there. What is funny with this Melq that I was not able with THIS amp to drive 6C33C intentionally into temperature instability. I have some 6C33C withy very dead anode and those tubes dive into temperature instability with fixed bias even if they sit 5 feet away form power outlet. However, in this Melq I was not able to do anything to then to heat up the plate. I burned two12Ohm 12W resistors running the Melq with 5V (deep into clipping) input of 10Hz. With this stress the 6C33C plates should go crazy but to my huge surprise the anodes behaved perfectly. And it was with the verified dead tubes and slightly higher filament voltage!!!!
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