It has been nearly a year since I had this project pugged in and running, and over the last couple of monthes I have been reconstructing the amplifier and have after finally making a suitible 24V regulated power supply I hooked the amp up for a test run on my big JBL's, for the first time ever!!!
At first I didn't think it would have near enough power to drive them, but it did just fine, although lacking a bit in the low frequencies but even so it sounded amazingly good, actually better than when I first built it, and runs amazingly quiet! Quieter than my Mini preamp!!
If I threw a sub along side the amplifier it would probably sound as if I had a 50 watt system at hand because the amplifier seems to have alot of kick for only 1.4 watts per channel.
I have yet to take some pictures of the amplifier, as it looks much more complete than it did before. I painted the transformer, sanded scuffs and sharp edges around wholes on the chassis and added some basic lables with a sharpie marker, just in case the amplifier is not simple enough to understand as is.
There are a few added features too, the 24V filament supply is seperate from the amplifier and has its own mains switch and power cord, so there is a 24V relay inside the amplifier that controls the mains power to the amplifier, meaning that the 24V supply has to be running to pre heat the 25EH5 filaments in order to turn the amplifier on. I also added a 315mA 250V fuse to one side of the HV secondary AC, and a really neat feature with the power supply setup that Gio created is that there is no on/off pop when the high voltage is turned on. Other than the changes said above, the power supply is the only section that I rewired to solve some noise problems and grounding problems.
I hope this to be encouraging news to Gio and good listening to all.
