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SCHEMATICS
 

    Here are a few schematics of projects that I have and am planning to acomplish. The ones that have been done and tested will be indicated by not having an asterisk beside them. I do not use integrated circuits in my projects because I generally get better results with discrete, but I will include a couple I have done in the near future.

HAVE FUN!!!
 

    6 watt Single Ended tube amplifier

    The Circuit in this schematic uses a 6SL7 and a 6L6GC purchased from Triode Electronics. The 6SL7's are I presume good used RCA (I forgot whether he said NOS or used, but they work great) and the 6L6GC's are Tesla/JJ electronic tubes. The trannies I used come from an old Montgomery Ward console stereo. But I recommend either One Electron or Hammond, gotten from Antique Electronic Supply, or any other brand you desire for the audio output transformers. I think that they may sound lots better than the ones I have, which sound pretty darned good for what they are! The power supply supplies 325 volts, and the resistor for each stage from the B+ to the pre-driver stage drops it to 290 volts each side. That is, each channel has its own dropping resistor and 40 microfarad filter cap. The pre-driver stage uses one half of the 6SL7 for amplification and the other half for cathode following/distortion reduction. The schematic shows a bypass capacitor for the 6L6, but I do not use it. Also, use a 150 ohm resistor from each leg of the filament supply to ground for hum reduction.
 

    18 Watt Push Pull tube amplifier*

    This amp is an attempt at reproducing my first tube amplifier, which uses a paraphase phase splitter. After analyzing the schematic, I have come to the conclusion that the second tube maintains the even harmonic distortion from the first tube, it being a unity gain circuit (the schematic at present does not show the feedback resistor from the capacitor after the plate back to its grid, but the input resistor is the same value as the feedback resistor, so this makes for a unity gain inverter stage), which is what made the original amp sound so sweet for a push pull amp. In other words, with two tubes giving the output tubes an abundance of even order distortion out of phase, they recombine in the push pull circuit to actually reinforce each other, as opposed to cancel out as most push pull circuits with most other phase splitters do. This is because the second stage driver takes the first stage's signal and inverts it, as opposed to having a single tube put out both at the same time while reducing the second harmonic to each output tube. That tube then also adds its own harmonic signature. Ahhh, sweet even order harmonics (or so it is believed)!

    RIAA Phono Tube Pre-amplifier

    RIAA phono "Solid State Tube" Pre-amplifier

    Tube line amplifier*

    "Solid State Tube" line amplifier

    "Solid State Tube" Power amplifier Version 1*

    "Solid State Tube" Power amplifier Version 2*

    Power Supply for SE amp (solid state. Sorry)

    Power supply for Push Pull tube amp

    Power suply for solid state power amps

    Power supply for line and RIAA pre-amps