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Normally I would have just bought some aluminum boxes but the prices are ridiculous, and I did not have a finger break to make my own. Having no real metal brake, I had to improvise. and the results were better than I had hoped for. So here is what we did: Requirements: figure 1. First bends figure 2. After clean up. 3 pieces of square steel tubing 2 of them about 1 foot, the other maybe about 2 feet. Optional 2 1/2"x20 blots about 3" long and nuts. Large deep through vice. Muscle Deme ...
Back to Analog Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   I still have work to do on my Kelvin (4-wire) Milliohm Meter project, one item of which is to improve the accuracy of the meter when measuring below 3 milliohms.  I suspect the problem may be that the instrument amp is too close to the ground rail.  To correct this I ordered a LM2662 which is a C ...
dougw

Tube Amp on a PCB

Posted by dougw Top Member Nov 26, 2018
Back to Analog Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Long, long ago in a far away place outside of the box, I was challenged to build a tube amp to explore the sound of tubes clipping. The idea was to make a tube amp that could clip at low volume so we didn't have to wake up the neighborhood to explore what what various amounts of clipping sounded like. I wa ...
Back to Analog Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Well, Christmas or Hanukkah came early this year! These parts are what I call almost unobtainium! I wish to thank Tariq and the E-14 family for this dotation. Whoopie! Now to just get this thing built and tested. Fins!   Back to the Monthly Index ...
Back to Analog Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   As you all know I have been stripping a SONY Cassette Player/Recorder TC-188SD. After stripping I still have tons of room to stuff my 3 toroids,  power supply, 6 relays, Caps, 4x 12AX7, in nice colored shields, a TI MSP430 for control, and a partridge in the pear tree.  I had some four-inch wide ...
Back to Analog Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Well, at last, I found my donor, a SONY TC-188SD Cassette Player. The cassette door will be clear plexiglass so can see the tubes glow. If I can get the parts, I will have a rather unique power supply that you only see in very exotic stuff. There are three transformers 1 for the heaters with dual 12vac o ...
phoenixcomm

RIAA Pre Amp

Posted by phoenixcomm Top Member Nov 5, 2018
Times are a changing! I just ordered 4 ciramic tube sockets and 4 shield sets ( two in blue, and two in red ). I was asked why the two colors? "Because I can." Was my answer hey right and left chanels. I have a older Sony cassette player, I think it will hold all of the crap, and the hole where transport door is, I will mount a little plexeglass, nice to see the things glow. But an led will help. My biggest setback are tubes 12AX7 (about $20.00 each, and the transformer (smallish) with 12vac at ...