Tube Amp Archive

Hello Everybody: That new Jenson speaker really done the trick. All of that dirty sound is gone. I have been using my prototype tube amplifier on my computer sound card for some time now. To me it sounds better then the big sub woofer speakers I bought from Amazon 5 years ago. I didn't know how much...

Gentlemen: Here in Texas the right hand side of the wall socket is the black or hot wire, the left side or white wire is the ground return. The green third wire is the ground safety wire. That one is soldered to the chassis to prevent a shock hazzard. This first amp is going to my daughter who has s...

That's what I thought, then there should be no reason a car stereo speaker wouldn't give satisfactory performance on a tube amplifier. Since both of these Wal Mart speakers had the same problem I can only conclude this is a design fault. I lost my 20/200 eyesight in 87 and couldn't read schematics a...

Hello Everybody I got my new Jenson 6 inch speaker today and installed it in the wooden speaker box. My Slim Dusty files never sounded so good. Bright and clear. Can someone explain to me what the difference is between the 8 ohm signal from a car stereo and the 8 ohm signal from the secondary windin...

Transcribed schematic Since I am blind I can't draw you a schematic. This is the best I can do. Let's start with the power supply. The transformer is a replacement for the Fender Bronco, Champ, Princeton, Princeton Reverb, Vibro Champ The transformer is made for 120 volts AC and the primary leads ar...

Folks I tryed my earphones on my prototype amp and the sound is just as clear as my store bought speakers. This dirty sound must be this Wal Mart speaker! I have never encountered anything like this before. How can Wal Mart get away withselling something like this or is this fuzzy sound not noticed ...

I have tried to post a sound but somehow it doesn't work for me. What I'm running is a number 42 output tube which is the older version of the 6F6 which was widely used in table radios. I'm running the tube at .027 milliamps cathode current at 230 plate volts .027*230=6.31 watts. and I don't run it ...

Fuzzy sound: I have Substituted different 12AX7 pre amp tubes, the 6C6 driver tube and the 42 power output tube and several bypass and coupling capacitors and tried a different output transformer with a 10K ohm impedance winding all to no avail. I still have this fuzzy sound. Not much, just enough ...

Hello Stevem: I wish I could talk with you or someone on the phone. It was Philip Davis that set the account up for me, I couldn't do it. I put a letter on the site yesterday and when I looked this morning it was gone, Don't know what happened to it. Thank you for posting the pictures, I didn't know...

Yes, I can have my sighted room mate take a picture of the amp but what good will that do? It's like looking down the berrall of a gun to see why it didn't fire! The amp is built on a open breadboard so I can get at and change parts around. It's on the computer and serving as an working amp for my s...

Yes gentleman, I am blind and yes I did build a prototype of a tube amp on a breadboard by feeling the parts. I have a talking volt/ohm/amp meter and screen reading software on my computer. I'm using the prototype amp on the computer as I write this. The tube sockets are mounted in a upright piece o...

Hello Everybody: I'm new on a forum never having to do this before. I have built a prototype of a two tube amp on a open breadboard. I'm using antique tubes like the 6C6 and the 42. I'm getting a fuzzy sound like a little Distortion, not much but just enough to sound dirty. To me it sounds like it's...