Tube Amp Archive

I used a bridge rectifier, small one, but 1N4001-7 can of course be used. I put the parts on a stripboard/veroboard/prototyping board and tried to make it as compact as possible and using an 8-pin socket for the IC, in case I need to replace it. I used metal film resistors 1/4W and PCB mounting (rad...

Ur welcome Phil, by the way the minus on the rectifier should also be connected to ground. Forgot that on the schematic. I use a Bell & Howell speaker from 1952, with this amp. Sounds very bright but in a pleasent way, as I imagine the old American amps would have sounded like. The 6SJ7, is very mic...

The two 2M2 resistors are for setting up bias to the first op-amp and the two 10k are for the second. The first op-amp is a buffer with a gain of one. Check out the full schematic for PSU details.

Phil, I used a separate 12,6 volt winding on my PT to a diode bridge, and then after smoothing to a 15 volt regulator and a 5 volt regulator. The 5 volt must be regulated and the power to op amp should also be, this to minimize hum. Maybe you can install an auxillary transformer to get the voltages,...

I have installed a Belton reverb brick in a newbuild and it Works very well. It taps off the signal from the volume pots wiper and inserts it back into the second grid of the phase inverter. The Associated Components is a high impedance buffer (dual op-amp) and an amp that gives 5 to 10 times gain, ...

Hi, I had a very similar oscillation with the output stage of a 57' De Luxe reissue. The tubes was (just installed) NOS RCA 6V6s. I changed one tube to another NOS RCA 6V6 and the problem went away. First time I built an amp with 4 EL84s I foolishly put the grid stoppers on the turret board and disc...