Tube Amp Archive

The amp is finished, please see the updated first post

Sam

After a first real day of work, here's where I am now. It made sense to me to ground the center pins of the noval sockets, not sure if they should stay that way or not though. Any recomendations of good speakers for this amp sub-£100, 12", 8 or 4 ohms? Bearing in mind I'm unlikely to ever run it com...

Ok small progress update. Turns out that the 47pF tonestack capacitor was supposed to be 470pF anyway and I'd just uploaded an earlier version of the schematic by mistake. My question now is that does the effect of breaking the ground path from the mid pot to defeat the tonestack also negate the DC ...

Thanks for the advice guys, very much appreciated. @tubeswell The main reason for wiring the transformers in this way was to take advantage of the spare transformer I had lying around. Right now I don't really have the disposable income for a new, higher rated transformer. For clarity, each OT is cu...

I'm resurecting this thread now that I've finally got round to getting on with this build. Incorperating some ideas confirmed in this thread over at SEwatt (http://www.sewatt.com/node/21015) I have come up with a new design utilisng a parralel single-ended output stage with two transformers. More th...

Ok, I will put back the 2k7 that I originally had there.

Thanks for your help.

When I asked about the design on ax84 I was given this piece of advice by steve25: "You could ditch the grid stopper also, as a 6v6 does not drive as easy as a EL84." If I need one then what value would you recommend. After having a look at valvewizard all I've established is that the tube's datashe...

Thanks for the help Alexo, it's very much appreciated. I've done away with R5 and R7 as you suggested but I’m keeping R6 for the moment so that I do not have to buy a new pot. I've incorporated the other changes you suggested as well as doing away with the needlessly overbuilt rectifier. Now I only ...

(Original post at SEWATT forums: http://www.sewatt.com/node/20552) Ever since I first saw the proverbial DIY light when building my first pedal (an MXR Distortion+), I’ve wanted to build an amp. Because of my circumstances, being 16 and so still living at home, the traditional single-ended low-watt...