I picked up a partially assembled 30 watt (4 EL84) class a amp loosely based on the tube rectified circuit of a DC30. The amp has hammond transformers (which I guess are okay - I'm sure there are better). I had to finish up soldering some of the components and some of the tubes. I'm not sure exactly what I was doing - I just followed the directions I was given. When I first powered the amp up I was pretty much scared to death but it all worked just fine. The amp is very chimey with single coils but I like it best with HB's - the controls are volume, treb, bass and presence - the EQ controls are very interactive - crank them both up and the amp really crunches, the presence really doesn't seem to do all that much. There's a tube effects loop but I haven't tried it out, there's no mix control so I'm not sure how it will turn out. I put together a cabinet with spare Pine and plywood - the tolex was left over from a cabinet recover I did a few years back, I didn't have enough to go all the way around so I had to do some patching. I used a reverend alltone 12" speaker I've had sitting around for a couple of years - I'm very surprised at how it sounds. I replaced the rectifier tube and the EF86 tubes with some Mullards I had from another project. All told I've got about $200 into the amp. I still have some finishing to do - which I'll probably never get to!
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