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View Full Version : Sneak Peek of my current tube amp project - pt. 2

dividebytube
08-06-2008, 06:08 PM
Finished up the soldering last night - bought the right fuses today and gave it a listen. Surprise, Surprise - everything worked without any spark or smoke :thmbsp:

Basic circuit here - EF86 pentode RC coupled to an EL156 UL connected. Bias is adjustable so you can change the output tube to your liking. 6550 or KT88 can also be used.

Now I need to get the metalwork in for the other monoblock and solder it up.

Here is a short video of the amp:
http://www.youtube.com/watch?v=BDy_aGTU4cg

And a pic:
http://img222.imageshack.us/img222/1010/el1564uy7.jpg
clydeselsor
08-06-2008, 06:18 PM
Very cool!!
Kegger
08-06-2008, 06:21 PM
I like it, keep us updated!
dividebytube
08-06-2008, 06:48 PM
I should mention that it normally won't be mounted on the side - just this way for testing...
SpruceMoose
08-06-2008, 07:11 PM
i presume you wont be running minimus-7s later either... ;)

looks good!
Blackknight
08-06-2008, 10:50 PM
That's awesome. I'd like to build a tube amp but I don't even know where to start.
dividebytube
08-09-2008, 06:51 AM
picture of top with knobs, wood case -
http://img182.imageshack.us/img182/412/img1552rr8.jpg

now I just have to build another
bricktop
08-09-2008, 08:49 AM
Cool stuff! :thmbsp: Got a schematic? What transformers are you using?
dividebytube
08-09-2008, 10:27 AM
no schematic yet - it will be drawn up once I'm done tinkering with it. Output transformers are Hammond 1627SEA - nothing exotic, but they seem to do the job quite well considering their origin. One of the few lower priced transformers I could get that had a UL tap, could handle 100mA of current and had a good lower frequency response. They are BIG and can actually make some decent bass.