I do have some electronics experience but have never worked with tubes before, so if anyone has any suggestions or comments, I’d be extremely happy to hear them. I should be picking up the amp on Saturday and will post some photos once I’ve got it in my grubby little hands. There is plenty of extra space in the chassis, so I’ve got a bit of room to play around in the future and possibly do crazy things like adding a reverb tank… hmmm, scope creep much?Īnyway, I think that’s enough of a wall of text for a pictureless first post. So right now, I’m looking at using the this schematic and layout as the basis my amp, possibly making with a few mods. I emailed the guy asking for some more information and he directed me to a forum where he covered his whole build. It’s basically a Bandmaster pre-amp with a push/pull 6V6 power section and a switchable extra gain stage called the ‘trainwreck’ mod. So, the question then is… what to build in its place?Ī lot of people seem to turn them into plexis but I’m after Fender tones at the moment so was naturally excited when I found this. I’ll probably fire it up and poke around in it before I get started but I don’t think that I’ll ultimately use many of the existing components. I haven’t received the old amp yet, but I believe that it is still in working order. It has a beefy power transformer (I believe around 320-0-320V 100mA, 5V 3A, 6.3V 4A), a 20W output transformer used for push pull 6V6s in the original, a sizable chassis and a number or existing tube sockets. I still think this is a pretty cool idea and may come back to it some time.Īnyway, while trying to source transformers for this build I came across an old Hammond AO-44 on Facebook (a reverb amplifier from a 50s/60s organ), which would give me the transformers and chassis I need… well, one thing led to another and I was upsold to an OA-29, which was the main amp from the organ. I was even toying with the idea of putting together some kind of power plug on the power amp so that the pre-amps wouldn’t require any transformers. If the bug bit on the other hand I’d have a nice little platform that I could work off and I could then put together a number of little pre-amps and play around a bit. If I didn’t enjoy it, I’d leave it at that and my losses would be small. My initial plan was to start out small and build a simple, single ended 6V6 power amp, which I would initially drive off a Black Star tube pre-amp pedal that I have lying around. I started on the idea of building my own amp about a month ago when I realized that it would be easier to sneak a valve amp past the minister of finance as a project than as a purchase. I’m starting out on my first valve amplifier build and thought I’d keep a running project log here to share my joys and (inevitable) frustrations.
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