music, guitars & other obsessions

Summer Project Galore!

DIY fever!! Can’t stop thinking about all these cool projects on diyaudio, diystompboxes, ax84, 18Watt, etc. I need to get better organized with multiple projects going on, let’s see now:

Speaker Projects:

OB (Open Baffle) – prototype is done, sounds pretty good already with only may be 50 hours of play so far, will ask the carpenter to get the plywood and hardware ready for finished speaker.

Frugel-Horn Mk3- the Mark Audio drivers are unfortunately in the States still, Edwin will bring them back after the summer, so on the back burner for now…

Constant Directivity
I ordered the drivers and CD horn, the drivers got here, but the horns are still back at my friend’s house in the US, so it will be a project for late 2011, can’t do much for now…

Guitar Amp Projects:

Finished Fender 5F2-A mod, need to put it in a decent head cabinet, will get the carpenter to do it at the same time as the OB speaker cabinet, need to order some grill and front face plate to dress it up.

Test bed for tube amp, all the parts are here just need to spend sometime to put it all together, should be done by this weekend.

Need to decide the next amp build for bread-boarding, probably still stay with SE design this time around, may be a higher gain model like the AX84 SEL.


There are so many options, I put together a shopping list, including most of the commonly used passive parts, IC’s, transistors, switches, jacks and pedal cases. Need to decide which pedals to build, some candidates include: LPB2, Lovetone Brown Source, Mr. Skyripper, Shin-I Companion, OLCcircuit Eclipse Valve, Parallel Universe, BISAB, Cream Pie, DOD 250 (MXR Distortion+), Digitech Space Station. Some of the above are not beginner projects, so I will start with some real simple ones like the DOD 250.

Here is the basic steps, to get myself organized:

1. Decide which pedals to build;
2. Setup a test bench, basically just a pre-made bread-board, 9V power supply, and some connectors to get started;
3. put the parts on the bread-board, wire and test, listen, tweak, listen, etc.
4. put the finalized design on pref-board, prepare the wires for final assembly;
5. use DIYLOC/CAD to do parts layout, prepare template for drilling holes in the chassis (may be standardize the locations of the input, output and power jacks, so the layout could be re-used);
6. prepare the chassis for graphic transfer – sand, clean, fine sanding, make sure the surface is super smooth, so the graphic will stick properly;
7. find the right graphic for the box, transfer, glue or etch the images onto the boxs, trim the edges off, paint with light varnish several times, let dry and finish up with heavy car wax, mount the hardware onto the box and go for a test drive!
8. future to do – make my own PCBs, doesn’t really look that difficult…


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