[1492] Notes from the Bench

Date: September 2nd, 2013 | Comments : [2] | Categories: DIY.

AMZ Cab-Sim pcb

Notes from the Bench

The postman just brought the proto pcb for a new project. It is a speaker cabinet simulator. I had made one previously but did not like the sound of it, so this is the revised version.

I want a simulator that does not have distortion… almost all of the commercial units have a distortion section that cannot be bypassed so that you just get the speaker cabinet. This unit will be very clean (it’s for recording) so distortion or overdrive will have to be added with a separate pedal.

Here is a tip for pedal building… look at the inside of the orange pedal in the picture below. Note that when this pedal was powdercoated, there was over-spray and the inside got a heavy dose of the coating.

This coating will insulate the jacks from making a good ground connection on the box, so it is necessary to file, sand or grind away the powdercoating from the areas where you want to make contact with the enclosure, such as around the holes for the jacks.

Save yourself some aggravation, and time spent troubleshooting by grinding off the coating.
AMZ orange box

The new power amp for my studio is below. I used a 1590DD cast aluminum box to hold the TA2024 amp pcb that I got on Ebay. The finish on the box was really rough and it took plenty of sanding and a couple of coats of etching primer to get a good smooth surface. Water-slide decals were used on the front and back.

The 15w output is plenty for my studio, and a class D amp will provide a clean sterile sound that I like for mixing.
AMZ TA2024 amp

Another project that I just completed was a mini-amp in a 1590A box for practicing. This tiny powerhouse can provide up to 5w, but 1w is closer to the practical power for a mostly clean output. I plan on plugging this into a 4×12 cabinet to see what it can do.
AMZ LM380 amp AMZ LM380 amp


2 Responses to “Notes from the Bench”

[5023] AL Says: 10:41 am, November 30th, 2013

Will you be offering the TA2024 amp for sell? Kit?

[5024] admin Says: 10:09 pm, November 30th, 2013

No, the TA2024 was made with a pre-built pc board that I bought on Ebay. There are lots of them available at quite low prices.

Just get a good linear 12v 2A wall adapter to power it.

regards, Jack


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