11/27/2022 0 Comments Piezo preamplifier analog device ic![]() ![]() I want to locate my volume and EQ controls using more conventional style pots without having to compromise my design to incorporate a premanufactured preamp. Unfortunately, a 2" X 2" preamp module is not what I want on an instrument that I design from the beginning to be a solid body bass. I've used quite a few of these and for under $30 they work great as replacements for broken preamps and upgrades to intermediate quality acoustic guitars. Ebay is awash with inexpensive preamps designed to be installed into the side of an acoustic guitar. I'm not finding any premanufactured preamps that suit hand crafted instruments. The DAddario Taylor GS Mini Bass strings are essentially very fat classical guitar strings with a synthetic core. There is no flabby tone or intonation quirks that routinely occur with scale lengths under 30 inches. I've built short scale basses using a wide variety of available conventional electric bass guitar strings and nothing comes close to the intonation accuracy of these non-ferrous strings. The strings for the short scale basses do not have a ferrous component in their construction so a magnetic pickup will not function. The compression control on my Hartke bass amp makes this okay. The result is a wonderful little bass guitar and if I adjust the EQ on the preamp to cut the highs and mids, I have absolutely no complaints about the tonal capabilities other than the dynamic response is a bit harder to control and that is mainly the result of my playing ability. I'm using an economy piezo preamp unit purchased on ebay with a built-in tuner. ![]() I used DAddario strings designed for the Taylor GS Mini Bass (DAddario part# EXPPBB190GS). I made a new pickguard and installed a flat-top acoustic guitar style rosewood bridge with a piezo element under the saddle. I repaired the neck joint, tapered and plugged the six tuner holes, applied a veneer faceplate to the headstock, and drilled for 4 bass tuners. The most successful result is from an Epiphone SG that had a broken neck joint. In playing around with this idea, I've converted inexpensive manufactured solid body guitars which just happen to fall into my possession for little or no money. ![]() Generally, the goal is a scale length of around 25". This has resulted in a couple of interesting instruments with both positive and negative results. I've been experimenting with short scale basses using strings intended for the UBass and the Taylor GS Mini Bass. ![]() I'm looking for a proven and reliable schematic and parts list to build preamps. ![]()
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