5/16/2023 0 Comments Musicmaster bass amp schematic![]() In fact, there's even an old saying in the technician community that goes "A 10 dollar transistor will blow up in order to protect a 50 cent fuse every time." D One of Murphy's Laws, believe me. But truth to tell, they're still too bleeping slow to protect expensive output transistors. So where do we use a Fast-Blow fuse? Easy, in most non-tube circuits. The timing of this isn't mission critical, but during the manufacturing process, the tolerances are held pretty close. ![]() When the initial rush is over, the fuse has to be able to tell when a warmed-up amp is misbehaving, and it needs to blow now, not after a few seconds. Yeah, the fuse was designed just for that reason, with that time element in mind. How long is that time? Interestingly enough, about the same amount as it takes the filaments to settle down to normal current draw. Why? Because it does not blow at the rated current draw until that draw exceeds a certain amount of time. To guard against blowing a fuse during that large initial flow of electrons, we use a Slo-Blow fuse. As things warm up (in a second or three), the demand slacks off until it reaches the normal current draw. But the Musicmaster Bass didnt set the world on fire with its thin sound. The 30' scale was handy for guitarists who occasionally covered on bass. Power output: 12 watts, RMS, 26 watts peak music power. Since they are cold, their collective resistance is low, thus the larger-than-normal demand for current. A low priced combo feauturing an easy to play 'Fender Bass' and a rugged 'Fender Bass Amp.' Easy playing 30' scale adjustable neck. When you first turn on a tube device, there is an inrush of current that is trying to heat up the filaments of each tube. Why MM didn't do the normal thing in the first place is beyond me, but here we are, so we're gonna make the best of it, right?įor general information, here's the answer to your question. If you want to move it to the back panel of the chassis, I encourage you to do so, I've done it often for my customers, and I don't believe there is any downside to doing this. If you open your amp up, you'll find the fuse is sitting in a clip style holder on the printed circuit board. ![]() Laws are in place at many stages along the manufacturing path that work to ensure the safety of a moderately functional human being who might purchase said amplifier, let alone any other device that uses electrical power in any fashion.īut fortunately for you, that's not what you're dealing with here. ![]() The deal is, either MusicMan did not put out an amplifier for sale, or else they had a UL rating or listing. Make no mistake, this is a field whereof I speak from more than a little experience. ![]()
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