In some older Fender amps, the presence pot actually can have a low dc voltage on it - I mean the pot itself. So I think in practice, the only significant risk is that they break eventually, if wired according to regulations. K & F (Kauffman & Fender) 1x8 Combo 1x10 Combo Musicmaster Bass CFA-7010 PA Heads PA100 PA100 w/ rev sw PA135 PA Horn Crossover Princeton Woodie 5B2 5C2 5D2 5E2 5F2 5F2-A 6G2 6G2-A AA964 CBS Princeton Princeton Reverb AA1164 (GZ34) AA1164 (5U4GB) B1270 78-79 Vol/Boost Princeton Rev II Pro Woodie Pro 1946 5A5 5B5 5C5 5D5 5E5 5E5-A 5E5-B 5G5 6G5. And finally, they have to pass stringent official tests to be able to be used in this application in a production amp like a Fender. They are made as separate units, which then get attached mechanically to the volume pot, and which will have thick plastic sides, thicker than any high voltage wire in the amp. They should be wired only to the neutral side of the mains, which theoretically is at zero volts, or near that - what the switch does is just complete the 'on' circuit. Includes detailed diagrams for the following instruments: Fender factory recommendations for capacitor and pot. As was mentioned earlier, this is a bit of a safety concern.I'm not crazy about them myself- but I think it's intuitive, rather than rational. I myself, am not wild about on and off switches for high voltage circuits being from the volume knob. As was mentioned earlier, this is a bit of a safety concern.ģ. Be prepared to do some searching for replacements, and if you want NOS, spending even more than what used sweep tubes normally go for.ģ. So replacements are more difficult to find than 6L6s, 6V6s, E元4/6CA7s, etc., and can be pretty expensive (a few years ago, I spent over $90 for a pair of USED 6KD6s, that looked, to be in OK shape, so I'd have a set up backup final/power tubes for a 46 year old Yaesu FTdx-401b ham radio I have, that puts out about 300 watts of power). The lead volume cuts bass in a smooth way because the bleed mod has the resistor in parallel. Rhythm: simple treble bleed mod with just the. Fender Schematics - Click here: Schematics. 88-92 obsolescing, 121 official wiring diagram, 89 fig pickups on. Unfortunately, ALL sweep tubes are extinct nowadays - they haven't been made in decades. Lead: 500K volume pot (1 meg parallel resistor), duncan style treble bleed mod with. 9 Fender Electric Instrument Company ( continued ) catalogs 1947, 32. Sweep tubes were originally developed to help run the sweep circuits for TV picture tubes, but were discovered to work fine as power tubes (with certain restrictions needing to be kept in mind - they don't tolerate being out of resonance/tune in radio application ), and due to their low cost (you used be able to pick up replacements cheeep at your neighborhood drugstore), were used in some amplifier circuits. Oh yeah, and don't expect super loud - the amps put out 12 watts of power.Ģ As was mentioned, the earlier versions of the Musicmaster Bass amp use 6AQ5 tubes. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. These original pieces of paperwork came from an early. In a way, they're almost like a poor man's Tweed Bassman. Fender Amp Schematics to assist you with your amplifier repairs and modifications. Up for sale is this vintage early 1970s Fender MusicMaster replacement parts list and wiring diagram. Guitar Fender Deluxe Players Strat Wiring Diagram. Also learn where you can get the complete. View and Download Fender Musicmaster Bass owners manual online. They can get pretty dirty sounding, when turned up. Even if you dont have a Fender or Gibson, this guide will teach you how to wire a guitar with 1, 2, or 3 pickups. If you want squeaky clean sound, a Musicmaster Bass amp isn't for you.
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