![]() I gig miced up so I bet this will sound awesome with a Strat or SG, my homemade Bluesbreaker pedal, with the amp's tone on 5 and volume up around 7. Here are some hastily taken shots on my ancient Mavica thrown up on Photobucket. Basically, the story told to me by the seller looks to be 100% correct by the look of the amp in person. ![]() Grill is flawless with just the slightest of normal darkening with age (as it should be IMHO). Handle is pristine and all the hardware is dead mint. Faceplate is perfect with maybe 4 scratches from plug inserts and not a single mark anywhere on the printing anywhere. Tolex looks like it's never been touched with just the slightest of lifting on a couple edges in back - probably just from age since there's no fraying to be seen anywhere at all. "Hey - first one's on me!"Īll original looking right down to the Fender labeled tubes & 15" speaker. He was thrilled to learn that I play in a gigging band and his amp will see stage time as a result of the sale. He said it sounds great but he never really learned to use it so someone else should put it to it's intended use. I drove the 40 miles to his place out in the country and bought it for cash on the spot without even plugging it in. He bought it to learn to play guitar brand new years ago but never did figure out how to play guitar so it's sat in a closet "for years". Guy calls me back and says it works fine but has sat in the closet pretty much since new. The post was about an hour old and I figured it was probably already gone but what the hell. I hit reply & sent a message simply stating "I'll take it" as well as leaving voice mail on both phone numbers listed in the ad. On a whim, I hit the local CL to see what was posted this morning.ĭay-um!!! A SF Musicmaster Bass amp for $100?! I took a personal day off to get some things done like hitting the DMV for replacement plates (oh boy), bank stuff and other errands I never seem to have time for. Pulling up a few schematics of an interstage transformer in action on Google shows that middle leg just simply grounded, same as the cathodes on the 6V6's would be in a fixed bias configuration.I work 6 days/week every week + play in the band + do some web design work on the side so I don't get a lot of time to myself. The only thing I'm trying to figure out, and can't resolve in my head, is how to integrate it with the interstage transformer (phase inverter), as the middle leg on the secondary of that transformer is tied into the circuit that ties the cathode to ground. I've been looking at Princeton schematics, and even though they use a tube rectifier, it seems I could simply pull the bias supply off of the PT before one of the rectifier diodes and then copy the Princeton design. I may or may not do a Tweed or Brown tonestack mod on it. The amp as it sits right now is set to be built very close to stock except for the beefed up transformers (and it'll get a seriously upgraded speaker). I'm wondering if going with fixed bias will tighten it up further. Not big volume, just closer to the sound of the bigger Fender amps. I'm still chasing the idea of "Big Fender" sound in a little Fender package. MuchXS may have done this on purpose to better space out the components on the board. ![]() If I hadn't done that, the diodes would've been at a weird angle. The two center connections on the board ended up being offset by "one" (relative to the outer rows), but there ended up being an extra row, length-wise, down the length of the board, so I just shifted everything over by one at that point. You'll notice a blank spot in the center. I've decided to go with the Allen TO-20B OT and Hammond 290CAX PT.Īnyway. I'm mainly concerned about heat and don't want anything to fail once the amp is together and fired up. It seems that it cuts bass and most folks snip it out and replace it with a jumper anyway.Ĭould someone tell me if my component placement looks ok? I'm particularly curious about whether the components near the input end of the board look ok, as far as being so close together. 005uf cap coming off of the 68k input resistors. Those familiar with this amp will notice that I've omitted the. I've got all the components mocked up on the board, but I haven't soldered anything in place yet. ![]() MuchXS provided a new circuit board that was a slight departure from stock in that it was a little longer and had provisions for the filter caps to be mounted on the board rather than hang off the end. The board and transformers (minus the phase inverter) were all gone. Recently, I decided to make it whole again and sought out, and found, a stripped MMB chassis on eBay for around $40. I got the MMB cabinet years ago and installed my Vibro Champ chassis in it. ![]() I just started work on rebuilding a Fender Musicmaster Bass amp. ![]()
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