COMPLETE Project/One Mark III B Amp Boards Rebuild Kit Repair Set w/ Transistors
Specifications
| Return Shipping Will Be Paid By | Buyer |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Refund Will Be Given As | Money Back |
| Model | Mark III B |
| Brand | Project/One |
Up for sale here is this amplifier board rebuild & repair kit for a Project/One Mark III B receiver. This is all the parts you need to rebuild BOTH Project/One Mark III B amplifier boards, so you only need to buy ONE kit. Over time the amp boards start developing issues with transistors and capacitors, and sometimes completely blow up. The old parts are weak and failing. We will make them new again! This is a complete kit--it includes all 10 capacitors (replacements for all the electrolytic capacitors, 12 transistors (replacements for all the transistors on the board, 4 trimmers, and 4 new emitter resistors. It does NOT include any other resistors or any output transistors. The correct replacement output transistors are MJ21195G (replaces Hirel 649, on bottom) and MJ21196G (replaces Hirel 218, on top), available here. Please don't buy any of the fake Chinese transistors on eBay--those are counterfeit and will blow up. This kit will completely rebuild both of your amp boards, whether they are working or not. These are all high-quality brand new genuine parts. The capacitors are Nichicon PW, Panasonic FC, and Wima film caps at the correct uf and the same or higher voltage ratings, and the transistors are Fairchild/Onsemi and are the correct subs for the original transistors. These are extremely high-quality parts, and they are what I use when I rebuild vintage gear. Frankly, "recapping" is a waste of time if you're not going to replace the transistors as well. A lot of times the transistors age worse than the caps, so you should definitely change out the transistors while you're in there. If you're having amp board issues, it's very likely to be a transistor issue. I will include an extremely specific instruction sheet designed to walk you through this, but this is a pretty complicated repair, so if you don't have much experience with this, buy the kit and take it to a professional. You should definitely have a fair amount of soldering experience and have a decent soldering iron, a dim-bulb tester, and heat-sink compound, as well as the usual tools. This kit may not fix your Project/One if it has other issues, but it will definitely help it run better, and should fix most amp board problems. Please see my pictures for details. US shipping and handling is $5, and international is $18, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask. Looking for more parts? I have power switches, feet, pushbuttons, top case screws, bottom screws, faceplate screws, white LED fuse lamps, blue LED fuse lamps, 6.3v bi-pin bulbs, 8v bi-pin bulbs, 12v bi-pin bulbs, wired 8v 60ma bulbs, new power cords, new main capacitors for the Marantz 1060/2230, wired Pioneer speaker plug replacements, new 630v yellow film capacitors at 38 different values, new 1200v yellow film capacitors at 15 values, a large variety of transistors for vintage stereo repair, new Wima film capacitors for stereo repair, new 250v yellow film crossover capacitors, and more. Just use "add to cart" on everything you want and then check out for combined shipping.
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