![]() unit shipped with either an OC44 or OC71 black glass germanium transistor. Please note that sale on this kit is final and I can’t accept returns.īuilding a MKI in this style is not easy, but is a very cool project ending with a great pedal when all is said and done. » My Tube/Semi » OC70 You reach this tube or valve page from a search after clicking the 'tubes' tab or by clicking a tube on a radio model page. These old germanium transistors becoming more rare, the prices for the mojo. Amperex black glass version date code 6 P H. These transistors are useful in the fuzz type/rangemaster/tonebender circuits, and these sound as good if not better than the NKT-275 red dot transistor. These are old parts sourced over years, but each piece has been tested and verified as working. Description Reviews (0) Description NOS Amperex Holland 2N280/OC71/CV7005 (circa 1956) germanium transistors. I can provide the schematic I use as well as a layout guide and a guide I use to drill the paxolin board, but can’t provide build support. Again, you’ll still have to source easy to find parts. There are also two Q2 biasing resistors-470K and 180K-to use to taste. There are two unobtanium mojo 0.01uF caps-a Hunts and an Iskra-for stylistic choice. I’ve listed everything with quantities in parentheses. ![]() I’ve added a couple of additional parts to give you options. This is a great set if you’re looking to have a wide selection for building a variety of fuzz boxes. Incidently, you could convert the OC71 to an OCP71 (photo-transistor) by. These were mounted in a black-painted glass case. It requires a large stash and a lot of work to find a set. i got 100pcs of mullard germanium transistors (mostly oc76 but some others). English: OC71, an early germanium PNP bipolar junction transistor. It’s notoriously difficult to get a trio of transistors that play well together in this circuit. The transistors have been meticulously matched and tested in circuit. It is not everything you need-you’ll still need an enclosure, wire, pots, a switch, jacks, etc-but it’s the stuff that is very difficult to come by. ![]() The set includes some very rare mojo parts. This is a set of transistors, capacitors, and resistors to build a replica MKI Tonebender in the style of Sola Sound/DAM/Pigdog/Jerms.
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