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= Introduction = ----- This is the (preliminairy) January 2005 Dutch Aleph-X Parts Group Purchase WIKI. >>>THIS WIKI IS FAR FROM COMPLETE, PLEASE AMEND, CORRECT AND COMPLETE!!!<<< The original thread that spawned this WIKI page can be found here: https://www.diyaudio.com/forums/showthread.php?s=&threadid=47145&perpage=10&pagenumber=1 The aim of this WIKI-page is to inventory the demands for parts group purchases for DIY-projects of building Aleph-X's and similar power amps. Although the name might suggest otherwise, this GP is open for all other audio DIY enthousiasts! Note: I (Byteboy) will not be organising any of these group purchases, I only volunteerd to set up the basic WIKI and maintain it for some time!! ---- = Parts (Preliminairy) = ---- At this moment a number of demands for parts have been identified: 1. Heatsinks 2. Power Transformers 3. Power Supply Caps 4. (Matched-)Power MOSFETs 5. (Matched-)IRF9610 6. Power Resistors = 1. Heatsinks = *At this moment it seems not feasable to order from a supplier outside of Europe (The Netherlands?) because of the high shipping cost due to the high weight and big size of the heatsinks?? - Preliminairy Specs ||Preliminary specs||Heatsinks|| ||Type||_____|| ||Construction||Aluminium, Extruded, Black anodisised, Vertical Fins|| ||Part Number||1234567QRS|| ||Brand/Manufacturer||__|| ||Suplier||__|| ||Price||__|| ||Weight||__|| ||Dimensions|| ||Fin Height||___mm.|| ||(Horizontal) Width||___mm.|| ||(Vertical) Lenght||___mm.|| ||Baseplate Thickness||___mm.|| ||Thermal Resistance||____°K/W|| t.b.s. = 2. Power Transformers (Preliminairy) = *I have been busy for some time searching for transformers for myself. I took the liberty of filling in this section myself to give an idea of what I think is how this WIKI should be filled. *From the posts in the thread I gather that there will be DIY-projects dealing with high- and with low power AlephX?'s (and alikes) and thus requiring different transformer power ratings. I suggest there will be two basic types of transformers to accomodate both? *Here is what I had spec'ed for myself so far: ||Preliminary specs||Power Transformer Aleph-X|| ||Type||Torodial transformer, Type XYZ|| ||Part Number||1234567XYZ|| ||Brand/Manufacturer||__|| ||Supplier||__|| ||Price||__|| ||Mounting||Semi-potted, central mounting hole, M6 * 60 mm.|| ||Weight||__|| ||Dimensions|| || ||Core cross section||__ * __ mm. ____mm²|| ||Height||___mm.|| ||Diameter||___mm.|| ||Power rating I||abt. 320-480 VA for "standard" Aleph-X|| ||Power rating II||abt. 720-1000 VA for "High Power" Aleph-X|| ||Regulation||max. 6 %|| ||Screen||Static screen between primairy an secondary windings|| ||Magnetic Shielding??||?? µ-Metal??|| ||Thermal Cutout||at __°C|| ||Primary voltages|| 2 * 120 Volts / 50/60 Hz|| ||Secondairy Voltages||2 * 16 ~ 24 Volts|| ||Secondairy Currents I||2 * 10 Ampere|| ||Secondairy Currents II||2 * 20 Ampere|| ||Ri I||___mOhm|| ||Ri II||___mOhm|| ||Wire Diameter Primairy Windings I||___mm.|| ||Wire Diameter Secondairy Windings II||___mm.|| ||Wire Leghts||___mm.|| = 3. Power Supply Caps = - Preliminary Specs for Power Supply Caps ||Preliminary specs||Power Supply Caps|| ||Type||Aluminium Electrolytic, Computer grade|| ||Part Number||123456ABC|| ||Brand/Manufacturer||__|| ||Supplier||__|| ||Price||__|| ||Operating Temperature Range||~ - 30 to +105°C|| ||Mounting||Stud mount, ~ M8 X 15 mm.|| ||Electrical Connections||Screw contacts ~ M5 X 10 mm.|| ||Capacity||10,000 - 22,000 µF|| ||Working Voltage||63 Volts|| ||ESR||___mOhm|| ||ESL||___µH|| ||Dimensions||~ 50 * 100 mm.|| = 4. (Matched-)Power MOSFETs = IRFP044N ?? IRFP240 ?? = 5. (Matched-)IRF9610 = t.b.s. = 6. Power Resistors = ---- = Inventory (Preliminairy) = ---- Please enter your particular interests in the different parts in the table below. From this information we can see if a GP is feasable for a particular part. Remember this is only to inventory the different demands for parts, no obligations yet. Inventory of demands for parts per participant of GP ||User||Country||Heatsinks||TrafoI||TrafoII||PwrCs||MOSFET||IRF9610||Pwr Res|| ||Byteboy||Netherlands||None||4||2||abt. 64*||None||abt. 50||80|| ||Jaac||Netherlands||__||__||__||__||__||__||__|| ||illusionxx||Germany||__||__||__||24||24||10||__|| ||jacco vermeulen||Netherlands||__||__||__||__||100||50||100|| ||MEnsing||Netherlands||__||__||__||__||50||20||__|| ||Creatre||Sweden||__||__||__||12||50||20||10|| ||Ruben||Switzerland||4||4||__||__||50||20||__|| ||Fepie||Italy||4||2||__||20||30||50||100|| ||__||__||__||__||__||__||__||__||__|| ||__||__||__||__||__||__||__||__||__|| ||__||__||__||__||__||__||__||__||__|| ||__||__||__||__||__||__||__||__||__|| ||__||__||__||__||__||__||__||__||__|| ||__||__||__||__||__||__||__||__||__|| ||Totals||__||4 - 8||8||2||100||304||180||190|| * Assumed caps are 22000µF/63Volts |