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= CLOSED = = Info Section = === Copyright Nelson Pass === He takes all the credit if you like the circuit - and I must agree with him it sounds terrific. ;) The GB has been approved by Nelson Pass. I have made a little guide, to keep useful info one place: https://viller.eu/audio/2009jan_gbf5/gbf5_guide.pdf I'll update it if someone thinks it needs additional sections/info/trick descriptions. === Ordering Info === Prices are: Two F5 boards for one stereo set : $15 or 11euro One PSU board for stereo set: $15 or 11euro Postage: $10 or 7.5euro Please use my site for ordering: https://viller.eu/gb/ === F5 Boards === The board is 10x5 cm and the mosfets are placed 8 cm apart. https://www.diyaudio.com/forums/showthread.php?postid=1687317#post1687317 === PSU Boards === These boards will be 18x8 cm and capable of holding 35mm diameter snap-ins. https://www.diyaudio.com/forums/showthread.php?postid=1687351#post1687351 == Got a question about components for the PSU (Post #104) == The layout I have made here is for the standard firstwatt style psu. So you'll need: Onboard: 8 x snap in caps (at least 25V and 15mF more is better) 8 x 0.47 ohm 3W resistors 2 x 2.2k 3W resistors (for discharging caps) Off board / somewhere else: 2 diode bridges mounted somewhere on the chassis 1 toroid 2x18 300VA 1-2 thermistors for soft starting the toroid switches, connectors, fuses and all that stuff This will be enough for a stereo amp or a monoblock, but remember diy people always want to go over the top. === PCB Process === || Layers || Two layers || || Copper || 70um || || Color || Blue || |