headinclouds Posted July 25, 2013 Report Posted July 25, 2013 About 3 weeks to arrival in UK from Poland, obviously probably longer to your destinationCheers Quote
headinclouds Posted July 25, 2013 Report Posted July 25, 2013 I've just looked up his audio grade description:In audio grade, noiseless transformer price You'll get transformer wound on high inductive, selected and measured core. Core and all the windings will be impregnated. Transformer will also has electric and electromagnetic shields, epoxy filled interior and mounting pads in price.Shipping cost to UK - 19,00 EUR/package up to 30kg. (1pc 100VA's = 1,4kg)Payment via bank transfer or PayPal.Production and delivery in ~18-24 days . Quote
shipsupt Posted July 28, 2013 Report Posted July 28, 2013 Just finishing up my amp boards. I wanted to confirm that these two locations are to be left empty? Quote
wink Posted July 28, 2013 Report Posted July 28, 2013 Those are links connecting tracks on the other side of the board.Yes, leave them alone. Quote
spritzer Posted July 28, 2013 Report Posted July 28, 2013 First KGSSHVk up and running... This is a 450V version and sound bloody good... Quote
headinclouds Posted July 28, 2013 Report Posted July 28, 2013 (edited) That's nice, looks smaller - to save me working it out what size case is that again? Edited July 28, 2013 by headinclouds Quote
chiguy Posted July 29, 2013 Report Posted July 29, 2013 Just curious, has anyone put together a BOM for the KGSSHV mini PSU? I've been looking at semiconductors so far. I've been looking at this BOM and am noticing different semiconductors compared to the latest version of the mini psu, https://docs.google.com/spreadsheet/ccc?key=0AnqARwsQ1QV7dG44Z2lZUnAwN3B0VE1Ub2xhLXN2U2c&hl=en_US#gid=0 What I have so far for semiconductors. I'm not sure if all of these are suitable however. 4x 2N3904 http://www.mouser.com/ProductDetail/Central-Semiconductor/2N3904/?qs=sGAEpiMZZMshyDBzk1%2fWiw99kSkYzPxmf7NzGOknJzA%3d 4x FQPF8N80C http://www.mouser.com/Search/ProductDetail.aspx?R=FQPF8N80Cvirtualkey51210000virtualkey512-FQPF8N80C 3x IXCP10M90S http://www.mouser.com/Search/ProductDetail.aspx?R=IXCP10M90Svirtualkey65120000virtualkey747-IXCP10M90S 6x 2sa1486 4x KSC5026M http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/KSC5026MOS/?qs=%2fha2pyFadugoJzb5kdHGb1mz%252bVf84Up2OEtCwNu0mTI%3d 2x LT1021-10 http://www.digikey.com/product-detail/en/LT1021DCN8-10%23PBF/LT1021DCN8-10%23PBF-ND/891397 8x STTH512FB http://www.mouser.com/Search/ProductDetail.aspx?qs=8M15sSGRUn9rlB8mv3qAqw%3d%3d 1x 7815 http://www.mouser.com/Search/ProductDetail.aspx?qs=VOMQJJE%252bBNmeOJuT6KI25w%3d%3d 1x 7915 http://www.mouser.com/Search/ProductDetail.aspx?qs=%252b9%2fcbd0IE0T0iTVdYUTt3Q%3d%3d Quote
eggil Posted July 29, 2013 Report Posted July 29, 2013 First KGSSHVk up and running... Is it me or Spritzer just said a bad word? Quote
palchiu Posted July 29, 2013 Report Posted July 29, 2013 Just curious, has anyone put together a BOM for the KGSSHV mini PSU? Tran told: ksc5026 and ksa1156, instead of the 2sc3840 and 2sa1486. There's more parts need for mini PSU. 2x 2K resistor, 2x 270V zener, 2x 24V zener. (You may check schematic and pcb, Dr.Gilmore has posted them.) +/- 15V capacitors size has been changed. 2x 3300uF and 2x 330uF, dimeter/pitch are 16mm/7.5mm and 10mm/3.5mm. 78/7915 don't need heatsink. Quote
Lil Knight Posted July 29, 2013 Report Posted July 29, 2013 (edited) You need to use 270v zener if opting for the ksc and ksa. Also, total of diode strings is 500v for 450vdc and 550v for 500vdc output. Edited July 29, 2013 by Lil Knight Quote
palchiu Posted July 29, 2013 Report Posted July 29, 2013 You need to use 270v zener if opting for the ksc and ksa. Also, total of diode strings is 500v for 450vdc and 550v for 500vdc output. Dear Tran, Need remove 270V zener if with 2SA1486/2SC3840? Thanks! Pal Quote
Lil Knight Posted July 29, 2013 Report Posted July 29, 2013 If you are using the 2sa1486, then no 270v zeners. Quote
palchiu Posted July 29, 2013 Report Posted July 29, 2013 If you are using the 2sa1486, then no 270v zeners. Thank you! Pal Quote
spritzer Posted July 29, 2013 Report Posted July 29, 2013 You need to jumper the 270V zeners, not just leave them out. The Vishay 0 ohm "resistors" are good for this. Wire also works but insulation would be nice. Is it me or Spritzer just said a bad word? Wouldn't be the first time just this past minute... Quote
palchiu Posted July 30, 2013 Report Posted July 30, 2013 You need to jumper the 270V zeners, not just leave them out. The Vishay 0 ohm "resistors" are good for this. Wire also works but insulation would be nice. spritzer, thanks for your comments. Quote
palchiu Posted July 31, 2013 Report Posted July 31, 2013 Got the heat sinks in today. Here's how it's going to lay out... Just wonder if Kerry may make them tighter, and put them in chassis like densen's amp will looking cool . Quote
Lil Knight Posted July 31, 2013 Report Posted July 31, 2013 Latest BOM: http://tee8tee4388.blogspot.com/2013/07/kgsshv-amplifier.html Quote
spritzer Posted July 31, 2013 Report Posted July 31, 2013 We could also make the options a bit clearer with a picture of the boards and what should be populated for +/-500V, +/-450V, global feedback only, no servo etc. Quote
kevin gilmore Posted July 31, 2013 Author Report Posted July 31, 2013 You need to jumper the 270V zeners, not just leave them out. NO. The 270 volt zener is to protect the 400v pnp transistor. if that is the one you are using. you can leave it in circuit for the 600v transistor. you short it out for the simpler version of the power supply. Quote
spritzer Posted July 31, 2013 Report Posted July 31, 2013 (edited) Ahh yes, better leave them in then. Been spending too much time lately walking people though the simplified PSU... Edited July 31, 2013 by spritzer Quote
Pororo Posted July 31, 2013 Report Posted July 31, 2013 If using a matched pair 2SK170 rather than LSK389, should the pair be thermally coupled? If so, is thermal grease and shrink wrap sufficient (assuming they are close enough on the board)? Quote
kevin gilmore Posted July 31, 2013 Author Report Posted July 31, 2013 thermal epoxy is the best. otherwise a drop of thermal grease and cable tie or similar Quote
palchiu Posted August 1, 2013 Report Posted August 1, 2013 NO. The 270 volt zener is to protect the 400v pnp transistor. if that is the one you are using. you can leave it in circuit for the 600v transistor. you short it out for the simpler version of the power supply. Doc, many thanks! Quote
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