kevin gilmore Posted October 2, 2012 Author Report Posted October 2, 2012 in the third stage, if you are using the 2sa1968's, to increase the current decrease R8 and R9. Probably the lowest you can go and still get it to balance is 400 ohms. if you are using the ixys parts decrease the values of R12,R19 for the output stage, to increase current decrease the values of R6 and R5 probably not lower than 125 ohms.
eggil Posted October 3, 2012 Report Posted October 3, 2012 (edited) Just started the on board build today. Not in a hurry since I already have one but did not have the patience to wait for the Megatron Edited October 3, 2012 by eggil
eggil Posted October 8, 2012 Report Posted October 8, 2012 This is nothing groundbreaking but if you have an iPad, you can use the free app You Doodle to mark the components as you stuff them.
cobra_kai Posted October 8, 2012 Report Posted October 8, 2012 Or you could print out a copy and use a pen
deepak Posted October 9, 2012 Report Posted October 9, 2012 Until it gets solder on it.... that's almost as bad as a dent from dropping it on a nightstand
eggil Posted October 10, 2012 Report Posted October 10, 2012 These things keep getting more and more expensive. Fakes? http://www.ebay.com/...=item1c2a47d38f
justin Posted October 10, 2012 Report Posted October 10, 2012 it looks real. i would think fakes would be sold at a lower price
jwzhan Posted October 10, 2012 Report Posted October 10, 2012 Is that price for one? I couldn't find description on quantity (probably somewhere very obvious.) bdent has them for $8.69/ea, so if this price is for one... it is a bit high..
livewire Posted October 10, 2012 Report Posted October 10, 2012 Yup, price for one. Fuzzy pic - looks like it could be the real deal.
justin Posted October 11, 2012 Report Posted October 11, 2012 (edited) Is anyone interested in 2SA1486? I found that Renesas makes them as well, and I can get them through Arrow, MOQ is 2000pcs. price is about 50 cents each. Edited October 11, 2012 by justin
s_r Posted October 11, 2012 Report Posted October 11, 2012 Are there any stax jack PCBs still available? I've read through this entire thread so I may start buying parts for an onboard version soon. Also how many extra parts did people generally buy (excluding things like lifetime supplies of 2SC4686A's)? I feel like I should get almost enough extras to be able to build a second kgsshv.
eggil Posted October 11, 2012 Report Posted October 11, 2012 Justin, I would be interested in a few. Also, how about some 2SA1486? S_R, might as well buy enough just in case the first attempt blows up! Seriously, I would buy plenty of parts, especially the ones that could become scarce in the future.
justin Posted October 11, 2012 Report Posted October 11, 2012 (edited) Justin, I would be interested in a few. Also, how about some 2SA1486? S_R, might as well buy enough just in case the first attempt blows up! Seriously, I would buy plenty of parts, especially the ones that could become scarce in the future. i just said 2SA1486. and on the 2SA1486 id probably set a min. 50pcs/person ($25), which currently gets you 6pcs at B&D Edited October 11, 2012 by justin
jwzhan Posted October 11, 2012 Report Posted October 11, 2012 i just said 2SA1486. and on the 2SA1486 id probably set a min. 50pcs/person ($25), which currently gets you 6pcs at B&D I'd be interested in 50pcs. Also, although not KGSSHV parts.. how about matched pairs/quads of 2sj74 and 2sk170? AMB has stopped selling them. @s_r Spares are always good. buy as much as you are comfortable with.
justin Posted October 11, 2012 Report Posted October 11, 2012 I'd be interested in 50pcs. Also, although not KGSSHV parts.. how about matched pairs/quads of 2sj74 and 2sk170? AMB has stopped selling them. @s_r Spares are always good. buy as much as you are comfortable with. i wish i could sell them, but i just cant. every pair or quad i sold is one fewer Gilmore amp I can build, until a replacement is issued, if ever.
jwzhan Posted October 11, 2012 Report Posted October 11, 2012 (edited) i wish i could sell them, but i just cant. every pair or quad i sold is one fewer Gilmore amp I can build, until a replacement is issued, if ever. ay understandable. I'm still interested in those 2sa1486 though. EDIT: just bought 50 of matched 2sk170BL+2sj74BL for $3.68 per pair from bdent... might be a price error? because they are selling 50 pieces of 2sk170BL for 0.99/each and 2sj74BL for $7.89/each no discount whatsoever. With 50 of each, I'v got to be able to have some matched quads. And I apparently bought out their 2SC3421.... I need 16, was going to buy 25 but they only have 14.... Edited October 11, 2012 by jwzhan
eggil Posted October 11, 2012 Report Posted October 11, 2012 (edited) I'd be interested in 50 pieces of 2sa1486 also. Thanks Edited October 11, 2012 by eggil
johnwmclean Posted October 11, 2012 Report Posted October 11, 2012 EDIT: just bought 50 of matched 2sk170BL+2sj74BL for $3.68 per pair from bdent... might be a price error? because they are selling 50 pieces of 2sk170BL for 0.99/each and 2sj74BL for $7.89/each no discount whatsoever. With 50 of each, I'v got to be able to have some matched quads. And I apparently bought out their 2SC3421.... I need 16, was going to buy 25 but they only have 14.... Good luck matching, you could get lucky, I've had batches of 200pcs with very poor yield.
Victor Chew Posted October 11, 2012 Report Posted October 11, 2012 Amb only sell to builders of their amp. I had to do the matching myself and was pretty lucky. Followed : http://www.diamondstar.de/transistor_matching_jfet.html
jwzhan Posted October 11, 2012 Report Posted October 11, 2012 I'm not matching them to the extreme.. 10% is good enough for me, although less will be better. There is a little "2005 AMB" water mark on the JEFT diagram.
ujamerstand Posted October 11, 2012 Report Posted October 11, 2012 I'd love to get my hands on more a1486. In for 50 as well.
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