Kerry Posted September 25, 2013 Report Posted September 25, 2013 (edited) Very nice! I can see this project in my future Edited September 25, 2013 by Kerry Quote
kevin gilmore Posted September 25, 2013 Author Report Posted September 25, 2013 by the way, the newer krell power supply was cloned from this one and only picture http://gilmore.chem.northwestern.edu/newkrellps.jpg no schematics were available, and no one I know actually had one, boozebuttons had the older one Quote
luvdunhill Posted September 25, 2013 Report Posted September 25, 2013 I want a collection of audio company branded transistors. That would be awesome wall art. Quote
fordgtlover Posted September 28, 2013 Report Posted September 28, 2013 (edited) Almost finished the amp, and waiting on a Mouser order for P/S parts. Edited September 28, 2013 by fordgtlover 1 Quote
fordgtlover Posted October 13, 2013 Report Posted October 13, 2013 My zener power supply is up and running and temporarily cased. I couldn't find a 27V transformer so I've used a 25V one, which results in an output voltage of the power supply at ~20.5v. Is using a 25v transformer a problem? Quote
kevin gilmore Posted October 13, 2013 Author Report Posted October 13, 2013 (edited) That is right depending on the second stage zeners. If unreg voltage is at least 35 you will be fine Edited October 13, 2013 by kevin gilmore Quote
fishski13 Posted October 19, 2013 Report Posted October 19, 2013 looking good ford. i'm placing orders next week along with a TX from SumR. Quote
fordgtlover Posted October 20, 2013 Report Posted October 20, 2013 (edited) Cheers. Do you have a cost on the TX? Edited October 20, 2013 by fordgtlover Quote
fishski13 Posted October 20, 2013 Report Posted October 20, 2013 (edited) not yet. i'm contacting Richard on Mon. 27V/50VA i'm guessing will be around $50-60 + shipping. i'll let you know. no 4.7uF Wima from Mouser until mid Dec. may try to parallel 3.3uF and 1uF with the latter mounted perpendicular/flush underneath the pcb. Edited October 20, 2013 by fishski13 Quote
spritzer Posted October 20, 2013 Report Posted October 20, 2013 You can try the Wima distributor instead. They sell small lots. Quote
fishski13 Posted October 21, 2013 Report Posted October 21, 2013 thanks Bigir. i have a bunch of 50V 4.7uF Wimas in the parts bin with 5mm pitch. any issues going with a lower VDC rating? since we're looking at decoupling rails of 21V and compensation on the DC servo, 50VDC should be safe? Quote
fishski13 Posted October 22, 2013 Report Posted October 22, 2013 great. i went ahead and ordered a SumR 2 x 27V/50VA at $54. Quote
GrindingThud Posted October 27, 2013 Report Posted October 27, 2013 Wandered over from some of the other forums....this build caught my eye. Nice! Thinking about doing one.... Quote
bozebuttons Posted October 30, 2013 Report Posted October 30, 2013 (edited) Here is a you tube video some one made for a ebay sale of a KSA-5 in 2011. Edited October 30, 2013 by bozebuttons Quote
spritzer Posted October 30, 2013 Report Posted October 30, 2013 Wow, that's.... ehhh... quite dramatic. Quote
kevin gilmore Posted October 30, 2013 Author Report Posted October 30, 2013 When you are trying to sell a used 20 year old amp for $5k what do you Expect. It is a great amp but not for very low sensitivity headphones Quote
bozebuttons Posted October 31, 2013 Report Posted October 31, 2013 Wow, that's.... ehhh... quite dramatic. Thats what you call salesmanship! Quote
GrindingThud Posted October 31, 2013 Report Posted October 31, 2013 I've got some PMs out to try and get a board set (lil knight). Any other leads would be appreciated. Looks like this is going to be a cool build. Quote
kevin gilmore Posted October 31, 2013 Author Report Posted October 31, 2013 All board files are available if you want t have boards made Quote
GrindingThud Posted October 31, 2013 Report Posted October 31, 2013 I may go that route, but figured I'd try to get on someone else's run to help keep everyone's costs down. Is there a suggested service that has successfully done a run with these files? Thanks for the reply!All board files are available if you want t have boards made Quote
kevin gilmore Posted October 31, 2013 Author Report Posted October 31, 2013 (edited) Www.pcbnet.com amp board is 10 x 7.5 inches 609 holes 10 boards from pcbnet.com would be $425 3 oz copper Edited November 1, 2013 by kevin gilmore Quote
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