Title: New DIY OTS build Post by: axiology on May 12, 2010, 12:25:14 AM It came up OK right from the start, I was thinking of plugging it in using a long extension cord from the next room, with a fire extinguisher handy :)
I put a couple of pics of it mounted in its tweed cab in the "Pics of completed Overtones" Thread Not sure any more pics of internals are required but, (http://i245.photobucket.com/albums/gg79/axiology_2008/OTS3.jpg) (http://i245.photobucket.com/albums/gg79/axiology_2008/OTS1.jpg) Title: Re: New DIY OTS build Post by: mcinku on May 12, 2010, 06:05:01 AM Good job,
what are those strange looking caps... haven't seen those in Ceriatone kits before ;) Title: Re: New DIY OTS build Post by: axiology on May 12, 2010, 04:07:59 PM Good job, what are those strange looking caps... haven't seen those in Ceriatone kits before ;) I guess you're referring to the big brown ones on the main board. I looked at your build pics, they're certainly different, much larger for sure. According to the layout they should be .1uf, maybe a higher voltage rating. There seem to be polarization marks on them, but they're not electrolytics. I recall a few weeks back I was reading a thread on I think, the ampgarage site concerning an amp builder who was testing some of his allegedly non-polarized caps, finding a consistent difference in performance depending on polarity. Maybe Nik has picked up on this and started doing the same. Title: Re: New DIY OTS build Post by: cyndicate on May 12, 2010, 07:41:08 PM Sweet! More pictures of internal the better! Can never have enough pictures, I would love some close ups of all the insides so it can help when I build my OTS HRM BM build. I can't wait to get my kit, I have the transformers waiting to be used already.
Title: Re: New DIY OTS build Post by: erwin_ve on May 12, 2010, 08:10:45 PM The outer foil is marked because it can be used as a shield against electric field coupling into the capacitor.
It looks like this: plate voltage-->>cap(outer foil-->other side;inner foil)-->>to next gain stage. When done the right way your amp can be considerably more quiet. For further info on this subject visit: http://www.aikenamps.com/OutsideFoil.htm (http://www.aikenamps.com/OutsideFoil.htm) Good job, what are those strange looking caps... haven't seen those in Ceriatone kits before ;) I guess you're referring to the big brown ones on the main board. I looked at your build pics, they're certainly different, much larger for sure. According to the layout they should be .1uf, maybe a higher voltage rating. There seem to be polarization marks on them, but they're not electrolytics. I recall a few weeks back I was reading a thread on I think, the ampgarage site concerning an amp builder who was testing some of his allegedly non-polarized caps, finding a consistent difference in performance depending on polarity. Maybe Nik has picked up on this and started doing the same. |