---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 10/25/23: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:29 AM - OVM14 MkIII, rev P2 (Robert L. Nuckolls, III) 2. 07:29 PM - Re: OVM14 MkIII, rev P2 (Eric Page) ________________________________ Message 1 _____________________________________ Time: 11:29:45 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: OVM14 MkIII, rev P2 The upgrade to the AEC9003 CBOV Module has not been laying dormant. I've been working the ECB layout which is by necessity, a multi-day task. It might take me a few hours to do a first pass on the layout but then I need to put it down for a day or so and come back for an integrity check. If any 'bugs' identified, fix'em and set it down again to 'mature'. If the next check is good, I can do an ECB fabrication paste up. Day later, check one more time and get a quote on the first fabrication order. In this case, I can get 45 boards on a 'proto' order. Double sided, plated thru, tin-lead plated traces, solder masked both sides for $90. That comes out to $2 per board. Fair 'nuf. I've posted the documents to the website at: http://aeroelectric.com/AEC_Legacy_Products/9003/AEC9003%20MkIII%20Check%20Drawings.pdf Anyone adept at 500-piece jigsaw puzzles will find this 20-piece puzzle no big deal. Any assistance with making sure it wasn't a foggy day at this end is appreciated. I'll get an order in for the boards along with one to Digikey for parts not already on hand. We should have parts on hand for first production proof batch by end of next week. Need to go to Wichita next week. I'll pick up my loaned out environmental chamber. We'll want to get a look at temperature effects on performance of the first articles. Bob . . . //// (o o) ===========o00o=(_)=o00o======== < Go ahead, make my day . . . > < show me where I'm wrong. > ================================ In the interest of creative evolution of the-best-we-know-how-to-do based on physics and good practice. ________________________________ Message 2 _____________________________________ Time: 07:29:53 PM PST US Subject: AeroElectric-List: Re: OVM14 MkIII, rev P2 From: "Eric Page" nuckolls.bob(at)aeroelect wrote: > Any assistance with making sure it wasn't a foggy day at this end is appreciated. It looks to me that the layout matches the schematic perfectly. Just a few comments to offer: Suggest not placing vias within the borders of SMD pads unless the they'll be filled with copper (at most board fabs, that's a high-cost option). As-is, the vias will tend to wick solder away from the components and may produce poor soldering results. Are you planning to remove the middle leg of the SCR and surface-mount the part? If so, there will be a trace and vias, connected to MT1, sitting directly under the MT2 tab. Unless the vias are tented, the one at the end of that trace will put exposed copper under the exposed tab, possibly touching. It appears that the wires will be soldered to surface pads. I tried that once and it didn't take much effort for the wires pull pads off the board. Suggest using through-holes to attach wires -or- put drilled holes near the pads so that the wires can pass through the board from top to bottom for mechanical support before soldering. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=511660#511660 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.