Mighty Favog Posted December 29, 2010 Share Posted December 29, 2010 Has anyone ever done this and is it as simple as using a little pursuation from the inside with a rubber mallet? I'm thinking of going the way of converting my Corns to Cornscala II's and Bob is now offering new motorboards for the project. All I would need to order are the motorboards, different networks, midrange drivers and horns. Oh.......and he can make new grill boards as well to fit the new midrange openings and other driver locations. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted December 29, 2010 Share Posted December 29, 2010 I pulled a few and they came out pretty easy.....didn't even need a mallet. Why....the motorboards are glued in, but the grill cloth wraps aound the board egdes. What you wind up with is a wood to cloth glueing rather than a wood to wood glueing.If you find that you do need a mallet, use a strip piece of wood as an impact point like a 1 foot section of 2X4. Quote Link to comment Share on other sites More sharing options...
Mighty Favog Posted December 29, 2010 Author Share Posted December 29, 2010 Sounds like a plan, thanks. The only thing I could see on mine was that it looked like they were held in with long indutrial staples. The kind you'd see holding a pallett skid together. Of course, I'm sure they're glued too. If I do go this route I'll probably screw in the new boards as well as maybe some liquid nails. Just one screw near each corner to hold them in place while the glue dries. At which point I'll probably have some of Bob's B-3's for sale. [] Quote Link to comment Share on other sites More sharing options...
IB Slammin Posted December 29, 2010 Share Posted December 29, 2010 I pulled a few and they came out pretty easy.....didn't even need a mallet. Why....the motorboards are glued in, but the grill cloth wraps aound the board egdes. What you wind up with is a wood to cloth glueing rather than a wood to wood glueing.If you find that you do need a mallet, use a strip piece of wood as an impact point like a 1 foot section of 2X4. Yo fritz, My '75 CW1's have the grill cloth wrap around a removable hard-board front. Several years ago I axed that same question and was told by Andy (hornbuilder) that the port shelves were shot and glued into motorboard as well as the side boards.. To beat out the motorboard would make a mess of the ports. What am I missing here? Could it be construction year dependent? Does Bob offer a new motorboard with new port shelves? Regards, tc Quote Link to comment Share on other sites More sharing options...
Mighty Favog Posted December 29, 2010 Author Share Posted December 29, 2010 This may be a question for Steve Phillips..... Quote Link to comment Share on other sites More sharing options...
Steve Phillips Posted December 30, 2010 Share Posted December 30, 2010 Some motorboards were screwed in from the inside of the cabinet on some years, late 60's to early 70's as I recall If it's glue/nailed in, I can't offer any suggestions, it's plywood....may make a mess if it is glued in. Quote Link to comment Share on other sites More sharing options...
Budman Posted December 30, 2010 Share Posted December 30, 2010 i took out the motorboards from a pair of 74 verticals. 17 screws and a little tap and they fell right out. 5000 staples later and the cloth was removed Quote Link to comment Share on other sites More sharing options...
Mighty Favog Posted December 30, 2010 Author Share Posted December 30, 2010 So I'm assuming the screws were run in from the outside of the cabinet before they put the veneer on (if any)? Quote Link to comment Share on other sites More sharing options...
garyeanderson Posted December 30, 2010 Share Posted December 30, 2010 If your Cornwall’s are 84's like mine I would bet they are well glued as well as stapled every 6 to 8 inches. If you don't care about the current motorboard/baffle then pull the staples and use a pattern cutting bit in a router the go around the perimeter and then use a guide across the port shelf. Easy for me to say as I wouldn't do it. Time to learn how to build if you want to do this or find some earlier Cornwall's to beat up on. this is only my opinion, you may try it and they will pop right out or maybe not... Quote Link to comment Share on other sites More sharing options...
garyeanderson Posted December 30, 2010 Share Posted December 30, 2010 inside picture Quote Link to comment Share on other sites More sharing options...
Budman Posted December 30, 2010 Share Posted December 30, 2010 So I'm assuming the screws were run in from the outside of the cabinet before they put the veneer on (if any)?the screws were run in from the inside of the cabinet thru the cleats into the back of the motorboard Quote Link to comment Share on other sites More sharing options...
Mighty Favog Posted December 30, 2010 Author Share Posted December 30, 2010 That's good to know! Now that's something I can handle.[] Quote Link to comment Share on other sites More sharing options...
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