intotubes Posted January 5, 2006 Share Posted January 5, 2006 http://cgi.ebay.com/Dynaco-ST70-Amplifier-NEW-BASIC-BARE-BOARD_W0QQitemZ5848588314QQcategoryZ50593QQrdZ1QQcmdZViewItem http://cgi.ebay.com/Dynaco-MKIII-MKII-Amplifier-NEW-BASIC-BARE-BOARD_W0QQitemZ5848588419QQcategoryZ50593QQrdZ1QQcmdZViewItem http://cgi.ebay.com/NEW-BASIC-BARE-BOARD-SET-Dynaco-PAS-Preamp_W0QQitemZ5848588554QQcategoryZ14974QQrdZ1QQcmdZViewItem http://cgi.ebay.com/Dynaco-ST35-Amplifier-NEW-PC-13-BARE-BOARDS_W0QQitemZ5847598394QQcategoryZ71545QQrdZ1QQcmdZViewItem http://cgi.ebay.com/NEW-Dynaco-ST35-Amplifier-STUFFED-PC-13-BOARD-SET_W0QQitemZ5847600824QQcategoryZ71545QQrdZ1QQcmdZViewItem Can you build an amp from these? Do you just need a manual and a box, components, etc? Is it possible for a regular joe with a soldering iron and time on his hands? Quote Link to comment Share on other sites More sharing options...
Johnny dB Posted January 5, 2006 Share Posted January 5, 2006 I think those are for replacing. The iron is what would be cost prohibitive. I don't think a regular Joe w/ a soldering iron could build an amp with just those pc boards to start. Can you read a schematic? Quote Link to comment Share on other sites More sharing options...
John Pearlman Posted January 5, 2006 Share Posted January 5, 2006 Yeah but for the PAS it would be worth it if you have the external power supply... Quote Link to comment Share on other sites More sharing options...
intotubes Posted January 6, 2006 Author Share Posted January 6, 2006 I think those are for replacing. The iron is what would be cost prohibitive. I don't think a regular Joe w/ a soldering iron could build an amp with just those pc boards to start. Can you read a schematic? Yeah, I forgot about the power supply and ouput transformers. You would have to find a junker I guess and rebuild it. Don't know if you can find replacement trannys for these or not. Yeah I can read a schematic. I've put together a couple small projects. Built me one of those gainclone chip amps too once. He doesn't supply the schematic (why, I don't know). A guy would have to find a copy of the original kit instructions I suppose. Just thinking out loud here. It seemed like a good start to a DIY project. Maybe not though. Quote Link to comment Share on other sites More sharing options...
rtaylor Posted January 11, 2006 Share Posted January 11, 2006 There are kits out there that would be better for a grunt like you or I . Had 2 MK-II's that I rebuilt from scratch. Without the manuals and help from the manufacturer and others from this forum I would not have been able to finish it. Finding the old iron in my opinion would be the first step. I have some parts left over from my project if you might need something. Randy Quote Link to comment Share on other sites More sharing options...
intotubes Posted January 13, 2006 Author Share Posted January 13, 2006 Yeah...kits for grunts. I like that. I tried a fairly complicated high powered amp without a lot of experience. I must've smoked the transistors with too much heat. It never worked. I'm not good enough to test the signal path to see what's wrong. I thought about a ground up rebuild of it but I'd have to rebuy the board(s) and components. Don't know that I'd have the patience to do it all over again. It actually was looking pretty cool. I have a huge torroidal power supply - something like 70 volts DC to the amp. It was supposed to be 250W. I had a cool heatsink that stuck through the top of the case. It was all set with switches and connectors but alas, it didn't work out. A tube project would be cool though. Even if it was point to point. No transistors to fry. I rebuilt my FIsher and an old HH Scott mono tuner. I have the equipment to revive/restore vintage stuff if it isn't too far gone. Finding vintage stuff is a challenge though. Thought about parting out the amp project on ebay to financ a vintage amp. oh well.....thinking out loud again.... Quote Link to comment Share on other sites More sharing options...
Joe Auwen Posted January 17, 2006 Share Posted January 17, 2006 I believe one of the Dynaco websites (link escapes me at the moment) has what they call Dynaclone trannies that are supposed to be exact replacements for the originals. Craig from NOSValves I think mentioned at one time that he could provide suitable replacements as well. The Dynaco sites also have lots of info/parts for building or re-building most of the Dynaco amps. I'm hoping to tackle one or two as a 'winter' project next year.... [] Quote Link to comment Share on other sites More sharing options...
AnalOg Posted January 17, 2006 Share Posted January 17, 2006 http://www.triodeelectronics.com/ Quote Link to comment Share on other sites More sharing options...
JJkizak Posted January 17, 2006 Share Posted January 17, 2006 What ever happened to Heathkit? JJK Quote Link to comment Share on other sites More sharing options...
intotubes Posted January 17, 2006 Author Share Posted January 17, 2006 So is it possible to build an entire, say ST70, from these kits? Anyone tried it? I wonder if it would be an economical option to homebrew one instead of finding one on ebay or something? Quote Link to comment Share on other sites More sharing options...
Colin Posted January 17, 2006 Share Posted January 17, 2006 Bottlehead makes good kits too. Quote Link to comment Share on other sites More sharing options...
intotubes Posted January 17, 2006 Author Share Posted January 17, 2006 Bottlehead seems a little too proud of their stuff. The prices on the Dynaco iron and boards didn't seem too bad at first glance. Quote Link to comment Share on other sites More sharing options...
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