Dual IM386 Chip amp - Cigar Box Nation2024-03-29T08:19:52Zhttps://www.cigarboxnation.com/forum/topics/dual-im386-chip-amp?groupUrl=home-made-guitar-amps&feed=yes&xn_auth=noCan you post a pic?tag:www.cigarboxnation.com,2017-01-27:2592684:Comment:27807862017-01-27T07:22:58.561ZPaul Craighttps://www.cigarboxnation.com/profile/PaulCraig
<p>Can you post a pic?</p>
<p>Can you post a pic?</p> Hey Paul. Thanks again for po…tag:www.cigarboxnation.com,2017-01-27:2592684:Comment:27803592017-01-27T00:10:51.168ZScavanged Sound (Pete)https://www.cigarboxnation.com/profile/Pete557
Hey Paul. Thanks again for posting these schematics. I whipped up the revised one and I have an issue maybe you can help with. I have sound coming through my speaker. The tone control works the switch for the cap values works and the 2nd gain circuit works. My ssue is with the first gain circuit. I am getting sound for it but also a lot of squelch. I know somethings wrong here. I've triple checked the wiring and I just can't seem to see what's wrong. I've switched out both chips 2 times and it…
Hey Paul. Thanks again for posting these schematics. I whipped up the revised one and I have an issue maybe you can help with. I have sound coming through my speaker. The tone control works the switch for the cap values works and the 2nd gain circuit works. My ssue is with the first gain circuit. I am getting sound for it but also a lot of squelch. I know somethings wrong here. I've triple checked the wiring and I just can't seem to see what's wrong. I've switched out both chips 2 times and it still does it. Any insight into where I went wrong? Tips for trouble shooting? I did not know the about adju…tag:www.cigarboxnation.com,2017-01-19:2592684:Comment:27749292017-01-19T20:09:12.235ZScavanged Sound (Pete)https://www.cigarboxnation.com/profile/Pete557
I did not know the about adjusting tone with the caps. Thanks for the info
I did not know the about adjusting tone with the caps. Thanks for the info For example: The Ruby and oth…tag:www.cigarboxnation.com,2017-01-19:2592684:Comment:27748192017-01-19T18:37:43.918ZPaul Craighttps://www.cigarboxnation.com/profile/PaulCraig
<p>For example: The Ruby and other single chip amps have a 220uf cap in the + output line to the speaker. Since this is a bridged amp, it gets a cap in the + and - lines to the speaker.</p>
<p>I used a WGS 8ohm 20watt 10" speaker for my build and I started off with the 220uf caps, but it was very very bright sounding. Might be what you like, just not what I was going for. So I tried a couple of different value caps til I got the tone I liked which ended up being 10uf for both lines. So the…</p>
<p>For example: The Ruby and other single chip amps have a 220uf cap in the + output line to the speaker. Since this is a bridged amp, it gets a cap in the + and - lines to the speaker.</p>
<p>I used a WGS 8ohm 20watt 10" speaker for my build and I started off with the 220uf caps, but it was very very bright sounding. Might be what you like, just not what I was going for. So I tried a couple of different value caps til I got the tone I liked which ended up being 10uf for both lines. So the speaker you use(due to it's voicing) or your personal likes will determine which output caps will be best.</p>
<p>My original build had no caps in the output lines, but also had a lot of unwanted noise and some oscillation.</p> Thanks for the updated schema…tag:www.cigarboxnation.com,2017-01-19:2592684:Comment:27745142017-01-19T04:16:53.651ZScavanged Sound (Pete)https://www.cigarboxnation.com/profile/Pete557
Thanks for the updated schematic Paul. What do you mean by cap changes due to the speaker?
Thanks for the updated schematic Paul. What do you mean by cap changes due to the speaker? I revised the schematic and p…tag:www.cigarboxnation.com,2017-01-18:2592684:Comment:27743262017-01-18T22:58:29.145ZPaul Craighttps://www.cigarboxnation.com/profile/PaulCraig
<p>I revised the schematic and posted it at the top of the page.<br/> Changes are N3 chips instead of the N1's due to the N1 chip's not lasting long in a bridged amp.<br/>
A change in pot/controls: 1 volume - 1 tone - 2 gain.<br/>
Added caps in the output lines: the cap values will change depending on the speakers used.</p>
<p>I revised the schematic and posted it at the top of the page.<br/> Changes are N3 chips instead of the N1's due to the N1 chip's not lasting long in a bridged amp.<br/>
A change in pot/controls: 1 volume - 1 tone - 2 gain.<br/>
Added caps in the output lines: the cap values will change depending on the speakers used.</p> Oh man.... you are the best..…tag:www.cigarboxnation.com,2017-01-18:2592684:Comment:27739522017-01-18T15:27:16.320ZScavanged Sound (Pete)https://www.cigarboxnation.com/profile/Pete557
<p>Oh man.... you are the best....this is just what I have been looking for. I've been scouring the net for a schematic that had the pots included in the diagram. Thanks a million for posting this drawing.</p>
<p>Oh man.... you are the best....this is just what I have been looking for. I've been scouring the net for a schematic that had the pots included in the diagram. Thanks a million for posting this drawing.</p> A resistor can be added to th…tag:www.cigarboxnation.com,2016-03-31:2592684:Comment:25586462016-03-31T19:06:47.370ZPaul Craighttps://www.cigarboxnation.com/profile/PaulCraig
<p>A resistor can be added to the 8ohm across the terminals, but I don't know the needed value. 4ohm sounds logical, but not sure if it's correct.</p>
<p>A resistor can be added to the 8ohm across the terminals, but I don't know the needed value. 4ohm sounds logical, but not sure if it's correct.</p> They will work, but will star…tag:www.cigarboxnation.com,2016-03-31:2592684:Comment:25587022016-03-31T19:01:14.533ZPaul Craighttps://www.cigarboxnation.com/profile/PaulCraig
<p>They will work, but will start to rag out soon. Go to your local thrift store and get a surround sound subwoofer. They usually have a couple for cheap.</p>
<p>They will work, but will start to rag out soon. Go to your local thrift store and get a surround sound subwoofer. They usually have a couple for cheap.</p> Thanks Wayfinder,
I'm going…tag:www.cigarboxnation.com,2016-03-30:2592684:Comment:25578562016-03-30T21:56:53.096ZMurdoc_420https://www.cigarboxnation.com/profile/Murdoc420
<p> Thanks Wayfinder,</p>
<p> I'm going to start a thread on this project and try to piece something together :D</p>
<p> Thanks Wayfinder,</p>
<p> I'm going to start a thread on this project and try to piece something together :D</p>