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Rick Casey <caseyrick@gmail.com>: Nov 13 01:43PM -0800 I am not an electronics guy, but need to ask for some opinions from people who are...and hopefully help me find the right solution to fix my amp.   I have a Roland Cube, which I basically use as an amplifier to play music through, or my guitar. The other night I had my laptop plugged into it, playing some recorded music. I had the music coming out of the laptop turned off, the amp turned off, and plugged into the laptop (via a mini-plug wire connector).   I had accidently touched the volume control on my laptop, however, and didn't see that I set the volume at nearly max output, and started the music playing. There was no sound yet, though, since the amp was off; so when I flipped the power switch on the amp, the sound came blasting out in a huge way, though it was garbled and static since it was overloading the system.   Pulling the plug immediately, when I later tried to play music through the amp again at proper volume, nothing comes out but a steady hum. I hear the same hum if there not even anything connected and playing through it.   So my question is: what damage did I likely do? Can it be fixed? Is there any other testing I can do to determine what was damaged?   TIA, --Rick

M Philbrook <jamie_ka1lpa@charter.net>: Nov 13 05:35PM -0500 In article <2aa872e3-0dcf-48fd-8461-57d05e8eb92f@googlegroups.com>, caseyrick@gmail.com says...   > So my question is: what damage did I likely do? Can it be fixed? Is there any other testing I can do to determine what was damaged?   > TIA, > --Rick   Maybe when yuo yanked the cord you could of broke a wire in the cord or a solder joint where the plug is inside the unit.   Jamie

Chuck <chuck@mydeja.net>: Nov 13 04:38PM -0600 On Fri, 13 Nov 2015 13:43:58 -0800 (PST), Rick Casey   >So my question is: what damage did I likely do? Can it be fixed? Is there any other testing I can do to determine what was damaged?   >TIA, >--Rick If it is a loud 120 hz hum, chances are the power amp section is blown. (Shorted parts)   --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Nov 14 10:23AM +1100 On 14/11/2015 8:43 AM, Rick Casey wrote: > and playing through it.   > So my question is: what damage did I likely do? Can it be fixed? Is > there any other testing I can do to determine what was damaged?   **Unknown. Probably. Not really.   -- Trevor Wilson www.rageaudio.com.au   --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

"pfjw@aol.com" <pfjw@aol.com>: Nov 14 06:37AM -0800 Look for internal fuses. Generally what you did will not damage most amps.... But it may well pop internal fuses or links. But not always. Next would be the output devices.

asdf <asdf@nospam.com>: Nov 13 09:20PM On Tue, 10 Nov 2015 16:27:04 +0000, Mark Zenier wrote:     > enough that they can sell eyeballs to advertisers" as opposed to > "provide the best results". I've found that if you repeat/refine the > search they dig deeper into the files.   That one is the exact reason why last year Google removed the incredibly useful discussion search filter.   https://productforums.google.com/forum/#!topic/websearch/Psb6OmlLJTg http://aninterestingcommunity.com/tag/google-discussion-search/   Before that day you could use the filter to find people talking about something, now you are directly pointed to companies selling that thing.   I'm infuriated by Google attitude towards their users, so that I'm using https://duckduckgo.com more and more, stopped logging in on my G+ account months ago and one day will probably get rid of my gmail account too.

Ken <ken_3@telia.com>: Nov 14 04:18AM +0100

Ken <ken_3@telia.com>: Nov 14 04:18AM +0100

Ken <ken_3@telia.com>: Nov 14 04:17AM +0100 Mitt under den pågående terrorattacken i Paris twittrade vice statsminister Åsa Romson (MP) ut sin oro för hur klimatmötet skulle påverkas. "Det mycket allvarliga händelserna i Paris just nu kan försvåra för klimattoppmötet i dec då över 100 regeringschefer planerat delta." skrev hon på Twitter, strax efter att det blivit känt att minst 60 människor dödats. Uttalandet fick enorm kritik i sociala medier. "Grattis, kvällens mest osmakliga tweet!" skrev en person på Twitter och "Herregud, Åsa Romson, har ditt konto blivit hackat?" skrev en annan, enligt Expressen. Romson tog snabbt bort det kritiserade inlägget. Hennes pressekreterare säger till Expressen att hon inte vill kommentera tweeten och att den nu har skrivits om.   http://omni.se/start/861c9a37-68ed-48ba-900c-ac48423ee7fe

Ken <ken_3@telia.com>: Nov 14 04:15AM +0100 Gärningsmännen som sköt ska också ha ropat: "Allahu Akbar"   http://omni.se/topic/1220dda9-f80d-4b9a-92a2-c7e27587fc32/36b8ce0e-c086-4d2a-96d9-f6364873b090

"Ian Field" <gangprobing.alien@ntlworld.com>: Nov 13 07:01PM "Micky" <NONONOmisc07@bigfoot.com> wrote in message news:2kta4blrlhgi41b7bs6lcb59ddo8piprtv@4ax.com... > voltage of the 14.2 charger to where it's not backcharging the 13.8 > charger? And won't the battery charge at rate of the sum of the two > chargers, 2 (or 10) amps and 10 amps?   Way back when some power stations in the UK produced DC mains - some people charged their car battery by putting it in series with an electric fire.   These days; you need a pretty hefty bridge rectifier.

"Ian Field" <gangprobing.alien@ntlworld.com>: Nov 13 07:04PM <Paintedcow@unlisted.moc> wrote in message news:jibb4b18fmta7a69cdfufav62l288mc2te@4ax.com... > 50 A charger, 16 A is still minimal compared to the bigger chargers.   > Just sharing my experience, not guaranteeing you can do it safely. But > like i said, I've never had any problems doing it.   One of the UK hobby magazines published a project for a super-duper battery charger involving 3x LV lighting transformers, all assembled in a cheap steel tool case.   Can't remember which one or how long ago.

Paintedcow@unlisted.moc: Nov 13 06:06PM -0600 On Fri, 13 Nov 2015 08:25:49 -0500, Micky <NONONOmisc07@bigfoot.com> wrote:   >>like i said, I've never had any problems doing it.   >Good enough. Thanks. (Though I've written down your email address >and my estate will be suing you if this proves fatal.)   It wont be fatal for you, it's only 12volts. But it could damage a charger or battery, although I have never had that happen. My chargers are old, so they dont have all the circuitry that some new ones have. It's just a transformer, some diodes, and a reset to shut it down in the event of a direct short. Very simple, and I have fixed several of them over the years. Usually it's a bad diode or two, or that reset device fails. I did have one burn the transformer out, after it got rained on. I learned that the hard way! I always cover them now if they are in use outdoors.

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