Members Juloni Posted August 27, 2008 Members Share Posted August 27, 2008 Hi All ! I would like to request your advice on this, it's quite important I just bought an AMP (Carlsbro - 90W- quite old), and when i play, after like 10 minutes the sound simply disappears. The power led was still switched on, and no cable was unplugged. If i switch off / switch on directly after the problem occured, it won't work, i won't get any sound. thing is, I have to switch it off, wait at least 20 minutes before trying again. Did this already happen to someone ? I noticed that this amp has a fuse at the back. Could the fuse be the reason ? I Hope i'll get some answers. Or i'll start to chase the guy who sold it to me . Cheers ! Link to comment Share on other sites More sharing options...
Members Death Hands Posted August 27, 2008 Members Share Posted August 27, 2008 Overheating? Link to comment Share on other sites More sharing options...
Members BigPigPeaches Posted August 27, 2008 Members Share Posted August 27, 2008 Overheating? +1. The fuse is unlikely to be the problem, as a fuse (and thereby, the amp) either works or it doesn't. Sounds like the output transformer is overheating and shutting down. It's a protection mechanism to keep you from rocking the amp to death. Nice job! Link to comment Share on other sites More sharing options...
Members Juloni Posted August 27, 2008 Author Members Share Posted August 27, 2008 OK Thanks ! Thing is i just bought the amp 2 days ago. And i played very quietly Is it expensive (or even possible) to replace the transformer ?Sorry for my ignorance, i never had any pb with my amps in the past, so i don't know much about it... Link to comment Share on other sites More sharing options...
Members BigPigPeaches Posted August 27, 2008 Members Share Posted August 27, 2008 Thanks for the reply but I don't think so dude... i live in -cold- ireland, and problem occurs after only 5 or 10 minutes... the amp shouldn't get that warm so quickly ... Oh. Well, your logic is incontrovertible. I retract my statement and wish you the best of luck. Link to comment Share on other sites More sharing options...
Members NeonVomit Posted August 27, 2008 Members Share Posted August 27, 2008 If it's just a fuse problem, then changing the fuse *should* do the trick. Take it to a techie and have him look it over, if it's going to cost close to what you paid for it to fix it, then just sell it to some guillible sod and get another amp. Link to comment Share on other sites More sharing options...
Members Super Bass Posted August 27, 2008 Members Share Posted August 27, 2008 I've come across this before. Is there an effects loop on the amp?? If so, that's the likely culprit. I've seen this on another Carlsbro amp and also a Session amp. As a long-term solution, the joints on the effects loop jacks will need resoldering but for a short term solution what I did was put a patch cable in the effects loop. It worked perfectly! Just noticed you're in Ireland, where bouts? Link to comment Share on other sites More sharing options...
Members The Unknown Posted August 27, 2008 Members Share Posted August 27, 2008 Hi All ! I would like to request your advice on this, it's quite important I just bought an AMP (Carlsbro - 90W- quite old), and when i play, after like 10 minutes the sound simply disappears. The power led was still switched on, and no cable was unplugged. If i switch off / switch on directly after the problem occured, it won't work, i won't get any sound. thing is, I have to switch it off, wait at least 20 minutes before trying again. Did this already happen to someone ? I noticed that this amp has a fuse at the back. Could the fuse be the reason ? I Hope i'll get some answers. Or i'll start to chase the guy who sold it to me . Cheers ! Is this a tube amp ? Could be the tubes are ready for retirement... Link to comment Share on other sites More sharing options...
Members Juloni Posted August 27, 2008 Author Members Share Posted August 27, 2008 Thanks guys for the answers, I think i'll try to have a look at the fuse and replace it ... just in case... Beside of that:- This is no tube Amp, and i have no effects plugged in. Only the bass directly plugged to the Amp (i tried both entries). - I'm french but have been living in Dublin for 2 years now. Was playing bass years ago, and even if i'm crap, lately i really felt i wanted to play again. - Don't feel like having it fixed by a technician, don't want to spend more money for an old Amp that may have more problems soon. So for the moment i'm just pissed of and actively planning revenge on the b*st*rd who sold me this piece of junk X) Link to comment Share on other sites More sharing options...
Members Super Bass Posted August 27, 2008 Members Share Posted August 27, 2008 Thanks guysI think i'll try to have a look at the fuse and replace it ... just in case...Beside of that:- i have no effects plugged in. Only the bass directly plugged on the Amp (i tried both entries).- I'm french but have been living in Dublin for 2 years now. Was playing bass years ago, and even if i'm crap, lately i really felt i wanted to play again.- Don't feel like having it fixed by a technician, don't want to spend more money for an old Amp that may have more problems soon.So for the moment i'm just pissed of and actively planning revenge on the b*st*ard who sold it to me X) No, I mean the effects loop. There should be two jacks on the back, one marked "Send" and one marked "Return". Connect a patch lead between these. Link to comment Share on other sites More sharing options...
Members Juloni Posted August 27, 2008 Author Members Share Posted August 27, 2008 No, I mean the effects loop. There should be two jacks on the back, one marked "Send" and one marked "Return". Connect a patch lead between these. Owwww Ok But -excuse my ignorance- Do you mean to just plug a jack between 'send' and 'return', or to perform more advanced electrical wiring and manipulations ??? Link to comment Share on other sites More sharing options...
Members Super Bass Posted August 27, 2008 Members Share Posted August 27, 2008 Owwww Ok But -excuse my ignorance- Do you mean to just plug a jack beween 'send' and 'return', or perform more advanced electrical wiring and manipulations Yeah, just plug a cable between them. I used a small patch lead because it didn't get in the way but you could test it with a spare guitar cable if you have one. I used mine for about a year like that before opening it up and fixing it inside, and even that just meant replacing a wire and resoldering the jacks. I only did that then because I was selling it! Link to comment Share on other sites More sharing options...
Members Juloni Posted August 27, 2008 Author Members Share Posted August 27, 2008 Yeah, just plug a cable between them. I used a small patch lead because it didn't get in the way but you could test it with a spare guitar cable if you have one. I used mine for about a year like that before opening it up and fixing it inside, and even that just meant replacing a wire and resoldering the jacks. I only did that then because I was selling it! Alright ! But thing is...i can play for 5 / 10 minutes before the sounds brutally fades out. So problem would come from the wiring, i suppose i wouldn't get any sound at all from the start. Anyway i'll try tonight, have nothing to lose thanks for the tips Link to comment Share on other sites More sharing options...
Members Super Bass Posted August 27, 2008 Members Share Posted August 27, 2008 Yeah, that happened to me too with my old amp. Mine usually lasted about 15 or 20 minutes and just faded out. The power light remained on but no sound at all Apparently it's very common with those old {censored}ty mosfet amps made in the UK. Most of them used the same wiring scheme and parts. No problem, let me know if it works! Link to comment Share on other sites More sharing options...
Members Juloni Posted August 27, 2008 Author Members Share Posted August 27, 2008 Yeah, that happened to me too with my old amp. Mine usually lasted about 15 or 20 minutes and just faded out. The power light remained on but no sound at all Apparently it's very common with those old {censored}ty mosfet amps made in the UK. Most of them used the same wiring scheme and parts. No problem, let me know if it works! Hey man, look We're both living in Ireland, and suffering from bad quality amps from the UK. Doesn't that smell like conspiracy ??? Link to comment Share on other sites More sharing options...
Members hawkhuff Posted August 27, 2008 Members Share Posted August 27, 2008 If it's just a fuse problem, then changing the fuse *should* do the trick.Take it to a techie and have him look it over, if it's going to cost close to what you paid for it to fix it, then just sell it to some guillible sod and get another amp. Definitely not a fuse. A fuse either works or it pops (burns out) and will never work again (the fuse). Fuses have nothing to do with the sound of the amp much less its performance, it has a protective function from electrical overload. There is something going on with the amp circuitry and the transformer is certainly a possibilty. Ten minutes is plenty of time for it to heat up. A transformer is too difficult to replace if you know what you're doing. You need to match the specs of the transformer you're removing with the one you're replacing. Link to comment Share on other sites More sharing options...
Members BottomHeavyKate Posted August 27, 2008 Members Share Posted August 27, 2008 OK Thanks !Thing is i just bought the amp 2 days ago. And i played very quietlyIs it expensive (or even possible) to replace the transformer ?Sorry for my ignorance, i never had any pb with my amps in the past, so i don't know much about it... I had a Hartke that did that to me.....I returned it..... 2 days? Get your money back Link to comment Share on other sites More sharing options...
Members Super Bass Posted August 27, 2008 Members Share Posted August 27, 2008 Hey man, look We're both living in Ireland, and suffering from bad quality amps from the UK. Doesn't that smell like conspiracy ??? I know, damn English! Actually I got rid of my old crappy amp a year or so ago, I'm playing a Genz Benz now. No problems like that with this amp! Link to comment Share on other sites More sharing options...
Members Juloni Posted August 28, 2008 Author Members Share Posted August 28, 2008 Dude you're a genius !!! I think it worked ! I only played for 20 mins, and will do more testing later on to confirm this positive impression. Thanks a million Link to comment Share on other sites More sharing options...
Members Juloni Posted August 28, 2008 Author Members Share Posted August 28, 2008 I know, damn English! Actually I got rid of my old crappy amp a year or so ago, I'm playing a Genz Benz now. No problems like that with this amp! Dude you're a genius !!! I think it worked ! I only played for 20 mins, and will do more testing later on to confirm this positive impression. Thanks a million Link to comment Share on other sites More sharing options...
Members Super Bass Posted August 28, 2008 Members Share Posted August 28, 2008 No problem, happy to help! Link to comment Share on other sites More sharing options...
Members Juloni Posted August 28, 2008 Author Members Share Posted August 28, 2008 I had a Hartke that did that to me.....I returned it..... 2 days? Get your money back that's the first thing i tried, but the guy said it was not his problem, that the amp was fine when he had it, and he s not answering me anymore. i think he should just prey for not meeting me on the streets from now Link to comment Share on other sites More sharing options...
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