waynepunkdude Posted October 13, 2013 Share Posted October 13, 2013 I think I put the wrong Spekon cable into my OBT, I heard a pop and a bit of smoke came out, I've just opened it up to find a capacitor has blown. See pic. Is this an easy repair? Quote Link to comment Share on other sites More sharing options...
Ou7shined Posted October 13, 2013 Share Posted October 13, 2013 As long as you can find it's value and as long as nothing else went, yes. Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted October 13, 2013 Author Share Posted October 13, 2013 [quote name='Ou7shined' timestamp='1381691470' post='2242469'] As long as you can find it's value and as long as nothing else went, yes. [/quote] I've got the cap and I've had a good look through, can't see any other problems. Was still working in the 3 seconds it took me to turn the plug off. Quote Link to comment Share on other sites More sharing options...
bobbass4k Posted October 13, 2013 Share Posted October 13, 2013 Check the track on both sides, it's not always obvious when it goes, check it with a multimeter if you have one. Get rid of any carbon on the board (just scratch it off with a screwdriver), are you sure you've got the right value, it won't necessarily be the same as the one next to it. Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted October 13, 2013 Author Share Posted October 13, 2013 [quote name='bobbass4k' timestamp='1381695290' post='2242554'] Check the track on both sides, it's not always obvious when it goes, check it with a multimeter if you have one. Get rid of any carbon on the board (just scratch it off with a screwdriver), are you sure you've got the right value, it won't necessarily be the same as the one next to it. [/quote] Sure about the value as I have the wrap that was around it, I won't do it my self though, I'll take it to my tech. Quote Link to comment Share on other sites More sharing options...
3below Posted October 13, 2013 Share Posted October 13, 2013 Pretty impressive effort. The pic is superb, I will use that with my students, just reminding them about polarised caps. Much good advice above, hopefully simple replacement will result in good to go amp. Hope all ends well. As an afterthought, you can get nonpolarised electrolytic capacitors. These will not be terminated by incorrect connection. Whether the values you want are available is another matter. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted October 14, 2013 Share Posted October 14, 2013 Think a run of these used to do that, the pic is sort of familiar. With electrolytics, you can up the voltage valve if it will fit in to be more durable, you can also up capacitance a bit and it won't do harm, opens up replacement options some. Same one went here: http://www.talkbass.com/forum/f15/orange-terror-bass-500-exploded-917680/ Quote Link to comment Share on other sites More sharing options...
Happy Jack Posted October 14, 2013 Share Posted October 14, 2013 [quote name='waynepunkdude' timestamp='1381690672' post='2242441'] I think I put the wrong Spekon cable into my OBT [/quote] Can't help with the cap, Wayne, but I'm curious ... how did using the "wrong" Speakon do this? Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted October 14, 2013 Author Share Posted October 14, 2013 I'm not sure but it's the only thing I can think of. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted October 14, 2013 Share Posted October 14, 2013 Think its the wrong cap in the amp, and you've been lucky until now. Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted October 14, 2013 Author Share Posted October 14, 2013 [quote name='Mr. Foxen' timestamp='1381753493' post='2243121'] Think its the wrong cap in the amp, and you've been lucky until now. [/quote] By the looks of it, the lead I used reversed the polarity. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted October 14, 2013 Share Posted October 14, 2013 [quote name='waynepunkdude' timestamp='1381755672' post='2243162'] By the looks of it, the lead I used reversed the polarity. [/quote] That would just make the speaker go in the other direction with regards to the voltage swing. Electrolytic capacitors aren't going to be very closely related to the output jack, going to be via a transistor at least, so killing the cap would require killing the transistor on the way. Looks much more like the known issue with a generation of Orange Terrors, the later ones with the gain control that works without valve swapping are supposed to have sorted it. Quote Link to comment Share on other sites More sharing options...
RandomBass Posted October 14, 2013 Share Posted October 14, 2013 Depending where that cap is in the schematic, the only cable problem I could imagine would be a shorted one. A reversed polarity (?) cable would/should only make the speaker go in-then-out, instead of out-then-in. Or vice versa, depending on the weather. Quote Link to comment Share on other sites More sharing options...
Happy Jack Posted October 14, 2013 Share Posted October 14, 2013 [quote name='Mr. Foxen' timestamp='1381756103' post='2243171'] Looks much more like the known issue with a generation of Orange Terrors, the later ones with the gain control that works without valve swapping are supposed to have sorted it. [/quote] Hmmmm ... that doesn't exactly fill me with joy! Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted October 14, 2013 Author Share Posted October 14, 2013 [quote name='Happy Jack' timestamp='1381769893' post='2243470'] Hmmmm ... that doesn't exactly fill me with joy! [/quote] Been quoted £25 postage and £45 PH for labour from Orange. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted October 14, 2013 Share Posted October 14, 2013 Hmm, Laney only quoted £30/hour labour, and sort of implied it was going to be Lyndon Laney himself that would do the work (I was asking regarding an older laney he probably made). Quote Link to comment Share on other sites More sharing options...
BigRedX Posted October 14, 2013 Share Posted October 14, 2013 [quote name='waynepunkdude' timestamp='1381770868' post='2243500'] Been quoted £25 postage and £45 PH for labour from Orange. [/quote] That seems a bit steep, especially if it really is due to a design fault in the amp. Quote Link to comment Share on other sites More sharing options...
3below Posted October 14, 2013 Share Posted October 14, 2013 Wayne - DIY (destroy it yourself) for that kind of money, should be a simple easy job. What do you think? Good advice from Mr Foxen, you can use higher voltage and capacitance values to good effect. Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted October 14, 2013 Author Share Posted October 14, 2013 I'm dropping it at my tech tomorrow, he is an ex-Orange tech (retired) £30 plus he'll analyse to see if there are any other problems. Quote Link to comment Share on other sites More sharing options...
Billy Apple Posted October 14, 2013 Share Posted October 14, 2013 At least these can be fixed. But what would happen if one of the bigger ones next to it went? Blow it apart completely? Quote Link to comment Share on other sites More sharing options...
bobbass4k Posted October 14, 2013 Share Posted October 14, 2013 [quote name='Billy Apple' timestamp='1381785648' post='2243868'] At least these can be fixed. But what would happen if one of the bigger ones next to it went? Blow it apart completely? [/quote] Nah, caps tend to be all flash, one of the big ones would produce a pretty impressive bang, but they wouldn't explode with enough force to really do much physical damage. The main damage would be to the board, it would probably take a lot of track with it and burn some big chunks out of the board. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted October 15, 2013 Share Posted October 15, 2013 Modern ones are made to jsut eject a leg if they go. Old ones go really well, spewing foaming wax stuff and billows of white smoke. http://www.youtube.com/watch?v=Ubw3cHM4YxU Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted October 15, 2013 Author Share Posted October 15, 2013 Have sent Orange a strongly worded email after have a nice chat with my legal adviser. Quote Link to comment Share on other sites More sharing options...
Roland Rock Posted October 15, 2013 Share Posted October 15, 2013 [quote name='waynepunkdude' timestamp='1381827655' post='2244137'] Have sent Orange a strongly worded email after have a nice chat with my legal adviser. [/quote] Is this on the strength that the design of the old ones make them 'not fit for purpose' under the Sale of Goods Act? Quote Link to comment Share on other sites More sharing options...
Happy Jack Posted October 15, 2013 Share Posted October 15, 2013 [quote name='Mr. Foxen' timestamp='1381796131' post='2243990'] Modern ones are made to jsut eject a leg if they go. Old ones go really well, spewing foaming wax stuff and billows of white smoke. [media]http://www.youtube.com/watch?v=Ubw3cHM4YxU[/media] [/quote] Loving those Blake's Seven SFX ... Quote Link to comment Share on other sites More sharing options...
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