Helderius Posted August 27, 2017 Share Posted August 27, 2017 Hi, My SWR is starting to overdrive a little. Could this be a tube issue? What tubes would you recommend? Cheers Quote Link to comment Share on other sites More sharing options...
Dan Dare Posted August 28, 2017 Share Posted August 28, 2017 Like for like unless you know what you're doing. Get expert advice. Quote Link to comment Share on other sites More sharing options...
Helderius Posted August 28, 2017 Author Share Posted August 28, 2017 [quote name='Dan Dare' timestamp='1503895196' post='3361349'] Like for like unless you know what you're doing. Get expert advice. [/quote] Hi Dan, the amplifier is in Portugal, it has been very hot. I wonder if that can not affect either. I hope it's nothing serious Quote Link to comment Share on other sites More sharing options...
BassBod Posted August 28, 2017 Share Posted August 28, 2017 Swapping the valve is easy and pretty cheap, and there is only one - try that first. My experience is that preamp valves go on for many many years, and usually just stop working after getting banged about in transport. I'd also check the speakers/tweeter. Its quite a lot of power into some not very great speakers (by current standards) so its easy to damage them by putting too much into them. The original version was something like 240w but the Super version upper that quite a bit..something like 350w into the internal 2x10" cab. SWR's always get hot (by design), especially those without internal fans - if the valve makes no difference and the speakers seem ok then get it checked over for failing components. Quote Link to comment Share on other sites More sharing options...
Helderius Posted August 28, 2017 Author Share Posted August 28, 2017 (edited) [quote name='BassBod' timestamp='1503934423' post='3361655'] Swapping the valve is easy and pretty cheap, and there is only one - try that first. My experience is that preamp valves go on for many many years, and usually just stop working after getting banged about in transport. I'd also check the speakers/tweeter. Its quite a lot of power into some not very great speakers (by current standards) so its easy to damage them by putting too much into them. The original version was something like 240w but the Super version upper that quite a bit..something like 350w into the internal 2x10" cab. SWR's always get hot (by design), especially those without internal fans - if the valve makes no difference and the speakers seem ok then get it checked over for failing components. [/quote] Thanks a lot, that was very helpfull. Could you ecommend any valve? Edited August 28, 2017 by Helderius Quote Link to comment Share on other sites More sharing options...
BassBod Posted August 28, 2017 Share Posted August 28, 2017 Don't spend much, a modern Sovtek or Electro Harmonix 12AX7 would be fine. The original was a Groove Tube..but they just re-branded modern valves, mainly Chinese production. They run some production now, but not back then. SWR and Groove Tubes were close to each other, hence SWR's generally shipped with them. Quote Link to comment Share on other sites More sharing options...
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