swing_girl Posted August 17, 2013 Share Posted August 17, 2013 I recently bought a DT50 112, love the sound and feel but the noise / hum when even nothing is plugged in is very annoying. It is about as loud as a window air conditioner working hard. Since I live in a place where the shops do not do exchange or refund, I have to live with it or sell it, which I don't want to as I like the sound. Is there any way to deal with this noise? I am plugging it in the wall with no other electric appliances nearby. Quote Link to comment Share on other sites More sharing options...
TheRealZap Posted August 17, 2013 Share Posted August 17, 2013 you might try swapping out the tubes... i've heard that can make a big difference in how quiet the amp is. Quote Link to comment Share on other sites More sharing options...
Crusty_Old_Rocker Posted August 18, 2013 Share Posted August 18, 2013 Try taking it somewhere else and plug it in. Try a few different locations because this will let you know if it's the amp or the environment it's that's creating the problem. You may just need a power filter. Cheers, Crusty 1 Quote Link to comment Share on other sites More sharing options...
spaceatl Posted August 18, 2013 Share Posted August 18, 2013 I changed the 12AX7s in my DT50 to using a GT-SAGAX7 for the inverter and a Mesa SPAX7 for the buffer...Dramatic difference. I have not had very good luck with those EH 12AX7s that come stock...They always seem to be quite noisy...At least the ones I have gotten have been. 1 Quote Link to comment Share on other sites More sharing options...
themager Posted March 6, 2015 Share Posted March 6, 2015 I know this is an old thread, but I recently bought a DT50 112 online as the price was fantastic. It did have quite a bit of white noise, especially on the British Chime configuration, class A, no negative feedback loop. I found that channel unplayable. Read this thread and got around to finally changing the 12AX7s (Russian Electroharmonix) to basic Slovakian JJs ECC83s (Tesla remake). Made a nice difference - won't say it was a huge difference, but brought the noise to a reasonable level. I've attached a picture showing the before and after noise level taken with my iphone - the impact is clear. Quote Link to comment Share on other sites More sharing options...
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