Members clund Posted October 6, 2010 Members Share Posted October 6, 2010 I am a proud owner of a H&K Trilogy for about 3 years now - and it still has the original factory TAD tubes (I know, I'm probably WAY over due). Getting ready to do a Re-Tube... I noticed that the middle two EL34 tubes have some brown stains inside the top part of the tube... (I will take some pictures tonight) Any idea's here? or are they just going bad. I was most likely going to go with JJ EL34's but was thinking of E34L or KT77s. (Probably from EuroTubes.com) Anyone have any experience with these tubes? or Biasing the H&K Trilogy (probably not) Thanks for any help...Corey Link to comment Share on other sites More sharing options...
Members Matt75 Posted February 27, 2021 Members Share Posted February 27, 2021 Hi Corey, did you find out the reason for this? Mine are the same.. Thanks Matt Link to comment Share on other sites More sharing options...
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