I've tried the following tubes;
Stock chinese 12AT7-dry and quite harsh
Brimar 13D5-not much better than stock
RCA 12AU7 cleartop- nice tube, good bass extension and great highs.
RCA 12AU7A- same as the cleartop.
Tunsgram ECC81-much more interesting. similar sound as RCA cleartops with more gain
Sylvania 12AT7WA green label-now were talking great tube.good bass extension,lush mids and crystal clear highs.
Sylvania JHS 12AT7WA-even better than the above tube. It was described to me as the Bing Crosby sound. It is that.
Last I tried a pair of GT12AX7M that I had originally had in my TAD-1000 amps. This was quite a shock as it was very near to the Sylvania JHS tubes, readily available, cheap, and more gain.
Yes I've been very busy this past year
Stock chinese 12AT7-dry and quite harsh
Brimar 13D5-not much better than stock
RCA 12AU7 cleartop- nice tube, good bass extension and great highs.
RCA 12AU7A- same as the cleartop.
Tunsgram ECC81-much more interesting. similar sound as RCA cleartops with more gain
Sylvania 12AT7WA green label-now were talking great tube.good bass extension,lush mids and crystal clear highs.
Sylvania JHS 12AT7WA-even better than the above tube. It was described to me as the Bing Crosby sound. It is that.
Last I tried a pair of GT12AX7M that I had originally had in my TAD-1000 amps. This was quite a shock as it was very near to the Sylvania JHS tubes, readily available, cheap, and more gain.
Yes I've been very busy this past year