Shootout of Nos 6sn7 tubes
shkong... According to my research the early Melz tubes have the 1578 lettering. There were two factories producing Russian tubes and the holy grail tubes have multiple holes on the plates. https://www.ebay.com/itm/133366164135 |
@lowrider57 If the listed price is 150$ instead of 250$, then I may take the risk. But I will wait for the tube coming from Ukraine. As writing this, I am happy with sound out of KR vt231 which sound sweet, laid back and punch. By the way I use demagnetizaion track for speedy burn in. It seems to work well. Thomas |
I found that Nos12sn7 tubes are available at lower price.Did you change the filament voltage on the amp concerned to suit the12SN7? All other things being equal, the filament voltage shouldn’t make the slightest bit of difference to the sound. You were hearing the difference between the tube types, not the difference between absolutely otherwise identical tubes using different filament voltages. To make a sweeping statement that 6SN7 tubes are ‘fuller and sweeter’ than 12SN7s, or 8SN7s for that matter matter without conducting a series of tests using controlled samples is simply not credible. |
