I have Darkvoice and Eufonika H5 and I am in USA (110/120V outlet). These amplifier are obviously made recently and most likely designed to take 450V 6SN7GTA/B driver tubes.
What would be the effect of using 6SN7GT tubes rated at 300V anode voltage instead of 6SN7GTA/B ? Shortened tube life, or worse, damage to the amplifiers ? I read somewhere that these are max rated limit and not the actual voltage in use.
In case it matters - I use these amplifiers not just for running headphones but also active speakers via RCA line out.
Thanks!
What would be the effect of using 6SN7GT tubes rated at 300V anode voltage instead of 6SN7GTA/B ? Shortened tube life, or worse, damage to the amplifiers ? I read somewhere that these are max rated limit and not the actual voltage in use.
In case it matters - I use these amplifiers not just for running headphones but also active speakers via RCA line out.
Thanks!
It all depends on how these amps are setup and the voltage they apply to the plate of the driver tube. Remember this rating is for the actual voltage across the tube, not the voltage on the other side of the plate load resistor etc.
According to schematics of Darkvoice(-like) amplifiers that can be found on the web, B+ is only 150 V. All types of 6SN7's can cope with this easily.
That is really good to know. I ran across posts out there saying that they had no trouble using 6SN7GT with DV so this further validates that...good thing amp makers are considerate. I also own Eufonika H5 and asked its maker about this who said it is no problem at all. Hooray!