I am going to build a SimpleSE (www.tubelab.com). I think that I can build a great amp for relatively little money and get between 4-8W.
I have sourced the parts, but am curious about one thing - the current rating of the power transformer. On his website, George presents a list of tubes and configurations with estimated power output and current. If I want to run the SimpleSE at 400V at B+ at 81mA current, then I should get something like 5.45W.
Now George has recommended the Allied 6K7VG transformer which is 750V center-tapped at 150mA. OK, so if I run a stereo amp using two KT88's, at 81mA, then I draw too much current for a single Allied 6K7VG don't I??? Never mind, the current drawn by the input tube. Is this correct? Does the current rating of the trafo have to be greater than the current drawn by the circuit? I always thought it does.
George recommends choosing components that match one of the actual configurations that he's already built, but for all my stupidity, I cannot find any presented with sufficient detail on his website - I am sure they're there somewhere!
If anyone else has built a two-channel SimplSE that uses a shared PSU, please could you let me know your specs.
Thanks,
Charlie
I have sourced the parts, but am curious about one thing - the current rating of the power transformer. On his website, George presents a list of tubes and configurations with estimated power output and current. If I want to run the SimpleSE at 400V at B+ at 81mA current, then I should get something like 5.45W.
Now George has recommended the Allied 6K7VG transformer which is 750V center-tapped at 150mA. OK, so if I run a stereo amp using two KT88's, at 81mA, then I draw too much current for a single Allied 6K7VG don't I??? Never mind, the current drawn by the input tube. Is this correct? Does the current rating of the trafo have to be greater than the current drawn by the circuit? I always thought it does.
George recommends choosing components that match one of the actual configurations that he's already built, but for all my stupidity, I cannot find any presented with sufficient detail on his website - I am sure they're there somewhere!
If anyone else has built a two-channel SimplSE that uses a shared PSU, please could you let me know your specs.
Thanks,
Charlie