Al - I have the Signature version of the 70/70 with the enclosed chasis, so I'm not sure the non-signature version would be the same. I say this because I shared this tweak with Audiogoner "Waltersalas"... and he was unable to get his 70/70 mk III to work the way I was able to.
In my case, I removed all 4 output tubes closest to the front of the amp, leaving only the 4 output tubes closest to the rear of the amp. Brent said removing either the front or back row of 300B's would work.
Give it a try and let me know if it works for you.
It sounds so good this way, that I will be sticking with this 30/30 configuration as long as I have efficient speakers like the Daedalus.
In my case, I removed all 4 output tubes closest to the front of the amp, leaving only the 4 output tubes closest to the rear of the amp. Brent said removing either the front or back row of 300B's would work.
Give it a try and let me know if it works for you.
It sounds so good this way, that I will be sticking with this 30/30 configuration as long as I have efficient speakers like the Daedalus.