Martin,
Looking at the specs, the aY7 is doing what I envisioned from the 5751. In other words it sounds like the aY7 is doing exactly what I wanted from that just a little bit less crunch and grind.
Fenderman - YES its got a fat midrange and very smooth. In fact after deciding to go with the aT7, I had changed the 500pF to about 380pF and they are polystyrenes...with this tube if I stay with it, I may go back upward a bit but I think just raising the presence and treble may do the trick. So far, a fun trial.
Quieten the Express
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Re: Quieten the Express
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Be sure your tinfoil hat has a good low impedance ground.
Be sure your tinfoil hat has a good low impedance ground.