My last entry on this thread was 2011.
So and update is in order. I retired ( if that even exists) in 2015 and although love the signal processors, have gone all analog target designs.
My 100% push since 2016 has been low voltage tube-ss hybrids.
I generally use the tube in fb loop with op-amp and have learned a lot along the way.
Pentodes and triodes work just fine at 30v potential (+-15VDC). No positive grid drive is used.
My test equipment is upgraded now with Motu M4 for spectra analysis. New scope and linear bench power supplies too.
For power amp I use the tpa3118 almost 100%.
Maybe one day re-visit the dspic32 but having too much fun all analog.
Hot on to do list is re-visit Germanium. Maybe an all discrete tube-Germanium hybrid will materialize.
-cheers
So and update is in order. I retired ( if that even exists) in 2015 and although love the signal processors, have gone all analog target designs.
My 100% push since 2016 has been low voltage tube-ss hybrids.
I generally use the tube in fb loop with op-amp and have learned a lot along the way.
Pentodes and triodes work just fine at 30v potential (+-15VDC). No positive grid drive is used.
My test equipment is upgraded now with Motu M4 for spectra analysis. New scope and linear bench power supplies too.
For power amp I use the tpa3118 almost 100%.
Maybe one day re-visit the dspic32 but having too much fun all analog.
Hot on to do list is re-visit Germanium. Maybe an all discrete tube-Germanium hybrid will materialize.
-cheers