Deepdark
Well-known member
Hi all
I'm looking to make an EQP1A but with a cascode amp stage. The goal is to get rid of the interstage transformer and the feedback circuit from the output transformer. All of this in a way to save some $, simplifying the circuit and made it more diy friendly to use with a variety of transformer. I know Gyraf made a SRPP design. But since I'm in a Learning stage in tube world, why not trying to designing something of my own
first thing first, I would like to know if it's a good candidate for such an task? Assuming the filtre section will eat up around 20db, and around what, 6db per transformer??, I know the cascode can deliver really high gain. I consider 12AX7 in my design. I would like to know if it looks ok. Any bit of informations is welcom, since I'm in a Learning stage, I'd like to learn as much as I can
Looking at the transformer, I don't know how to select the right one (impedance Wise). Looking at the anode load resistor (100K) should I consider it as the circuit impedance?
I'm looking to make an EQP1A but with a cascode amp stage. The goal is to get rid of the interstage transformer and the feedback circuit from the output transformer. All of this in a way to save some $, simplifying the circuit and made it more diy friendly to use with a variety of transformer. I know Gyraf made a SRPP design. But since I'm in a Learning stage in tube world, why not trying to designing something of my own
first thing first, I would like to know if it's a good candidate for such an task? Assuming the filtre section will eat up around 20db, and around what, 6db per transformer??, I know the cascode can deliver really high gain. I consider 12AX7 in my design. I would like to know if it looks ok. Any bit of informations is welcom, since I'm in a Learning stage, I'd like to learn as much as I can
Looking at the transformer, I don't know how to select the right one (impedance Wise). Looking at the anode load resistor (100K) should I consider it as the circuit impedance?