I'm wondering if anyone has advice or experience on the following subjects.
First, I'd like to point out that I'd like to try building an all tube, transformer coupled, Class-A pre-amp using NO CAPACITORS in the signal path. However, this doesn't mean I won't use them, if need be. I am willing to spend extra $$ on an additional intermediate transformer stage (if necessary) in order to eliminate any coupling caps that would normally be in place with a standard pre-amp design.
One of the biggest challenges is the output transformer interfacing with the last amplification stage. Jensen transformer company says that none of their transformers can be used as configured for a direct plate driven transformer (having the plate current run through it) without a coupling capacitor--which then would be a standard, more common design. I was hoping to replace the plate resistor for the final tube stage with a transformer, thereby eliminating an output coupling capacitor.
Regardless, I would still conisder a circuit design that DOES use caps. Does anyone also know of (or have a schematic for) a high-end tube pre-amp design (like UniversalAudio (LA610 or Solo610 ?) or a Hamptone tube preamp, etc.)?
Thanks very much for any feedback or suggestions.
First, I'd like to point out that I'd like to try building an all tube, transformer coupled, Class-A pre-amp using NO CAPACITORS in the signal path. However, this doesn't mean I won't use them, if need be. I am willing to spend extra $$ on an additional intermediate transformer stage (if necessary) in order to eliminate any coupling caps that would normally be in place with a standard pre-amp design.
One of the biggest challenges is the output transformer interfacing with the last amplification stage. Jensen transformer company says that none of their transformers can be used as configured for a direct plate driven transformer (having the plate current run through it) without a coupling capacitor--which then would be a standard, more common design. I was hoping to replace the plate resistor for the final tube stage with a transformer, thereby eliminating an output coupling capacitor.
Regardless, I would still conisder a circuit design that DOES use caps. Does anyone also know of (or have a schematic for) a high-end tube pre-amp design (like UniversalAudio (LA610 or Solo610 ?) or a Hamptone tube preamp, etc.)?
Thanks very much for any feedback or suggestions.