I'm late to this forum, but recently bought an ASL Mini Phono. I'm a big fan of tube phono stages and figured this was a bargain for $200. I'm not aware of any other $200 tube phono stage with a decent power supply like this one has. Mainly, I want to see how good this unit can sound with some modest upgrades.
I'm going to replace the cheap Bennic caps with 0.1 uF KY40 for the input and 1.0 uF Dynamicaps for the output. I'm also going to change all the resistors to low noise PRP and swap in Silver Mica and Relcap for the RIAA caps. I'll also upgrade the cheap electrolytics with low ESR Panasonics. All told, I plan to spend about $75 on parts. If it compares favorably with a Bottlehead Seduction, I'll be very happy.
I'm sketching out the circuit diagram. I'd be happy to share it with anyone along with my modifications which are easy to do. Just shoot me a message.
-Mark
I'm going to replace the cheap Bennic caps with 0.1 uF KY40 for the input and 1.0 uF Dynamicaps for the output. I'm also going to change all the resistors to low noise PRP and swap in Silver Mica and Relcap for the RIAA caps. I'll also upgrade the cheap electrolytics with low ESR Panasonics. All told, I plan to spend about $75 on parts. If it compares favorably with a Bottlehead Seduction, I'll be very happy.
I'm sketching out the circuit diagram. I'd be happy to share it with anyone along with my modifications which are easy to do. Just shoot me a message.
-Mark