Hello everyone. Recently, while going through my ever increasing stash of electronic hobby parts (I swear these things breed like Tribbles when I am not around), I found items I had forgotten that I had! Imagine that. Fast forward a few weeks... while flying to "Vegas for the annual CES, I came across a thread at DIYaudio on the Krell KSA50. Looking through all the pictures and images, I realized I had most of the expensive parts at home already - transformers, power supply caps, heat sinks and most, if not all, of the transistors needed in the circuit.
The thread is HUGE and spans +8000 (8k) replies over the years. http://www.diyaudio.com/forums/solid-state/31077-krell-ksa-50-pcb.html
This particular Krell amp (KSA50) is supposedly still a benchmark today. I like simple designs and especially Class A amps. I messed around with a few DIY Nelson Pass designs back in the early 2000's (Zen and Son of Zen) and they sounded pretty good.
I have very similar transistors from the original Krell design (2SA1370/2SC3467, 2SA1306B/2SC3298B, 2SA1302/2SC3281) and I am a little bit excited to hear what this beast is going to sound like. The clone at DIYaudio uses more common MPSA42 / 92 general purpose transistors, as well as the MJE15032/33 as drivers. Driver boards were once available, but I believe they have all dryed up. I am going to breadboard a driver board first and see what transistor's sound better.
The thread is HUGE and spans +8000 (8k) replies over the years. http://www.diyaudio.com/forums/solid-state/31077-krell-ksa-50-pcb.html
This particular Krell amp (KSA50) is supposedly still a benchmark today. I like simple designs and especially Class A amps. I messed around with a few DIY Nelson Pass designs back in the early 2000's (Zen and Son of Zen) and they sounded pretty good.
I have very similar transistors from the original Krell design (2SA1370/2SC3467, 2SA1306B/2SC3298B, 2SA1302/2SC3281) and I am a little bit excited to hear what this beast is going to sound like. The clone at DIYaudio uses more common MPSA42 / 92 general purpose transistors, as well as the MJE15032/33 as drivers. Driver boards were once available, but I believe they have all dryed up. I am going to breadboard a driver board first and see what transistor's sound better.
