Hi, This is my first post, I have been working on tube amps since I worked at a TV repair shop back in the 70's. I recently built a 300B amp based on Skunkie designs, https://www.skunkiedesigns.com/300b , I altered the design, instead of DC filaments, I used AC filaments on the 300b tubes, the AMP came out better than expected, no hum at all. I used Hammond transformers, which I believe also help make some improvement.
I also purchased the Digilent Analog Discovery 3 board, which I use with the Audio Analyzer Suite. This gives me somewhat accurate THD vs Power reading of any amp (plus many other features, like freq resp, IMD, etc), it is very helpful in seeing how well an amp actually performs from low power to full power and beyond. It recently help me find a bad signal tube that was crapping out at about half power. It too me about 5 minutes to find it, this is my favorate tool now.
I am currenly looking for a 25-30W push-pull, point to point wired stereo amp, that I would like to build this fall, if anyone has any ideas, please let me know.
Norm
I also purchased the Digilent Analog Discovery 3 board, which I use with the Audio Analyzer Suite. This gives me somewhat accurate THD vs Power reading of any amp (plus many other features, like freq resp, IMD, etc), it is very helpful in seeing how well an amp actually performs from low power to full power and beyond. It recently help me find a bad signal tube that was crapping out at about half power. It too me about 5 minutes to find it, this is my favorate tool now.
I am currenly looking for a 25-30W push-pull, point to point wired stereo amp, that I would like to build this fall, if anyone has any ideas, please let me know.
Norm
Last edited:
Welcome to diyAudio. :^)
You will find many examples of PP amps in that power range, the one that comes to the top of my head is the EL34 Baby Huey.
dave
You will find many examples of PP amps in that power range, the one that comes to the top of my head is the EL34 Baby Huey.
dave
Thank you for the Baby Huey amp, it looks interesting, I guess I could build it using point to point wiring (which I prefer)
Welcome guy! Take my five!
Perhaps if you have stored TV parts, a push pull of 6DQ6's or similar may go.
Perhaps if you have stored TV parts, a push pull of 6DQ6's or similar may go.