I was selling a bunch of odd tubes and have a few NOS 19J6 medium-mu twin triodes left.
Trying to figure out what they were good for, I discovered Pete Millett's "Starving Student Headphone Amplifier" - a hybrid project using MOSFETs driven by the triodes. Kinda like a NYAL Moscode amp, only smaller.
Here is a link to photos, and from there, complete parts list, schematic, etc. http://www.pmillett.com/starving_gallery.htm
I thought . . . perfect! . . . since I'm now a starving student (paying for 3 in college, 3 cars, etc.) I'll build this.
I found this cute little enclosure from China on eBay for about $15 delivered. It's tiny, and nothing really fits right without some real effort, but I couldn't resist the challenge. The 48V external power supply cost something like 12 bucks delivered from China as well.
For example, I dug up a pair of RCA input jacks from my junk box, molded into a single piece of plastic, that will fit in the holes. I made a standard SPDT switch fit into the aperture (JB Weld is gonna help here), and the power jack will be soldered to a PCB that will be anchored to the bottom panel. I had a small stereo jack that will work in the hole provided, but putting a 1/4" standard jack will require some metal work.
Anyway . . . 'cause I really hate doing my homework, and I have ADHD . . .
Trying to figure out what they were good for, I discovered Pete Millett's "Starving Student Headphone Amplifier" - a hybrid project using MOSFETs driven by the triodes. Kinda like a NYAL Moscode amp, only smaller.
Here is a link to photos, and from there, complete parts list, schematic, etc. http://www.pmillett.com/starving_gallery.htm
I thought . . . perfect! . . . since I'm now a starving student (paying for 3 in college, 3 cars, etc.) I'll build this.
I found this cute little enclosure from China on eBay for about $15 delivered. It's tiny, and nothing really fits right without some real effort, but I couldn't resist the challenge. The 48V external power supply cost something like 12 bucks delivered from China as well.
For example, I dug up a pair of RCA input jacks from my junk box, molded into a single piece of plastic, that will fit in the holes. I made a standard SPDT switch fit into the aperture (JB Weld is gonna help here), and the power jack will be soldered to a PCB that will be anchored to the bottom panel. I had a small stereo jack that will work in the hole provided, but putting a 1/4" standard jack will require some metal work.
Anyway . . . 'cause I really hate doing my homework, and I have ADHD . . .
Last edited: