For the electronics enthusiast a tube audio amplifier makes for an interesting and unusual project, and for that reason it’s one tackled by many. [Keri Szafir] is no exception, and she’s ...

Making vacuum tubes with all the proper equipment ... Speaking of charm, we just love the amp these tubes went into. Built in 1920s breadboard-style, the features some beautiful vintage ...

Poland-based Feliks Audio specializes in high-end vacuum tube audio products including a line of rather unique headphone ...

If you said yes to all of the above, then Astell & Kern’s flagship digital audio player — the SP3000T — is about to make your sonic dreams come true.  Analog stalwarts write love letters to the warm, ...

Generally, most amplifiers use either vacuum tubes (tube amps) or transistors (solid state amps) to translate the current ...

The C2800 Vacuum Tube Preamplifier features methodically ... the C55 and C2800 offer a lot of flexibility for connecting to power amplifiers. Their design allows for bi-amping configurations ...

Thinking out loud, Pierce pointed out that just as the vacuum tube had transconductance, the new amplifier had the electrical property of transresistance. He also knew that a number of electronic ...

Kelly suspected that solid state science might provide a new kind of amplifier to replace the vacuum tube in AT&T's phone system. The tubes amplified voice signals as they traveled through the ...