Mar
25
Simple Low Resistance Measurement
March 25, 2011 | Leave a Comment
This is a question that we get often: I measured the direct current resistance (DCR) of xyz using a multimeter and the result is higher than what the data sheet says it should be! Since most of our readers are audio enthusiasts, xyz is typically a speaker, but it could be any low resistance device [...]
Mar
24
Vacuum Tube Amps
March 24, 2011 | Leave a Comment
Until now, Vacuum Tube Amplifiers have been the domain of esoteric audiophiles with large budgets and even larger egos. Related PostsHashimoto Sansui Vacuum tube transformer vacuum tube transformers …All Tube Amplifiers211/845
Mar
6
Tube amplifiers, vacuum tube amplifiers, distortion-free speaker systems and more are the specialty of this boutique electronics firm renowned for its innovation in audio research. Related PostsAll Vacuum Tube AmplifiersAll Tube AmplifiersHashimoto Sansui Vacuum tube transformer vacuum tube transformers …
Mar
6
THE BEST TUBE GUITAR AMP AROUND … The designers, the design. High Frequency design Andalucía, s.l. We are a laboratory with a vast experience in High Frequency technology in … Related PostsAre tube amplifiers ( for guitar ) better than solid states?Classic Tube AmpsHow can I play guitar backtracks through an tube amplifier?
Feb
14
Tube Sonic Amps
February 14, 2011 | Leave a Comment
Tube-Sonic Audio is dedicated to providing its customers with the finest handbuilt all-tube guitar amplifiers and Custom built tube hi-fi amplifiers Related Posts12AX7FRENZEL Tube AmpsHoffman Amplifiers, Tube amplifier parts, tube amps, tubes
Feb
14
Hoffman Amplifiers, Tube amplifier parts, tube amps, tubes
February 14, 2011 | Leave a Comment
tube amp parts, tubes, guitar tube amps, vintage tube amp parts, vintage tube amp parts, new and vintage tube amps, tubes, tube amps. Related PostsVintage Stereo EquipmentClassic Tube AmpsVintage Tube Amplifiers | Tubes Amplifier
Feb
8
DIY Sealed Jordan JX92S Bookshelf Speaker
February 8, 2011 | Leave a Comment
A while back I purchased a pair of Jordan JX92S fullrange speakers. At the time I purchased them I didn’t really know what I was going to do with them, but having read so many positive comments about these drivers, I really wanted to hear them for myself. At $180 each, the drivers are costly, [...]
Dec
1
Moving Magnet Phono Preamp Kit
December 1, 2008 | Leave a Comment
Mark in Australia has put together a moving magnet phono preamplifier using a electronics hobby kit. The phono preamp kit provides everything you need except minus an enclosure and a power supply (AC walwart). The circuitry is contained on a printed circuit board (PCB) and consists of operational amplifiers (opamps) with up to three equalization [...]
Nov
25
DIY 12AU7 Tube Preamplifier
November 25, 2008 | Leave a Comment
This is Alan’s mini-tube preamplifier. It is a very simple tube preamplifier project that will work with the 12AX7 or 12AU7 vacuum tubes, both of which are fairly common. The preamp is built using primarily parts that Alan had on hand. To make a real frugal build, the preamp can be built using 12V transformers [...]
Nov
9
6T9 Compactron Push-Pull Tube Amp
November 9, 2008 | Leave a Comment
Steve has sent us details on his latest vacuum tube amplifier project. Steve tells us that this great looking vacuum tube amplifier project was inspired by the Spare Time Gizmo single-ended 6T9 tube amp kit from 2004. The circuit ideas for the push-pull output stage came from his EICO HF-81 and RCA Receiving Tube Manual. [...]