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PCB: 12AU7 (ECC82) / IRF510 Headphone Amp After a few years the circuit has been modified from my original 12AU7 Tube / IRF612 MOSFET Hybrid Headphone Amplifier build to fit on a single layer printed circuit board (PCB). Although it can easily be constructed point-to-point on a 750 hole proto board, a PCB is a cost effective upgrade. Hig h-End OTL Tube Amp (PCB, Aikido driver) 6C33C-B x 2, 6N5P x4, DIY KIT! Matched power tubes! Matched power tubes! This is a custom project capable of output 2 x 6,5 Watt on 4 Ohm speaker, or more on a 6 Ohm, 8 Ohm and 2 x 10 Watt on 16 Ohm speaker. Type: Single-Ended Triode, OTL headphone amplifier/preamplifier Tube Compliment: Two each 6AS7 power tubes, 6922 drive tubes and EZ80 for rectification Frequency Response: 8 Hz to 100 kHz (-3dB) Signal/Noise: 95 dB Headphones Impedance: 30 to 600 Ohms Input Impedance: 100 kOhms Preamplifier Gain: 10 dB THD: <= 0.08% A ROYAL TREAT FOR YOUR EARS. AudioValve RKV Mark II , The Earphone Amplifier. Patented circuitry, full vacuum tube OTL differential amplifier, 6.3mm stereo earphone inlet 2, vacuum tube PCL805 4, output power per channel 3W, bandwidth 15~100KHz, damping factor 3600, distortion 0.002%, maximum output voltage 80V, size 360 200 120mm, weight 10kg. I would imagine it would be a lot cheaper in mild steel , aluminium is a bear to laser cut and weld. I have lasers at my factory - unfortunately not high enough power and of the wavelength to cut steel or ally - we do plastics like acrylics, perspex , corian , formicas and other organic stuff like wood.
This is a transformer-free push-pull headphone amplifier operating on the OTL circuit in Class A. The device has a dynamic and musical sound what makes it one of the best tube headphone amp under 200. Inside the device, a gain switch is implemented.
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The Crack Speedball sounds better to my ear, faster. But, this is from memory. In any case, I am aware of only glowing reviews for this OTL amp. CONUSA sales only. I have a lot of only + feedback under this name at the usual places. This was buily by an experienced DIY-er, and was checked out by another, from whom I bought it. 2014 newmar dutch star for sale.
DIY OTL Tube Headphone Amp Kit (PCB, Case, Extras) WCF 6SN7, 6BX7. C $256.00 + shipping . Headphone Tube Lamp Amplifier OTL. C $332.81. Free shipping . 88 results for headphone amp diy kit ... DIY OTL Tube Headphone Amp Kit (PCB, Case, Extras) Aikido WCF 6SN7, 6BX7. C $271.71; Buy It Now; Calculate Shipping ; 92 ...