The 503HTA has been replaced and improved with the
​ 502HTA - Hybrid Tube Amp

​503HTA - Hybrid Tube Amp

The 503HTA, designed and manufactured by Pi2Media (a division of PI 2 Design), is a High Quality I/O Shield designed to bring “Sweet Tube Sound” to the Raspberry PI ® family of Single Board Computers. This HAT allows the Raspberry Pi ® SBC to drive Headphones from 32 - 300 ohm with ease and fidelity.

The On-Board PCM5102A, 24-Bit @ 192Khz DAC drives the single stage 6DJ8 (aka 6922) tube. The Class-A Output Buffer consists of the Audiophile grade IRL510 MOSFET and LM317A Constant Current Source. A dedicated 6.3V Heater supply insures lowest crosstalk.

In addition, the 503HTA can be operated as a Stand Alone Headphone Amp via the 3.5mm Line In jack.
  • Features
  • Test Results
  • Datasheet
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  • 24-Bit DAC – The well regarded -112db THD PCM5102 is used to convert the I2S Stream to drive the Single Triode Tube Stage at 24-Bit up to 192Khz Frame Rate
  • TUBE ROLLING – The 503HTA supports both 6DJ8 (default is JJ 6DJ8) and 12AU7 type tubes. Individual Anode Bias Adjustment Pots plus selectable Series/Parallel Heater Configuration insure the perfect setup for virtually any tube!
  • HEADPHONE OUT – Rugged 3.5mm Jack plus selectable output resistance between 1.5, 32 and 100 ohms.
  • VOLUME POT AND GAIN SELECT – High Quality ALPS Potentiometer and dual Gain settings allow the user to select the output voltage to the optimal level for each Headphone.
  • SINGLE POWER INPUT – A Single 24V @ 2A input powers the 503HTA as well as the attached PI, providing 5V @ 3A.
  • STAND ALONE OPERATION – The 503HTA can also be operated in stand alone mode using the 3.5mm Line In Jack.

Downloads

visio-503hta_datasheet_p5.pdf
File Size: 917 kb
File Type: pdf
Download File
503hta_hw_ref_manual_p5.pdf
File Size: 408 kb
File Type: pdf
Download File