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STFU13N65M2 650V logic-level Mosfet
One STFU13N65M2 650V logic-level Mosfet. Suited for high speed switching of rectified mains or other high voltage supplies.
One or two are required for the Hifi Stereo Valve Preamplifier.
Specifications:
Maximum drain-source voltage: 650V
Maximum continuous drain current: 10A
Maximum pulsed drain current: 40A
Maximum on-resistance: 0.43Ω
Gate charge: 17nC
Input capacitance: 590pF
Turn-on delay time: 11ns
Rise time: 7.8ns
Turn-off delay time: 38ns
Fall time: 12ns
This replaces the IPA60R520E6 previously used as it has similar or superior specifications.
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Red & White PCB-mounting RCA sockets
Traditionally, the stereo input sockets for an audio device are white (left) & red (right). But sourcing white sockets is hard, so we're offering this set.
These sockets can be used with projects such as the CLASSiC DAC. While they aren't an exact fit for the footprint on that PCB, they will fit with a small amount of coaxing.
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Dual gang 50kΩ 16mm logarithmic taper potentiometer with spline tooth shaft
This potentiometer can be used in the Stereo Valve Preamplifier. This value is hard to get in this style of pot but it suits driving devices with a relatively high load impedance.
Note that because it has a spline shaft, not all types of knob will necessarily fit. The types with a grub screw generally work OK, or those designed for spline shafts. Also the shaft is quite short, which means you won't have to cut it down but it will not protrude a long way through a thick panel either.
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Stereo Valve Preamplifier PCB [01101161]
PCB for the High-Performance Stereo Valve Amplifier.
Double-sided PCB with plated through holes, solder mask and silkscreen overlay.
170 x 102mm.
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Stereo Valve Preamplifier PCB pattern (PDF download) [01101161]
PDF with the PCB design for the High-performance Stereo Valve Preamplifier (double-sided).
Both layers are in a single PDF. Note that due to the slots required to mount the valve sockets, this would be difficult to etch yourself. It is provided mainly for reference purposes.
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Laser cutting artwork and drilling diagram for the Hifi Stereo Valve Preamplifier (PDF download)
This download includes the laser cutting diagrams in various file formats for both the regular and musical instrument versions of the Hifi Stereo Valve Preamplifier.
Note that this file has been updated to fix the position ot the power switch hole.
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Hifi Stereo Valve Preamplifier clear acrylic case pieces
3mm thick clear acrylic case pieces for the Hifi Stereo Valve Preamplifier design. Six pieces are provided, all accurately laser cut.
Use acrylic glue and self-tapping screws to complete the case as per the articles.
325 x 310mm total size.
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Hard-to-get parts for Stereo Valve Preamplifier
Some of the harder-to-get parts for the High-Performance Stereo Valve Amplifier. See the parts list link below for details on what is included.
The red & white RCA sockets and high-voltage Mosfets are also available separately from our shop; see below for details.
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