I know a lot of hobbyists here have bought my boards off Ebay in the past. They're still mentioned in many threads here. I had to take a year or so off and pulled the adds. Anyway, they're back up. Just look up the user HVFORLESS and you'll see what I have for sale.
So far I have the following listed:
LV board - allows you to get 6.3VDC from a 6.3VAC transformer winding. Also has a voltage doubler circuit that can be activated with a jumper and trimpot.
HV board - great universal board for any HV tube project. Every conceivable option is accommodated including negative bias.
Pre-Amp board - in my opinion the best preamp power supply board out there. Tons of options and can handle tons of current.
I also plan to list my OTL Tube Headphone Amp White Cathod Follower board. This board combines the pre-amp circuit above with a white cathode follower headphone amp circuit. Best sounding headphone amp I've ever heard. This listing will come with additional info to help with chassis construction.
So far I have the following listed:
LV board - allows you to get 6.3VDC from a 6.3VAC transformer winding. Also has a voltage doubler circuit that can be activated with a jumper and trimpot.
HV board - great universal board for any HV tube project. Every conceivable option is accommodated including negative bias.
Pre-Amp board - in my opinion the best preamp power supply board out there. Tons of options and can handle tons of current.
I also plan to list my OTL Tube Headphone Amp White Cathod Follower board. This board combines the pre-amp circuit above with a white cathode follower headphone amp circuit. Best sounding headphone amp I've ever heard. This listing will come with additional info to help with chassis construction.
As mentioned above, search for user HVFORLESS. You can also search by the board description.
DIY PCB Board - Tube Amp - LV Tube Heater DC Power Supply - 6.3VDC from 6.3VA
DIY PCB Board Tube PreAmp or SET PS Power Supply HV LV 50-400VDC 300B 6SN7 12AU7
DIY PCB Board Tube Amp Universal PS Power Supply HV with Neg Bias KT88 EL34 EL84
DIY PCB Board OTL Tube Headphone Amp Aikido White Cathode Follower 6SN7 6BX7
DIY PCB Board - Tube Amp - LV Tube Heater DC Power Supply - 6.3VDC from 6.3VA
DIY PCB Board Tube PreAmp or SET PS Power Supply HV LV 50-400VDC 300B 6SN7 12AU7
DIY PCB Board Tube Amp Universal PS Power Supply HV with Neg Bias KT88 EL34 EL84
DIY PCB Board OTL Tube Headphone Amp Aikido White Cathode Follower 6SN7 6BX7
I have an update to provide on the boards I have for sale. I'm visiting the Mouser BOMs weekly and updating them with substitutes for out-of-stock components. I was surprised by how often parts disappear from the shelves these days. I'm stocking the hard to find Microchip LDO ICs that are vital to the unique low-voltage circuit I employ. I did a large buy from an overseas distributor to fill the gaps for anyone in need.
The board you see below is the preamp PCB. This board is packed with features you won't find anywhere else. What's really unique is the low voltage circuit. I also have a standalone low-voltage board with just that portion of the circuitry. That's probably the most popular board I offer.
The board below is the white cathode follower headphone amp for the serious audiophile. It uses the circuit from the preamp board above. It's a true all-in-one board that sounds amazing. Not even a hint of noise.
The board you see below is the preamp PCB. This board is packed with features you won't find anywhere else. What's really unique is the low voltage circuit. I also have a standalone low-voltage board with just that portion of the circuitry. That's probably the most popular board I offer.
The board below is the white cathode follower headphone amp for the serious audiophile. It uses the circuit from the preamp board above. It's a true all-in-one board that sounds amazing. Not even a hint of noise.
