This is a pair of blank PCBs to build two power opamp drivers. 

These can be used for a number of applications.  I built them for a tube audio amp to drive a tube into class-A2 operation.  They could also be used as audio line drivers, headphone amplifiers, or power actuator drivers. 

Basically it's just a power opamp with supporting passive circuitry on a PCB.  It supports 7-pin TO-220 power opamps, like the OPA452, OPA453, OPA547, and OPA548 from TI.  It can be configured as an inverting or non-inverting amplifier, and has provisions to add external compensation capacitors.

With the OPA452, you can drive 50mA from +/-40V supplies - with the OPA548, up to 3A from a +/-30V supply!

For full details on the design and other information refer to my web site.  eBay will not allow me to post the link here any longer, so you will need to do a web search.

This auction is for is a pair (2) of PCBs only, no parts or anything else is included.   Photo of assembled board is for reference only!  

Flat rate shipping via FedEx to US destinations is shown.  

LIABILITY DISCLAIMER

A person who constructs or works on electronic equipment may be exposed to hazards, including physical injury, the risk of electric shock or electrocution, and exposure to hazardous substances such as lead, mercury, and other inorganic or organic compounds.  These hazards can result in health problems, injury, or death.  Only qualified persons who understand and are willing to bear these risks themselves should attempt the construction of electronic equipment.  By purchasing this item, the buyer acknowledges these risks.

Vacuum tubes operate at high temperatures, may contain toxic substances, and may have exposed parts that carry hazardous voltages.  There is a risk of electric shock, electrocution, burns, or fires that is inherent in the construction and use of vacuum tube equipment.  By purchasing this item, the buyer acknowledges these risks.

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