This is a blank (unassembled) PC board to build a high voltage linear voltage
regulator. It is a floating "Maida" type regulator, using an LM317 and a high
voltage N-channel power MOSFET. This is typically used for tube audio
circuits, to create a regulated B+ or screen voltage supply from a higher B+
For full details on the design, including the schematic 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 single PCB only, no parts or anything else is
included. The heatsink shown is also not included - it is available separately
from my eBay store, or from Landfall Systems. Photo of completed unit is for
Will ship anywhere. Flat rate shipping is shown. Payment by PayPal only.
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
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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CONSEQUENTIAL DAMAGES OF ANY NATURE including, but not limited to, property
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for any claim shall not exceed the purchase price paid by Buyer for the goods,
irrespective of the nature of the claim, whether in warrant, contract or
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SELLER HARMLESS FROM ANY CLAIMS BROUGHT BY ANY PARTY REGARDING ITEMS SUPPLIED
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