This is PAIR of blank PCBs to build two push-pull monoblock tube power amplifiers, using a variety of output tubes like the EL34, 6L6, and KT88. For full details on the amplifier design, including pictures, measurements, schematics, bill of materials, mechanical drawings, etc. 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.
The PCB has the driver circuit (using two 6SN7 differential amp stages) and the power supply section on it - the output tubes are mounted off-board. It uses a Sowter or Lundahl input transformer to do the phase splitting, so the input can be balanced or unbalanced. Output as designed is about 25 watts per channel into 8 ohms. Modifications to the circuit can be made that result in higher power.
Note that this project does involve contruction of high-voltage circuitry, so do not undertake this unless you are qualified and comfortable building circuits that use dangerous voltages!
This auction is for is two PCBs only, no parts or anything else is included. Will ship anywhere. Flat rate shipping is shown. Payment by PayPal only.
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.
IN NO EVENT SHALL THE SELLER BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE including, but not limited to, property damage, personal injury, death or legal expenses. Buyer's recovery from Seller 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 otherwise. By purchasing this item, BUYER AGREES TO INDEMNIFY, DEFEND AND HOLD SELLER HARMLESS FROM ANY CLAIMS BROUGHT BY ANY PARTY REGARDING ITEMS SUPPLIED BY SELLER AND INCORPORATED INTO THE BUYER'S PRODUCT.
If you do not agree to this disclaimer, DO NOT BUY THIS ITEM.