Pete Millett's DIY Audio pages Pete Millett's DIY Audio pages For technical books, tube data, vintage data, transformer data, and McIntosh data, go to: Last update: 10/28/28 - Added the, a 50-watt hybrid class D power amp using the Korg Nutube 9/9/18 - Added details on a and a 9/8/18 - Added a Mini Electronic Choke 9/7/18 - Added the PLEASE READ - Commercial usage of information on this site: I consider all the information that I post here to be in the public domain. So, you can use it however you want, for commercial or non-commercial use. That said, I would appreciate it if you at least let me know if you are going to use any of the circuits or especially PCB Gerber files to make commercial products, or to sell bare PCB's. There are some cases where products are being sold not only with my permission, but active involvement. The 'Millett Hybrid' effort and others at are examples (and excellent models of how the DIY community should work, in my opinion). There are other cases where I have asked vendors to sell PCB's as a service to hobbyists.
Do It Yourself Vacuum Forming For The Hobbyist Pdf File. 5/20/2017 0 Comments. Well obviously there is no “free energy” anywhere. I recently needed 12 fake candlestick phones for a musical ('Crazy For You'). The vacuum forming process requires the length and width of your plastic sheet to be considerably larger than the size of your finished part because the perimeter of the plastic sheet is held between two metal clamping frames. The footprint of your part(s) needs to fit within the boundaries of the perforated metal top of the hobby vacuum former.
And there are other cases where companies are manufacturing and selling PCB's, chassis, etc. Without contacting me at all. In ALL of these cases, I make no profit from any of the sales.
Zero, zip, nada. I have a normal 'day job' that pays the bills, this is strictly a hobby with me. So please do not expect me to provide the level of technical support that you might expect when buying a product.
I try and help, but it sometimes takes me days - even weeks if I'm traveling for work - to respond. Thanks for your indulgence in reading this! All that said. I do sell things, including projects I no longer need, PC boards for my designs, and occasionally parts and tubes.
I do this through eBay - I maintain an eBay store 'pmillett'. You can at the moment. This is a depository for various audio designs and projects - mostly tube - that I've put in the public domain, as well as additional info to support magazine articles that I've written, and an ever-growing amount of technical data archives relating to vintage and tube audio.
I'm constantly adding and updating things, so come back every once in a while and see what's new. Remember: you may have to hit the 'refresh ' button to see the updated versions of pages! Follow the links below for detailed info. Most pictures are hyper-linked to full-size pictures, so you can zoom in if you click on them.
If you have questions please feel free to e-mail me at: Please, if you send me e-mail, make sure that there is a logical 'subject', or your mail will get dumped along with all the junk mail (spam) that I get - it's up to about 100 junk e-mails per day now. If I don't respond within a few days, try again, just in case I missed your message. I try and return everybody's mail within a week, though I travel quite a lot for work and find I get very behind at times.
Please be patient. Standard disclaimer: This info is provided with no guarantees as to accuracy, usefulness, etc.
There's no guarantee that if you try and build anything like this stuff that you won't electrocute yourself, the kids, or your cat, or burn your house down. Especially if you don't know what you're doing.
Many files on this site, especially scanned documentation, are in Adobe Acrobat (PDF) format. I recommend that if you don't already have it you download the latest version of Adobe reader. Some files have compressed images that may not work correctly with older versions of Acrobat reader. Scanned vintage books, manuals, catalogs, papers. Please go to for this material. Audio projects and experiments: Power amps NEW 9/7/18 - A UPDATED 6/15/18 - A A ' stereo R120 SE amp ', a low-distortion zero-feedback push-pull 300B amp A for push-pull amps 'Mr.