Let's discuss the Steel String Singer #002 build here. Have you built one? Do you have any insight to share about the real Steel String Singer #002?

Here is some main information about the project.

GitHub repository for layout, directions, etc. https://github.com/colganr/steel-string-singer-sn-002

Google Photos album of all the pictures and videos I took while researching and building the amplifiers. https://photos.app.goo.gl/W8zAvFVRCSsRoQgs7

steel-string-singer-sn-002

This project is intended for hobbyists. Amp builders for profit may use the information here, but I'd encourage a donation for my efforts. If you find this information useful, please consider donating directly to me here: https://www.paypal.me/thetonegeek

This project is to create a tube amplifier chassis that can be compared to a Dumble Steel String Singer s/n #002. I'm sharing these drawings free of charge with hopes to inspire someone to pursue a custom chassis for their tube amplifier goal. These drawings can be used as an educational reference but are also complete enough to fabricate as-is.

3D-CAD-Design*.stp and *.ipt files generated by AutoDesk InventorAutoCAD-DesignLayout and precision design using AutoCAD. *.dwg and *.dxf filesBOMExcel lists of my purchases. Mouser project file as well that can import into Mouser's BOM Manager for easy purchase.Reference-Pictures*.png screenshots of various portions of the chassis in InventorCircuitSchematics and layouts that are SSS #002 based. Includes *.DIY DIYLC files as well as individual PDF/PNG of the boardsSilkscreen-Artwork*.pdf and *.svg of the front and back artwork

Notes about Fabrication

When finding a sheet metal fabricator for a quote, they will likely want to know:

Overall dimensions, the type of metal, the thickness of the metal, radius bend parameters, Welding assembly, and considerationsQuantityFinishing

I use CAMMetals in Connecticut and recommend their work. I can't guarantee they will take you on as a customer but it doesn't hurt to get a quote. http://www.cammmetals.com/

For this project

23.75" x 2.5" x 8.05"5052 Aluminum.125" Thick.125" Radius bendsWelding considerations is in the "Reference-Pictures" section of this project. The "sides" will be a second part to tack welded in place. No full weld beads required as the tack welding is enough.Price breaks usually are given after quantity of 2x. Anything in the 10x range will give you the best price breaks.SSS #002 has a brushed finish that can be directly silk screened. Some folks may prefer having the chassis powder coated silver but it is not required unless it's your personal preference. For powder coat color, I like Prismatic Powder's polyester "Tin Can" for that matte silver look that's not overly metallic in appearance. https://www.prismaticpowders.com/shop/powder-coating-colors/PMB-8126/tin-can

Send along the *.ipt and the *.stp files to the fabricator as well as the Reference-Pictures. Some fabricators also do powder coating and silk screening of the artwork.

Notes about Silk Screening

You will need the following fonts if you want to modify the *.svg artwork. I cannot upload these fonts because some of them are copyright protected but a quick Google search will likely provide you what you need.

• BD Geminis

• sans-serif

• Conthrax

• Cooper Black

• Xolonium

• Goudy Text MT
  

If your chassis is powder-coated, provide the silk screener the Manage Material Safety Data Sheets (MSDS/SDS) so the silk screener knows which ink to use. The safety sheet will identify the contents of the powder coat so the ink will adhere properly to it. If you use "Tin Can" powder coat, it's polyester-based.

There is usually a setup fee and with this fee, the silk screener might adjust the artwork so they can align the holes the way they prefer so the artwork is laid down straight.

I use Korzon Screen Printing in Connecticut https://www.korzonscreenprinting.com/ I cannot guarantee they will take you on as a customer but it doesn't hurt to get a quote.

Notes about Circuit Boards & BOM

I have made a layout that matches the chassis for this project. I used DIY Layout Creator Freeware http://diy-fever.com/software/diylc/ because the .diy files can be uploaded to Hoffman Amplifiers. Hoffman Amplifiers made it even easier to order by adding this project to their board set https://hoffmanamps.com/MyStore/catalog/MiscEyeletBoard.htm

Notes about the Head Cabinet/Shell

I recommend Taylor @ Amplified Nation http://amplifiednation.com/ to get a quote for making the cabinet for this chassis. I've already talked with him and he's excited to meet your goals.

Additional Information

Always double check mine, and your work. I am not responsible for any losses as I'm providing this information for free and educational purposes. I am confident these drawings and files will produce an excellent chassis as-is and I have a bit of experience now with designing and outsourcing my own chassis. Enjoy and good look! Drop me a message if you have any questions or you want to let me know how your chassis went! https://www.thetonegeek.com/

I also am creating a YouTube series for my build for reference TheToneGeek YouTube SSS #002 Playlist