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The Tanstaafl System – Home Brew Audio Preamp Tape Turntable Tuner Preamplifier

By |July 23rd, 2026|

You are bidding on The Tanstaafl System - this is a vintage homemade unit that appears to be a preamp / selector for tape, turntable, and tuner inputs/outputs. Used vintage homemade audio preamplifier unit, the power cord looks questionable and we don't have an audio setup so we cannot test. XS 11150 BRN Terms and Conditions: ShippingBuyer pays Shipping, Handling, and Packaging.We do not ship to PO boxes, APO/FPO.For international shipping please contact us for a quote.We combine shipments, please contact us after your purchase and before payment is made. PaymentWe accept: PayPal & Credit Cards (Amex, Discover, Mastercard, & Visa). We also accept all other standard forms of payment that eBay has deemed not real.We do not ship until money has cleared our bank.International orders must PayPal, by bank, T/T, or credit card.All California residents must add 9.25% sales tax, or provide a signed CA resale certificate. Auctions and Buy it Now Listings Policy Winning bidders must contact within 3 business days after auction close. Payment must be received within 4 days after order is confirmed. Non paying bidder will be filed after 4 days of no contact. We reserve the right to cancel bids of any users with negative feedback or bid retractions. We do our best to accurately describe the item for sale, however we are not responsible for typographical errors. Some of our items advertised may be used and have scratches etc. from normal wear. Any additional imperfections will be listed in the description. Orders will be shipped within 2 business days upon confirmation of payment. All auction sales are final. No refunds are available, we can only issue an exchange for the following reasons: Incorrect Quantity; Incorrect Item Shipped; Freight Damage Shipping Fees and Return Fees are non-refundable. Items not picked up within 30 days will be assessed storage fees. Items not picked up within 3 months will be disposed of at the auction winner’s expense.

Vintage Home Brew Homemade HAM Radio Tube Type Transmitter, working.

By |July 23rd, 2026|

"I don't know anything about ham gear.". = It does not work. Do not buy without watching the video. The reason I do a video is for you to see a sample of it. Although listed for parts it does work. "I am unable to test the item.".

Vintage Homemade Electronic Device Home Brew Bridge Rectifier? For Parts

By |July 23rd, 2026|

Piece on the back (capacitor?). labelled Christie Electric. This is being sold as-is, untested, for parts only.

Fully Assembled Gigatron TTL 8 Bit Homebrew Computer w/ MS Basic WozMon Apple 1

By |July 23rd, 2026|

This is a complete, working system ready to power on and explore—no soldering, no assembly, no sourcing required. • Fully assembled Gigatron motherboard. • Fully assembled Gigatron daughterboard. • Fully assembled.

HIFI ultrasonic directive(parametric) speaker kit(assembled)10mmx48pcs F/J

By |July 23rd, 2026|

HIFI ultrasonic directive(parametric) speaker kit(assembled)10mmx48pcs F/JDescriptionAbout This ItemsThis is a speaker that uses ultrasonic waves that allows you to enjoy extremely sharp directivity.The sound quality is about that of a pocket radio, but it's pretty good for a parametric speaker.I use 48 40kHz transducers.Because they use a special driver circuit, they have higher output than conventional parametric speakers.It can reach about 10m to 20m in a quiet room.We recommend a power supply of about 19V, which can be used for a long time. It can be used up to 24V, but the radiator gets hot.Please replace it with a larger type. It will be shipped fully assembled with simple adjustments. What's included in the finished kitImage of ultrasonic speaker unit and driver boardwhat you need15V to 24V, about 2A DC power supply DC plug is standard 5.5mm, center pin is positiveYou can use a DC adapter for your laptop.The 3.5mm audio jack is the input, and you can use a sound source that can play speakers, or the speaker output of a PC or laptop.The output of smartphones such as iPhones is weak and cannot be used.ShippingWe always send the item with a tracking number. So please place an order without any concern on delivery. You can always track the delivery status.Shipping is only available to the address registered in eBay. If you want us to send another address, please change your address on eBay and then place an order.Shipping is available from Monday to Friday. Weekends are not available because freight (shipping) companies are closed.We do not mark merchandise values below value or mark items as “gifts” – Japan, US and International government regulations prohibit such behavior.Ships within 1-10 business daysIt will arrive in 3-14 days after shipmentAbout Importer's ObligationImport duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. Thank you for your understanding. ★Check out my shop too https://www.ebay.com/str/kohsshopjapan

Gigatron TTL 8 Bit Homebrew Computer DIY Kit Complete All ICs & Sockets Included

By |July 23rd, 2026|

• Gigatron motherboard PCB. • Gigatron daughterboard PCB. All ICs are included. All components are provided. No sourcing required. • All required ICs. • Intended for DIY assembly. This is a complete, no-compromises kit for building a real TTL-based 8-bit computer using discrete logic, not emulation.

Vintage Mysterious Home Brew Vacuum Tube Radio Scanner in a Shiny Metal Case

By |July 23rd, 2026|

Really can't make heads or tails of this.

🔥 Vtg 1985 Audio Video Sync Starter Home Brew & 12 V To 100 Volt Relay

By |July 23rd, 2026|

The product is a vintage 1985 Audio Video Sync Starter Home Brew & 12 V to 100 Volt Relay. This item is likely a unique and rare piece of vintage electronics equipment that was used for audio and video synchronization purposes. With the ability to convert 12V to 100V, it offers versatility and convenience for various audio and video projects. The inclusion of a relay indicates that this device may have been used for controlling the synchronization of audio and video signals in a homebrew setting.

Vintage Home Brew HomeMade HAM Radio Power Supply 14 Volt 20 Amp AS IS

By |July 23rd, 2026|

Estate find! Fuse is blown. Not working. No further testing.

Vintage Home Brew HomeMade HAM Radio Tube Type Transmitter UTC LS-88 TRANSFORMER

By |July 23rd, 2026|