Lorem ipsum dolor sit amet, consectetur adipiscing elit. Tones are spot-on, build quality is excellent, leather case is a nice touch. Worth every penny.
SKU: BBX-MK4
Blue Box Mark IV
$149.95
Low stock — only 3 units left
The flagship of our phreaking line. Hand-soldered, brass-fitted enclosure. Multi-frequency tone generator with leather carrying case. Ships in plain brown packaging. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. The Blue Box Mark IV represents the culmination of nearly four decades of underground engineering. Each unit is hand-assembled in our workshop using NOS components sourced from Bell System surplus auctions.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Multi-frequency tone generation covers the full operator console range with crystal-controlled accuracy.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore. Includes leather carrying case, two 9V batteries, frequency reference card, and our 28-page operator's manual printed on archival paper.
| Dimensions | 8.0″ × 5.0″ × 1.5″ |
|---|---|
| Weight | 1.2 lbs (with batteries) |
| Frequency Range | 700 Hz – 1700 Hz, ±0.5 Hz |
| Output Level | -12 dBm into 600Ω |
| Power | 2× 9V batteries (included) |
| Battery Life | ~40 hours typical |
| Enclosure | Brass-fitted aluminum, satin-blue powder coat |
| Compatibility | Standard analog phone lines (loop start) |
| Warranty | 90 days against defects in workmanship |
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Excellent unit, only knocked off a star because the manual could use better diagrams.
Ut enim ad minim veniam, quis nostrud exercitation. Replacement for my old Mark II that finally gave out after 22 years. The Mark IV is a clear upgrade.
Frequently Asked Questions
Lorem ipsum dolor sit amet. The device itself is sold as a hobbyist tone generator. Use on the public switched telephone network may be subject to local regulations — we recommend consulting an attorney before deployment.
Sed do eiusmod tempor incididunt. All orders ship via USPS Priority Mail in plain brown packaging. No company branding appears on the exterior. Tracking is provided via email upon dispatch.
Ut enim ad minim veniam. Yes — cash is preferred, in fact. Mail US currency in a folded sheet of carbon paper to the address on the order confirmation. We also accept money orders.
Duis aute irure dolor in reprehenderit. The Mark IV adds crystal-controlled frequency stability (vs. RC-network tuning), an upgraded brass-fitted enclosure, and replaces the speaker grille with a finer mesh.