The U17 is known for its unique hybrid circuit design that combines vintage and early solid-state technologies:
While the original hardware had very few controls, the digital version adds modern versatility: NEOLD U17 [WiN-OSX]
Uses ECC81 double triodes for both the audio amplifier and sidechain driver. The U17 is known for its unique hybrid
The original hardware was custom-built by in Hamburg for the post-war NWDR (Northwest German Broadcasting) network. Only a few dozen units were ever produced, primarily used to boost signal-to-noise ratios in AM radio transmissions. It is famously documented in the "Braunbuch" , an anthology of technical descriptions for German broadcasting hardware. Technical Architecture NEOLD U17 [WiN-OSX]