This unit has been professionally modified, replacing the notoriously fragile and rare Reticon SAD1024 chip with a modern, highly reliable Panasonic MN3007 bucket-brigade delay (BBD) chip.This mod breathes new life into a classic circuit. It preserves the legendary thick, chewy analog character of the original Ross pedal while significantly improving the signal-to-noise ratio, headroom, and overall reliability for modern gigging and studio use.The MN3007 Upgrade & Features

• Upgraded MN3007 BBD Circuit: Replaces the failure-prone SAD1024 chip. The MN3007 provides a cleaner, quieter bucket-brigade sweep with pristine analog warmth and much lower background hiss.
• Classic Tone Intact: Powered by the vintage RC4558 op-amp architecture, keeping the authentic harmonic richness alive.
• Iconic Modulation: Easily dials in everything from lush, swirling chorus textures to massive, dramatic "jet-plane" whooshing sweeps and deep dive-bombs.
• Built Like a Tank: Housed in the classic, heavy-duty rugged enclosure built to handle heavy use.

Versatile 4-Knob Control Layout

• Manual: Adjusts the base notch frequency for precise harmonic tuning.
• Man/Auto: Sets the sweep width and overall depth.
• Rate: Controls the modulation speed, spanning from ultra-slow evolution to rapid helicopter chops.
• Recycle: Regulates the regeneration/feedback intensity for deep, resonant flanging.

Vintage 70s Ross Flanger R-60 Guitar Effect Pedal.  Modded with a quieter and more reliable MN3007 BBD IC.  Item works perfectly.  General wear from vintage age.  Shipping is calculated from 16105.  Thanks for looking and Good Luck!
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