Vintage 1978 Electro-Harmonix Doctor Q Envelope FollowerUp for sale is a beautifully clean and completely stock 1978 Electro-Harmonix Doctor Q envelope follower. First introduced in the mid-1970s, this legendary analog filter specializes in snappy, percussive filter sweeps and instant rhythmic groove. If you want authentic, touch-sensitive '70s funk tones in a simple, one-knob package, this is the pedal.

Condition & Functionality:

• Functionality: 100% working and fully operational. The circuit tracks your picking dynamics perfectly. The Range control sweeps smoothly, and the Bass switch triggers a robust low-end boost exactly as it should.
• Originality: This pedal is all-original and unmodified. No added modern DC power jacks or drilled holes—it operates purely via a 9V battery or a vintage-correct 1/8" (3.5mm) power adapter.
• Cosmetics: Very clean condition for its age. The chassis graphics are crisp, and the pedal has avoided the heavy corrosion or velcro residue frequently found on these vintage enclosures. (No box or paperwork included). Features:

• Made in NYC, USA (Late 1970s)
• Range Control: Sets the frequency sweep depth
• Bass Toggle Switch: Selects a full-range guitar voicing or a dedicated bass boost
• Highly dynamic analog envelope tracking

Shipping:

• Prompt, secure shipping with tracking.
• Safely wrapped and double-boxed to ensure the chassis stays protected on its way to your board.

Please review the photos for an exact look at the cosmetic condition. Feel free to reach out with any questions or send over an offer!

You can shop with complete confidence that your item will be described accurately as Vintage Gear America's vast experience has culminated in great expertise allowing for the best purchasing experience. We ship worldwide UPS, USPS and FedEx always implementing new shipping materials and careful professional packing. We would like to thank you in advance for your patronage and cooperation.

John Russell Nelson owner

Vintage Gear America