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9 polar patternsGolden Age Project TC-1

Multi-Pattern Tube Condenser Microphone

The GAP TC-1 is a large diaphragm, multipattern, vacuum tube condenser microphone.

TC-1 SchematicThe mic uses a 6072/12AT7 tube in class-A circuit with what GAP describes as “vintage style” EQ and a transformer-coupled output.

The mic’s capsule is believed to be a 32mm OD, 26mm diaphragm design with 3-micron membranes. It is most likely the standard Chinese-made 32mm K67 capsule found in most inexpensive imported condensers.

Switches on the body enable optional high-pass filter and -10dB pad.

A 9-way rotary control on the external power supply allows selection of Omni, Cardioid, Figure-8, or any of 6 intermediate patterns.

The Golden Age Project TC-1 is also known as: TC1.


Pickup Patterns Pads & Filters
Cardioid (15 mV/Pa; 20 - 20,000)
  • Pad: -10dB (Via Switch)
  • Filter: HPF -3dB/octave @ 100Hz (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 26mm
Diaphragm gauge: 3 microns
200 Ohms (Low) Max SPL: 140 dB
Self-noise: 18.0 dB(A)
Weight Length Max Diameter Interface(s)
500g (17.64oz) 193mm (7.60'') 52mm (2.05'')
  • 3-pin XLR male (1)
Power Specifications
  • Includes tube power supply

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