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The first and only DIY Microphone kits!

 Do-it-Yourself

Microphone Kits

A5500 & A5500MP 

DIY vacuum tube microphone kits

a460 DIY FET microphone kit
A5500 - $156.95 free shipping* Single-Pattern - 

NOW IN STOCK

A5500MP - $189.95 free shipping* Multi-Pattern

SOLD OUT NO ETA YET

 

NOW IN STOCK

$81.95 free shipping*

Professional studio vacuum tube microphone do-it-yourself kit!

This kit includes everything you need to build a professional large diaphragm vacuum tube condenser microphone.

Use the included components for an excellent sounding tube microphone. Or for those more adventurous DIYers, swap out components and create your own custom high-end tube microphone.

There is already a large following for these kits and many builders have created their own modifications to mimic classic vacuum tube microphones that can cost 10x's the price.

 

 

Professional studio FET microphone do-it-yourself kit! 

Brought to you by popular demand! The first ever DIY Large Diaphragm FET studio condenser microphone kit.

Use the included components for an excellent sounding FET studio condenser microphone. Or for those more adventurous DIYers, swap out components and create your own custom mic.

This kit includes a widely used 1 inch large diaphragm capsule and the industry standard SK170 FET. As bonus features this kit also includes a 100Hz roll-off swtich and circuit and a -6dB Pad switch and circuit. Once complete this will be a highly versatile studio microphone for many recording applications.

 

Kit Includes

Beautifully machined (unpainted) brass microphone body and head-grill assembly
Internal mounting cage assembly to mount circuit board, capsule, transformer and connector housings.

Components included

1 - 32mm/1in large diaphragm pressure gradient capsule (assembled) A550MP comes with 1 - 32mm/1in large dual-diaphragm multi-polar pattern capsule (assembled)
1 - Plastic capsule mount
1 - Pre-amp circuit PCB
1 - Tube socket PCB
1 - Vacuum tube, 12AX7
1 - 9-pin tube socket
1 - 7-pin XLR male connector
2 - Ceramic insulators for both ends of C4

1 - Film Resistor,  1/2 W 10KΩ
1 - Film Resistor,  2W 100KΩ
2 - Film Resistor,  1/2 W 270KΩ
2 - Resistor, 22M or 51M
1 - Resistor, 200M
1 - Film Resistor, RJ 1/2 W 3KΩ
1 - Resistor, 1 KM
2 - Capacitor,  1μ/400V
1 - Capacitor,  1μ/250V,NP
2 - Capacitor,  .022μ/630V
1 - Capacitor,  1000 pF/630V
1 - Capacitor,  100μ/25V
3 - Capacitor,  0.1μ/63V
1 - Capacitor,  1000μ/10V
1 - Ceramic Capacitor, 2-4pF
1 - Transformer, turns ratio 10:1

1 - Fully assembled power supply (A5500MP comes with 9-step selectable PSU)
1 - Power cable for power supply
1 - 7-pin microphone cable


Printed documents
Schematic
circuit board layouts

Kit Includes

Beautifully machined (unpainted) brass microphone body and head-grill assembly
Internal mounting cage assembly to mount circuit board, capsule, transformer and connector housings.

Components included

1 - 32mm/1in large diaphragm pressure gradient capsule (assembled)
1 - Plastic capsule mount
2 - circuit PCBs
1 - 3-pin XLR male connector

R1 Resistor 1/4W 6.8K 
R2 Resistor 1/4W 560 
R3 Resistor 1/4W 1M 
R4 Resistor 1KM 
R5 Resistor 1KM 
R6 Resistor 1/4W 2K-3.9k 
R7 Resistor 1/4W 1.8K 
R8 Resistor 1/4W 20K 
R9 Resistor 1/4W 180K 
R10 Resistor 1/4W 7.5K 
R11 Resistor 1/4W 2.2K 
R12 Resistor 1/4W 2.2K 
R13 Resistor 1/4W 47 
R14 Resistor 1/4W 47 
R15 Resistor 1/4W 150K 
R16 Resistor 1/4W 150K 
R17 Resistor 1/4W 330K 
R18 Resistor 1/4W 4.7K 
C1 Capacitor CBB 0.01μ
C2 Capacitor NPO 1000P
C3 Capacitor NPO 220P
C4 Capacitor CA42 22μF/16V
C5 Capacitor 0.47μ
C6 Capacitor CBB 0.047μ
C7 Capacitor CBB 6800P
C8 Capacitor CA42 4.7μF/35V
C9
C10 Capacitor 330P
C11 Capacitor 330P
C12 Capacitor CA42 6.8Vμ/40V
C13 Capacitor CA42 2.2Vμ/50V
C14 Capacitor CA42 2.2Vμ/50V
CF Capacitor CC1-150p
D1 FET 2SK170
D2 Transistor 1015
L1 Inductor 47μH
L2 Inductor 47μH

Transformer, turns ratio 10:1

Printed documents
Schematic
circuit board layouts

Approximate Specifications after assembly:

Type: large dual diaphragm pressure gradient condenser
Frequency response: 20Hz to 20 kHz
Polar Pattern: cardioid
Sensitivity: 14mV/Pa (@1kHz, 74dB SPL)
Output impedance: <200 ohms
Equivalent noise level: <17dB-A Max. SPL (@0,5%): 130dB

Approximate Specifications after assembly:

Type: Large Diaphragm Pressure Gradient True Condenser 
Frequency Response: 20 Hz to 20 kHz 
Polar Pattern: Cardioid
Sensitivity: 16mV/Pa -40?dB (0 dB=1V/Pa 1000Hz) 
Output Impedance: <200 ohm 
Equivalent Noise Level: <20dB, 
A weighted Max SPL: <0.5% at 135 dB SPL 
Special Feature: -6dB PAD and 100Hz Roll-off
Power Requirement: +48v Phantom Power 

 

   

A5500 (Single Pattern version)

$156.95

NOW IN STOCK

Free Shipping*

*Additional shipping charges apply outside US.

 

$81.95

NOW IN STOCK

 

Free Shipping*

*Additional shipping charges apply outside US.

 

A5500MP (Multi-Pattern version)

$189.95

SOLD OUT NO ETA YET!

Free Shipping*

*Additional shipping charges apply outside US.

 

 
Additional images

Additional images

A5500MP includes upgraded power-supply with 9-step polar pattern switch.

 

 

These kits are intended for intermediate to advance users. 

You should understand intermediate electronics and assembly techniques.

Not included with this kit are step-by-step instructions on how to assemble. You are expected to understand and read schematics and a circuit layout, solder, use a multi-meter etc.

However, the circuit is rather simple and clearly marked.

 

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