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MURATA (Japan) Microfork Audio Piezo Resonator for analog tone control

Murata

$4.00
Condition:
Used
Minimum Purchase:
1 unit
Maximum Purchase:
8 units
Shipping:
Calculated at Checkout
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These devices date back the 1970's when remote control of devices and equipment was commonly performed by sending audio frequency tones, usually via a radio communications link.

These devices were used for everything from remote controlled garage doors, pagers, security access systems etc

No digital here, everything is analog based

 

Murata Japan

Tuning Fork Resonators - these are also referred to as "Microforks"

USED PULLS but absolutely working - removed from working equipment

Various frequencies (listed below)

Never seen one of these? They are used to filter or generate audio signals, I have associated devices such as the Murata D1200 and D1055 to make a complete system.

They have three terminals, input, common and output, physically very small - although they appear very similar to crystal filters, these are designed for much lower audio frequencies and use a piezo element

Bandwidth is 2 ~ 5 Hz

They are used as band-pass filter or resonator in high stability audio oscillators

Frequencies available:

2500.0Hz

1700.0Hz

967,5Hz

879.0Hz (2)

877.5Hz

832.5Hz

802.5Hz

 


Very interesting devices to experiment with - I can supply a very detail 22 page applications book (pdf format) - one of the photographs shows a very simple and yet extremely accurate audio oscillator built around these devices.



Tested as described in the description This item is not returnable, UNLESS not as described