WM-66DC103 Specifications: Type: Electret Condenser Output Type: Analog Direction: Noise Cancelling Frequency Range: 100Hz ~ 10kHz Sensitivity: -51dB ±4.5dB Impedance: 2.2K Ohm Voltage - Rated: 2V Current WM-65A103 Specifications: Type: Electret Condenser Output Type: Analog Direction: Unidirectional Frequency Range: 100Hz ~ 12kHz Sensitivity: -50dB ±4dB Impedance: 2.2K Ohm Voltage - Rated: 2 ~ 10V Current WM-62BT Specifications: Type: Electret Condenser Output Type: Analog Direction: Omnidirectional Frequency Range: 20Hz ~ 16kHz Sensitivity: -44dB ☓dB Impedance: 2.2K Ohm Voltage - Rated: 2V Current I realise that it is unlikely to get support from the BHG team for understandable reasons.Some Part number from the same manufacture Panasonic - ECG remains to be seen, but I expect to need a pre-amp of some sort. I already use a similar approach to insert my oxalic acid vaporiser and it works great. If not in use, the hole can be plugged with a M10 or similar bolt. 10mm) drilled in the rim of the bottom board. I envision the capsule mounted on a metal rod / pipe that can be inserted through a hole from the back (approx. I have L-shaped hive entrances, so coming from the front will unlikely yield good results. Furthermore (what I find the most attractive), the capsule has a very small size of 6mm at the biggest dimension. Sheets/Panasonic Electronic Components/WM-61A.pdfĪs you can see from the datasheet the frequency response is flat.
The Panasonic WM-60AY that they used is not being manufactured anymore apparently, however I understand the WM-61A is the replacement for it. I'll be attempting to build this over the winter:
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