Externet
Well-Known Member
Hi.
Planning to build a telecoil to drive an amplifier for earphone, voice range only... Should I use plain iron or ferrite ? Would a plain nail perform ? Is there a convenient geometry of the core/coil for better sensitivity ?
Would a high turn count reed relay bobbin be satisfactory over the core ? I have a couple waiting to be used in something... Low turn count ferrite coils are abundant canibalized from defunct SMPSs.
----> https://www.tecear.com/images/T-coil.jpg
Planning to build a telecoil to drive an amplifier for earphone, voice range only... Should I use plain iron or ferrite ? Would a plain nail perform ? Is there a convenient geometry of the core/coil for better sensitivity ?
Would a high turn count reed relay bobbin be satisfactory over the core ? I have a couple waiting to be used in something... Low turn count ferrite coils are abundant canibalized from defunct SMPSs.
----> https://www.tecear.com/images/T-coil.jpg
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