There must be a previous post. This one may concentrate in measuring the inductance at both 1.28KHz and 96Hz. Measurments by Escort ELC - 120 LCR digital meter.
Philips cassete recorder head, blue type New Old Stock
120mH at 1.28KHz
170mH at 96Hz
250Ω at 1.28KHz
(Looks like a microphone voice coil?, stepping up by a microphone transformer?)
Photovox? new old stock head for FBT PA echo
950mH at HF
1.11H at LF
1.22KΩ
SONY head in car cassete adaptor CPA-11
53mH
650mH at LF
2.6KΩ
Heads of 4 track Tascam Porta 03 cassete recorder
133mH at HF
190mH at LF
250Ω AC impedance
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