Handy Reference Chart:
OEM batteries by series
71XX – Dark blue (C-S2) – 1000mAh
81XX – Gold/yellow (C-M2) – 1400mAh
83XX – Dark blue (C-S2) – 1000mAh
87XX – Dark Blue (C-S2) – 1000mAh
88XX – Green (lime) (C-X2) – 900mAh
Soviet USSR made in CCCP High Impedance Headphones TOH-2M 1600 om Oktava
$29.95
IMPEDANCE CONSIDERATIONS IN CRYSTAL MIXERS & APP. TO UHF TUNER 50'S ESTATE
$9.99
original GTE PATENT #3,098,175 Electroluminescent Cells Controlled Impedance Net
$58.49
Antique Marconi Radio Model 62 Loud Speaker A.C. Impedance 5000
$49.99
NASA ORIG. GLASS SLIDE 3.25 X 4 impedance cardiograph harness S-69-1658 RARE
$150.00
Western Electric 425E Impedance Matching Network Anti-Sidetone Original Box '69
$24.99
High Impedance Piezo Black Crystal Radio Earphone, New Design,Reduced Base Audio
$15.00
TWO -- WWII HEADSET ADAPTERS MC-385-C HIGH TO LOW IMPEDANCE -- SIGNALCORPS MILI
$39.99
MULTI TAP 8 ohm - 100K diy kit impedance matching radio electronic transformer
$29.00
NEW Shure C15A Microphone MIC CABLE 15ft 4.6m High Impedance
$19.53