How do you wire stereo head phones with 8 Ohms impedance for use in a system that needs a head phones with 300 ohms impedance?
So you do not burn out your head phones.
I want to use a light weight stereo head phone with noise canceling in aircraft for VHF radio use and the VHF radio speaker and headset all have 300 ohms impedance.
Thank you for your time.
The easiest way, if you really must have a good (questionable whether it is worth it) match is to use a transformer with a 6:1 turns ratio.
Bill
-- Fermez le Bush--about two years to go.
Its not the headphones you will burn out, its the system that needs 300 Ohms.
Try a dab of Anusol boy!
messagenews:FPMEh.312$ snipped-for-privacy@newsfe02.lga...
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As was said, the headphones will not burn out unless you have the volume too high. If they load down the radio too much or you are woried about burning it out, add a resistor in series- it doesn't need to be 300 ohms, 100 or 150 or whatever the DC resistance of the VHF headset is. Is your new headphone stereo? If it is and the inputs are isolated from the housing, then you can make up a special connector to connect the radio to both 8 ohm inputs in series so the load would be 16 ohms, plus your extra resistor.
That is like saying would won't burn unless you heat it too high.
Bill
-- Fermez le Bush--about two years to go.
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