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** You have some hearing damage ?Or is that what some dopey "audioligst" told you.
** The transformers are nasty cos they have no low end.IIRC, the spec reads " 250Hz to 15kHa +/- 2db. "
Typically the low end ( ie all the bass ) will be riddled with core saturation distortion too - so massive IM of the whole audio band.
A radio ham built it...
..... Phil
Just a non-audiologist self-test with a headphone amp, sine generator, and AKG K240s. It's hard to say exactly where I can hear nothing at all. Definitely, nothing after about 14k. I can hear a little at 13k, maybe.
I thought that was fairly normal for presbycusis for around 40. Girlfriend is 33 she can hear to 15k.
I've been an electric guitarist off-and-on since I was 15 but rarely played at high volumes.
THIS is a (step up) input transformer:
rated at 500Hz-14kHz, at 1 watt. It can do much better than that at lower power. It weighs about 3-4 lbs so I've tried not to drop it on my feet by mistake
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** Think that is a bit below average for 40.Had your ears de-waxed by a doc lately?
** Women have better HF hearing - many teenage girls can hear up to 22kHz .Hence the "audio band is defined as " 22 to 22kHz "
A number of such were employed in testing done by the BBC, Philips and Sony to establish limits for LPFs ( anti ailiasing ) for digital audio.
** Explains a lot ...** You can get perfectly nice input transformers, low cost an fully mag shielded well under the size of a golf bal. But no radio have would have the faintest about that.
..... Phil
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