amplifier imbalance

[ppppenguin]

As we get older our hearing gets worse. I haven't measured mine (I'm 65) but I know that my left ear is more sensitve than the right and the hearing is clearer in the left, though that's a very subjective judgement. The real surprise came the other day I was running a 405 line monitor. THe 10125Hz whistle was quite loud so I decided to block each ear in turn as a test. I was very surprised that my right ear, the one that's worse for most purposes, can hear 10125Hz clearly while the left ear can hardly hear it at all.

625 line whistle (15625Hz) is now no more than a vague impression that it's happening.

Flat panels are silent, so line whistle is now history except for vintage TV enthusiasts