[Amps] Amps Digest, Vol 146, Issue 13

[Alek Petkovic]

On 8/02/2015 5:54 AM, Randy wrote:
> On 2/7/2015 12:00 PM, amps-request at contesting.com wrote:
>
>> Message: 3
>
>> When I was a kid, a local department store had some kind of 
>> ultrasonic alarm system that drove me nuts. I used to also be able to 
>> hear the 15 kHz sound from TV sweep oscillators. One of the 
>> advantages of growing up is not hearing these any more ! 73, Steve, N2IC
>
> For whatever reason, people that has asthma as children have enhanced 
> ability to hear "ultrasonic" sounds.
> I didn't have it, but even at 55  years of age, I can still hear CRT 
> sweep oscillators.
>

Yeah. I remember that sound.

Sounds a lot like the wife does, these days.

Alek
VK6APK

-- 
 From sunny Binningup, Western Australia.