Yup, I sat close to a Linkurt Microwave transmitter for about 15 years,
(the power supply was an early switcher, and hence very loud), then next
to three Ampex VR1200's VTRs... All are horrific noisemakers.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 3/13/21 11:15 PM, Jim Brown wrote:
On 3/13/2021 9:37 PM, Dave Cole wrote:
I had a hearing test many years ago, and asked to see the results.
Turns out I had a null at some frequency I don't remember right now,
but it was exactly where I had selected my sidetone to be... My guess
is because I heard less noise there... Anyway--
I re-selected a new sidetone, lower in frequency, and on a small
peak... My CW speed for copy increased probably 10-15%.
One of the most common forms of hearing loss starts at the high
frequencies and works its way down with age, but that's far from
universal. When one or more notches develop at certain frequencies, it's
often the result of noise exposure at work.
73, Jim K9YC
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