Hello, all...
Much thanks for previous assistance.
Running spectogram on #5759 yields the following "indications:"
- stop band for CW filters around 30-40 dB
- using a 440 side tone, all CW filter bandwidths show a series of higher
frequency "humps" [less attenuation] with the following characteristics:
main pass band: 440 cps
1st "hump:" 1345 cps, -12 dB [reference main pass band]
2nd "hump:" 2250 cps, -25 dB
3rd "hump:" 3150 cps, -30 dB
The "humps" are less noticeable with wider main pass bands and more
noticeable as the pass band is narrowed. They look like a series of
diminishing wave peaks at regular intervals. I could have gone a few more
that the three noted above, but they get washed out eventually. Any Comments?
Thanks.
...robert
Robert G. Strickland PhD ABPH - KE2WY
[EMAIL PROTECTED]
Syracuse, New York USA
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