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Author Topic: Interesting audio pass band circuit  (Read 1918 times)
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Opcom
Patrick J. / KD5OEI
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« on: April 01, 2025, 01:08:41 AM »
This audio circuit from old Ham Radio magazine passes only the audio frequency bandwidths which carry the most intelligence.
* Improving Speech Intelligibility.pdf (1294.85 KB - downloaded 189 times.)
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Radio Candelstein
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« Reply #1 on: April 01, 2025, 07:45:01 AM »
That would be good to try out on 7,200 since there's not much intelligence going on there.    Grin
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- Jeff
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« Reply #2 on: April 01, 2025, 10:51:32 AM »
Often referred to by Don, K4KYV as 'space shuttle' audio! Wink
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Mike(y)/W3SLK
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AC0OB - A Place where Thermionic Emitters Rule!
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« Reply #3 on: April 01, 2025, 05:41:30 PM »
Quote from: Opcom on April 01, 2025, 01:08:41 AM
This audio circuit from old Ham Radio magazine passes only the audio frequency bandwidths which carry the most intelligence.

Well, this might be used for a receiver, but the input and output impedances are totally wrong for transmitters.
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Opcom
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« Reply #4 on: April 03, 2025, 10:51:37 PM »
pleasse see the atachment on this. ;-)

* read me first.png (13.94 KB, 590x257 - viewed 216 times.)
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Radio Candelstein
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