Hum on AM HF receiver

February 21st 08, 09:39 PM posted to rec.radio.amateur.boatanchors

Antonio Vernucci Antonio Vernucci is offline

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First recorded activity by RadioBanter: Jun 2006

Posts: 395

Hum on AM HF receiver

Most of the strong AM signals received on my National HRO are affected by hum.

I put a ceramic capacitor in parallel to each of the 80-type vacuum diodes with
no noticeable improvement. Does anyone remember which other cure was proposed to
solve the problem?

73

Tony, I0JX

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