-----Message d'origine-----
De : topband-bounces@contesting.com
[mailto:topband-bounces@contesting.com] De la part de K9AY
Envoyé : mercredi 19 octobre 2005 19:15
À : paul@w8aef.com; Ford Peterson; topband@contesting.com
Objet : Re: Topband: Engineering ?? @ relays
Part of K9ay's msg.
As others have pointed out, RX switching relays can be more troublesome
than
TX switching due to contact oxidation. I used sealed relays in my K9AY
loops,
K9AY
We encountered this problem in audio freq switching years ago, even with
sealed relays. The cure, let flow a DC current of some mA
similtaneously with the micro Amps of the functional AC signal.
Jos on4kj
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