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Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY

 

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Scott,

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I worked on three phase power supplies that had some premature transformer failures.

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The engineers had us install MOVs across the primary windings for all three phases.

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Never seen another transformer failure afterwards.

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Dave

W9HF

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From: [email protected] [mailto:[email protected]] On Behalf Of Scott Petersen
Sent: Thursday, July 4, 2024 3:16 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] HT-37 transformer failure due to rapid STBY-->OFF-->STBY

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I wonder if a MOV could be somehow used to soften the inrush, if not one perhaps 2 in some kind of toggle arrangement.

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