Rick? ???

?edited /fractured a bit ???????????

Re ??Back to the original "Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY" subject of this thread,

I think topics get started before they get properly thought out; this one is not bad but perhaps too specific and not quite what was intended

?I forgot all about? Halden’s?? actual title???? …”transformer failure ?due to rapid? ?STBY-->OFF-->STBY” ?I think that nobody read the word phrase that Halden actually wrote in the title. ?It seems to me? the general? switching? involving ?????the “STBY” position has been grouped into one PROBLEM AREA, so the real failure condition has been diluted into muddy waters, ??EXCEPT THAT? ?THE “STBY” SWITCHING IS ALWAYS INVOLVED

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I would like to remind us all that Halden ??later re-worded? his concern? in??? /g/HallicraftersRadios/message/30429 ?saying partly..

“I still wish to understand how turning the transmitter off without a pause in STBY, or turning it fully off and immediately on again, can cause a voltage spike between these windings that’s substantially in excess of what occurs during operation, and could cause an arc between windings and thus deteriorate the insulation at the arc site.?“…. Etc? ?

There are still two situations in that question:? turning “to OFF” and turning “away from OFF”

Personally, I think its worth considering any/all the situations. But it is hard to sort them out, as we have seen

?there's isn't any mention of doing this.? Agree ?

The only "Caution" is to pause in STBY before turning it off ???????and they don't say why.? ?

Agreed on both points long ago ,a n d? …. they don’t say why because they have red faces, and can’t easily fix the problem- only a US ?senate inquiry would extract the true culprit.

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As to some other comments it seems that the switching caution/problems and ?transformer failures were all part of the new stuff in 1959 and not related to age, but things do deteriorate years later also ?

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