In some Yaesu rigs of the 80s the power was switched on by a POLARISED relay. It will not latch if the
polarity is reverse. This is a possible no voltage loss solution!
A diode can be used in series with a regular relay too.
Raj
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At 11/12/2017, you wrote:
The better news, you can get them all day long from Tayda for 16 cents each. But they only have 119,418 of them in stock. To the US, shipping from Tayda is only a week for their slow boat shipping. Tayda's minimum order is $5, so for another $3 and change you can get that replacement nano!
Vince.