If all receivers on the bus (yes, it is a bus) were to obey the rules
to have a pullup resistor and a steering diode we would not have the
problem of "false power" to devices on the bus.
Of course, they would fail to work with older Yaesu transceivers that
source voltage for a logic high and are open circuit on logic low.


73,

   ... Joe, W4TV


On 3/1/2018 7:58 PM, ab2tc wrote:
Hi all,

I was reluctant to respond again to this long thread, but I will.

If all receivers on the bus (yes, it is a bus)  were to obey the rules to
have a pullup resistor and a steering diode we would not have the problem of
"false power" to devices on the bus. This would be proper engineering
practice which has unfortunately been ignored by the the ham community for
years.

AB2TC- Knut



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