Remote Power On Switching?

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The 6000 series hardware manual calls for shorting the remote power on center pin to ground to power up the radio, a pin that measures about 3.3 volts DC when open.  I see discussions about pulling this pin to ground using a relay, but am curious if anyone has successfully used an optoisolator like a 4N25 or an open collector transistor switch? 
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Roger Thompson AD5T

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Posted 3 years ago

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WX7Y

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I'll bet if those two transistor devices you mentioned don't put down far enough to cause the remote power to turn on a FET 2N7000 will work just fine, the 2N7000 FET junction pull down to ground with a lot less resistance in the gate then a transistor. 
The FET doesn't require any more components then a open collector transistor depending on what your using to use to switch the device from HI to LOW if it happens to be inverted then it will require 2 devices and a pull up resistor just like a transistor. 

73's
Bret
WX7Y
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IW7DMH, Enzo

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Hello Roger,

in my last project I am using a 4N35 with success.
I drive it using a Arduino Due digital pin through a 220 ohm resistor.
In the same project I use another 4n35 to key the rig using the accessory port. It is very fast and totally silent.

73' Enzo
iw7dmh
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k3Tim

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From teh 4N25 datasheet, the Collector to Emitter saturated (CEsat) will be less than 0.20 Volts. This should easily control the 3.3V-DC input, pulling it low. The drive current of the LED (50 mA) should be noted.

Good Luck,

k3Tim
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IW7DMH, Enzo

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Just FYI,

I want to highlight the Orion G3NA solid state relay.
I am using it for my remote AC switch and I can drive it using a straight output Arduino port (@5V).
G3NA relays are rated for different input voltages (5-24VDC) and for different output loads (5 to 90A @ 24-240VAC) .
They are used for a lot of domotic applications and it seems they are very reliable.

73' Enzo
iw7dmh