[TenTec] AUX Keying OminiVI Plus

[Dr. Gerald N. Johnson]

On Sat, 2007-05-26 at 11:03 -1000, Ken Brown wrote:
> Or if you don't want even the tiny click of a reed relay (someone has 
> claimed it is not true QSK if you can hear a relay click) you could use 
> an optocoupler. LED in optocoupler only needs a few mA, not enough to 
> bother that transistor, and no inductive kickback. Maybe even faster 
> than a tiny reed relay.

Typically a lot faster than a reed relay, microseconds instead of
milliseconds.

There are some LED driven couplers that have a stack of photodiodes that
makes enough voltage to drive the gate of a power MOSFET with no other
circuitry on that gate. Made by IRC the last I looked. Probably slightly
slower than the phototransistor output optocoupler.
> 

-- 
73, Jerry, K0CQ,
All content copyright Dr. Gerald N. Johnson, electrical engineer