Pete,
Was that a W1GEE Opto Circuit
there are different flavors of Opto Circuits
N6KI
On 11/10/08, Pete Smith <n4zr@contesting.com> wrote:
> At 09:02 PM 11/9/2008, Dennis Vernacchia wrote:
>>Mal,
>>
>>Also W1GEE makes em
>>
>>http://www.hosenose.com/interfaces.asp
>>
>>Be sure the one U buy uses an Opt Coupler typr device and not descrete
>>transistor(s) - The Optos are far more reliable !!!
>>I know W1GEE uses the Opto circuits
>
> Except that, with some radios, some optocouplers do not pull the key or PTT
> lines down close enough to zero. I'm sure there are tricks to this - the
> selection of the optocoupler or some sort of "pull-down" - but with garden
> variety ones, neither my TS-930 or Mark 5 worked properly. The 930
> wouldn't PTT, and the Mk5 wouldn't key CW.
>
> 73, Pete
>
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