Re: [WriteLog] CW direct keying

[Jay WS7I <ws7ik7tj@gmail.com>]

Everything you need.  This is on my EWARG (Eastern Washington Amateur 
Radio Group) page. htt://www.ewarg.org  Its down at the bottom of the 
main page and a PDF.  I would add
one more for CW that is just like the PTT and FSK.

Jay WS7I


On 7/7/2014 10:37 AM, Steven Kline wrote:
> Hi Bryan,
>
> Is it possible to provide optoisolator diagram similar to Don’s diagram for simple transistor 
> interface?  Quite a few may be interested in building isolated circuit.  I’ve built the interfaces 
> from Don’s diagram and worked great, were quick and fast interface solution.  Perhaps with little 
> more time and planning available I’d have built the optoisolators too.
>
> Cheers - Steve W5JK
>
>   
> On Jul 7, 2014, at 12:01 PM, Bryan Swadener via WriteLog <writelog@contesting.com> wrote:
> > Hi Don,
> >
> > That simple transistor interface offers zero ground loop
> > isolation between the PC and the rig. I used a dual
> > optoisolator IC to provide isolation  before switching to
> > a fancy Rigblaster Pro (which uses optoisolators).
> > Then, I added a WinKeyer to get away from the
> > corrupted Morse problem.
> >
> > Now that I'm having problems with the DVK function and not
> > finding a cure, I've decided to go with a simple homebrew
> > passive AF line-level mixer interface using better
> > transformers than are used in the RB interface.
> > Thanks to Steve N9OH for trying to help.
> >
> > vy 73,
> > Bryan WA7PRC
> >
> > Date: Sun, 6 Jul 2014 18:12:41 -0500
> > > From: "Don Hill AA5AU" <aa5au@bellsouth.net>
> > > To: <writelog@contesting.com>
> > > Subject: Re: [WriteLog] CW direct keying
> > >
> > > You can build a simple CW transistor interface. Diagram here:
> > >
> > > http://aa5au.com/rttyinterface.html
> > >
> > > 73, Don AA5AU
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