[NLRS] More on sequencers

[Dr. Gerald N. Johnson]

On Mon, 2006-03-27 at 16:51 -0600, Chris Elmquist wrote:
> 
> These sequencers are all cool and everything but there is still one
> fundamental problem I don't see getting solved--  namely, how do you
> keep the RF from coming out of the IF rig until all of the other stuff
> has been sequenced?
> 
> If you wire the PTT from your mic to the <start> input of the sequencer
> and then use some final tap on the sequencer to come back around and
> drive the PTT input to the IF rig, I can see how this will save things
> when you are operating with a mic.  But what do you do on CW?  What if
> the IF rig has VOX and gets accidentally enabled?
> 
> It seems like you need a way to keep the RF from coming out of the IF
> rig until after all of the downstream switching has gotten to where it
> needs to be-- otherwise, you will be driving RF into the unkey'd
> transverter or the key'd transverter will be driving RF into your PA
> before it is key'd.
> 
> I know how to do this by modifying the IF rig...  but I am still searching
> and very interested in how this is done without modifying the IF rig...
> 
> Chris NØJCF

You run key and PTT leads to the sequencer and don't run VOX. You run
the rig keying line from the sequencer to the rig which gets keyed at
the last stage of the sequence. E.g. you run microphone and key through
the sequencer.


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