[NLRS] More on sequencers

[Chris Elmquist]

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 accidently 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

On Monday (03/27/2006 at 04:36PM -0600), Ray J wrote:
> 
> 
> db6nt sells a very small sequencer
> 
> km0t uses them i think..
> 
> http://www.kuhne-electronic.de/english/transverter/sequenzcontrolers.htm
> 
> Ray J
> 
> 
> 
> Al Bergman wrote:
> 
> >Paul Wade w1ghz has a small projects web page and sells a very nice
> >sequencer pc board. It can be found at:
> >http://www.w1ghz.org/small_proj/small_proj.htm
> >I am not sure if this will fill the bill for you but I can tell you it
> >is professionally manufactured and the price is right.  I used one in
> >for my last project which can be seen at:
> >http://www.w0blk.org/Transverter.pdf
> >This file is a pdf about 1.5 mb long and may be a little slow loading
> >but it might be a good "roll yer own" example project for some of you...
> >In fact I would appreciate comments on it...
> >73, Al
> >
> >----- Original Message ----- 
> >From: <jcplatt1 at mmm.com>
> >To: <nlrs at mailman.qth.net>
> >Sent: Monday, March 27, 2006 11:26 AM
> >Subject: [NLRS] More on sequencers
> >
> >
> > 
> >
> >>Advanced Receivers Research offers a sequencer board for $56.   You
> >>   
> >>
> >can see
> > 
> >
> >>it at http://www.advancedreceiver.com/page20.html   .   Yes, you can
> >>   
> >>
> >build
> > 
> >
> >>one, but this is a turn key approach and with the board size of 2.5" x
> >>   
> >>
> >3.5"
> > 
> >
> >>it may fit inside the DEM transverter making for a tighter design.
> >>Anyone using one of these ?
> >>
> >>73, Jon
> >>W0ZQ.
> >>
> >>_______________________________________________
> >>NLRS mailing list
> >>NLRS at mailman.qth.net
> >>http://mailman.qth.net/mailman/listinfo/nlrs
> >>   
> >>
> >
> >_______________________________________________
> >NLRS mailing list
> >NLRS at mailman.qth.net
> >http://mailman.qth.net/mailman/listinfo/nlrs
> >
> >
> >
> >
> > 
> >
> 
> _______________________________________________
> NLRS mailing list
> NLRS at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/nlrs

-- 
Chris Elmquist
mailto:chrise at pobox.com