[Elecraft] K3 Amplifier Keying

[Jed Petrovich]

Phil:

Here is a kit to consider... it's easy to assemble.

http://www.hamgadgets.com/store/product_info.php?cPath=21&products_id=75

Jed
AD7KG

On Wed, Dec 16, 2009 at 3:24 PM, Paul Christensen <w9ac at arrl.net> wrote:

> Phil,
>
> The closest you're going to get to plug-'n'-play amplifier isolation is by
> purchasing a commercial keying buffer, one for each amp and split the K3
> key
> line three ways to the input of one of these devices.  The output from each
> device would go to its own amp.  For three devices that's USD $90-$180
> depending on the model + the cost of cables.
>
> http://www.theheathkitshop.com/page13/page13.html
>
> http://www.radiobooks.com/products/svkr.htm
>
> http://www.ameritron.com/Product.php?productid=ARB-704
>
> By contrast, three silicon diodes can be purchased with pocket change and
> can be easily inserted into RCA plugs with just a bit of soldering
> necessary.
>
> Paul, W9AC
>
> ----- Original Message -----
> From: "Phil LaMarche" <plamarc1 at verizon.net>
> To: "'Paul Christensen'" <w9ac at arrl.net>; <elecraft at mailman.qth.net>
> Sent: Wednesday, December 16, 2009 4:58 PM
> Subject: RE: [Elecraft] K3 Amplifier Keying
>
>
> >
> > Wow!  Not being an engineer, I didn't think it would be so difficult.
> > Many
> > replies, thank you.  Is something commercially availiable for a non
> techie
> > like me?
> >
> > Phil
> >
> >
> > Philip LaMarche
> > LaMarche Enterprises, Inc.
> > www.instantgourmetspices.com
> >
> > www.w9dvm.com
> > 800-395-7795 pin 02
> > 727-944-3226
> > FAX 727-937-8834
> > NASFT 30210
> >
> > K3  #1605
> >
> > CCA 98  00827
> > CRA 1701
> >
> > W9DVM
> >
> >
> >
> > -----Original Message-----
> > From: elecraft-bounces at mailman.qth.net
> > [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Paul Christensen
> > Sent: Wednesday, December 16, 2009 4:50 PM
> > To: elecraft at mailman.qth.net
> > Subject: Re: [Elecraft] K3 Amplifier Keying
> >
> > Phil,
> >
> > You may want to isolate all three key lines using one of the many keying
> > buffers available.  At an absolute minimum, consider using three steering
> > diodes if only using a splitting RCA jumper cable from the K3 to the
> amps,
> > using one diode (e.g., 1N4007 or if necessary, a Schottky type) for each
> > amp
> > key line from the K3 with all the cathodes combined together and pointing
> > back to the K3 amp key line.
> >
> > The ne-plus-ultra solution for selecting one of three amps from one of
> > three
> > rigs may be available in the very near future from W8ZR...
> >
> > http://www.w8zr.com/homebrew/StationPro.htm
> >
> > Paul, W9AC
> >
> > ----- Original Message -----
> > From: "Phil LaMarche" <plamarc1 at verizon.net>
> > To: <elecraft at mailman.qth.net>
> > Sent: Wednesday, December 16, 2009 4:28 PM
> > Subject: [Elecraft] K3 Amplifier Keying
> >
> >
> >> My K3 will be keying 3 amplifiers....144...50 and HF.  I have two amp
> >> keyers
> >> that can be used or just one.  Should I find an RCA cable with 3 females
> >> and
> >> one mail or does anyone have a better suggestion.
> >>
> >> Thanks
> >>
> >> Phil
> >>
> >>
> >> Philip LaMarche
> >> LaMarche Enterprises, Inc.
> >> <http://www.instantgourmetspices.com/> www.instantgourmetspices.com
> >>
> >> www.w9dvm.com <http://www.w9dvm.com/>
> >> 800-395-7795 pin 02
> >> 727-944-3226
> >> FAX 727-937-8834
> >> NASFT 30210
> >>
> >> K3  #1605
> >>
> >> CCA 98  00827
> >> CRA 1701
> >>
> >> W9DVM
> >>
> >>
> >>
> >> ______________________________________________________________
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