[K2] Adding amplifier PTT out to K2

[Elecraft mailing list]

Dear Gang:
I know one could take the PTT signal from the now-discontinued K60XV board, and it is provided on the K2/100 lid, but are there any other option boards that one can use to provide an external PTT signal?
If not, is anyone making the N0SS ptt out boards?  I'm trying to avoid the perfboard route.
Thanks
73 Eric WD6DBM

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[Don Wilhelm]

Eric,

Send an email to FAR Circuits to see if they have the N0SS Amp Keying
Circuit for the K2 available.

If you must go the perfboard route, it is not difficult if you follow
the board layout shown on Tom Hammond's (SK) website
http://www.mmccs.com/mmarc/n0ss/index_k2.html.  Most of the connections
can be made using bent over component leads if you follow Tom's board
layout.

There are few other viable alternatives to sourcing the output from the
8R signal line.

73,
Don W3FPR

On 2/4/2020 8:48 PM, eric norris via Elecraft wrote:
> Dear Gang:
> I know one could take the PTT signal from the now-discontinued K60XV board, and it is provided on the K2/100 lid, but are there any other option boards that one can use to provide an external PTT signal?
> If not, is anyone making the N0SS ptt out boards?  I'm trying to avoid the perfboard route.
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[K1FFX]

Don Wilhelm wrote
> Send an email to FAR Circuits to see if they have the N0SS Amp Keying
> Circuit for the K2 available.

Don -

I contacted FAR Circuits about the N0SS Amp Keying Circuit, and heard right
back from Fred.
He can, in fact, supply that PCB (as well as, he informed me, a PCB for the
K2 fixed audio
output mod).  I'll be ordering the N0SS board when I get back North next
month.

Is there an "original" document that went along with the N0SS circuit, which
might
suggest where/how to mount the board, and where to pick up the K2's 8R
signal?

Thanks!

- Bruce K1FFX





-----
Bruce Rosen
K1FFX
K2/100 6982 KSB2 KAT100-1 KAF2 KIO2

--
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[Don Wilhelm]

Bruce,

As original as it gets is Tom's own documentation.  BTW, the board
header goes in K2 RF Board J13 which has power for the circuit as well
as the 8R signal.  Solder the header into J13 and mount the output javk
on the rear panel - populate the board and plug it in.

Go to Tom's website preserved at http://www.mmccs.com/mmarc/n0ss/.
Scroll down to Elecraft K2 - Related Files.  On that page you will find
the K2 (BASIC) External T-R Relay Driver.  Click on that link to open
the .pdf document.  The parts list Mouser numbers may have changed, but
otherwise the parts list is complete.

73,
Don W3FPR

On 2/7/2020 4:18 PM, K1FFX wrote:

>
> I contacted FAR Circuits about the N0SS Amp Keying Circuit, and heard right
> back from Fred.
> He can, in fact, supply that PCB (as well as, he informed me, a PCB for the
> K2 fixed audio
> output mod).  I'll be ordering the N0SS board when I get back North next
> month.
>
> Is there an "original" document that went along with the N0SS circuit, which
> might
> suggest where/how to mount the board, and where to pick up the K2's 8R
> signal?
>

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