KXPA100 with Other Radios

[Jose Rivera]

I am a happy KX3, KXPA100 owner.  I had the opportunity to obtain a Flex-1500 radio. I want to use the
Flex-1500 with the KXPA100, since the Flex is a qrp radio.

My question: Do I have to have a cable running into the KXPA's PTT plug or can the KXPA100 be keyed up by
the Flex-1500 via just coax connections?

I am terrible making cables and soldering, which is why I am loath to attempt to make a cable. And no one
seems to sell such a cable. The Flex-1500 has a nine pin female DIN, While the KXPA100 has an RCA PTT.

 

Jose

N2LRB

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[Elecraft K3]

Hello List,

Sorry for the OT posting but I want to share my new antenna.  My K3 and this antenna have been a joy to operate.

Here is the blog on it for anybody who might be interested:

http://hankstamper.tumblr.com/post/149327414925/full-sized-20m-rotatable-dipole-project

73 de Eric, KG6MZS
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[Don Wilhelm]

Jose,

See page 18 of the KXPA100 manual.  Yes, you must provide a connection
that grounds the PA KEY connection to the KXPA100.

I do not know of a commercial cable that will provide KEYOUT from the
Flex to the KXPA100.

If you are not able to build the cable yourself due to whatever
problems, perhaps you can find a local ham who would be willing to
assist you with the soldering and cable construction.  Look for a ham
who has been licensed for many years (likely has a 1X3 call).  We used
to build our own gear and questions like this rarely came up.  We were
all expected to be able to do soldering and follow a schematic by our
peers.  Sadly, those days seem to be no longer the norm.

73,
Don W3FPR

On 10/14/2016 6:58 PM, Jose Rivera wrote:
> I am a happy KX3, KXPA100 owner.  I had the opportunity to obtain a Flex-1500 radio. I want to use the
> Flex-1500 with the KXPA100, since the Flex is a qrp radio.
>
> My question: Do I have to have a cable running into the KXPA's PTT plug or can the KXPA100 be keyed up by
> the Flex-1500 via just coax connections?
>
> I am terrible making cables and soldering, which is why I am loath to attempt to make a cable. And no one
> seems to sell such a cable. The Flex-1500 has a nine pin female DIN, While the KXPA100 has an RCA PTT.
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[Vic Rosenthal]

Rotary dipoles work! It's remarkable how directive a dipole can be. And you don't have to worry about LP vs. SP propagation.
I also have a full size 20m version. I wrote an article about how I made it work on all the bands from 40-10 meters with high power (1.2 kW):
http://cwops.org/newsletter/2016/08scopy16aug.pdf

Vic 4X6GP

> On 15 Oct 2016, at 02:38, Elecraft K3 <[hidden email]> wrote:
>
> Hello List,
>
> Sorry for the OT posting but I want to share my new antenna.  My K3 and this antenna have been a joy to operate.
>
> Here is the blog on it for anybody who might be interested:
>
> http://hankstamper.tumblr.com/post/149327414925/full-sized-20m-rotatable-dipole-project
>
> 73 de Eric, KG6MZS

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[Elecraft K3]

Thanks for the flowers Ron.  The one compromise I ended up making was not getting the aluminum up a full half wave in the air.  Fully half the directionality is down a steep hill, so electrically it meets that criteria. However the other half is back into the hillside so in that direction not so much.  It has still been a very worthwhile pursuit.  This antenna beats my 80m @ .5 wave doublet multiband antenna.

I hope this has been helpful.

73 de Eric, KG6MZS


> On Oct 14, 2016, at 7:43 PM, Ron D'Eau Claire <[hidden email]> wrote:
>
>  A rotatable dipoles offer an advantage when
> they are up high enough (>1/2 wavelength) to provide significant
> directivity.

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