K3 to K3S Upgrade Questions for Elecraft

[dhhdeh]

Wayne,

I have several questions for you as I consider the
K3S upgrade decision in the near term.

My early K3 (Feb 2008) has an early sub-receiver
installed.  I may be interested in purchasing a
K3S but would like to use my current sub-receiver
in the new K3S to keep the cost down. I believe
you indicated earlier that it is compatible and is
possible to do. So....

1. Will my original sub-receiver's DSP board also
work in the K3S? Will a new sub-receiver DSP board
work with an original sub-receiver in the K3S? Any
other considerations or suggestions?

  2. Can you summarize the changes from the early
KPA3's to the more recent KP3A?

3. Has the K3 mixer board and its circuit on the
K3 RF board undergone any changes from the early
K3's to the K3S?

Your commentary will be appreciated.

Thanks and 73 de N1LQ-Dave
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[wayne burdick]

David and Dianne on Comcast <[hidden email]> wrote:

> I have several questions for you as I consider the K3S upgrade decision in the near term.
>
> My early K3 (Feb 2008) has an early sub-receiver installed.  I may be interested in purchasing a K3S but would like to use my current sub-receiver in the new K3S to keep the cost down. I believe you indicated earlier that it is compatible and is possible to do. So....
>
> 1. Will my original sub-receiver's DSP board also work in the K3S?

Yes.


> Will a new sub-receiver DSP board work with an original sub-receiver in the K3S?

Yes.


> Any other considerations or suggestions?

No. The DSP board we're changing is the one for the main receiver/transmitter. That's the one that has the new AF circuitry on it.


> 2. Can you summarize the changes from the early KPA3's to the more recent KP3A?

The KPA3A uses different output devices that are more readily available. Otherwise specs are the same.  


> 3. Has the K3 mixer board and its circuit on the K3 RF board undergone any changes from the early K3's to the K3S?

The K3 RF board has had a few minor updates, all covered by existing mod kits. The K3S adds an attenuator section (to provide 5/10/15 dB settings) and a completely revised layout using 4 layers to reduce noise pickup and improve port-to-port isolation.

73,
Wayne
N6KR



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[Eric Swartz - WA6HHQ]

One additional note: Your old sub-receiver will require a new KSYN3A in order to be used in the K3S. Both synths in K3 and K3S must be of the same type.

73,
Eric
elecraft.com
_..._

> On May 19, 2015, at 1:59 PM, Wayne Burdick <[hidden email]> wrote:
>
> David and Dianne on Comcast <[hidden email]> wrote:
>
>> I have several questions for you as I consider the K3S upgrade decision in the near term.
>>
>> My early K3 (Feb 2008) has an early sub-receiver installed.  I may be interested in purchasing a K3S but would like to use my current sub-receiver in the new K3S to keep the cost down. I believe you indicated earlier that it is compatible and is possible to do. So....
>>
>> 1. Will my original sub-receiver's DSP board also work in the K3S?
>
> Yes.

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