KX3 vs. K3 (IF for XV144)

[Samir Popaja-3]

Hello,

Does anyone have compare KX3 vs. K3 on 2m with XV-144?

Pros/ cons on either combo?

73' Samir, sm7vzx
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[David Pratt]

In a recent message, "[hidden email]" <[hidden email]> writes
>Does anyone have compare KX3 vs. K3 on 2m with XV-144?
>
>Pros/ cons on either combo?

Yes, Samir, I have used both. I like the KX3 and its internal 2m option.
The receiver is very sensitive and as it uses a 50MHz i.f. it covers the
whole of the 2m band (up to 148MHz) comfortably. However, the main
drawback is that the power output on 2m is only about 3.5W and somewhat
less when using internal batteries.

When using the K3 and XV144 combination, with an i.f. of 28MHz the
bandwidth is limited so it can only be used up to 146MHz. The power
output is up to 20W SSB and CW or half that power on AM/FM and data
modes.  One answer is to install the K144XV which switches crystals for
144-146 and 146-148MHz. However, the power is limited to around 10W on
any mode.

Hence, all three systems have their pros and cons. I hope that helps.
Doubtless others will comment.

73 de David G4DMP

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[Jim Brown-10]

On Tue,12/9/2014 7:04 AM, David G4DMP wrote:
> When using the K3 and XV144 combination, with an i.f. of 28MHz the
> bandwidth is limited so it can only be used up to 146MHz. The power
> output is up to 20W SSB and CW or half that power on AM/FM and data
> modes.

I'm using that combination. I believe that it has the greatest frequency
stability of the three. Frequency stability is the shortcoming of the
KX3 with it's internal transverter, and can be an issue with JT65.

One way to overcome that is to use an external amplifier that can be
driven at lower power. I managed to find a vintage Mirage that drives to
150W from 2W.

73, Jim K9YC
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[Samir Popaja-3]

The output isn't problem and I only need to cover 144-145MHz, I'm only
interested in contesting on 2m, CW/SSB.

I'm actually interested in sensitivity and strong signal rejection.

73' Samir, sm7vzx


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