Adding a low noise preamp into the receive line of the internal 2M trnsverter

[Howard Sherer]

Is there an easy way to add a pre amp into the receive line on the internal
K3 2M transverter?


Howard Sherer AE3T
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[wayne burdick]

Hi Howard,

The K144XV itself has a high-gain LNA producing a NF of around 1 dB. It cannot be bypassed without a PCB modification. I’d be cautious about adding another high-gain LNA directly ahead of it.

Some stations have an LNA right at the antenna to establish a low noise figure as early as possible and overcome cable losses.

Wayne
N6KR

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http://www.elecraft.com

> On Feb 24, 2018, at 4:42 AM, Howard Sherer <[hidden email]> wrote:
>
> Is there an easy way to add a pre amp into the receive line on the internal
> K3 2M transverter?
>
>
> Howard Sherer AE3T
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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[Elecraft mailing list]

Howard,

Adding an internal preamp is not a trivial task as it would mean some
surgery on the transverter board.

What makes you think that you need a preamp?   The sensitivity of the
transverter is more than adequate for all normal use and any spare funds
should be put into  new low loss feeder and better antennas.  If when
all that is up and running you still require more sensitivity then a
mast head preamp is the only way but caution is raised over using one of
high gain as it is a balancing act between sensitivity and strong signal
handling.

Good luck with improving your system.

73

Peter

G3SMT



On 24/02/2018 12:42, Howard Sherer wrote:

> Is there an easy way to add a pre amp into the receive line on the internal
> K3 2M transverter?
>
>
> Howard Sherer AE3T
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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