[Elecraft] (K3) with FL2100B amp

[Iain MacDonnell - N6ML]

The issue with these older amps is that the keying voltage is
negative, which doesn't work with the solid-state output in the K3.

>From practical experience, a FL2100B will NOT work when connected
directly to the K3 - you need an interface of some sort.

    ~Iain / N6ML


On Thu, Aug 19, 2010 at 6:18 PM, Tom Boucher <tom at telemetry.demon.co.uk> wrote:
> Chuck,
>
> I don't think you're right - the K3 'Key Out' is spec'd 200V @ 5A. The FL2100 'RY' relay control switches 12V @ 200mA only.
>
> 73
> Tom G3OLB
>
> AE4CW wrote:
>>However, you will need an interface to key the amp from the K3 as the amp
>>keying voltage is not compatible with the K3.  I used a simple 12V reed
>>relay powered from the K3 12V RCA jack.
>
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