Re: (K3) with FL2100B amp

Posted by Iain MacDonnell - N6ML-2 on Aug 19, 2010; 6:37pm
URL: http://elecraft.85.s1.nabble.com/K3-with-FL2100B-amp-tp5441509p5441597.html

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 <[hidden email]> 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.
>
> ______________________________________________________________
> 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
>

______________________________________________________________
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