[Elecraft] solid state hf amp

[Bill Coleman]

westalto at comcast.net wrote:
> I've used an Ameritron / MFJ ALS-600 for about 5 years and it works well. Also have the 
>
> Ameritron QSK-5 pin diode switch, a nice combo that gives you full QSK. However, if 
>
> you need customer service, forget it! 
>
>
>
> BTW, I noticed in the latest QST that Array Solutions has a QSK box that "looks like" 
>
> a QSK-5 but uses a high speed vacuum relay rather than pin diodes. If the relay is 
>
> quiet I think it should be more robust than the diodes. 
>
>
>
> Doug 
>
> W6JD...K3 #23, K2 #1626 
>
>   
I don't know what vac relay that Array Solutions is using, but I built a 
QSK switch per Phil Salas AD5X  article 
(http://www.ad5x.com/images/Articles/QSKrevB.pdf).  I used  a  Gigavac 
relay and the relay noise  is many many dB under the fan of my amp, 
works like a charm too!
Bill N2BC