[Elecraft] Power Supplies

[Drew AF2Z]

I have an endfed wire antenna for the low bands so there is RF in the 
shack which needs to be managed. In such a case a field strength meter 
is handy in figuring out how to arrange equipment, cables, keyboards, 
etc and placing ferrite toroids and snap-ons for best results. I use an 
old Simpson 374 microameter with a germanium diode across the terminals 
(cathode to plus terminal); it makes a good RF sniffer...

73,
Drew
AF2Z


On 07/16/16 08:28, Kevin - K4VD wrote:
> Hi Howard and thanks for your explanations and patience. I need to do some
> more testing a little later on with the KX3 on the RS-50. If I remember
> right, I could hear the hum and hiss from the RS-50 only when the antenna
> was attached. I think that goes along with what you are saying and I just
> need to wrap my mind around that. I am prepared to deal with RF issues
> while transmitting but not so prepared to think the problem could show up
> during receive also.
>
> So far I've added the NI4L HF Choke/Line Isolator just under the BALUN at
> the feedpoint and another just at the rig. I've also added a few snap-ons
> to the DC cord between the RS-50 and the radio at the RS-50 side. I want to
> add more as soon as I can find the rest of them or possibly replace them
> with the 2.4" ferrites at your site.
>
> After doing the above I've noticed my tuning points have shifted a bit. I
> need to get the analyzer on it to see by how much. I also *maybe* noticed a
> reduction in noise on the Flex but to tell you the truth, I never really
> noticed it on the Flex, only the KX3 made it obvious being able to switch
> from battery to external power supply.
>
> I need to do a little more testing if I can find the time this weekend. I
> see the 2.4" ferrite core on your website and will probably place an order
> for a couple/few. Does something like this go on each end of a line or do I
> pick an end?
>
> Thanks again,
> Kevin
>
>
>