Gamma P/S

[w8crh]

Hi Wayne,  I have the Gamma HPS-1a small switching supply....Alas....I
am way down
the list for receiving my KX3, due to having ordered the morning of
12/28.  I have not heard any hash when using my other portable rig but I
was wondering if any of the Elecraft staff or
field testers have given the Gamma a try.
vy73'
SEMPER FI
Steve W8CRH
______________________________________________________________
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

[Rick Tavan N6XI]

I used the HPS-1a a few times with my FT KX3 and didn't notice any problems
with RFI. But my test was in no way comprehensive. When it comes back from
volunteer duty on the front lines in Watsonville, I plan to do more
thorough testing.

I bought the Gamma PS to drive a 100W K3 when size and weight are of the
essence and I like it for that. I'm using it with the KX3 because I have
it. If I were to buy a PS just for a barefoot KX3, I would go for a more
conventional design, probably a linear supply, because it wouldn't have to
be any bigger or heavier than the Gamma.

/Rick N6XI

On Fri, Apr 6, 2012 at 6:31 AM, w8crh <[hidden email]> wrote:

> Hi Wayne,  I have the Gamma HPS-1a small switching supply....Alas....I
> am way down
> the list for receiving my KX3, due to having ordered the morning of
> 12/28.  I have not heard any hash when using my other portable rig but I
> was wondering if any of the Elecraft staff or
> field testers have given the Gamma a try.


--
Rick Tavan N6XI
Truckee, CA
______________________________________________________________
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

[Sverre Holm (LA3ZA)]

I have Gamma HPS-1a small switching supply which I use with my K2 + KPA100 as an easily movable rig. I always use it to feed a ladderwire via a balun to a nonresonant antenna. Therefore the feedline may pick up stuff very close to the power supply (i.e. 1-2 m away).

I have noticed that on 15 meter CW, I often hear a swooshing noise right after I have transmitted. It is very annoying as it comes right at the time when one listens for the other stations to confirm reception in e.g. a contest. I think it is a frequency varying noise that sweeps over my frequency as the load on the power supply changes. I would very much like to learn of a way to suppress it,

Sverre/LA3ZA
http://la3za.blogspot.com/

[Sverre Holm (LA3ZA)]

Sverre Holm (LA3ZA) wrote

I always use it to feed a ladderwire via a balun to a nonresonant antenna.

This was a bit unclear. From the KAT100 a short coax goes to a balun, then to the ladderwire which goes outside to the antenna.