Wes,
We are using EU22i generators, which are the newer version of the EU2000.
You can only hear their noise in a quite place, Also, we are running three
of them paralleled and their noise adds up because they are synchronized.
Anyway, using a bunch of chokes and additional grounding, we got the noise
on 160 m down to an acceptable level. Also, we now have a well situated DHDL
RX antenna that is pointed towards NA . Last night had no problem copying
NA.
TKS for all the suggestions.
GL and 73,
George
On Sat, 10 Aug 2024 21:51:45 +0000 (UTC) Wes Stewart wrote:
George,
I'm not being critical, just curious, I don't have a lot of experience, but
I've used my EU2000 for a couple of Field Days and from a lot of RV sites and
have never even tried to ground the thing. I park it 50-75 feet away, run an
extension cord to the equipment and have at it. Of course I've never been on a
quiet island but I've not had issue.
Also, you've done this before from Samoa and other places (200K QSOs I believe)
have you not seen this before? What is different this time?
Wes N7WS
On Saturday, August 10, 2024 at 12:03:21 PM MST, GEORGE WALLNER <aa7jv@atlanticbb.net> wrote:
Jim,
We are using all of the cores you have given me. They help, but it is hard
to get a good ground at the top-end of the beach where the sand is very dry
and rocks prevent rods getting driven deep enough to reach moist ground.
Yesterday, a bit desperate, ran a 70 foot long GND wire to water, but I
doubt it is doing much good. We got chokes on most coax and control cables
but without good GND their effect is limited.
Using a single #31 2" core, how many turns of RG-6 do you think will give
decent choking effect? (I know, it depends on the GND and other loading
factors.)
TKS for all the ferrite cores! Will let you know if we need more!
GW
On Sat, 10 Aug 2024 11:48:34 -0700 Jim Brown wrote:
Hi George,
Remind me where to send you more cores for your next trip. :)
In the meantime, try grounding the generator chassis (and/or grounding pin) to
a driven rod (or to screen/radials if you can't drive a rod). I've seen reports
that this can be effective with some generators on some bands.
73, Jim K9YC
Set up a DHDL RX antenna yesterday but it was picking up generator noise. Will
move it today to reduce noise.
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
|