[600MRG] modeling tutorial

[D.J.J. Ring, Jr.]

AL7N is a fellow with lots of 600m experience, he was one of the last WT
operators at Alascom's WKR Nome Radio installation in the 1980s.

http://radiomarine.org/gallery/show?keyword=WKRIRT&panel=pab1_7

Nome Radio/WKR was once part of the US military “Washington-Alaska Military
Cable and Telegraph System” (Affectionately referred to as “WAMCATS”.

How long ago did his antenna system get upgraded?  He has had a very good
to excellent signal on 14050.0 kHz for quite a long time.

What is he running?  If he isn't using a beam pointed this way, I'm really
impressed as I've called him without a schedule on that frequency he
listens there and 3550, 7050 and 14050 like a coast station!  He came up
and had a 589 signal sometimes, mostly 56 to 579 which is a great signal
into Massachusetts from Fairbanks where he now resides.

73
David
N1EA

On Mon, Sep 7, 2015 at 6:21 PM, Kenneth G. Gordon <kgordon2006 at frontier.com>
wrote:

> On 7 Sep 2015 at 17:48, D.J.J. Ring, Jr. wrote:
>
> > Rev. Rudy, "Hallowed Preacher of LF (and MF)," pray tell which is
> "better"
> > to invest time in?
> >
> > 4NEC2 or EZNEC?
>
> I found both of those to be somewhat difficult after trying them. They are
> not
> "intuitively obvious" let's say.
>
> At the suggestion of a ham on the ham-antennas forum, I tried a
> German-Japanese antenna modeling package named MMANA-GAL, which,
> like EZNEC, is free to download in its "basic" version.
>
> I was able to model several antennas with that, within only a day or two,
> and
> the results were very good.
>
> In fact, I was able to help an Alaskan ham, AL7N, whose forte is emergency
> traffic handling by CW, get rid of his "worm-warmer" and install an antenna
> which works far better even in his too-small lot.
>
> I was able to prove that his original "worm-warmer" was exactly that. After
> installing what I came up with using MMANA-GAL, his signal into the states
> improved quite a bit. From S-3 to S-4, to S-7 to S-9, to those stations
> with
> whom he regularly communicates. We were all very pleased.
>
> I was also able to prove to both him and to me that my vertical was causing
> an at least 15 dB reduction in MY signal level to his horizontal one, and
> vice
> versa, even on 20 meters. I had not thought that cross-polarization would
> make that much difference at HF, but apparently it can.
>
> Ken W7EKB
>
>