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Re: [IRCA] TP 11 Nov + Phasing
- Subject: Re: [IRCA] TP 11 Nov + Phasing
- From: "John H. Bryant" <bjohnorcas@xxxxxxxxxxxxxx>
- Date: Sat, 11 Nov 2006 09:56:08 -0800
Man, we really had different experiences this morning.... the
Victoria/Orcas bunch.... Maybe it was the very up/down nature of
things. For me, it was equally good/bad on both high and low bands,
with all of the usual JJ suspects being the only audio, except for
675 Viet Nam (pres.) and SOMETHING on 639. The 639 sounded East Asian
or Russian.... If I had to guess, it would be Mongolian.... Nothing
listed really makes sense.... It was almost to the level to ID the
language.... In fact, had it been CC, or JJ, I would have IDed
those. Russian and Korean, I have to hear a bit better.... but I'm
pretty sure it was neither language. About all I can say is that it
wasn't Hindi or SE Asian nor was it JJ or standard CC. Another
outside possibility would be Tagalog. It was my first pass up the
band at 1420 and my curiosity got the best of me.... so I only
listened for a minute and then went on up the band "to see what other
great DX I might be missing." Naturally, when I got back, it was 639
just a het. Mainly, though, it was a typical "bad auroral
absorption" morning. Japan there but attenuated, KK was almost not
there and China was GONE!
With the small number of TP stations this morning, I had plenty of
time to practice phasing and test its use in reducing adjacent
channel splatter, a'la the East Coast. It sure worked like a
charm. I have no trouble reducing any strong signal on MW by 40 to
45 dB very quickly (except that new Candian CJRJ on 1200). Getting an
ultimate null takes longer, but doesn't really seem that necessary
for adjacent channel work. In this RF jungle, I'm a bit ashamed that
I haven't used phasing sooner. Examples: phasing Vancouver 600
really helps 594. Phasing 650 Vancouver, really helps both 648 and
675.... where 650 overloads the receiver; phasing 740 in San
Francisco helped 738.... that was a surprise, 740 isn't THAT strong
here. Phasing 750 Portland really helped 747. That was a surprise,
too. Phasing the very sloppy 900 Victoria was significant help to
both 891 and 909. Phasing Seattle on 1090 really helped 1089,
etc. So.... I'm going to modify the Ratzlaff/Misek Phaser just a bit
so that it can also be an antenna switch for my two main antennas
here and I think that it will be a permanent fixture. I'll surely
take it to Grayland, but I expect that it will be rarely used
there.... Old Mister Sun wiping out the QRM to our East plus the
happily very remote location will likely continue to limit a phaser's
use there. I'm sure I'd use it more there if I could get excited
about Hawaiian and Alaskan stations, again.... somehow, in recent
years, they have not been very interesting to me (my problem, of
course.) As the solar cycle and time reduces the number of new TP
stations, perhaps the phaser will help rekindle my interest in those
surprisingly difficult targets, too.
I must say, I really appreciate the fine tuning pots the
Ratzlaff/Misek phaser incorporates. I use them every time that I'm
serious about achieving a maximum null. Maybe 20% of the time, the
fine tuning just confirms what I found with the course tuning.... the
rest of the time, I get a significantly better null with the fine
tuning controls.
I gotta tell you, it was an almost sexual experience to phase
740-KCBS literally down into the noise and watch the scope of the
Winradio as the spike of the carrier slowly dropped in level and then
disappeared from sight!!! Better than driving a stake through their
collective hearts. Unfortunately, I do not achieve such total
domination of the Vancouver stations :>)
Two more mornings for me this year.
John B.
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