That seems to be a reasonable situation Jim ?.
After running the wspr system for a considerable time, with the 504
carrier in the pass band, it seems 'not' to cause false decodes as I
originally feared, from this, I would suggest that the top section of the
band be retained for wspr usage , possibly raising the dial set 100 hz ?
As I am 'fortunate' (?) to receive the 504 signal at a level where the
'am' modulation may be resolved at times , it can be observed that a
clear window exists close in to the carrier frequency, approaching 100 hz
wide, the same exists on the hf side of the signal, wide enough for wspr
operations.
This may also be beneficial to the g4jnt multi mode beacon, which, due to
antenna 'q' may not welcome a change of tx frequency from the top to the
bottom of the band dictated by mode ?
G ..
--------------------------------------------------
From: "James Moritz" <[email protected]>
Sent: Monday, September 21, 2009 7:30 PM
To: <[email protected]>
Subject: Re: LF: Re: US 500-kHz band plan
Dear Graham, LF Group,
As the European allocation looks to be wider than the Uk, are we
expecting the UK 3 Khz allocation to remain as is, if and when the
band is formalised ?, in which case loosing 200 hz may not be the most
sensible option ...
As I understand it, there are not yet any formal Europe-wide proposals,
just
what individual regulators have allocated on a case-by-case basis. I think
G, EI, and ON have all allocated 501 - 504. The DL beacons and OK0EMW are
licenced to use spot frequencies around 505kHz. Gus SM6BHZ would be able
to
use 504.0 - 504.1kHz.
As by definition , if you can transmit wspr you must be able to move
transmit frequency (noting Andy's new beacon) establishing an over
lapping 100 hz section may be a reasonable compromise ie move the dial
frequency to say 502.5 or 499.5 , leaving 100 hz in band for uk access
--------------------------------------------------
From: "James Moritz" <[email protected]>
Sent: Monday, September 21, 2009 2:14 PM
To: <[email protected]>
Subject: LF: Re: US 500-kHz band plan
Dear LF Group,
I still haven't replied to Fritz Raab, W1FR, regarding the WD2XSH US
band
plan which he is apparently coordinating - you may remember I posted the
US
proposals, which he sent me, a couple of weeks ago, but have not
received
any comments from other UK/Eu stations. I think I should reply with
something, so now is your chance... The proposal relates to the US
allocation extending to 495 - 515kHz, and how that would fit in with
current
UK and Eu beacon operations. The content of the e-mail is below. The
issue
is that they would like to make a 501.0 - 501.2kHz WSPR sub-band, to fit
in
with the various other proposals. Various other types of beacon modes
are
allocated frequencies outside the UK/EI/ON 501 - 504kHz range, while
501.2 -
504kHz is allocated to "general comms". Retaining frequencies just below
504kHz would divide their "general comms" band in two
I don't think there is anything preventing us from doing this, it is
just
the inconvenience of turning the current band "upside-down". Let me know
what you think!
Cheers, Jim Moritz
73 de M0BMU
From W1FR:
Greetings:
Thanks for the comments on the band plan, passed
along to me by W1XP.
About a month ago, a modification to the WD2XSH
license was approved that adds stations and gives us
access to 495 - 510 kHz. Perhaps half of the 42 stations
will eventually get on the air. Because of NDBs, some
stations are limited to parts of this band and we will
have two calling frequencies and two beacon bands.
A draft of our new band plan follows. Of particular
interest is WSPR. As I see it, our options are:
(a) 501.0-501.2: Conveniently on one side of our comms
band. Will not overload WSPR receivers near 504 kHz.
Apparently in EU CW-beacon band.
(b) 503.8-504.0: Apparently same as what you guys are
using. Cuts our comms band in the middle. Nearby
stations may overload US receivers trying to hear EUs.
(c) 503.9-504.1: Same problems as above with cutting
comms band in two and overloading. Conveniently
straddles both G/ON/EI and Canadian bands.
Any further thoughts you may have will be
appreciated.
73, Fritz, W1FR
Frederick H. (Fritz) Raab, Ph.D.
GREEN MOUNTAIN RADIO RESEARCH COMPANY
77 Vermont Avenue, Fort Ethan Allen
Colchester, Vermont 05446 USA
Tel./Fax.: +1 (802) 655-9670 Home: +1 (802) 862-0997
E-mail: [email protected]
BASIC BAND PLAN for WD2XSH
f, kHz USE
495.0 - 495.1 QRSS, 1-Hz spacing, 40 stations
495.1 - 495.6 CW/PSK beacons midwest, 100-Hz spacing, 10 stations
495.6 - 499.0 Comms
497.5 Calling frequency
499.0 - 501.0 Reserved for heritage stations and special events
501.0 - 501.2 WSPR
501.2 - 505.0 Comms
505.0 - 505.2 DX window
505.2 - 508.5 Comms
507.5 Calling frequency
508.5 - 510.0 CW/PSK beacons east, south, west, Pacific, 50-Hz
spacing,
30
stations
510.0 - 511.0 WE2XGR beacons
511.0 - 515.0 WE2XGR SSB and wideband modes
OTHER IN-BAND SIGNALS
503.976 NEED LSB
505.0 NEED carrier
506.024 NEED USB
508.976 OF/FA LSB
510.0 OF/FA carrier
511.024 OF/FA USB
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