Weatherfax Frequencies

CPD

CPD

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I have the kit, set up and ready to receive weatherfax. BUT, what frequency do I actually tune to, and why are there two frequencies (ie one in brackets) quoted ?? Please help /forums/images/graemlins/frown.gif

Broadcast schedule and frequencies for Northwood (GYA), England.
GYA Frequencies Broadscast Type Times in UTC/GMT
2618.5 (2616.6) kHz*
4610 (4608.1) kHz
8040 (8038.1) kHz
11086.5 (11084.6) kHz
18261 (18259.1) kHz* Surface Analysis 0300, 0400, 0500, 0900, 1100, 1200, 1500, 1800, 2100, 2300.
Surface prog T24 0524, 0800, 1000, 1300, 1736, 2200.
Wind 0812, 2112
Fronts Centres 0848, 0912, 1124, 1136, 1400, 1600, 1700, 2000, 2012, 2024, 2036,
Gale Summary 0348, 0600, 0700, 1148, 1548, 1900,
Sea Swell 0924, 1912,

Many thanks all
 
The bracketed figures refer to the offset frequency that you may need to tune down to to get the best reception. Some software will do this automatically. Hope that helps.
 
Thanks for that Robavery. I have a very simple system with no auto-tune, so I guess I may have to wait for the broadcast times then manually tune (then set a pre-set) to get the best signal, which I guess may then change depending upon exact location, etc etc. Thanks for your comments.
 
What software are you using ?

Most will show a spectrum with two peaks of activity which you line up to get best results.

But starting with the lower frequency is likely to be the best start.

You will of course hear the signal on either frequency, but the pitch of the sound will change as you tune up and down.
 
I am using hffax on a small palm machine. The equipment is very basic but is known to work. Well, if yuo can tune the radio correctly that is !
 
Maybe in your software there is a "soundbyte" that mimics the correct audio for fax,navtex,telex etc.(to let you hear what it should sound like) It is easy to tune once you know what to listen for. If your receiver has a "clarifier" knob, you won't be able to tune to the accuracy (0.6 KHz etc.) that you quote on your initial entry by looking at the receiver's panel, you will have to do it by ear or a displayed spectrum. I use an old version of MetscanMeteo Pro on a laptop and a kenwood ham rig - perros cohones.(spanish dictionary?)
VERY important is the aerial -especially in elecrtically noisy places like marinas, and with a 'basic' receiver. you need to get above the crap. all well worth it when a clean fax comes in and there ain't too many onions out west.
 
You receiver must be capable of receiving USB.

Set it to the bracketed frequency which is 1.9kc/s below the listed frequency and then tune in on the spectrum as best you can.

Fax transmission always sounds to me to resemble the old fashioned revolving drum that used to be how faxes were sent.

The spectrum typically shows a bar at the left end to align with the sync pulse and one at the right end which matches the full white of the spectrum.

The lower 2 frequencies are likely to be your best bet if you are in the UK.
 
Re: Weatherfax Frequencies in Kc/s

I've not seen Kc/s mentioned for years, more descriptive than Hertz tho (or KHz that is).

For new readers - they are the same thing. /forums/images/graemlins/smile.gif
 
Re: Weatherfax Frequencies in Kc/s

Yeah

Thats me - past it - over the hill - sell by date long gone

Thanks for reminding me.

I still use inches and pounds and things

Gave up the rods, poles and perches though.
 
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