[aprssig] APRS Voice Alert

[Robert Bruninga]

That's what I meant.  THe main component of a 
full rectified power supply is twice the AC frequency.

>>> dave at emv.co.uk 09/10/05 5:04 PM >>>
Bob..
 
"50Hz hum" won't trigger a 100Hz CTCSS system.  Significant PSU ripple (100Hz) may.
 
Sorry, but had to get that in :)
 
Dave B. G0WBX.

________________________________

From: aprssig-bounces at lists.tapr.org on behalf of Robert Bruninga
Sent: Sat 10/09/2005 21:29
To: agara at kantauri.com; aprssig at lists.tapr.org 
Subject: Re: [aprssig] APRS Voice Alert



Asier,

Using 100 HZ tone in europe, do you hear many
squelch mistakes due to 50 Hz hum on some systems?

Bob

>>> agara at kantauri.com 09/10/05 3:28 PM >>>
Hi,
I'm Asier, EB2FGI from Spain.
Usually, when I'm in mobile I use Voice Alert  (I think I'm the unique
ham in Europe using Alert Voice because never I contacted  an other ham
with this system, but I continue trying ...) and I use 100.0 tone.

Asier, EB2FGI

Robert Bruninga wrote:

>One problem with Voice Alert in Europe is
>that I'm not sure what tone they use.
>
>We use 100 Hz here in the USA, but since
>many of the AC Power Grid in Europe is
>at 50 Hz, this make PL 100 practically useless
>in Europe.  I have seen references to maybe
>136.5 Hz, but then I have also made the mistake
>of writing 123 Hz sometimes.  And of course,
>unless everyone uses the same tone on the
>same continent, then it really doesn't work
>for its intended purpose.
>
>So, if anyone on this list uses APRS Voice
>Alert in Europe, tell us what tone they use.
>thanks
>
>
>Bob
>
>
>
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