[pskmail] Re: vhf/uhf relays
- From: Steven Heimann <steven@xxxxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Wed, 30 Jun 2010 14:32:25 +1000
Hi John
It would be nice if the modes used by PSKMail were configurable rather
than being hard coded in. In cases like this where FM will be used the
server could limit the modes to ones useful for FM. Also, as the
channel bandwidth is fixed modes wider the 500Hz could be selected which
could increase speed.
Just a thought.
Regards
Steven
On Tue, 2010-06-29 at 15:49 +1000, John Douyere wrote:
> Hi Brett,
>
> Pskmail works well over VHF/UHF over FM and I tested this myself.
>
> I just don't know of a permanent server on V/UHF FM but there are no
> reasons not to have one.
>
> A point I noted in my tests: as described in QST a year or so ago, the
> FSK modes (THOR8 and 22, MFSK16 and 32 as used in Pskmail) provide a
> surprising sensitivity in FM, close to the sensitivity under ssb.
>
> This means that exact frequency alignment is not necessary (which can
> be a problem in ssb on VHF and especially in UHF) and this should
> allow Pskmail traffic to go through repeaters quite well too.
>
> Hope this helps,
>
> 73, John
>
> On Tue, Jun 29, 2010 at 3:23 PM, <pskmail@xxxxxxxxx> wrote:
> > Greeting-
> >
> > First let me say if I am asking too many questions on the list I am sorry.
> > I am
> > just trying to get up to speed as fast as I can.
> >
> > I see a pulldown choice for vhf/uhf relays. Does this mean folks are
> > running
> > pskmail on VHF/UHF? If one is using an FM radio there is of course no
> > bandwidth
> > savings, but I do see how it could be useful for local emergency
> > communications.
> >
> > Are the VHF/UHF relays standard pskmail servers running on VHF/UHF FM? If
> > so
> > would it be any use to the PSKMAIL community to have a system on VHF FM in
> > New
> > York City? I have plenty of 2 meter FM gear sitting around and my VHF
> > simplex
> > range is about 30 miles.
> >
> > 73
> >
> > -Brett
> > wa3yre
> >
> >
>
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