[arm-allstar] half duplex node linking to a repeater

[David McGough]

You're going to need to setup your own, private, full duplex repeater to 
accomplish what you're wanting to do....This is actually simpler than it 
sounds---all you need are two BF-888 radios. If you're only needing 
very short range (a few hundred feet), the transmit 888 can run into a 
"leaky" dummy load; the receive 888 going to the included whip antenna.

If you're needing more range, use a inexpensive notch-only duplexer; then 
you can use a base-station or mobile antenna, etc.

This is a no-frills setup, but, it does eliminate the half-duplex node
issue where it is keyed and therefore can't hear.  And, it works--I've got 
several of these setups, using various radios. I'm building another right 
now using BF-888's, a notch-only duplexer and a small Aluminum case.


73, David KB4FXC





On Sat, 18 Jul 2015, Sione Ragle wrote:

> This is correct, using half duplex node is like using a HT talking to a 
> repeater. This is how I link my repeater using a remote base to other 
> people's repeater. The draw back about this is I don't have control of 
> other people's repeaters to make their hang time short.
> 
> On 7/18/2015 6:45 AM, kk6ecm wrote:
> > My understanding is that simplex mode is when the tx and rx frequencies are the same. Half duplex uses different frequencies for each, but not transmitting and receiving at the same time. E.g. Your HT talking to a repeater.
> >
> > What is not clear to me is how to setup the hang times for the half duplex when linked to full duplex repeater? Should it be very short?
> >
> > Thanks,
> > Bob
> > kk6ecm
> >
> > Sent from iPad
> >
> >
> >
> 
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