[App_rpt-users] Allstar node

[David McGough]

Hi,

I agree that surplus Motorola hardware is an excellent way to go, except
from a TX duty cycle standpoint. I've built a couple portable repeaters
using a pair of 888 radios now and they run very high duty cycle with no
issues at all--not even needing any forced air cooling. The chief downside
to the 888 radios is synthesizer noise, and they are NOISY! So, that is
one major limitation is building a high-performance repeater.  But, for a
local coverage or experimental unit, they're great!!

73, David KB4FXC



On Wed, 23 Sep 2015, Jeff Carrier wrote:

> Your best bet is some old motorola surplus.  The GM300, Maxtrac, SM50,
> CDM750's are great for link nodes or repeaters.  You can find them on ebay
> cheap.  I'm sure they'll have a much better duty cycle than the 888 also.
> All the pins you need to interface to your node are on the 16 pin accessory
> connector on the back.  The best bang for your buck might be an SM50 or
> GM300
> 
> On Wed, Sep 23, 2015 at 5:18 PM, <n8ohu at yahoo.com> wrote:
> 
> > Steve,
> >
> > That's because the BF-888 and similar models do not have those exact
> > connection points; most uses of those radios don't require the ability to
> > disable the built in bandpass filters and preemphasis or deemphasis, which
> > is actually handled entirely inside the radio firmware. I'm not certain
> > exactly what the OP is wanting to do beyond setting up the two different
> > modes on the same hardware, but if there is a desire to bridge between
> > them, I do know how to accomplish that part.
> >
> > Matthew Pitts
> > N8OHU
> >
> > ------------------------------
> > *From:* Steve Zingman <szingman at msgstor.com>
> > *To:* "app_rpt-users at ohnosec.org" <app_rpt-users at ohnosec.org>
> > *Sent:* Tuesday, September 22, 2015 1:59 PM
> > *Subject:* [App_rpt-users] Allstar node
> >
> > Those mods are about the same as lots of them on the net.
> > They still do not expose the discriminator or modulator.
> >
> > 73, Steve N4IRS
> >
> > > Maybe this link to Doug's slick modification might be helpful
> > > information with regard to the abilities of the BF888s
> >
> > > Warren, KD4Z
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