[drats_users] Correctly configuring D-Rats to talk to myself

[Mark Phillips]

Mike,

91AD's are famous for their crap data output. We suffer the same issue
in the GMSK adapter world hence the 1Meg resistor across the charge
pump.

My guess is that it'll cost you more to fix than you paid for it.

Mark 

On Sat, 2009-08-08 at 12:39 -0500, Michael A. Waldron wrote:
> Just thought I'd update the group and close this issue for future searchers. 
> 
> After extensive testing using a 2820, 800, 91, and a 92, I've concluded that my 91 is just plain broken.
> 
> Everything else talks to each other, the 91 just doesn't do slow speed data. Every packet it sends is corrupted. I suspect that the voice packets are probably not quite right either but the forward error correction that gets applied to the voice side makes them work. 
> 
> I suppose that's what I get for $200 at a hamfest, I shouldn't complain. I'm wondering if it's worth sending it in to be looked at. I may try swapping the UT-121 unit with someone elses to see if that is the problem or if it's elsewhere.
> 
> -Mike
> 
> Dan Smith wrote:
> >> The 91 seems to get lots of errors. It can't successfully transfer a
> >> message to the 2820 before it times out (Same PC/Serial/Location as
> >> 92).
> > 
> > The 91 is identical to the 92 in every related respect.  There is no
> > tuning you need to do to a working 92 setup for a 91.
> > 
> >> I see it's text in the sniff/raw display on the 2820 PC, and it's
> >> readable but garbled.
> > 
> > This means it's either being corrupted at the radio or over the air.
> > 
> > I would suggest checking your 91's cable, its power save setting, and
> > its battery or power supply.  A 91's cable, without a choke, is a good
> > place to get RF into the link which can cause problems.
> > 
> 
> 
-- 



Mark Phillips, G7LTT/NI2O
Randolph, NJ