[drats_users] 91AD issues

[Gene Coldwell]

I've used a 91-AD with D-Rats with good result. However, I had to connect an external antenna to the HT. My home-made serial cable, 6 feet long did not get the radio RF and the computer far enough apart to make things work well. The radio transmitter could confuse the serial port. But with a mag-mount antenna 10 ft away, all was well.

Just my 2 cents.

On Fri, 01 May 2009 18:33:21 -0600
Nate Duehr <nate at natetech.com> wrote:

> Arnold Harding wrote:
> > I'm having problems getting my IC-91AD to talk D-RATS.  Actually it does 
> > communicate with simple Ping and some chat messages, but no file 
> > exchanges at all.  It doesn't seem to matter if I'm trying to go through 
> > a repeater, or simplex, I get just about the same problems.  I can use 
> > the repeater easily with 5 watts with my 2820, and when the 91AD is 
> > using the same antenna and high power, it really isn't happy communicating.
> 
> When you say "isn't happy", can you be more specific?
> 
> Is it not transmitting (a sign that the wimpier front-end on that HT 
> receiver might be being overloaded and tricked into keeping the HT off 
> the air because it sees the channels as "busy"), or is it a higher 
> bit-error rate issue?
> 
> (I find that the reason Icom seems to have included the "Attenuator" 
> feature is to alleviate the first problem above... crank up the 
> attenuator on the ID800H or the IC91/92AD to knock down the 
> intermod/noise the receivers are "hearing".)
> 
> When you compare 5W on the 2820 to the HT, is the HT on the same antenna?
> 
> > I attached screen captures of the 91AD Digital and Common settings in 
> > hope that someone sees what I have been unable to see.
> 
> I didn't look through ALL of them, but a quick skim didn't see anything 
> grossly misconfigured.
> 
> Nate WY0X
> 
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-- 
Gene Coldwell <coldwell at csptexas.com>