[ICOM] AFSK RTTY with PROIII

[Larry Gauthier (K8UT)]

Phil,

I successfully use the RIGblaster Plus in FSK RTTY mode with MMTTY under 
MMTTY stand-alone, N1MM Logger, and DX4Win. The configuration allows me to 
jump between SSB, CW, RTTY and PSK modes without making any jumper changes 
or flipping any switches on the RB+. BEST OF ALL, it allows me to run the 
wonderful Icom TPF RTTY filters on RTTY.

I initially followed the directions in the RIGblaster Plus manual - which 
did not work. Differences from the manual are noted below.

Here's my configuration:

RIGblaster
    External connections:
       front panel Mic to Icom microphone
       rear panel RJ-45 to Icom mic input
       rear panel AUDIO OUT to PC sound card
       rear panel KEY OUT to Icom ACC-1
       rear panel DB-9 to serial port on PC
   Internal connections:
       P1 connector as per "Icom jumper connections" in user manual
           input and output sides are mirror images of each other
           P1 -> mic
           P2,3,4 -> jumpered across
           P5 ->PTT
           P6 -> PTT GND
           P7 -> mic gnd
       P5 connector NOT as per instructions
           P9  - jumpered
           P10 - jumpered
           P11 - open
           P12 - open
           P13 - jumpered
  MMTTY configuration:
    <O>ptions <S>etup in the RTTY Control Panel:
     <Misc> tab: Tx Port = choose whether you are using soundcard AFSK or 
FSK
  NOTE - selecting FSK requires a separate FSK driver circuit (transistor) 
between your serial port and the rig

I have used this configuration with 4 models of Icoms: 746, 756Pro  II and 
III, and a 7800. Easy. Works Great.

= = = = =
UPDATE:
A year ago, I decided to eliminate West Mountain Radio's architecture that 
interrupts the microphone cable of the radio, and instead wire everything 
from the RB+ into the Icom rear panel ACC port. When doing this, I also 
grabbed the aux +12 volts from the Icom ACC port and eliminated the RB+ wall 
wart. This configuration gave me the same SSB, CW, FSK RTTY, and soundcard 
PSK modes, but with fewer cables and (IMHO) slightly cleaner operation. It 
required custom-building some cables and making modest changes to the RB+ 
circuit board, but it was worth it.  If you are interested in tackling 
something a little more difficult let me know and I'll send you these 
construction details.

-larry
K8UT
>
> --------------------------------------------------
> From: "Phil Krichbaum" <vailphil at sopris.net>
> Sent: Wednesday, January 06, 2010 1:32 PM
> To: "Icom" <icom at mailman.qth.net>
> Subject: [ICOM] AFSK RTTY with PROIII
>
>>    Maybe I missed it, but no where in the manual can I see how to use
>> the 350 Hz RTTY filter when using AFSK in LSB. Using the 1800 Hz filter
>> position plus the twin PBT it is reasonably OK down to about 900 Hz but
>> no narrower to receive RTTY effectively. Now if I could get the Rig
>> Blaster Plus to transmit FSK with N1MM and MMTY, I wouldn't have to
>> worry about this problem!
>>    Phil N0KE
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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>