I had an Omni VI Plus. You need to key PTT (I used a switching transistor
interface) and then "key" the FSK line for mark/space. All you need for the
FSK interface is a 1K ohm 1/2 watt resistor in series.
Please see http://www.aa5au.com/rttyinterface.html
Marsh Stewart, KA5M
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of David W LeJeune, Sr
Sent: Monday, July 28, 2008 7:43 PM
To: 'Discussion of Ten-Tec Equipment'
Subject: Re: [TenTec] Omni VI with MMTTY....
Hi, Lou
Have an Orion II that I use with FSK, and on it you do have to key
the PTT which gives you carrier, and then the FSK provides the FSK keying.
Dave
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Louis Ciotti
Sent: Monday, July 28, 2008 7:32 PM
To: 'Discussion of Ten-Tec Equipment'
Subject: [TenTec] Omni VI with MMTTY....
I am trying to hook up my omni VI to use MMTTY.
Made up an interface like this:
DB9 | Omni VI
---------------------------------------------------------------------------
Pin 3 ---- >|Diode --- ---3.3K resistor ----- Mark/Space center pin
|
|
1.8K
|
Pin 5 --------------------------------------|--- Mark/Space Shield
I measured the output on the Mark/Space center pin when I try and TX on
MMTTY... I get A Square wave output from 0- ~5.5v at the RCA connector, but
the OMNI VI does not transmit anything...
Am I missing something?? And yes the radio is in FSK mode...
Do I need a PTT line?
Thanks,
Lou
KC2RVD
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