Thanks for the reply Don,
Here is where I am, the radio PTT works when the appropriate lead is
shorted to ground, then additional short to ground
gives me the shift. The radio is working as is the cable to the interface.
EXTFSK is set for LPT1,
It's late, I know I'll get into deep you know what if I continue. I'm
going to take my 'scope and see what's
going on. There are 2 sets of the same simple transistor switch that I
found. In one, the one
I used there's a 3.3 k to the switching transistor. In another a 1k was
used. Now I know this is a stretch
but maybe ...
Anyway, something between the computer LPT1 and the radio ain't right. I
found the ground
in the wrong spot, but it doesn't key on at all after I fixed that ..
Arghhh
Thanks for the advice and encouragement, I'll keep you posted
ed
On 12/13/2010 9:53 PM, Don Hill AA5AU wrote:
> Ed, I'm curious as to why you are trying to key FSK on a parallel port and
> why you aren't using the Rigblaster Plus for FSK?
>
> Check to make sure the radio is set up for high tones (2125/2295) 170 Hz
> (these are the default settings) in menu 6-2.
>
> There's a simple test you can do to see if the radio is shifting FSK OK.
> Disconnect the line from your FSK interface but leave it
> connected to the RTTY jack on the radio. Key the radio into a dummy load
> with the monitor on and you should hear a steady MARK (or
> SPACE) tone (2125 or 2295 Hz). With the radio keyed, short the FSK input of
> the radio to ground. The tone you hear should shift
> 170 Hz either higher or lower depending how the FSK polarity (menu 6-1) is
> set in the radio. If an open sends a 2125 Mark tone,
> then shorting should send a 2295 Hz Space tone or vice versa.
>
> If this works, then there's something going on with your interface. Almost
> sounds like if you are using the parallel port, then
> maybe you are using the wrong pin. FSK comes from D0 pin 2 on a parallel
> port I believe (see http://www.g4zfe.com/rtty.html) Not
> too many people use parallel ports to key FSK.
>
> It may be easier to use the Rigblaster Plus for FSK.
>
> 73, Don AA5AU
> http://www.aa5au.com
> http://www.rttycontesting.com
>
> -----Original Message-----
> From: rtty-bounces@contesting.com [mailto:rtty-bounces@contesting.com] On
> Behalf Of Edwin Karl
> Sent: Monday, December 13, 2010 9:39 PM
> To: Iain MacDonnell - N6ML
> Cc: RTTY@contesting.com
> Subject: Re: [RTTY] Interface Problems
>
> Yes, That's the issue, using the FSK input (RTTY). I use the packet input for
> FSK, so
>
> On 12/13/2010 9:27 PM, Iain MacDonnell - N6ML wrote:
>> Hi Ed,
>>
>> Not sure what you mean by "a siren like tone" .. could it be that the
>> tone (pitch) that the MP is using is just higher than you're
>> accustomed to?
>>
>> I'm not sure that you can change that on the MP, although I've never
>> used one for RTTY.
>>
>> 73,
>>
>> ~Iain / N6ML
>>
>>
>> On Tue, Dec 14, 2010 at 3:03 AM, Edwin Karl<edk0kl@centurytel.net> wrote:
>>> Hi folks,
>>>
>>> I'm a neophyte when it comes to FSK. Been using AFSK for some time
>>> and tried to make the switch to FSK, what a problem.
>>>
>>> Equipment:
>>> FT-1000MP MKV, Dell D400 Laptop
>>> Rigblaster plus, not for FSK only AFSK, home made interface for FSK,
>>> (2 transistors feeding PTT, Shift and ground on back of radio).
>>> The PTT works fine, the AFSK works fine using Com 1. FSK keys but a
>>> siren like tone comes out not at all the "blety-beep" of RTTY.
>>> Software MMTTY for AFSK, Also using MMTTY on FSK using parallel port,
>>> EXTFSK and DLPORTIO
>>>
>>> What am I doing wrong? Assuming you can decipher what I'm trying to say ...
>>>
>>> Thanks
>>>
>>> ed K0KL
>>> _______________________________________________
>>> RTTY mailing list
>>> RTTY@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rtty
>>>
>>
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>>
>>
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