On Sep 5, 2008, at 1:30 AM, Logan Zintsmaster wrote:
I hope the group will pardon me while I engage in a bit of RTTY
heresy.
When you use a PC sound card for decoding RTTY, the center frequency
is no
longer important, just the tone spacings. With MTTY, I can pick any
center
Logan,
What you say is true and quite workable *except* for the times when
there is a strong undesired signal inside the IF passband. That strong
signal takes over the AGC and reduces the receive gain causing all
signals (including your desired signal) to become weaker.
The solution is to
I've decided to take the plunge into digital modes and 'found' the RTTY mode
(and extra set of filters) in the SEC menu. There is still much about my 1
year old K2 that I'm still finding out. What a radio!
When I went in to set the filters in RTTY mode and decided to check the SSB
filters as
Subject: Re: [Elecraft] K2 RTTY
I've decided to take the plunge into digital modes and 'found' the RTTY mode
(and extra set of filters) in the SEC menu. There is still much about my 1
year old K2 that I'm still finding out. What a radio!
When I went in to set the filters in RTTY mode
DW,
It is an item in the Secondary menu. Tap DISPLAY to toggle between
primary and Secondary.
Remember to set RTTY FL1 almost the same as SSB FL1 because the transmit
path always uses the OP1 filter, so the BFO frequencies should be set
for that filter.
73,
Don W3FPR
DW Holtman wrote:
David
The biggest problem with data modes on the K2 is getting the audio signal
in and out. Several people have suggested points in the K2 where you can tap
or inject signals. (see: the PSK section in General Modifications of
LA3ZA Unofficial Guide to Elecraft K2 Modifications
Just for giggles, I connected the headphone jack of the K2 to the input
of an external soundcard that I picked up yesterday. I have been able
to receive RTTY and PSK.
I was just curious, what all I need to do to transmit? I understand I
need PTT and get audio on the mic connector. If I
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David Wilburn wrote:
I was planning on waiting till next year when the K3 gets here to play
with RTTY, but after seeing all the activity this past weekend I am
getting the itch. So I am trying to understand what I need to do to get
the K2 on
JT,
There is nothing wrong with AFSK - in fact, if the carrier balance on
the KSB2 board is adjusted correctly, AFSK is indistinguishable from FSK.
The only 'problem' with the K2 is that the BFO range is limited, with
the result that narrow filters cannot be set with a center frequency
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