[TenTec] Orion Interface Options

[Marsh Stewart]

Diagrams for simple switching transistor CW and FSK interfaces are in the
N1MM and WriteLog manuals. Also there is coverage of this on AA5AU's
excellent RTTY website:

http://www.aa5au.com/rtty/fsk-interface/

For audio from receiver to computer see:

http://www.aa5au.com/rtty/getting-started-on-rtty/page-03/



K9YC also has written on this in his in-depth article: 
http://www.k9yc.com/HamInterfacing.pdf

Audio interconnections start on page 7.


All that is needed for CW and FSK transmit are 3 inexpensive NPN general
purpose switching transistors (2N2222s work fine) and 3 1K resistors.

Even if you use a commercial interface this is good information on what is
going on "under the hood".

Marsh, KA5M



-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Martin Sole
(HS0ZED)
Sent: Saturday, March 14, 2015 10:15 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Orion Interface Options

For FSK I use a 3 transistor interface from a serial port to the Orion. 
One transistor is used for CW keying and the other for FSK, the third is 
the PTT transistor needed for FSK. I think the specifics were in the 
N1MM contest logging program documentation.

Use pretty pretty much any simple switching type transistors and a few 
other small parts, resistors and diodes. Too easy to not work.

Martin, HS0ZED


On 14/03/2015 21:49, Bill Gaines wrote:
> I have an Orion 565 and in addition to mostly operating CW I do use the
radio for RTTY using FSK. My question (in a minute) is not to generate a
debate on the pros and cons of RTTY using FSK or AFSK. I learned RTTY some
45 years ago on the old machines and was brought up on FSK so that is what I
wish to stay with. My debacle is this. For several years now I have had two
rather expensive interfaces that I have used (two of the same make and
model). The first one failed as a result of a nearby lightening strike and
the second just failed because (you fill in the blank). I am tired of
getting a second mortgage for a piece of equipment. What products in use
seem to be most popular? I do want something that will allow mw to use CW
and RTTY. I am not interested in the other various digital modes at this
time although I would guess that they all do most of the same things. Maybe
I will need a second mortgage after all.
>
> Thanks in advance,
>
> Bill AD8P
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>


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