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Author Topic: PSK-31 frequencies??  (Read 2034 times)
WB0AXN
Member

Posts: 90




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« on: March 10, 2008, 02:26:07 PM »

When I installed Digipan, all the PSK frequencies were auto entered for each band.
Checking several web sites about using PSK-31, I notice the frequencies listed are different from Digipans.
Digipans freqs are:
3580
7070
14070

Web sites show the freqs as:
3580.15
7070.15
14.070.15
etc.....

So, which freqs are correct???  or does it make any difference which ones I use??

Roland
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KB9CRY
Member

Posts: 4283


WWW

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« Reply #1 on: March 10, 2008, 05:39:01 PM »

Do you think that you need to be so precise?

Where do you hear the PSK activity.

It doesn't matter; just get close.
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KF6IIU
Member

Posts: 0




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« Reply #2 on: March 11, 2008, 02:11:44 PM »

Don't worry, you will find signals spread out +- a khz or two on either side of the "published" frequencies, usually above. Maybe +2 khz if there is a CW or RTTY contest.

If you haven't been able to figure this out already, something is wrong with your receiver since 7070 is usually filled with signals 24x7, 14070 during daylight these days. Listen first and familiarize yourself with operating procedures before you start transmitting.
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WB0AXN
Member

Posts: 90




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« Reply #3 on: March 11, 2008, 04:41:09 PM »

Kf6iiu,
I've only had PSK31 installed for a few days...my first attempt at using a digital mode.
I kinda figured the frequency thing out and everything is okay now.
It will be quite awhile before I do any transmitting and make my first contact....I've been doing a lot of listening, so to speak.

Roland
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KE4DRN
Member

Posts: 3746




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« Reply #4 on: March 11, 2008, 06:24:39 PM »

hi roland,

take a look here, great video of real psk31 qso in action

http://kk7uq.com/html/download/Getting%20Started%20with%20Digipan.pdf

this article will help you setup (program) Digipan
fast and easy.

take a look at MMSSTV, similar to digipan but
for slow scan tv, no need for expensive hardware as in the past.

http://mmhamsoft.amateur-radio.ca/mmsstv/

73 james
 
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WB0AXN
Member

Posts: 90




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« Reply #5 on: March 11, 2008, 07:16:18 PM »

Hi James,

The article from KK7UQ is great!!  
It just so happens, he is a good friend of a ham friend of mine (K7RNZ) in Washington.  
Evidently, he was really involved with digital communications, etc.  and designed some interface circuits, I think.

Thanks for posting the helpful link!

btw, there were several stations on 7.070 tonight with strong signals.   Sure wish I could get an interface so I can start transmitting.

73,
Roland
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KE4DRN
Member

Posts: 3746




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« Reply #6 on: March 12, 2008, 05:13:38 PM »

Hi Roland,

take a look at this interface,
gets you on the air fast and easy.

http://www.geocities.com/n2uhc/interface.html

similar to the Rascal kit that I built and
also use the Signalink from tigertronics.

glad to help with the info, I've been hooked
on digital modes when I worked at our club fd
digital station, W4DW, several years ago.

73 james

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WB0AXN
Member

Posts: 90




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« Reply #7 on: March 13, 2008, 12:47:10 PM »

James. wrote:
take a look at this interface,
gets you on the air fast and easy.

http://www.geocities.com/n2uhc/interface.html

I like that, and will do what I need for sure.
This morning, I jury rigged a couple cables and wired up a mic plug for my Icom. Added a couple resistors in the mic line to reduce the signal.   Seems to work okay....will use it until I get the one you suggested built.
Thanks for the info and 73,
Roland
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