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PA2AGA > HDDIG 20.07.00 06:14l 211 Lines 6794 Bytes #-9385 (0) @ EU
BID : HD_2000_194D
Read: GUEST
Subj: HamDigitalDigest 2000/194D
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Sent: 000719/1412Z @:PI8HGL.#ZH1.NLD.EU #:62416 [Den Haag] FBB $:HD_2000_194D
From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Wed, 19 Jul 00 14:26:39 MET
Message-Id: <hd_2000_194D>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
SSB (in fact, to a very good approximation I don't use SSB at all) so my
radio's VOX sensitivity doesn't have to be juggled to suit both modes. You
do need to remember to mute the sound card's line input in the settings for
the output level. Remember as well to turn off your Windows sounds so you
don't send them out over the air.
Some PSK programs (e.g. PSKGNR, Logger) can use a serial port interfaced to
the radio for radio control purposes to handle the PTT chores. This seems
like an elegant solution to me, but it's not available in all PSK31
programs.
WM2U has some great information on interfacing for PSK at his web site
(www.qsl.net/wm2u/interface.html), which is also accessible from
www.psk31.com . There is also a page at the www.psk31.com website called
PCErrata, which describes some of the other interfacing problems you might
run into.
I hope this answers some of your questions.
73, Rich
VE3IAY
------------------------------
Date: Tue, 18 Jul 2000 22:08:33 -0400
From: "Bob Lewis" <rlewis@staffnet.com>
Subject: Help with PSK-31
I think he's talking about multiple sets of signals on his receive
display which means the distortion must be in his receiver or sound
card (unless of course everyone he has copied is over driving).
------------------------------
Date: Wed, 19 Jul 2000 01:46:14 GMT
From: "George , W5YR" <w5yr@att.net>
Subject: Help with PSK-31
Many soundcards are notoriously easy to overdrive and then they distort
like mad. Perhaps what you are seeing is the result of distortion in your
soundcard - if so, your interface has nothing to do with what you see.
Try running your soundcard at the lowest possible output level. Check the
waveform with a scope with the program in IDLE. You should see a
sinusoidal two-tone pattern on the audio. Check your r-f output envelope
- should be the same two-tone. Any clipping, flat-topping or other
distortion is quickly seen on the scope. If your soundcard is "Economy
Class" to borrow an airline term, you might need to invest in a better
one
72/73, George W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE Dallas in Collin county QRP-L 1373
Amateur Radio W5YR, in the 54th year and it just keeps getting better!
R/C since 1964 - AMA 98452 RVing since 1972 Kachina #91900556
(12/99)
"Virgil Chambers, KU4TP" wrote:
>
> Hi all! Here's my problem:
>
> I have built several interfaces so far - I am using Digipan and a Toshiba
> 2595CDT laptop. Recieving is OK but I have noticed multiple 'railroad
> tracks' of the same QSO. Thinking it was an interface issue I have built
> several , improving each as I go - or at least trying to. I have yet to
> have a successful contact - but I am putting out audio as evidenced by my
> power meter. So my questions are -
>
> 1. What might be the cause of the "multiple QSO reception"? they seem to be
> spread about 200hz or so apart and at lower strength as you go out from a
> "center" signal.
>
> 2. I can understand not getting a contact if I'm not on freq. , but I must
> wonder if I am putting out a signal at a the appropriate frequency. I have
> called CQ a few times and I seem to get a reply slightly to the side of the
> selected freq. Any idea as to the cause of this?
>
> 3. Any other info would be gladdly accepted.
>
> Thanks!!!
>
> 73 de Virgil, KU4TP
------------------------------
Date: 19 Jul 2000 03:02:23 GMT
From: ebruchac@aol.comnojunkma (Ed Bruchac )
Subject: Help with PSK-31
>s and I seem to get a reply slightly to the side of the
>selected freq. Any idea as to the cause of this?
What radio are you using--older tubers and hybrids will drift,and w/1 hz
tuning,this can cause a major problem....
And check your sound card settings,on both TX and RX and level them up to
where
you are recieving copy when you click on a signal,and,putting out rf.
Also,make sure you don't have the squelch threshold set too high.
Finally,using Digipan,the AFC should be clicked on,(and the SNAP helps tune in
signals as well).
The HELP files should cover most of this.
See you on PSK910/15/17M)
Ed N4ZUM
"I believe in equality for everyone, except reporters and photographers."
Gandhi
------------------------------
Date: Wed, 19 Jul 2000 10:46:29 GMT
From: hamish@cloud.net.au (Hamish Moffatt VK3SB)
Subject: Help with PSK-31
6Plus Activity Club <simplyinfo@sc.rr.com> wrote:
> I would suggest a RigBlaster. It is the best thing I did for my ability
> to make PSK QSO's. Address is http://www.westmountainradio.com/
No offense intended, but the RigBlaster is the ultimate demonstration
of an appliance operator.
The interface I built for my radio consists of two small transformers,
a diode, 4N25 optocoupler, a pot and a couple of resistors. Not rocket
science.
73,
Hamish
--
Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>
------------------------------
Date: Wed, 19 Jul 2000 10:44:59 GMT
From: hamish@cloud.net.au (Hamish Moffatt VK3SB)
Subject: Help with PSK-31
Virgil Chambers, KU4TP <ku4tp@mindspring.com> wrote:
> 1. What might be the cause of the "multiple QSO reception"? they seem to be
> spread about 200hz or so apart and at lower strength as you go out from a
> "center" signal.
Too much audio from your sound card into the transmitter. If your rig
has an ALC meter for this purpose, use it. You don't want any ALC when
working PSK31 (which requires a linear transmitter).
> 2. I can understand not getting a contact if I'm not on freq. , but I must
> wonder if I am putting out a signal at a the appropriate frequency. I have
> called CQ a few times and I seem to get a reply slightly to the side of the
> selected freq. Any idea as to the cause of this?
Perhaps your transceiver has an offset between transmit and receive?
Could be quite likely if it is old.
73,
Hamish
--
Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>
------------------------------
Date: Wed, 19 Jul 2000 06:04:11 GMT
From: bugparts@hotmail.com
Subject: Hunters, Shooters README ! 7749
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------------------------------
End of Ham-Digital Digest V2000 #194
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