Date   

Re: Punk antenna

Bill Cromwell
 

Hi,

How about a mag-loop?

73,

Bill KU8H


Sent from my Galaxy S®III


-------- Original message --------
From: "Michael McEwen mcewenk5osa@... [4sqrp]" <4sqrp@...>
Date:05/25/2015 20:17 (GMT-05:00)
To: QRP-L Mailing List ,4sqrp@...
Subject: [4sqrp] Punk antenna

 

I have recently been given a neat 2 1/2 W crystal controlled transmitter (7.030 and 7.040 crystals).

My plan is to put together an ultraminimalist station.  Believe it or not, I have a Sony SW 7600 portable which receives CW really nicely. I have a tiny Whiterook Products MK-32 sideswiper key. And a 12V for the TX power. 

What I want is the simplest TX antenna that would work for this.  I could use my 40M dipole here at home, but I really want some smaller than that for taking the station to the park, picnics, etc.

The best idea I can up with is a hamstick, but I afraid that the efficiency will be so low as to simulate a dummy load.  Is there some kind of vertical other than a standard 1/4 wave I could use?  A full 1/4 wave vertical is a no-go.

I'd rather not use a tuner although I have a good one...I really would like this to be as simple as possible, just for grins...
_ _ ...   .. _ _ _

Doc K5OSA - QTH: EM04sr
ARRL  
4SQRP #801 - NAQCC #7625 - SKCC #10098
FISTS #17157 - OMISS #9886
LFSARC (Lawton/Fort Sill Amateur Radio Club)

Michael T McEwen
Lt Col, US Army, Ret

Cellular Phone:  580 919-9205
Residence:  580 529-3412


Punk antenna

Michael McEwen
 

I have recently been given a neat 2 1/2 W crystal controlled transmitter (7.030 and 7.040 crystals).

My plan is to put together an ultraminimalist station.  Believe it or not, I have a Sony SW 7600 portable which receives CW really nicely. I have a tiny Whiterook Products MK-32 sideswiper key. And a 12V for the TX power. 

What I want is the simplest TX antenna that would work for this.  I could use my 40M dipole here at home, but I really want some smaller than that for taking the station to the park, picnics, etc.

The best idea I can up with is a hamstick, but I afraid that the efficiency will be so low as to simulate a dummy load.  Is there some kind of vertical other than a standard 1/4 wave I could use?  A full 1/4 wave vertical is a no-go.

I'd rather not use a tuner although I have a good one...I really would like this to be as simple as possible, just for grins...
_ _ ...   .. _ _ _

Doc K5OSA - QTH: EM04sr
ARRL  
4SQRP #801 - NAQCC #7625 - SKCC #10098
FISTS #17157 - OMISS #9886
LFSARC (Lawton/Fort Sill Amateur Radio Club)

Michael T McEwen
Lt Col, US Army, Ret

Cellular Phone:  580 919-9205
Residence:  580 529-3412


MemCert

WA0ITP
 

Only 6 days left to submit your Membership Certificate entry.

After a flurry of activity, the entries have gone silent. Attached is another design to review and hopefully spark some interest, it's pretty plain and isn't intended as an entry. It may come up in portrait mode, but is intended as a landscape.

I did this one in Publisher, but many other Graphjics programs will work ok to, or there are online sites and free downloads available too.
Google "certificate maker" for lots of hits.

Entries are still needed, so pse jump on the bandwagon and send them to me on, or before, 1 June. Thank you.

-- 72 WAØITP I love this radio stuff. www.wa0itp.com wa0itp@wa0itp.com


NAQCC MWN

Scotty Long
 

Quick note NAQCC Midwest MWN Net 40m 7117 kHz Memorial Day evening at 9pm CDT 0200 UTC. Please listen up or down as the frequency may be busy at net time. Thank you veterans!!!! 

Sent from my iPad

73 Scotty Long NU0S
NAQCC MWN NCS
Net Manager-Coordinator 
Member 3715

Follow me on Twitter for live net updates and QRP in the field... @NU0Slong 


Antenna for MP

Michael McEwen
 

I am putting together my ALICE pack kit for MP operations.  Everything is coming together nicely and I am down to antenna choice(s).

When I am going to be sitting down for a while, I will put together the Alex Loop or string up the PAR EndFedz 40/20/10 (Trail  Friendly" version)...The Loop is a bit awkward for me to handle while hiking  (chronic back/neck problems).  The dipole is not realy practical when walking ;>}  I am more than happy to use one of my hamsticks...probably the 17M because that seems to be the best bet for avoiding contests.

Is there a better  alternative than the hamstick?  I have had an MP-1 and have borrowed a buddipole...both are a bit more complex than I want when hiking.  I thinking that a simple single band stick with dragging counterpoise will be my best alternative.  Am I missing something important?
_ _ ...   .. _ _ _
​ ​

Doc K5OSA - QTH: EM04sr
ARRL  
4SQRP #801 - NAQCC #7625 - SKCC #10098
FISTS #17157 - OMISS #9886
LFSARC (Lawton/Fort Sill Amateur Radio Club)

Michael T McEwen
Lt Col, US Army, Ret

Cellular Phone:  580 919-9205
Residence:  580 529-3412


Re: Certificate stuff

Johnny AC0BQ
 

Gm Ray
For those of us that are "graphic" challenged do we save the information in a word type doc and then add a border to fact it up?
Would it be better to just print the info on a pre made certificate from one of the office supply stores??
Thanks for your efforts, the form designer works super!
72
Johnny AC0BQ 


On Friday, May 22, 2015, Ray Cadmus rcadmus@... [4sqrp] <4sqrp@...> wrote:
 

I played a bit with pdf forms and didn't like the result. Could not
find a good way to vary font and color in the entry area.

Took a different approach - used a form to collect the data - then
stuffed that data into a standard page that I could control a bit
better. This approach could probably work for whatever cert is selected.

Anyway - try it...

http://108.243.157.56/4state/makecert.html

This is on my home test server.

Let me know what you think and how I can help.

Regards,

ray W0PFO



--
QRP....."more smiles per watt"
72
JOHNNY AC0BQ  ..


Re: Certificate stuff

Ray Cadmus
 

Hey folks - please note.  That certificate posting here was by mistake.  That one was just a sample, a work in process,  intended as proof of concept to Terry.  I didn't mean for it to go to the group.  The actual certificate has yet to be chosen by the directors.

On the other hand - maybe like the minting of a flawed coin it will turn out to be a collector's item :-)

Regards,

ray    W0PFO

--

On 05/23/2015 08:15 AM, Jack Mcduffie jackw8gpf@... [4sqrp] wrote:
 

I got mine! Thank you Ray!! 72/73,jack w8gpf,4sqrp#408..
--------------------------------------------
On Fri, 5/22/15, Dale Putnam daleputnam@... [4sqrp] <4sqrp@...> wrote:

Subject: RE: [4sqrp] Certificate stuff
To: "4sqrp@..." <4sqrp@...>
Date: Friday, May 22, 2015, 7:25 PM


























Great Job Ray!!!
Exactly what I was thinkin of.

Have a great day,
 
 
--... ...--
Dale - WC7S in Wy
 
 


To:
4sqrp@...
From: 4sqrp@...
Date: Fri, 22 May 2015 15:49:24 -0500
Subject: [4sqrp] Certificate stuff
















 









I played a bit with pdf forms and didn't like the
result. Could not

find a good way to vary font and color in the entry area.



Took a different approach - used a form to collect the data
- then

stuffed that data into a standard page that I could control
a bit

better. This approach could probably work for whatever cert
is selected.



Anyway - try it...



http://108.243.157.56/4state/makecert.html



This is on my home test server.



Let me know what you think and how I can help.



Regards,



ray W0PFO






































Re: Certificate stuff

Jack Mcduffie
 

I got mine! Thank you Ray!! 72/73,jack w8gpf,4sqrp#408..
--------------------------------------------

On Fri, 5/22/15, Dale Putnam daleputnam@hotmail.com [4sqrp] <4sqrp@yahoogroups.com> wrote:

Subject: RE: [4sqrp] Certificate stuff
To: "4sqrp@yahoogroups.com" <4sqrp@yahoogroups.com>
Date: Friday, May 22, 2015, 7:25 PM


























Great Job Ray!!!
Exactly what I was thinkin of.

Have a great day,
 
 
--... ...--
Dale - WC7S in Wy
 
 


To:
4sqrp@yahoogroups.com
From: 4sqrp@yahoogroups.com
Date: Fri, 22 May 2015 15:49:24 -0500
Subject: [4sqrp] Certificate stuff
















 









I played a bit with pdf forms and didn't like the
result. Could not

find a good way to vary font and color in the entry area.



Took a different approach - used a form to collect the data
- then

stuffed that data into a standard page that I could control
a bit

better. This approach could probably work for whatever cert
is selected.



Anyway - try it...



http://108.243.157.56/4state/makecert.html



This is on my home test server.



Let me know what you think and how I can help.



Regards,



ray W0PFO


Re: Would you accept constrained PSK31 operating procedures?

Michael McEwen
 

Fascinating concept...with my limited technical knowledge/skill, I'd like to try this...so far my PSK 31 efforts have been with my QRO rig at home station...it would be fun to put one of my laptops in my portable rig and try from a SOTA site...L'chaim...

_ _ ...   .. _ _ _

Doc K5OSA - QTH: EM04sr
ARRL  
4SQRP #801 - NAQCC #7625 - SKCC #10098
FISTS #17157 - OMISS #9886
LFSARC (Lawton/Fort Sill Amateur Radio Club)

Michael T McEwen
Lt Col, US Army, Ret

Cellular Phone:  580 919-9205
Residence:  580 529-3412


On Fri, May 22, 2015 at 3:53 PM, mbraner@... [4sqrp] <4sqrp@...> wrote:
 

A question to QRP PSK31 users and potential users:  I am trying to design a way to transmit PSK31 with simple CW-only QRP transceivers.  Besides the technical challenge of getting a good-enough signal quality that way, there is also a human-interface issue.  I wonder whether people would choose to use such a system, given the limitation described below.

In normal use (with SSB rigs) one can see multiple incoming signals in the "waterfall", click on the desired one, and then the software generates an outgoing signal at the same audio frequency as the chosen incoming one.  That way they end up on the exact same radio frequency.

My idea involves modulating the transmitter based on the envelope of the PSK31 signal output by the computer.  The audio frequency of that envelope is ignored.  That means that one would have to do without that nice feature of the PC software.  Instead, one would need to do something like this: find the signal you want to respond to, then tune the rig's radio frequency so as to place that signal on the waterfall at the same audio frequency as the (CW) rig's tx/rx offset.

For example, if the transceiver transmits 700 Hz above (or below) the "carrier" frequency during reception, then the incoming signal should be producing a 700 Hz beat relative to the BFO.  One can mark (via software or otherwise) that audio frequency on the waterfall to help with that tuning.  With some radios one can also see the outgoing carrier on the waterfall by hitting the (CW) key for a moment.  (Arranging a way to do that at low power, without actually transmitting, is an easy mod in some rigs.)  The tuning can be made more exact if the waterfall can be zoomed in to show a narrower range around that frequency than the typical 3 KHz band.  Some existing PSK31 software programs allow that, some don't.

OTOH if you are the one initiating the QSO (e.g. by calling CQ) and the other party (using a conventional SSB rig) replies right on your frequency, then all is good, you wouldn't have to do anything further to tune it.

This is not really different from the way we use the rigs for CW, where you tune the incoming signal to the same (or close to the same) audio pitch as the offset (and the sidetone, in the many rigs that generate the sidetone via beating with the BFO).

So, would you live with such limitations for the purpose of being able to use simple CW rigs (e.g., the SW40/SW30/SW20, the similar MFJ rigs, HW7/8/9, and so forth) for PSK31?

- Moshe, N1OVN




Re: Croatan National Forest outing

Michael McEwen
 

Will listen and hope many others will...probably not going to have much luck out here in SW Oklahoma, but one never knows what the propagation gods will provide...bon chance...

_ _ ...   .. _ _ _

Doc K5OSA - QTH: EM04sr
ARRL  
4SQRP #801 - NAQCC #7625 - SKCC #10098
FISTS #17157 - OMISS #9886
LFSARC (Lawton/Fort Sill Amateur Radio Club)

Michael T McEwen
Lt Col, US Army, Ret

Cellular Phone:  580 919-9205
Residence:  580 529-3412


On Fri, May 22, 2015 at 11:37 PM, KB4QQJ@... [4sqrp] <4sqrp@...> wrote:
 


Hello the Group,
I'll be operating from the Croatan National Forest and the Neuse River from Saturday till Tuesday.
I'll be using my MTR and KX3 powered by solar panels. Antennas will be LnR 10/20/40 and an endfed random wire fed through an UNUN. Keys will be the Minute Man mini key and a homebrew single lever paddle that doubles as a sideswiper. Keep an eye on the RBN, QRPSPOTS or the GORC spotter page. http://www.cwfun.org/funspots/gorc/
Hope to put a few new calls and countries in the log. I'll be operating from Craven, Pamlico and Carteret county if any of you are county hunters.

73 for now,
Randy_KB4QQJ




Re: Membership Certificate

Michael McEwen
 

WA0ITP: TNX for keeping this going...I really think it will help our visibility and will be fun for all...new and longer time members (was going to say, old members, but that may not be PC)  ;>}

_ _ ...   .. _ _ _

Doc K5OSA - QTH: EM04sr
ARRL  
4SQRP #801 - NAQCC #7625 - SKCC #10098
FISTS #17157 - OMISS #9886
LFSARC (Lawton/Fort Sill Amateur Radio Club)

Michael T McEwen
Lt Col, US Army, Ret

Cellular Phone:  580 919-9205
Residence:  580 529-3412


On Fri, May 22, 2015 at 9:15 AM, WA0ITP wa0itp@... [4sqrp] <4sqrp@...> wrote:
 

Only Nine days left until the end of the member cert is chosen. Please
send your creations to me, or as as an attachment to a post to the
Group. Put the word "certificate" or just "cert" in the subject line, so
my filter will grab it. I'll make a web of all entries, to present to
the board for voting.

It has been suggested that the winning cert be added to the web site as
an editable PDF document, so recipients could type their call and member
number into it on screen, and then it print out on their own printer.
Sounds like a great idea, does anyone have the ability to do that? Can
the winning pdf be imported into a pdf creator program, or must the
design be completely created within the program?

Coupla thngs to consider while you're designing:
They can be created in any program you wish, or even online pages. We'll
convert them to another format later if needed. The new logo should
appear sonewhere. If your design has a line or space for an official's
name, it should be Wayne Dillon's. Wayne, KC0PMH, is our membership
chairman. Also, actual signatures should be avoided, too easy to lift
and use them in this day and age of screen capture programs and identity
theft. Script fonts are probably ok.

We have four entries so far, keep 'em coming. We need more from which
to choose, the more the better. Anyone can submit one, and multiple
entries per individual are welcome. Multicolor, plain, fancy, with or
without graphics, all are welcome. The winner will receive many thanks
and great accolades form the Group..

Thanks vy much

--
72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@...



Croatan National Forest outing

kb4qqj
 


Hello the Group,
I'll be operating from the Croatan National Forest and the Neuse River from Saturday till Tuesday.
I'll be using my MTR and KX3 powered by solar panels. Antennas will be LnR 10/20/40 and an endfed random wire fed through an UNUN. Keys will be the Minute Man mini key and a homebrew single lever paddle that doubles as a sideswiper. Keep an eye on the RBN, QRPSPOTS or the GORC spotter page. http://www.cwfun.org/funspots/gorc/
Hope to put a few new calls and countries in the log. I'll be operating from Craven, Pamlico and Carteret county if any of you are county hunters.

73 for now,
Randy_KB4QQJ



Re: Certificate stuff

Dale Putnam
 

Great Job Ray!!!
Exactly what I was thinkin of.

Have a great day,
 
 
--... ...-- Dale - WC7S in Wy
 
 



To: 4sqrp@...
From: 4sqrp@...
Date: Fri, 22 May 2015 15:49:24 -0500
Subject: [4sqrp] Certificate stuff

 
I played a bit with pdf forms and didn't like the result. Could not
find a good way to vary font and color in the entry area.

Took a different approach - used a form to collect the data - then
stuffed that data into a standard page that I could control a bit
better. This approach could probably work for whatever cert is selected.

Anyway - try it...

http://108.243.157.56/4state/makecert.html

This is on my home test server.

Let me know what you think and how I can help.

Regards,

ray W0PFO



Re: Certificate stuff

Dale Putnam
 

Yep.. worked great..
I think it would be a "balanced look" to it ..
if another signature were to be on the left side,
... like Terry's... or  ??

Have a great day,
 
 
--... ...-- Dale - WC7S in Wy
 
 



To: 4sqrp@...; rcadmus@...
From: 4sqrp@...
Date: Fri, 22 May 2015 15:57:58 -0500
Subject: Re: [4sqrp] Certificate stuff

 
Fb Ray, it woiked!

Are you able to import a pdf into Acrobat and use your input form?  Or would you have to create the cert in Acrobat first?  Jon is taking a look at it too.  I'd bet that between you it will be a user friendly success.

Maybe webmaster Dave M has some thoughts too.

72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@...
On 5/22/2015 3:49 PM, Ray Cadmus rcadmus@... [4sqrp] wrote:

I played a bit with pdf forms and didn't like the result.  Could not
find a good way to vary font and color in the entry area.

Took a different approach - used a form to collect the data - then
stuffed that data into a standard page that I could control a bit
better.  This approach could probably work for whatever cert is selected.

Anyway - try it...

http://108.243.157.56/4state/makecert.html

This is on my home test server.

Let me know what you think and how I can help.

Regards,

ray    W0PFO



------------------------------------
Posted by: Ray Cadmus 
------------------------------------

4SQRP Website: http://4sqrp.com
Plan to attend OzarkCon on - April 1-2, 2016
View Details at http://www.ozarkcon.com/index.php
------------------------------------

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Version: 2015.0.5941 / Virus Database: 4347/9841 - Release Date: 05/22/15





Re: Would you accept constrained PSK31 operating procedures?

moshecontra
 

First, PSK31 is NOT a frequency-shift modulation scheme.  It is PHASE shift.  In the simple (and most commonly used) BPSK mode, the phase is simply flipped 180 degrees - the frequency stays exactly the same.  (There is another mode, QPSK which shifts 90 degrees, that has some advantages, but is rarely used AFAIK.)  But in addition to the phase flip, in order to eliminate wideband splatter, the envelope is modulated, so that ahead of the phase flip the amplitude decreases gradually to zero, then the phase flips, then the amplitude increases smoothly to full power again.  If the envelope has the ideal sinusoidal shape, an "idle" PSK31 signal (a string of many zero bits) is therefore mathematically identical to a "two-tone" signal, i.e., two carriers that are about 32 Hz apart, beating with each other.  That's why it sounds like a warble.  The phase flipping is easy to add to a CW transmitter.  The correct amplitude modulation is the harder part.

Second, I am looking for a way to do it all with simpler equipment, not more complicated!  No Arduino for me therefore...  :-)  I can simply use my SSB rig and any old PC, but still would like to be able to do it with a CW transceiver.


Re: Certificate stuff

David Wilcox K8WPE
 

Gee but that was easy.

Dave K8WPE 
Member #119



On May 22, 2015, at 4:49 PM, Ray Cadmus rcadmus@... [4sqrp] <4sqrp@...> wrote:

 

I played a bit with pdf forms and didn't like the result. Could not
find a good way to vary font and color in the entry area.

Took a different approach - used a form to collect the data - then
stuffed that data into a standard page that I could control a bit
better. This approach could probably work for whatever cert is selected.

Anyway - try it...

http://108.243.157.56/4state/makecert.html

This is on my home test server.

Let me know what you think and how I can help.

Regards,

ray W0PFO


Re: Would you accept constrained PSK31 operating procedures?

Don Wilhelm <w3fpr@...>
 

Moshe,

One of the presentations at FDIM revealed a "how to do that".
The concept is to replace the VFO or VXO with a DDS, then use an Ardrino (or Raspberry Pi) to drive the DDS frequency control lines.
With the right programming, you can do JT65, RTTY, PSK or any of the other data modes that use alternating audio pitch to create the signal.
To accomplish the same thing using audio tones, you would need an SSB transmitter.

73,
Don W3FPR

On 5/22/2015 4:53 PM, mbraner@... [4sqrp] wrote:
 

A question to QRP PSK31 users and potential users:  I am trying to design a way to transmit PSK31 with simple CW-only QRP transceivers.  Besides the technical challenge of getting a good-enough signal quality that way, there is also a human-interface issue.  I wonder whether people would choose to use such a system, given the limitation described below.

In normal use (with SSB rigs) one can see multiple incoming signals in the "waterfall", click on the desired one, and then the software generates an outgoing signal at the same audio frequency as the chosen incoming one.  That way they end up on the exact same radio frequency.

My idea involves modulating the transmitter based on the envelope of the PSK31 signal output by the computer.  The audio frequency of that envelope is ignored.  That means that one would have to do without that nice feature of the PC software.  Instead, one would need to do something like this: find the signal you want to respond to, then tune the rig's radio frequency so as to place that signal on the waterfall at the same audio frequency as the (CW) rig's tx/rx offset.

For example, if the transceiver transmits 700 Hz above (or below) the "carrier" frequency during reception, then the incoming signal should be producing a 700 Hz beat relative to the BFO.  One can mark (via software or otherwise) that audio frequency on the waterfall to help with that tuning.  With some radios one can also see the outgoing carrier on the waterfall by hitting the (CW) key for a moment.  (Arranging a way to do that at low power, without actually transmitting, is an easy mod in some rigs.)  The tuning can be made more exact if the waterfall can be zoomed in to show a narrower range around that frequency than the typical 3 KHz band.  Some existing PSK31 software programs allow that, some don't.

OTOH if you are the one initiating the QSO (e.g. by calling CQ) and the other party (using a conventional SSB rig) replies right on your frequency, then all is good, you wouldn't have to do anything further to tune it.

This is not really different from the way we use the rigs for CW, where you tune the incoming signal to the same (or close to the same) audio pitch as the offset (and the sidetone, in the many rigs that generate the sidetone via beating with the BFO).

So, would you live with such limitations for the purpose of being able to use simple CW rigs (e.g., the SW40/SW30/SW20, the similar MFJ rigs, HW7/8/9, and so forth) for PSK31?

- Moshe, N1OVN




Re: Certificate stuff

WA0ITP
 

Fb Ray, it woiked!

Are you able to import a pdf into Acrobat and use your input form?  Or would you have to create the cert in Acrobat first?  Jon is taking a look at it too.  I'd bet that between you it will be a user friendly success.

Maybe webmaster Dave M has some thoughts too.
72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@...
On 5/22/2015 3:49 PM, Ray Cadmus rcadmus@... [4sqrp] wrote:

I played a bit with pdf forms and didn't like the result.  Could not 
find a good way to vary font and color in the entry area.

Took a different approach - used a form to collect the data - then 
stuffed that data into a standard page that I could control a bit 
better.  This approach could probably work for whatever cert is selected.

Anyway - try it...

http://108.243.157.56/4state/makecert.html

This is on my home test server.

Let me know what you think and how I can help.

Regards,

ray    W0PFO



------------------------------------
Posted by: Ray Cadmus 
------------------------------------

4SQRP Website: http://4sqrp.com
Plan to attend OzarkCon on - April 1-2, 2016
View Details at http://www.ozarkcon.com/index.php
------------------------------------

Yahoo Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/4sqrp/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/4sqrp/join
    (Yahoo! ID required)

<*> To change settings via email:
    4sqrp-digest@... 
    4sqrp-fullfeatured@...

<*> To unsubscribe from this group, send an email to:
    4sqrp-unsubscribe@...

<*> Your use of Yahoo Groups is subject to:
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-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5941 / Virus Database: 4347/9841 - Release Date: 05/22/15




Would you accept constrained PSK31 operating procedures?

moshecontra
 

A question to QRP PSK31 users and potential users:  I am trying to design a way to transmit PSK31 with simple CW-only QRP transceivers.  Besides the technical challenge of getting a good-enough signal quality that way, there is also a human-interface issue.  I wonder whether people would choose to use such a system, given the limitation described below.

In normal use (with SSB rigs) one can see multiple incoming signals in the "waterfall", click on the desired one, and then the software generates an outgoing signal at the same audio frequency as the chosen incoming one.  That way they end up on the exact same radio frequency.

My idea involves modulating the transmitter based on the envelope of the PSK31 signal output by the computer.  The audio frequency of that envelope is ignored.  That means that one would have to do without that nice feature of the PC software.  Instead, one would need to do something like this: find the signal you want to respond to, then tune the rig's radio frequency so as to place that signal on the waterfall at the same audio frequency as the (CW) rig's tx/rx offset.

For example, if the transceiver transmits 700 Hz above (or below) the "carrier" frequency during reception, then the incoming signal should be producing a 700 Hz beat relative to the BFO.  One can mark (via software or otherwise) that audio frequency on the waterfall to help with that tuning.  With some radios one can also see the outgoing carrier on the waterfall by hitting the (CW) key for a moment.  (Arranging a way to do that at low power, without actually transmitting, is an easy mod in some rigs.)  The tuning can be made more exact if the waterfall can be zoomed in to show a narrower range around that frequency than the typical 3 KHz band.  Some existing PSK31 software programs allow that, some don't.

OTOH if you are the one initiating the QSO (e.g. by calling CQ) and the other party (using a conventional SSB rig) replies right on your frequency, then all is good, you wouldn't have to do anything further to tune it.

This is not really different from the way we use the rigs for CW, where you tune the incoming signal to the same (or close to the same) audio pitch as the offset (and the sidetone, in the many rigs that generate the sidetone via beating with the BFO).

So, would you live with such limitations for the purpose of being able to use simple CW rigs (e.g., the SW40/SW30/SW20, the similar MFJ rigs, HW7/8/9, and so forth) for PSK31?

- Moshe, N1OVN



Certificate stuff

Ray Cadmus
 

I played a bit with pdf forms and didn't like the result. Could not find a good way to vary font and color in the entry area.

Took a different approach - used a form to collect the data - then stuffed that data into a standard page that I could control a bit better. This approach could probably work for whatever cert is selected.

Anyway - try it...

http://108.243.157.56/4state/makecert.html

This is on my home test server.

Let me know what you think and how I can help.

Regards,

ray W0PFO

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