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Author Topic: How can I hear my transmitted signal?  (Read 2869 times)
KR4TH
Member

Posts: 47




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« on: December 18, 2012, 05:38:02 PM »

Is there a way that I listen to the quality and strength of my cw signal other than another ham recording it and playing it back to me?  With so much technology I figured they may be another option.

Jerry
 

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WB6BYU
Member

Posts: 13585




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« Reply #1 on: December 18, 2012, 05:53:39 PM »

There are some remote receivers that you can access via the internet.  That way
you can listen to it yourself at a distance.

You can hear it yourself with a separate receiver if you reduce the sensitivity (often
shorting the input and reducing the RF gain) or build a small monitor receiver for that
purpose.

If you just want to listen to the timing of your keying but aren't concerned about
chirp, drift, etc., then you can use an RF-powered keying monitor, where the presence
of RF turns on an audio oscillator.
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W1VT
Member

Posts: 904




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« Reply #2 on: December 18, 2012, 06:09:31 PM »

http://homepage.ntlworld.com/lapthorn/pixie.htm

The Pixie is a very simple receiver that can be used to listen to your signal.  You can get crystals for the QRP frequencies much cheaper than having custom crystals made for you.  I'd suggest you run it off a battery and put it in a metal box--to avoid issues that crop up when you power a DC receiver off an AC power supply--you can get some interesting artifacts.

Zack Lau W1VT
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VA7CPC
Member

Posts: 2414




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« Reply #3 on: December 18, 2012, 06:18:42 PM »

I'd just borrow a receiver, stick 1" of wire in the antenna socket, turn on the attenuator, turn down the RF/IF Gain, and tune it to my transmitting frequency.

Forgive a dumb question:

. . . What are you afraid of?  And what are you hoping to find?

CW is a pretty simple mode.  If you're running a commercial transceiver, it's pretty reliable.  A few rigs have problems with keyclicks, but aside from that, most CW signals sound perfect over the air.

If your rig doesn't generate a CW sidetone, that's a different problem.  But just about _every_ rig generates a CW sidetone.

.             Charles
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KR4TH
Member

Posts: 47




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« Reply #4 on: December 18, 2012, 06:56:38 PM »

I would like to hear my signal on a remote site, but cant find a web site.  I have hear of them and would appreciate an address

I want to hear the difference in the sound at different power levels: 100 watts, 50 watts, 25 watts and 10 watts

Jerry
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VA3GUY
Member

Posts: 200




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« Reply #5 on: December 18, 2012, 08:44:53 PM »

http://www.w4ax.com/
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KA4POL
Member

Posts: 2128




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« Reply #6 on: December 18, 2012, 09:44:38 PM »

Make your choice: http://www.websdr.org/
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M6GOM
Member

Posts: 1014




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« Reply #7 on: December 19, 2012, 06:00:22 AM »

Is there a way that I listen to the quality and strength of my cw signal other than another ham recording it and playing it back to me?  With so much technology I figured they may be another option.


Another for www.websdr.org
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KR4TH
Member

Posts: 47




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« Reply #8 on: December 19, 2012, 06:25:06 AM »

thank you so much, those web sites were exactly what I was looking for,

I am amazed at the valuable knowledge and help that come from the eham forms.
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G4AON
Member

Posts: 545




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« Reply #9 on: December 19, 2012, 07:54:12 AM »

Transmit a few test calls, where you send something like:
VVV de W8XXX W8XXX W8XXX

Then after a couple of minutes check your call at:
http://www.reversebeacon.net

A network of stations will have automatically reported your signal strength from around the world.

Amazing or what?

73 Dave, G4AON
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W4VR
Member

Posts: 1198


WWW

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« Reply #10 on: December 21, 2012, 08:28:35 AM »

Try this website.  It's quite good.

http://www.globaltuners.com/home.php
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VE3LYX
Member

Posts: 160




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« Reply #11 on: December 23, 2012, 04:23:26 AM »

For 40M I built a crystal set and added a Lm386 audio amp for QRP stuff. Works very well for in shack motoring and spotting since image rejection is 100%
Don VE3LYX
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