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Author Topic: New Member  (Read 919 times)
K4JGF
Member

Posts: 1




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« on: October 26, 2017, 12:41:23 PM »

New member here.  Not new to ham radio, been licensed since 1974 but inactive since 1989.  I'm beginning to put a small station together starting with CW QRP.  I've played around with an RTL SDR dongle using it to monitor 2M repeaters, weather and aircraft.  Lots of fun for $15.  I'm using an SDRPlay RSP2 now for HF listening and was thinking of pairing it with a small CW transmitter along the lines of the QRP Labs VFO kit + HF 5 watt PA.  I ruled out any simple xtal controlled CW transmitters, I think frequency agility is very important.  Is anyone using a setup like this for HF CW? 
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AC7CW
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Posts: 962




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« Reply #1 on: October 26, 2017, 01:21:44 PM »

I read AMSAT's book yesterday. Hams are using SDR dongles as rx's for satellite work if nothing else.

BTW, I'll never go inactive again! There is a mountain of work involved in getting up to speed on the state of the art of amateur radio Smiley
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Novice 1958, 20WPM Extra now... (and get off my lawn)
K0UA
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Posts: 1342




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« Reply #2 on: October 26, 2017, 02:02:12 PM »

I read AMSAT's book yesterday. Hams are using SDR dongles as rx's for satellite work if nothing else.

BTW, I'll never go inactive again! There is a mountain of work involved in getting up to speed on the state of the art of amateur radio Smiley

Well, that seems like a hopeful sign to me.  If we are stagnant, we are done.  If we are making some progress keeping up with technology, that bodes well.  I wish you well in learning the new techniques.  73 James K0UA
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K8AXW
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Posts: 6307




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« Reply #3 on: October 26, 2017, 10:48:01 PM »

Quote
BTW, I'll never go inactive again! There is a mountain of work involved in getting up to speed on the state of the art of amateur radio Smiley

What is really a shocker is being off the air for just a year and go to the shack and find that your don't remember how it all works!  Then when it doesn't work it becomes necessary to draw a schematic of the wiring because you forgot that you made a couple of changes a year ago and forgot all about it.

When this happens the mind becomes like a pool table when a rack is "broken."  Thoughts go in all directions....is my problem an incorrect setting on the gear....the antenna is bad....a cable is disconnected or in the wrong connector......HuhHuhHuhHuh??

BBAAAADDDD feeling!

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G4AON
Member

Posts: 1019




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« Reply #4 on: October 27, 2017, 01:32:34 AM »

I ruled out any simple xtal controlled CW transmitters, I think frequency agility is very important.
A simple weekend project is the VXO controlled Universal QRP Transmitter by W7ZOI (http://www.arrl.org/files/file/Technology/tis/info/pdf/0604028.pdf). I don't know about muting an SDR though.

The VOX works very well, I've done a couple of timing tweaks to the basic design, but it "just works". Watch the relay, they are polarised, ie the coil needs connecting with the correct polarity. See the control board in either my SSB TX or Companion TX for the changed component values, both my stand alone transmitters use the same basic control ideas as the Universal QRP TX.

http://www.qsl.net/g4aon/

73 Dave
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