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50 Watt QCX Amp construction tips
1) Tools: 35-45 watt Weller or Equivalent Pencil tip soldering iron Kester "44", .8mm solder M.G #452 solder wick ( accidents happen) DVM Rotating PCB holder KNIPEX 1511120 enamel wire stripper (Germa
1) Tools: 35-45 watt Weller or Equivalent Pencil tip soldering iron Kester "44", .8mm solder M.G #452 solder wick ( accidents happen) DVM Rotating PCB holder KNIPEX 1511120 enamel wire stripper (Germa
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By
George Korper
· #52283
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QRP-Labs 50 W Amplifier - low power output
Timothy, have you ever bought or built an amp from QRP Labs? Tell us your experience with the amp.Get in the back of the truck with us.
Timothy, have you ever bought or built an amp from QRP Labs? Tell us your experience with the amp.Get in the back of the truck with us.
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By
George Korper
· #52279
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QRP-Labs 50 W Amplifier - low power output
No sense involving Hans. I altered my building techniques. These are educational kits. I have received a lot of help from people on the net.
No sense involving Hans. I altered my building techniques. These are educational kits. I have received a lot of help from people on the net.
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By
George Korper
· #52277
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QRP-Labs 50 W Amplifier - low power output
I trust the builder has not done this and has exhausted most avenues. The builder is clearly capable. You don't need an unlimited budget, Hans has made these extremely affordable.
I trust the builder has not done this and has exhausted most avenues. The builder is clearly capable. You don't need an unlimited budget, Hans has made these extremely affordable.
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By
George Korper
· #52256
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QRP-Labs 50 W Amplifier - low power output
Not necessarily Allison. You can partially burn a trace and reinstalling components and rewinding transformers may not repair the problem. You also have much more equipment and diagnostic experience t
Not necessarily Allison. You can partially burn a trace and reinstalling components and rewinding transformers may not repair the problem. You also have much more equipment and diagnostic experience t
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By
George Korper
· #52250
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QRP-Labs 50 W Amplifier - low power output
Yes, I have built 10 or 11. I was working on improving my build quality and used them for the education. I wanted reliable methods so future projects would work first time. I made myself simple rules
Yes, I have built 10 or 11. I was working on improving my build quality and used them for the education. I wanted reliable methods so future projects would work first time. I made myself simple rules
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By
George Korper
· #52245
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QCX+ sidetone hum ... looking for suggestions
In my situation with the same antenna it was RF getting into the power cable. It doesn't take much and when I used a short battery lead and changed out earphones it was gone. Earphone leads pick up so
In my situation with the same antenna it was RF getting into the power cable. It doesn't take much and when I used a short battery lead and changed out earphones it was gone. Earphone leads pick up so
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By
George Korper
· #52213
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QRP-Labs 50 W Amplifier - low power output
This is a difficult problem and pretty depressing. I have had the same situation myself on one amp build. My conclusion was there was a fault in the board. A trace even a trace that looks good with a
This is a difficult problem and pretty depressing. I have had the same situation myself on one amp build. My conclusion was there was a fault in the board. A trace even a trace that looks good with a
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By
George Korper
· #52210
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QRP-Labs 50 W Amplifier - low power output
RF may travel in paths you have not forseen. That does not make it black magic,
RF may travel in paths you have not forseen. That does not make it black magic,
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By
George Korper
· #51860
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"Static Crashes" when moving the box
Mine was a faulty solder joint on IC pin. Now I alcohol wash before insertion.
Mine was a faulty solder joint on IC pin. Now I alcohol wash before insertion.
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By
George Korper
· #51802
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QRP-Labs 50 W Amplifier - low power output
The toroids are very good. I use them in making 49:1 antenna transformers for Half Wave End Fed Antenna systems where they also work well. Never had a bad one in 10 amps. That being said I have found
The toroids are very good. I use them in making 49:1 antenna transformers for Half Wave End Fed Antenna systems where they also work well. Never had a bad one in 10 amps. That being said I have found
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By
George Korper
· #51769
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Tone in RF out
This is the same tone from the circuit that A nearby SDR will pick up. The nature of the beast.
This is the same tone from the circuit that A nearby SDR will pick up. The nature of the beast.
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By
George Korper
· #51553
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help !
The decoder does that by showing you what you are transmitting. You can turn that feature on in the decoder menu.
The decoder does that by showing you what you are transmitting. You can turn that feature on in the decoder menu.
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By
George Korper
· #51523
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What to do?
I'd leave it. Formally I would have gone nuts. But look what you did as is! Real QRP and it's all up from now on sunspot wise.
I'd leave it. Formally I would have gone nuts. But look what you did as is! Real QRP and it's all up from now on sunspot wise.
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By
George Korper
· #51384
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Carrying case for QCX
Walmart has suitable padded cases in electronics. They come and go....it's Walmart.
Walmart has suitable padded cases in electronics. They come and go....it's Walmart.
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By
George Korper
· #51248
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QCX mini: RF output BNC or SMA
#poll-notice
Hi Hans, I concede and accept the election results. The. BNC it is and less inventory. Now it will all use a consistent set of jumpers with the amplifier. I enjoyed all your videos including your retr
Hi Hans, I concede and accept the election results. The. BNC it is and less inventory. Now it will all use a consistent set of jumpers with the amplifier. I enjoyed all your videos including your retr
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By
George Korper
· #51191
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Winding toroids
Hi Steve, I like the trifilar idea. Please try it and report back! Thanks, George
Hi Steve, I like the trifilar idea. Please try it and report back! Thanks, George
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By
George Korper
· #51140
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QCX mini: RF output BNC or SMA
#poll-notice
I like that idea!
By
George Korper
· #50928
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QCX mini: RF output BNC or SMA
#poll-notice
OK. I am thinking the longer BNC with the threads could be substituted with one that is shorter and needs no nut and lock washer. Democracy is all about arriving at the best solutions...hee hee. It ma
OK. I am thinking the longer BNC with the threads could be substituted with one that is shorter and needs no nut and lock washer. Democracy is all about arriving at the best solutions...hee hee. It ma
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By
George Korper
· #50924
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500 times for the SMA
Good low profile solution, and they work fine for me. Used on SotaBeam tuners.
Good low profile solution, and they work fine for me. Used on SotaBeam tuners.
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By
George Korper
· #50922
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