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Newbee Q: Are there 'designated builders' for QRPLabs kits?
I have not heard of that here but I may have missed it. However, I will offer my services since I have successfully built one that works well and I have built several other kits for hams who did not want to wait, self-evaluated as all thumbs or wanted the radio but kits were not their thing!
I love building kits! The QMX was the most challenging since it really is a 5 pound radio in a 2 ounce box! Even got to replace a missing SMD capacitor I probably broke off the board while doing some required step. So here are two posibilities if you want a QMX: 1. You get a QMX kit shipped to me and I send you mine 2. You get whatever QRP Labs kit sent to me and I build it and send it to you. I am retired and have great time flex. Well, really, I wonder how I had time for full-time? employment! Your call. -- 73 Karl KI4ZUQ |
Mark, I live in West Allis and have built 2 QDX kits. They both work great. One for myself and oner for another ham. If you are interested, I'd be happy to help you out as we live very close. I also love building kits. I'm also retired so I have the time. :)
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73, Dean - KC9REN On Sun, Sep 17, 2023 at 10:25 AM, Mark/KD9NOO/airchecklover wrote:
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You won't have to worry about SMD since those are already on the pcb. You do the through-hole stuff.
The Q103/Q104 short test is mandatory, I had to use one of those china parts testers to id color coded parts since the china stripes all look the same! And I ain't color-blind! Might be an idea to scoot the turns on the toroids for better power out since that is nearly impossible once they are on the board. Scrape the windings ends in prep for soldering since heating does not really burn off the enamel. Build from the most recent assembly instructions! I loaded mine and printed it and stuck it in a binder so I'd be all ready when the bag of parts got here! I had so much rework! I apologize if you already knew all this! -- 73 Karl KI4ZUQ |
Hi Karl, Mark You won't have to worry about SMD since those are already on the pcb. You do the through-hole stuff. Yeah just do worry about not interfering with any of the SMD stuff already on the PCB, while doing the through-hole stuff! The Q103/Q104 short test is mandatory, In all recently supplied QMX kits we already did the Q103/Q104 drain short test and fixed the short if there was one, before shipping the kit. So theoretically the Q104/Q104 test shouldn't be needed for anyone whose kit was shipped in the last month or so. But it certainly never hurts to check!? I had to use one of those china parts testers to id color coded parts since the china stripes all look the same! And I ain't color-blind! But there are no colour coded parts on the QMX kit. Well the 47uH axial inductors have coloured stripes but as they're the only thing in the kit with stripes, there's nothing to mix them up with anyway! 73 Hans G0UPL |
I had to get a smaller iron for the QMX:
Hans, you are right about the stripes! But I checked every part with that gizmo just to be sure each was reasonably close to your specified value. All were close enough! I recently built a kit for a ham that was supposed to have four 47 ¦Ìfd axial lead can caps and they tested 4.7 ¦Ìfd! -- 73 Karl KI4ZUQ |
Just a quick note. Please, consider that building the QMX kit takes time. Before receiving it, I thought it would take me a couple of hours of work. It ended up taking me about.. 6-8 hours. I'm not a kit builder expert but I'm also not bad a it. Just take that into account when you ask some builder for the price of putting the QMX together... it takes time!
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A good portion of that assembly time will be spent winding toroids, checking the turns count, checking the tap is correctly located, double checking and triple checking, then correcting turns count errors.? I have been amazed at the dearth of complaints about toroid cores breaking. I worked in a couple of shops were wound inductors using toroids and the new guys took a few days to learn to wind an inductor without breaking a core in half. You always knew who the new guy was by the expletive laden tirades following a couple of hours successive core breaks. Chuck? WD4HXG
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