QDX: Section 2.16 “replace 47uH inductors”
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Folks at home, The error occurred when I got to section 2.16. I was fitting the wired axial inductor in place as per the instructions, when I crushed, or cracked the C2 component. (I was still able to solder the wire to the bottom of C2) Should I replace the item, or will it not affect the device? Best, |
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It's toast. Replace it. If you can fit a leaded component in there... That will work too. Fred W0FMS On Mon, Nov 15, 2021, 10:44 AM Jason K7JWN <jnoreen.jn@...> wrote:
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To augment Fred's comment: C2 is absolutely necessary: it's inline with the antenna, so without it the QDX is completely dumb and deaf. I'm not sure how you're getting any signal; maybe it isn't completely destroyed?
-- Julian, N4JO. |
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It's possible that some coupling is happening even with the cracked chip cap but it's not going to be anywhere near its designed value. On Mon, Nov 15, 2021, 12:04 PM Julian N4JO <n4jo@...> wrote: To augment Fred's comment: C2 is absolutely necessary: it's inline with the antenna, so without it the QDX is completely dumb and deaf. I'm not sure how you're getting any signal; maybe it isn't completely destroyed? |
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Jason, here's a link to one supplier: 100v unit https://www.newark.com/tdk/c3225x7r2a225k230ab/ceramic-capacitor-2-2uf-100v-x7r/dp/87R4504 The schematic and parts list don't indicate the voltage of this capacitor. I think the 50v one should work fine but others may comment. It certainly looks like the right physical size you are looking for..... Ron On Mon, Nov 15, 2021 at 12:09 PM Fred Spinner <fred.spinner@...> wrote:
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Yes, the 50V is the part used: it's in an 0805 package.
-- Julian, N4JO. |
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Eike Lantzsch
This seems to happen quite often while building the kits. And really it is a problem very common. Don't bend the PCB!
This video might be of interest to you and the kit-builder-community: https://www.youtube.com/watch?v=QgKY5QWehME On Montag, 15. November 2021 16:00:11 -03 Fred Spinner wrote:
> It's toast. Replace it. If you can fit a leaded component in > there... That will work too. > > Fred W0FMS > > On Mon, Nov 15, 2021, 10:44 AM Jason K7JWN <jnoreen.jn@...> wrote: > > Folks at home, > > I built the QDX kit over the weekend. Enjoyed every moment of this > > build. > > > > The error occurred when I got to section 2.16. I was fitting the > > wired axial inductor in place as per the instructions, when I > > crushed, or cracked the C2 component. (I was still able to solder > > the wire to the bottom of C2) Should I replace the item, or will it > > not affect the device? > > > > The QDX connects to my Windows 10 pc with no issues. I can see > > received signals on the FT8 & JS8 waterfall. I have not > > transmitted yet. > > > > If i need to replace C2, could one of you link me to where I can > > order this piece? > > > > Best, > > Jason K7JWN > > -- Eike Lantzsch ZP6CGE Ag. Molas Lopez Casilla de Correo 13005 01726 Asuncion / Paraguay SIPgate: +49-4131-9279632 Land-line: +595-21-553984 Cell-phone: +595-971-696909 Skype: eikelan Signal: zp6cge Eike Lantzsch WIRE: @eikelantzsch |
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And don't behead the surface mount devices while snipping the leads of the through hole parts!
-- Julian, N4JO. |
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Thank you! Hams are awesome!! 73, |
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Update: Thanks again to The awesome hams that commented and left links. 73!
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Jason,
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That is exciting. When I first built my QRP Guys FT8 rig I had turned it on, then turned around to look for something on the other side of the shack and VOILA when I turned back I had already made a contact. It was exciting but after a while the excitement and fun wore off and so it and the Midnight Designs Phaser I built later sit there unused. Too many other fun aspects to this great radio hobby. Dave K8WPE David J. Wilcox’s iPad On Nov 20, 2021, at 10:34 PM, Jason K7JWN <jnoreen.jn@...> wrote:
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