I recieved my kit for an "elite" clock recently, and inspecting the tube driver board revealed some poor soldering of the 44-QPF HV5622 drivers. One chip had a solder bridge between two legs, the other was not soldered on square with the pads.
Now, if you have hot air like I did, you will be able to rework the chips off the board, dress the pads, and resolder them correctly. If you don't, or are not comfortable with fine pitch surface mount soldering, this could spell trouble.
Just something to keep an eye out for. I will let PV know so that this hopefully does not occur moving forward.
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*Correction, 44 QFP (Quad Flat Pack)
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*Correction, 44 QFP (Quad Flat Pack)
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If they're selling a kit, why not make these chips a part of the assembly too? With a chisel tip and lots of flux, it should be manageable to solder and would be a good learning experience.
I completely agree, although from a business standpoint I suspect he wouldn’t sell as many kits, as many hobbyists are still afraid of working with SMD components. I know I was until I discovered liquid flux pens on eBay. 😁
Very nice work with your kit. The curly wood finish is gorgeous.I did rework mine off and resolder them. I'm not IPC certified but I think I did an alright job (see attached).I hope that mine was a fluke. If they're selling a kit, why not make these chips a part of the assembly too? With a chisel tip and lots of flux, it should be manageable to solder and would be a good learning experience.
On Sat, Jul 20, 2019, 9:48 AM <lokn...@gmail.com> wrote:
From closer inspection using my poor man macro lens (iPhone/jewelers loop) the joints are clearly hand soldered and the right row is a little questionable. I guess if your driver is lined up properly just use a flux pen and refresh your joints. I assume these are added by the board manufacturer so I would suggest PV-Electronics have a talk with them or find another source.
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<image2.jpeg>Sent from my iPhone*Correction, 44 QFP (Quad Flat Pack)--
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On Jul 20, 2019, at 10:10 AM, lokn...@gmail.com wrote:If they're selling a kit, why not make these chips a part of the assembly too? With a chisel tip and lots of flux, it should be manageable to solder and would be a good learning experience.I completely agree, although from a business standpoint I suspect he wouldn’t sell as many kits, as many hobbyists are still afraid of working with SMD components. I know I was until I discovered liquid flux pens on eBay. 😁
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I'm not afraid of SMD, I just can't see well enough and my hands shake when I'm stressed out. I have several kits sitting here waiting for the day when I can sit down and work on them comfortably, whenever that will be. Building kits is supposed to be fun and the fewer fiddly bits the better. For me the main advantage of a kit is that it's cheaper and having all the SMD already in place really greases the skids.
Do you want to hear about the floaters?
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Bill