Re: Faulty Mini 360 Buck voltage regulator in the nano-DDS kit
|
Anytime someone finds a vendor, domestic or foreign, who sells product that is out of spec, they need to post that vendor's name on this forum. There's no need for this kind of crap and if enough of us detail who the bad suppliers are, they will learn that they have a choice: sort out the crap before they ship it, or lose sales here. Jack, W8TEE? From: "HankEllis@... [SoftwareControlledHamRadio]" To: SoftwareControlledHamRadio@... Sent: Thursday, May 26, 2016 6:28 PM Subject: [SoftwareControlledHamRadio] Re: Faulty Mini 360 Buck voltage regulator in the nano-DDS kit It has been my observation that parts sourced from China obtained through eBay can sometimes have sketchy quality control. Recently I obtained 200 .1uf 50v ceramic caps from one of the more respected suppliers. Checked each one and 80% were outside a +- 20% tolerance. Check of resistors frequently finds ones out of tolerance also. Logical to think that ICs and PCB products may have defective units also. Browsing through the posts here you can find instances of faulty finals and LM386 chips in the Forty-9er. Like with the caps even though I chunked 80% of them, it was still cheaper to source through eBay than through more traditional sources such as Mouser and Digikey. As long as I know up front to do my own QC I'm cool with it. Myself, if at all possible,?I check the value or function check?each component prior to stuffing it in the board. Not a slam to those kitting the nano-DDS kit. Just an observation of what we in the homebrew world have to deal with. Till later Hank K5HDE
|
jjpurdum