I don't know who wrote the instructions you got. I've not worked on installing that board.
It sounds like it uses some open vias (the round 'grommets' that join traces different opposite layers of the board together. I'd bet the person who created the document had a version with open vias. However, I've noticed that some boards have the vias open and others have them full of solder. Ron AC7AC -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mike Scott Sent: Friday, July 03, 2009 1:05 PM To: [email protected] Subject: [Elecraft] K3 Audio Low Pass Filter I just completed an installation of the K3 audio low pass filter board, the one Lyle put out to individuals who wanted to try it. I was busy until now as the boards came out some time ago. It took a lot longer than expected because all the K3 DSP board holes were full of solder. The instructions seemed to indicate that four of the holes should have been clear, i.e., just stick the leads through. The instructions seemed to be missing a section though as they never suggested soldering four of the wires. I thought maybe a page was missing but the step numbers didn't seem to indicate missing steps. Anyway, solder wick and solder suckers didn't work. The holes are very small and it is tight quarters where a miscue of the soldering iron could cause damage. I finally had to heat the wire I wanted to put in the holes (resistor leads) and heat my way through the soldered holes. For future reference, what would be the right way to do this? I would like to consider making more audio modifications, the one changing headphone audio coupling capacitors to larger values for example. I looked at those capacitors and I wondered how I was going to get them out. The solder leads on one side seemed to be down at the bottom of a narrow canyon caused by interfering components. Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) NAQCC 3535 K3-100 #508 / KX1 #1311 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
