pcb lacquer problem/ Pulsar tremolo problem

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1/1/2003 8:51 PM

Geert J.

pcb lacquer problem/ Pulsar tremolo problem Hi,     I ordered some pcbs at a local shop to build the Pulsar from http://www.tonepad.com   When I started soldering I noticed that it didn't go to well. Later I discovered that there was some kind of lacquer or varnish (how do you call it in english?) on the pcb(on the copper too).   Now my pedal isn't working properly and I suspect bad soldering welds (because of the lacquer).     How can I make this right?   What should I do with such a pcb before I solder something on it?     Thanks,     Geert J.

 

1/2/2003 8:49 PM
bill bergman	How did you etch the pcb? If it had a lacquer coat the etching solution wouldn't have worked. After etching I scrub the board down withe steel wool and when soldering I use a non-acidic liquid flux on every solder joint.

 

1/2/2003 9:27 PM
Geert J.	The pcbs were made at the store.   I had a pcb made at another store a few years ago and I had no throuble soldering that one. I guess that the Pulsar pcbs I got now are finished with a protective coating that I should have scrubbed of before soldering (or something like that...)     G.

 

1/2/2003 9:42 PM
bill bergman	Usually commercial pcbs are lacquer coated except for very small tinned pad areas for soldering. They should not need preparation. Did you use any liquid flux?

 

3/28/2003 3:18 PM
alf	Hi Geert,     Maybe after etching the copper traces weren't cleaned well . I always use "Aceton ".     Groeten Alfons van Luyt

 

4/1/2003 4:09 AM
darren	the lacquer applied to pcbs allows you to solder thru with no problems. Check to make sure it's not somethings else like your wiring etc. I don't think lacquer would be the issue.

 

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