At 07:24 PM 9/6/2007, WILLIAMS MICHAEL wrote:

I'm getting ready to etch a two sided PCB for a satellite related homebrew project. The bottom side is the ground plane which I don't want etched.

What is the easy way to protect it from the etching solution?

Electrical tape? Masking Tape? Sharpie Pen?

Thanks

Mike K9QHO AMSAT 33589

Hi Mike, I use 2" wide masking tape. 73, Tony AA2TX

Hi Mike,

I have tryed several methods. Paint is the best one indeed, but I'm using electrical tape, is much-much easier. Just be carefull on the edges & corners of PCB, at these points is necessary a litle bit pressing in order to "glue" good enough the plastic tape with copper surface. Without enough pressing on plastic-tape, sometimes the copper is corroded.

BTW, if you buy "photo-sensitive" double-side PCB, this material has already a plastic cover in order to protect the photo-sensitive surface from light. In this case, DO NOT remove the plastic cover form the down-side. Thus you have the best protection against to etching action.

Good luck.

73, Mak SV1BSX

----- Original Message ----- From: "WILLIAMS MICHAEL" k9qho6762@sbcglobal.net To: amsat-bb@amsat.org Sent: Friday, September 07, 2007 02:24 Subject: [amsat-bb] Off Subject Question

I'm getting ready to etch a two sided PCB for a satellite related homebrew project. The bottom side is the ground plane which I don't want etched.

What is the easy way to protect it from the etching solution?

Electrical tape? Masking Tape? Sharpie Pen?

Thanks

Mike K9QHO AMSAT 33589

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