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Crystal rig
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Crystal rig
There has been quite a bit of talk on the NewtonTalk list about keeping the leads short on crystal speed upgrades...With this in mind, I developed this. (see picture) The 5Mhz crystal is connected directly to the original 3.686Mhz crystal I pulled out of the Newton. The other end of that crystal is connected to one contact of the switch. The other lead of the 5Mhz crystal is connected to the other connection of the switch. What may be hard to see here is that I created a small connection that joins the two crystals to the open solder pad. This will become more obvious (hopefully) when you see it installed. What's important here is accurate measurement! I basically laid the crystals on the Newt and took sections of wire and ran them to where they would end up. I then cut the just a tad bit longer than needed (just in-case) and created a 'rig'. The advantage of this method is that it keeps the leads short and creates a clean, easy to install (and troubleshoot) assembly.