Last updated: 8 September 2002
Subject: 70at ac power adapted Sent: Thursday, September 5, 2002 13:54:46 From: firstname.lastname@example.org I have come up with a mad idea for a cheap, yet effective solution to the battery pack. After recently purchasing the 70 at, I have been searching around for a viable substitute for the battery pack for indoor and backyard use. I first scoured the past pages of the site and it would appear that most of the suggestions are US based i.e. American specialist or based products. Being a UK practitioner with limited knowledge of all things electronic, I set out upon a quest to adapt a product to my ideas. I set off down the local Maplin/Radio Shack store and threw my ideas at the store staff. The basic idea was to take a modern ac/dc adapter (regulated, 800amp and changeable voltages from 3-12 volts). The new adapters have a blank connector within which you can insert a small two pin connector to connect items such as walkman or similar electronic device. I purchased a Uniross adapter (AD101704) as this was very small and light. I further purchased a PP3 connector (square battery connector), this has two bare wires which I subsequently tinned with solder to increase their girth to fit into connector holes and add to their conductivity. The wires have to be inserted the correct way around in order for the correct current to travel to the components. This can be easily tested with a multi-meter or simply pop the wires in the adapter socket, set the adapter switch to 9 volts, plug in the adapter and connect to the battery connector on the scope. Switch the power on and if nothing happens then you to simply have to reverse the polarity (switch the wires around). I then crammed in the all the wires into the battery compartment leaving the main wire to feed through the little gap in the battery closure lid. If the scope ends up wrapping the wire around itself or the tripod legs then the connector acts as a stop or you could trail the two PP3 wires through the closure lid hole so that if the wire gets pulled the two wires should pull free from the connector. The whole bundle takes about five minutes to setup and costs probably around 10-12 (cheap as chips). Cheers Jim
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