Monthly Archives: February 2011

Power Supply Connections

I’m using the same wire for the supply connections as used for signal.  I always think of power supply lines as signal lines, they just happen to be carrying large signal currents as opposed to smaller ones. The wire is … Continue reading

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Power Amps Finished

Well, mostly.  I haven’t yet added decoupling or linked all the common wires together or connected the output transistors.  But that’s because I do not yet know where things will go so those jobs will come during the ‘Unify’ stage. … Continue reading

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Back Up & Running

I have found this with Weller irons before. I’ve had the thing apart and cannot find any problem electrically – I was expecting internal breaks on cables. But nothing has been found and now it is back together it works … Continue reading

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Oh Dear!

After many years (actually decades) of hard work, my trusted Weller soldering iron may have had its day. It has been intermittent for a while but has now gone cold completely – I’ll take it apart and see what may … Continue reading

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Power Amp Construction Starts

The photo here shows the power amp under construction.  As you can see it is ‘air wired’. Why do I not use printed circuit boards (pcbs)?  It isn’t cost.  Although PCBs would initially be expensive for me to manufacture, the time … Continue reading

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Using DIPs for the op amps

Here are the pre amps almost finished only this time using DIPs (Dual In-line Package).  These are also known as PDIPs and CDIPs with the first capital denoting either plastic or ceramic. The build was much easier but still not … Continue reading

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Using SMD for the op amps

I very much believe in the concept of having the shortest signal paths possible, so decided to use surface mount device packages (SOIC).  As daunting as it seemed I was sure with a little patience I should be able to … Continue reading

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