MN Ham Phones
100+ Head-Fier
- Joined
- Mar 9, 2004
- Posts
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Finished my TEPS power supply tonight. It is the first module done for a full blown PPA I am slowly working on.
Ordered parts from Tangent, Digikey, and Mouser. Also needed a few misc bits from local electronics supply house and from RatShack.
Only misstep was missing the polarity of C7. I forgot that electrolytics weren't the only cap with polarization. Pulled it out, regulator still worked, so put it back in the right way. It is dam*ed difficult to clean out tiny plated-thru holes. Could only do it with a micro sized drill bit from way back when I made my own boards for ham radio projects.
All tests went fine once C7 was replaced correctly. Doh!
AC riipple is smaller than my Fluke can display. Will check ripple and waveform on a 'scope at work after the Holiday. Also will check operation with a real world load on it.
Final cost was $102 (U.S.) and change. This includes about $17 in chemicals and tools that will be used in the future.
I built nearly 150 Heathkits in the 70s-80s. Only simple scratchbuilt stuff since then. It was REAL good to be back at component level construction again!
Once I have absorbed the shock of a new car purchase I can move on to the rest of the PPA. Then a new source and new cans
Here's a couple of pics.
Ordered parts from Tangent, Digikey, and Mouser. Also needed a few misc bits from local electronics supply house and from RatShack.
Only misstep was missing the polarity of C7. I forgot that electrolytics weren't the only cap with polarization. Pulled it out, regulator still worked, so put it back in the right way. It is dam*ed difficult to clean out tiny plated-thru holes. Could only do it with a micro sized drill bit from way back when I made my own boards for ham radio projects.
All tests went fine once C7 was replaced correctly. Doh!
AC riipple is smaller than my Fluke can display. Will check ripple and waveform on a 'scope at work after the Holiday. Also will check operation with a real world load on it.
Final cost was $102 (U.S.) and change. This includes about $17 in chemicals and tools that will be used in the future.
I built nearly 150 Heathkits in the 70s-80s. Only simple scratchbuilt stuff since then. It was REAL good to be back at component level construction again!
Once I have absorbed the shock of a new car purchase I can move on to the rest of the PPA. Then a new source and new cans
Here's a couple of pics.