Apheared, I'll put in my $.02 if you don't mind. I've worked on medical equipment for 25 years now. Here's one solution I've seen, it's a primitive digital filter. See if you can measure the length of the 555 shot when it misfires. Build another 555 1 shot that has a period of at least...

Artmusic, Excellent job!! What is the case?? Any inside photos? no_iq

I have to agree with Tomo, Antex makes the best iron I've ever used, that includes PACE systems in the military. I've had an Antex 18W for almost 20 years and I love it. You can get them from http://www.mmnewman.com/antexsi/antex_index.htm I'll be ordering two on Monday, now that I've found...

While being impatient for my Insight order of 50 OPA2134 dips to come in August, I decided to look closely at the SOIC world. (pun intended) I see on the Brown Dog website, http://www.brndog.com/priclist.html , that they have an SMT op amp circuit board. Has anyone used the board or heard...

Gemul, Excellent job, very neat. What is the case? Manufacturer and model please, if you have it. Which power supply? single or dual 9v or other?

crk, Here's a drilling trick I got from someone at Headwize: Hold a nail with a pair of pliers and heat it with a flame.'Mark' the center of the hole in the plastic by pushing the hot nail into it. This serves as a pilot hole and stops the bit from wandering when you start to drill. For...

OK, I'll take a guess. They sound like the metal film resistors we used to use in the Army. Mind you, I'm talking some 30 years ago!! If you have one to spare, do a comparison test. Take a triangular file (everyone has one since Apheared suggested them in his 'tools' dissertation) and try to...

Eric, Just a guess as I am a real newbie. From my former reading at Headwize the problem COULD be the volume pot not tracking equally side to side. The fix, however, I'm not sure of. Hopefully someone else will elucidate. BTW, where did you find the OPA's? Still waiting for my order of 50...