The title for this blog started back in the early 70's with an article in Audio magazine about an amplifier made by the Lirpa company. The frequency response of the amplifier was listed as "DC to Daylight". I am, by nature an analog geek, and i seem to collect lots of random bits of information on anything analog, quite literally from DC to Daylight. If i don't have it, i have probably seen it somewhere, and give me enough time and i can usually retrieve it. I have a few focused interests, such as audio amplifier design and RF design. So this blog will sometimes contain something random, but hopefully useful.
current projects........ (finally figured how to post..... YES!!!!)
Posted 6th June 2009 at 04:06 AM by unclejed613
i started this blog because i have a few projects i'm working on and wanted to bounce some ideas around.......
when i originally set this blog up, i couldn't find a link for posting blog entries, now i've found out how, so here goes......
1) working on a white paper about audio power amp output impedance and feedback.
2) working on a device that directly measures AC impedance the same way a DMM measures DC resistance, and does frequency sweeps and impedance graphs (and a whole lot more...). this device is a spin-off of the first project. this is the prototype and is a completely analog instrument.
3)working on a DSP based version of the impedance meter, using the DSP chip to act as the waveform generator, as well as compute the results of various tests.
a couple of projects using DSP for Software Defined Radio.
people who have read my posts will see that i use LTSpice for part of my prototyping process, as well as providing "quickie" schematics for answering questions in the forums. i highly recommend it as it is completely unlimited, no expirations, no node limits, no limit to the number of models you can add to it (only limited by the way models are written).
these projects are in the somewhat "advanced" category, and some of them are for specialized uses.
i'll also try to post some pictures of some counterfeit transistors i have run across in my business.
when i originally set this blog up, i couldn't find a link for posting blog entries, now i've found out how, so here goes......
1) working on a white paper about audio power amp output impedance and feedback.
2) working on a device that directly measures AC impedance the same way a DMM measures DC resistance, and does frequency sweeps and impedance graphs (and a whole lot more...). this device is a spin-off of the first project. this is the prototype and is a completely analog instrument.
3)working on a DSP based version of the impedance meter, using the DSP chip to act as the waveform generator, as well as compute the results of various tests.
a couple of projects using DSP for Software Defined Radio.
people who have read my posts will see that i use LTSpice for part of my prototyping process, as well as providing "quickie" schematics for answering questions in the forums. i highly recommend it as it is completely unlimited, no expirations, no node limits, no limit to the number of models you can add to it (only limited by the way models are written).
these projects are in the somewhat "advanced" category, and some of them are for specialized uses.
i'll also try to post some pictures of some counterfeit transistors i have run across in my business.
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