I now have 400 pcs of LD1014D. There are several different arrangements of numerical strings in adjacent location on the tape that holds the parts. I will do some sorting and curve tracing and see if I can discover a pattern.
As long as all the parts have the triode curves, I don't care that the parts are not all identically marked.
Having tested and sorted ~500 pcs from Mr Pass's stash, as long as you have a large enough population, you will get mostly (>95%) matched pairs.
As long as all the parts have the triode curves, I don't care that the parts are not all identically marked.
Having tested and sorted ~500 pcs from Mr Pass's stash, as long as you have a large enough population, you will get mostly (>95%) matched pairs.
I got a strip of 50 last week, a mix of 3 different type. A few of those I can't see the marking without a magnifier.
The predicted DF for the LuFo is about 150. That depends on an inductor that holds enough energy for bass frequency.
My guess is that the original manufacturer made this strip and placed these parts. I doubt that a recycler in China goes to the trouble of mounting these in a strip that is used in a pick-and-place machine and then sells them for USD $0.17/each.
Yes, it is labeled LD1014D. The date/lot code is different than the others - it ends in H, whereas the other package type has a code ending in G. Perhaps it's just from another production run?
Unfortunately, it will likely be a long while before I can confirm either way.
Your are a good spy indeed TA!
FQA40N25
Yes Anand, nice real estate allowed for the input and output bypass film capacitors. Go conservative or wild with them.
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