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All posts by Nick

Below are all of Nick's postings, with the most recent are at the bottom of the page.


Chris SE
thanks. I am speaking of aa batteries, 1.5 volts, alternative to alkaline, and 3volt , about half inch + wide and inch long, found in some fire alarms. Both these voltages seem unusual for lithium which is normally 3.7v and both say not to recharge. I don't understand why.

Re log. the 52 element design is the same length as mine with, I believe 13 WHOLE elements. The picture though is not clear. The elements seem to be in pairs, closely spaced, so that you get two close then the next one is further, then back to close etc. The overall aerial to me seems to contravene sensible design, ie the elements are far too many and far too close. I need to find a good picture of it.

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Chris SE,
Thank you for so much info to study.
I still don't know, though, for example, what makes one lithium 1.5v battery rechargeable and another 1.5v lithium battery not.
I should have said my log is 16 whole elements, [I am speaking as of a yagi.] That is 32 of your little ones.

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Chris SE,
I have been in touch with Blake. I believed logs were meant to be good at rejecting signals from the rear. They say not and that their DMX range are better. Since their largest dmx is pretty much the same as what I have made myself, I doubt I would see any improvement.

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Chris SE, thanks.
I was communicating online, and he sent diagrams. It started with your advised log but ended up with the highest gain which from the 'x' type.
I have made extensive tests with my homebrew, just for my own interest, testing at each tiny change. I have altered spacings, length of elements, width and height of reflector and it is one of the few that gets 37. lengthening of elements brings better signal on 29, but if I do too much it loses on 47. I am particularly proud of the dipole which I call batwing, substantially larger than most.

Any more thoughts on 1.5v lithium batteries?

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