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DIY For Audio
You see, what we do is recycling! (DIY Air Core Inductors)
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<blockquote data-quote="ludo" data-source="post: 63346" data-attributes="member: 691"><p>600uH is a bastard. An empty solder reel is your friend. The ideal coil is apparently "square" ie winding depth = winding height. Most solder reels won't do this, but it helps to have some kind of former. If you have a crank to turn it with that also makes it easier. (A broken bicycle is a useful source of pedals for this.) Scratch the insulation after every layer of turns and measure as you go, but measure it off the metal crank unless you calculate AL of the assembly first. Inductance progresses as the square of the number of turns, so you might say it gets easier to the end. Neat turns mean less turns. One can run out of wire before you get there...</p><p></p><p>I just did a new pick-up coil for a spring reverb tank on a power drill. 1500 turns of 0.071mm wire. Works fine even just in a bunch, for the purpose, but it's not as hard on the hands as anything that goes in a speaker.</p><p></p><p>Ian is the man for the coils.</p><p></p><p></p><p>@VALVAGLO</p><p>I'd take you up on such a kind offer, but I don't have space for more. The last lot of LPs I bought had to sleep in the car for a day. ;D</p><p></p><p>You'll probably find a big greenish E-waste bin outside Makro in your area. Hopefully Desco still operates those. That's the best place to get rid of it. Fujitsu apparently handles the "branding" which is why so very few people know about these bins at all.</p></blockquote><p></p>
[QUOTE="ludo, post: 63346, member: 691"] 600uH is a bastard. An empty solder reel is your friend. The ideal coil is apparently "square" ie winding depth = winding height. Most solder reels won't do this, but it helps to have some kind of former. If you have a crank to turn it with that also makes it easier. (A broken bicycle is a useful source of pedals for this.) Scratch the insulation after every layer of turns and measure as you go, but measure it off the metal crank unless you calculate AL of the assembly first. Inductance progresses as the square of the number of turns, so you might say it gets easier to the end. Neat turns mean less turns. One can run out of wire before you get there... I just did a new pick-up coil for a spring reverb tank on a power drill. 1500 turns of 0.071mm wire. Works fine even just in a bunch, for the purpose, but it's not as hard on the hands as anything that goes in a speaker. Ian is the man for the coils. @VALVAGLO I'd take you up on such a kind offer, but I don't have space for more. The last lot of LPs I bought had to sleep in the car for a day. ;D You'll probably find a big greenish E-waste bin outside Makro in your area. Hopefully Desco still operates those. That's the best place to get rid of it. Fujitsu apparently handles the "branding" which is why so very few people know about these bins at all. [/QUOTE]
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DIY & Tutorials
DIY For Audio
You see, what we do is recycling! (DIY Air Core Inductors)
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