prendo spunto dalla discussione di Gianni sul suo pezzo di mogano massiccio:

http://forum.megabass.IT/viewtopic.php?t=2060&highlight=





un sapiente collocamento del (o dei) pick-up ? fondamentale per un basso degno.

incollo - mi auguro non ci siano prob. - un post del notevole liutaio statunitense Dolan copiato da un altro Forum. parole piene di saggezza:


"If you divide your scale length by numbers divisable by 2 or 3 you can figure the harmonic points. For instance: 34" divided by 6 =5.66. This is a harmonicly rich position (Fender P) but there are lots of caveots. First and foremost is that whenever a note is fretted IT changes the scale length and there goes your harmonic. On the E string, fretted at the first fret (F), the scale is 32" and 32 divided by 6 is 5.33 which means that the harmonic has moved toward the bridge by 1/3 " and is no longer under the middle of the pickup. Another consideration is that the compensated (intonation) length of the string is longer than the scale length and so the length of the Low E on your bass is is more like 34 1/4" which places our harmonic at 5.71" and, as if that weren't bad enough, each string has a different compensated length. I happen to like the theory of placing a pickup at the harmonic point, but as IT turns out, IT's kind of arbitrary. The rule of thumb that does apply is that the closer you get to the bridge, the tighter and brighter the sound will be and visa-versa. I consider the practical limits to be no closer to the bridge than 2" (too thin) and no further that 1/4 the scale length (too mushy). If you build instruments, like I do, you use the scale length to position the bridge and to mark all the pickups, etc, because, for one thing, you're often doing this without a neck in place. As a suggention, your pick-ups will sound great at 2.5" and 5.5" from the scale length line. Good clarity and lots of difference between the two."

Io uso: solo le dita
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Il blog del Solista

http://www.luigidemarchi.it

la mia ignoranza nell'inglese non mi ha permesso di capire molto

Io uso: solo le dita

Interessante.

In pratica sembrerebbe che, come sospettavo, non ci sono delle posizioni precise migliori di altre, a patto di non finire troppo vicino al ponte o troppo lontano, oppure di mettere 2 PU in una posizione relativa errata (cio? o vanno messi vicinissimi, tipo humbucker o sufficientemente lontani, cio? non vanno bene posizioni paragonabili alla met? della distanza tra i 2 jazz...? non funzionano neppure distanze eccessive, alquanto maggiori della distanza tra 2 jazz.

Se non ho capito male, l'ultima frase suggerirebbe 6,3 cm e 14 cm dal ponte, ovvero, come li misuro io, circa 36,5 e 29 cm dal 12? tasto..

Ciao!!
Gianni

Io uso: plettro e dita