φανταζομαι θα αναφερεσαι στις τυλιχτες χορδες μια και εκει μονο υπαρχει διαφορα (οι ατυλιχτες χορδες ειναι ιδιες σε ολες τις μαρκες) μια και οντως οι ΕΒ επειδη εχουν λεπτοτερους πυρηνες απο τις περισσοτερες χορδες ειναι πιο "μαλακές" (υπαρχουν βεβαια και πιο μαλακές χορδες με στρογγυλους και οχι 6γωνους πυρινες και pure nickel wraps οπως οι PYRAMID)
το tension μπορεις να το βρεις και μονος σου κανοντας μερικους.....απλους ;D υπολογισμους...
In order to determine the tension at which a string will vibrate, you need three pieces of information: the Unit Weight, the Scale Length, and the Frequency of the string. You can use the formulas below to calculate the exact tension for any string using the scale length of your particular instrument.
UW- Unit Weight. Unit weight is expressed in pounds per linear inch (lb/in).
L- Scale Length. This is the vibrating length of the string. This is determined by
measuring the distance from the nut to the bridge of the instrument in inches (in).
F- Frequency or pitch. This is the pitch at which you will be tuning the string
expressed in cycles per second (Hertz).
To calculate the tension of a string in pounds use the formula below, inserting the three variables described above:
T (Tension) = (UW x (2 x L x F)^2) / 386.4
If you know what tension you want the string to have, you can calculate the string
unit weight. You can then locate a string with approximately the same desired unit weight.
UW (unit weight) = (T x 386.4) / (2 x L x F)^2