“Kairos” Harp (by Pepe Weissgerber) with Biocarbon (Sugar) strings “Aquila Corde”

Model Kairos (Weissgerber harps) is originally strung with gut strings.

WARNING: If you’re restringing your “Kairos” with sugar strings (in this string chart I also made the gauges 2 notches thinner than the original gut strings), you will have to considerably readjust the levers for correct intonation!

NEW STRING CHART:

31* Pyramid D wound this string is a low D*
30 Pyramid G wound (as original)
29 Pyramid A wound (as original)
28 Pyramid B wound (as original)
27 Kuerschner IP 514722 c carbon (as original)
26 Kuerschner IP 51360 d carbon (as original)
25 Kuerschner IP 51300 e carbon (as original)
24 SUGAR f 144   (144=gauge 1.44mm)
23 SUGAR g 140
22 SUGAR a 136
21 SUGAR b 128
20 SUGAR c1 120
19 SUGAR d1 112
18 SUGAR e1 108
17 SUGAR f1 100
16 SUGAR g1 94    (94=gauge 0.94mm)
15 SUGAR a1 91
14 SUGAR b1 85
13 SUGAR c2 82
12 SUGAR d2 79
11 SUGAR e2 76
10 SUGAR f2 73
9 SUGAR g2 69
8 SUGAR a2 63
7 SUGAR b2 61
6 SUGAR c3 61
5 SUGAR d3 56
4 SUGAR e3 53
3 SUGAR f3 53
2 SUGAR g3 51
1 SUGAR a3 51

*the string gauge for this string is measured to be tuned to low D rather than F to suit Irish music.

For comparison 2 sound samples of this harp:

(original gut strings)

(new biocarbon = sugar strings)

Reidun Schlesinger, November 2025