KØHB wrote:
I have a GAP Voyageur-DX vertical (160, 80, 40, 20M) which has recently shifted
its' resonance points.

160 now resonant at 1990kHz, previously at 1825
80 now resonant at 3980, previously at 3725
40 not resonant in band, previously at 7100
20 now resonant at 13775, previously at 14150

The antenna is physically solid, all wires are OK and properly attached, the
three counterpoise wires are intact and connected. I have changed out the
capacitor buried at the top with no change in symptoms.

Any suggestions?
coroition causing Capitance at some joint?

feedline devolped and leak and changing the matching condiction?