KAT500 to KPA500 cable. Provides band data to KAT500 for band change prior to TX,, and feeds through KPAK3AUX cable data from the K3 to the KPA500. Typically used in addition to the KPAK3AUX cable from the K3 to route band data, keying and AUXBUS data through the KAT500 to the KPA500. (The KAT500 has AUX Cable IN and OUT connections.)
This is the same 15 pin cable as is contained in the KPAK3AUX cable set (see above, under the KPA500). That set also includes a Y cable expansion adapter and a TX line keying interrupt adapter for the K3 to KPA500 link.