Coff,
I thought the Chipmunks were fitted with PTR175's in the end i.e. VHF and UHF. Don't know anything about their aerials though. Mod H337 in April 1980 although this was for PTR 1751 which may not have been VHF/UHF.
ACW
Last edited by ACW418; 20th Mar 2015 at 21:17.
Reason: Additional information