Wenn man mal Googelt findet man eine Reihe von Hinweisen, dass das Gerät da ein massives Problem hatte/hat.
Zumindest frühe Geräte haben da einen Implementierungsfehler und bedienen die Bandbreiten Umschaltung nicht/falsch.
Es scheint dazu ein Update zu geben, aber man muß das Gerät dazu wohl in die USA schicken...
CloudHound
9th Apr 2018, 15:32
...it has to be modded by ICOM America to retain TSO. Here′s the email just in:-
We can now offer you a upgrade modification for your A220T , which will allow it to tune, 25k, 8.33k ,8.33k , 8.33k , 25k simultaneously , allowing for easier on board operation.
The upgrade however must be done at our production facility in the USA to comply with TSO rules so the radio will have to be forwarded onto there.
As part of the process, your radio will have its TSO approval history revised and 8130 form re-issued in line with the factory modification.
The upgrade is free for a limited period and if you wish to take advantage of it you will need to return your radio to Icom UK so we can ship it to the USA. Please contact Chris or I so we can book your radio into our upgrade program and get it turned around as quickly as possible. We plan this to be around 15 working days, however this is an estimate and it may in the worst case be a little longer.
NB From here we can only arrange this for radios we have supplied in the UK/Southern Ireland through our UK/Southern Ireland dealer network.
Thank you for your patience and we look forward to hearing from you,
King regards
Virgil
Mehr Details findet man z.B. hier
https://www.pprune.org/archive/index.php/t-606780.html
Gruß
Andreas