"Spike" wrote in message
...
On 06/02/15 12:39, Jeff wrote:
FM has always been a legal mode for 80m in the UK, it's just that nobody
normally uses it intentionally.
Provided you're using no more bandwidth than normal AM I can't see a
problem.

Well perhaps not 'always'. FM was not allowed prior to about 1952.

There was an adaptation of the WS19 (I think it was the WS32) that used FM
instead of AM, to test the use of FM on the battlefield. I guess it was
unsuccessful or other considerations mitigated against it, because it
wasn't adopted in that form, but some manpack sets and WS19 candidate
replacements were FM. I think that only about 100 WS32 were made.

To ensure compatibility it would have been necessary to swap all the
military AM radios to FM at the same time.
The middle of a global war is not the time to make changes on that scale,
especially as the advantages of doing so seem minimal.
--
;-)
..
73 de Frank Turner-Smith G3VKI - mine's a pint.
..
http://turner-smith.co.uk