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VK6HT > CW_ALD 29.07.05 03:48l 24 Lines 1400 Bytes #999 (0) @ WW
BID : C60500VK6HT
Read: GUEST
Subj: Re: Aldis lamps..
Path: DB0FHN<DB0CL<DB0PDF<DB0SM<PI8DAZ<PI8WFL<ON0AR<7M3TJZ<KP4IG<ED1ZAC<
YV6BTF<PP5AQ<VK3KAY<VK3AVE<VK6HGR<VK6BBS<VK6BBR
Sent: 050729/0138Z @:VK6BBR.#PER.#WA.AUS.OC #:39980 [Roleystone] FBB7.00g
From: VK6HT@VK6BBR.#PER.#WA.AUS.OC
To : CW/ALD@WW
There seems to be a lot of debate re Aldis Lamps, I was in the Navy during WW2
and in the communication branch visual signals so had a lot to do with various
signalling lamps/projectors, the Aldis lamp was a hand held signalling device
with a tubular sighting device the trigger operated a concave mirror which
when the trigger was depressed brought the mirror to the point of Aim, there
were other smaller lamps with a tube shutter which covered the bulb (globe)
and when the trigger was depressed the tube would uncover the blub, there was
another which had filters blue was one of them, then there was the 10 inch
signalling projecter with shutters, these were fixed on either side of the
wings ( port and starboard side of the bridge and a 20 inch mounted on a
higher level on the bridge,the 10 inch had a range of about 10 miles and the
20 inch 20 miles,visual signalling not only consisted of lamps there were
flags and semephore as well, as noted, these were used to maintain radio
silence during War times, Having left the navy in 1954 thing have changed much
and vhf/uhf radio have taken over I hear, though, I am sure the above
mentioned signalling methods maybe still used.I am not sure what the other
branch of the forces used to communicat visually I do know that the Army used
to use helograph using the sun,s rays.
73 Bryan ex SCO
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