[Laser] web sites/activity

[David Riley]

Johnathan et al,

Baseband is easiest and works well for DX and local, but, we have a
transverter which plugs into the HF rig which gives us a milliwatt for PA
amp and great receiver from DC to 500kc. any mode. This makes for real good
commercial quality all mode for VLF, ultrasonic and MF comms either into an
antenna of laser, even modulates a gunnplexer on 10ghz.
The narrower the BW the more the DX as seen here, have tried TV and 10mb
ethernet but not for long haul especially with preceip and other WX.
Best response so far is the 800hz. sig from the ve2IQ interface or sound
blaster DSP.  Probably psk-31 would be good but long integrated 800hz dsp
with fftzz ( ve2IQ ) left on all night sees plenty of sigs from
'someplace'..
Also tried TV remote for GREAT DX and remote control..  Presently am trying
SCADA and a way to fully modulate a he-ne, nil so far..  Think Steve is
right, diode laser best for this but like stability of hene for 'bounce' and
'doppler' reception...  Chick Wb6IBP? use to have some 'crystal' modulators
for he-nes but I havn't tried them or seen them used.. That would be a good
'digital' modulator...
Also use 30mw laser into reverse end of telephoto lense which makes a tube
of light for cloud and layer bounce, Columated with this is a ccd camera
that sees returns and 4" lens receiver into a PIN front end for data and
'distance' measurements. This is about as good as the best tube receiver at
VHF was during the early 2M days here.
As soon as we establish an 'easy' link, I think things will open up and
become more interesting for more do it yourselfers...  One can get started
nicely from RadShack wall stock. Havn't seen the BEST of the 100k ft. layer
bounce as yet either..

73s from Dave - AA1A - FN42PB
----- Original Message -----
From: "W2MXW" <weatheradio@worldnet.att.net>
> Question...what kind of modulation would you guys prefer...? I was
thinking
> FM w/subcarrier, maybe 20 or 25 kHz (keeping within the range of the K3PGP