[Laser] My first experiments

[Paul M0EME]

Thank you for your words of encouragement Yves, I'm quite hooked for the 
moment hehe.
I noticed when I pointed the receiver towards the ground the 50hz hum 
increased even thought he ground was dark???? why should that be?
Straight up was very quiet, I've fitted 226 very bright white LED's to a pcb 
to use as a beacon from my QTH so I shall take the receiver to do some 
distance tests.
Thanks
----- Original Message ----- 
From: <F1AVYopto at aol.com>
To: <laser at mailman.qth.net>
Sent: Saturday, April 01, 2006 9:02 PM
Subject: Re: [Laser] My first experiments


> Paul,
> Your first results show a very good RX  sensitivity.
> You will notice the plane positioning flash lamps can be heard  very far 
> on
> line of site or by cloud bouncing.
> I did a test with F8DO with a  20 joules stroboscope flash for night club.
> F8DO could hear the beat at 40 km  from my QRA from the clouds but only if
> the repeat rate was less than 5 pulse  each second.
> Above the signal seems disappear.
> We have no explanation  about this phenomenon.
> May be it is the loaded / unload charge time effect in  the PIN photodiode
> capacitance in the K3PGP RX.
> Have good experiments
> 73  Yves
> http://pageperso.aol.fr/yvesf1avy/
>
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