[Laser] Results form a crude signal to noise versus frequency check on my optical receiver

[Kerry Banke]

Zack - Try Surplus Shed.  I think they have 4" at a reasonable price. I 
recently bought some 5" lenses for I think $12.
  - Kerry N6IZW -

At 07:19 AM 3/16/2006, you wrote:
>On Thu, 16 Mar 2006, Kerry Banke wrote:
>
> > After following the discussions on signal to noise versus frequency for 
> the
> > K3PGP type front end, I finally broke down and performed a crude test
> > on  own receiver last evening.  The receiver setup is a 4" glass lens with
> > 8" FL into an SFH-203 PIN diode ( 1 mm2, 11 pF)  detector followed by an
> > MPF102 with no bias resistor, MPSA18 Bipolar transistor  stage and an 
> LM386
> > amplifier.
>
>Anyone have a source for 4" lenses?  I've had a hard time finding
>something that size.  3" lenses abound but I'd like something bigger at a
>reasonable cost.
>
>73, Zack W9SZ
>
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