From: Johannes Wolf (mp2100_at_mail-gw.estec.esa.int)
Date: Wed Jan 19 2005 - 01:07:15 PST
In case the BL really goes down you can replace the BL luminescent foil.
Regarding the noise to be picked up by bats:
I am not sure, down to what frequency they are able to hear something, but
on the other side the buzzing noise from the BL (being a square wave) is
very likely to have some harmonics towards ultrasound - and this for sure
will be picked up by the bats.
Cheers
Johannes
> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of
> NeilMidlandArb_at_aol.com
> Sent: Tuesday, January 18, 2005 8:32 PM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] Backlight buzz
> Hi Guys!
> Only had my 2100 Newt a week so am on a very steep learning curve!
> Regarding the buzz and dimming, are they related and after what sort of
> period does the back light go dim and is it curable. I am
> planning to use mine for
> some dusk / night time monitoring work of bats.
> The back light is obviously useful and I must check out to
> establish whether
> the frequency from the transformer is likely to be picked up by bats?
> Regards,
> Neil. (UK).
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