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Re: Inaudible noise on telephone lines...
Hi Frank,
Thanks for the circuit - may come in useful if I can't find a cheap
ready made device. As for switching the polarity - yep, I've tried
everything I can think of...!
Thanks,
Andy.
--- In ukha_d@xxxxxxx, "Frank Mc Alinden" <fmcalind@b...>
wrote:
> Hi Andy
>
> Did a quick google ...Have a look at the link below ....Have you
tried
> swapping the line connections ??? just a stab in the dark ......
>
http://home.att.net/~theremin1/Circuit_Library/offhookdcindicator.html
>
> HTH
> Frank
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