Thanks Stephen, found them.
John
>-----Original Message-----
>From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
>Of Stephen McGarry
>Sent: 17 August 2010 14:54
>To: ukha_d@xxxxxxx
>Subject: Re: FW: [ukha_d] CCTV & Video
>
>almost certainly a 1N4001 diode will do the job...
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