[aprssig] Trouble with Calculator Serial Cable

[gerheim at cox.net]

Yup.  I made a pit stop at Radio Shack.  Actually, a look in my junk drawer would have produced the same results.  

The ferite chokes are doing the trick.  

BTW, just hope the locals don't mind all the packets I'm pumping out.  It's the only way I can test it.  

Try findu for K1QN-1 / Raw APRS for a laugh.  


---- Dave Baxter <dave at emv.co.uk> wrote: 
> Or even better, opto isolate it.  Sounds like you have a conducted RFI problem.  Use a decent external antenna connected to the D7, but with a seperate ground plane, even a 1/4 wave "mag-mount" will drasticaly reduce the ammount of RF on the serial cable, and also improve the RX performance too..
>  
> 73..
>  
> Dave G0WBX.
>  
> 
> ________________________________
> 
> From: John Habbinga [mailto:kc5zrq at gmail.com]
> Sent: Fri 25/05/2007 15:38
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] Trouble with Calculator Serial Cable
> 
> 
> 
> Install a ferrite filter on the cable.
> 
> Example:
> https://www.argentdata.com/catalog/product_info.php?cPath=21&products_id=44
> 
> 
> 
> 
> This mail has been scanned by Palmer Cook Computer Services Limited.  www.palmercook.co.uk

--
-Al Gerheim

HP-49G+ Software Page:
http://members.cox.net/above