Date   : Wed, 18 Mar 2009 20:39:32 -0000
From   : bbcmailinglist@... (Ian Wolstenholme)
Subject: Ugly beeb hacks

Yes, doing the 1770 upgrade with paper clips is definitely not recommended.
I didn't have an Acorn 1770 kit, I think I was using a third party board like
the Watford DDFS or something I'd acquired somehow, so it was just the
board without the wire links.  I eventually restored the Beeb to 8271 DFS
but the paper clips had damaged the IC sockets and it took a while to
persuade the disc interface to continue working.  I don't think I would be
able to remove the chips again and still be able to use the sockets.

Best wishes,


Ian

----- Original Message -----
From: Peter Coghlan [mailto:PCOGHLAN@...]
To: bbc-micro@...
Sent: Wed, 18 Mar 2009 12:12:39 +0000 (WET)
Subject: Re: [BBC-Micro] Ugly beeb hacks

>
>I have found paper clips very handy in Beebs.  The 1770 disc upgrade
>needs a bit of wire to go across two pins in one of the chip sockets and I've
>used a bit of paper clip to do that.  My first ever "Econet lead" was made
>with 1-inch lengths of paper clip being pushed into the DIN socket holes
>and soldered to some miscellaneous wire from a mouse.
>

The problem with pushing paper clips into IC sockets is that that it can
push the sides too far apart to make proper contact with IC pins if an IC is
later fitted to the socket. I speak from bitter experience here (although it
was actually an oscilloscope probe in my case) and it took me quite some time
to figure out what the problem was :-(

Regards,
Peter.

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