Suggestions for VT103?

[Josh Dersch]

Thanks for all the good advice (from everyone) on this thread.  I need 
to wander out and find some good wirewrap wire & the appropriate solder 
and I'll let you know how I fare with the solder fest :).

Josh

Tony Duell wrote:
>> So forgive my inexperience here -- but just to make sure I'm 
>> understanding the changes I need to make -- is all that's necessary just 
>> wiring up the address lines (18-21) from slot 1, to slot 2, to slot 3, 
>> to slot 4?
>>     
>
> Yes, but I think it's _twice_ on each slot (the Q-bus being based round 
> dual-height boards). So a total of 8 points to link for each of 4 wires.
>
> But it is just a matter of running wires between those points and 
> soldering them down.
>
>
>   
>> Also, just to satisfy my curiosity -- it's been mentioned by several 
>> people that lead-based solder is necessary -- why is this?  (I think I 
>>     
>
> Is there ever a good reason not to use leaded solder in homebrew stuff 
> and classic computer repairs (neither of which come under any RoHS 
> directives in the UK)?
>
> It is a very bad idea to mix solders, the worst way, or so I am told is 
> to use lead-free solder on a PCB that was originally soldered with leaded 
> solder (the VT103 certainly was!) The resuling lead-free solder 
> contaminated with a little lead produces a very poor, brittle, joint.
>
>   
>> have a spool of it somewhere that I liberated from my grandfather's 
>> basement some years back, but I'll have to dig it up...)
>>     
>
> This is electornic-grade resin-cored solder, I hope!. You can still buy 
> leaded solderm at least in the UK, fortunately.
>
> -tony
>
>
>