Interconnecting classic computers

[Tony Duell]

> 
> Tony Duell wrote:
> >> If you build something yourself (which would obviously then
> >> meet the "maintainability" requirements), you could throw
> > 
> > Well, I am not going to make the radio modules myself (no way can I meet 
> > type approval, even if I meet the technical specs)
> 
> Y'know, I remember electronics kits as a kid always seemed to include both an 
> AM transmitter and receiver project...

The Philips EE series of kits had reciever projects, but I don't think 
there was a single transmitter. Many other kits did, indeed, have 
low-power AM radio transmitter projects


> I'm sure they weren't legal, even back then - unless there is (or was) some 
> loophole for devices with really limited range/power.

I am pretty sure they were technically illegal in the UK (I don't know 
about other countries [1]), but that given the very low range (you were 
lucky for it to work across a room), and the fact it wasn't likely to be 
in operation for very long, then the chances of getting caught were 
essentially 0 (I certainly never heard of anyone having problems ffrom 
uilding such projects).

[1] Although I remember a warning in the manual for one such kit which 
was something like 'Connecting a long antenna to this project will 
violate FCC rules'

Longer-range devices, used for longer periods, as here, are a different 
issue, of course.

-tony